Sunday, May 22, 2022

How to install Miniconda Environment in Linux

Download the latest Miniconda version from the official download page.

$ wget https://repo.anaconda.com/miniconda/Miniconda3-py39_4.9.2-Linux-x86_64.sh

Go to the location where you downloaded the Miniconda installer and check the integrity of the downloaded file with SHA-256:

$ sha256sum Miniconda3-py39_4.9.2-Linux-x86_64.sh

You will see an output like below:

What is Miniconda Script?

Miniconda is a minimal and stripped-down version of Anaconda distribution. As the name implies, Miniconda contains only Conda package manager, Python and a small number of useful packages such as pip, zlib including their dependencies.

Miniconda is suitable for those who don't mind to install each package individually. It saves you not only the disk space but also avoids dumping a lots of unnecessary applications that you don't use often in your hard drive. For those wondering, Anaconda distribution automatically installs 1,500 packages that consumes around 3 GB disk space. If you use only a handful of applications, miniconda might be a good choice!

How to Install VLC dan Totem Player in Fedora 33 with Flatpak



The previous method is perfectly fine to install and enable most commonly required multimedia codecs in Silverblue. In addition, you can install VLC or Gnome Videos (Totem) or Celluloid (Formerly Gnome Mpv) to get all necessary codecs.

To install VLC on Fedora Silverblue, run:

$ flatpak install flathub org.videolan.VLC

To install Gnome Videos on Fedora Silverblue, run:

$ flatpak install flathub org.gnome.Totem

Another popular media player is Celluloid that has codecs to play all type of media files. To install Celluloid on Fedora, run:

$ flatpak install flathub io.github.celluloid_player.Celluloid

At this stage, you should have all necessary multimedia codecs installed on your Fedora Silverblue system.

How to Enable RPM Fusion repository on Fedora Silverblue

Many video codecs are non-free, so they are not included in Fedora default repositories and Flathub. So adding RPM Fusion repository is necessary. RPM Fusion repository provides the software which are not included in Fedora and Red Hat.

Saturday, May 21, 2022

How to Use ELevate Script to Upgrade CentOS to AlmaLinux



Step 1: Install ELevate

 Install elevate-release package in your CentOS 7 system using command:
$ sudo yum install http://repo.almalinux.org/elevate/elevate-release-latest-el7.noarch.rpm
Step 2: Install Leapp and migration data 

What is ELevate Script?

 ELevate is an open source migration tool developed by AlmaLinux team. It allows you to easily and smoothly migrate between major versions of RHEL-based distributions from 7.x to 8.x version.

ELevate combines Red Hat's Leapp framework with a community created library and service for the migration metadata set required for it.

It currently supports migration from CentOS 7 to the following OSes:

  • AlmaLinux OS 8
  • CentOS Stream 8
  • Oracle Linux 8
  • Rocky Linux 8

Migrations can be done in place, meaning data and configuration files are preserved. In other words, all the installed applications and settings and data will remain intact. However, the users are HIGHLY ENCOURAGED to backup the important data before starting the migration.

ELevate is an open source program, released under the Apache 2.0 License.

How to Migrate from CentOS 8 to AlmaLinux


 

A word of caution:

As usual, backup important data from your CentOS system before starting AlmaLinux migration task. I tested this script in a freshly installed CentOS 8 virtual machine. My VM doesn't has any data and it is a server edition with minimal installation. It worked just fine without any issues as expected.


Step 1: Update your CentOS system to latest available version as root or sudo user:

$ sudo dnf update

Step 2: Reboot your system to apply the updates:

How to Install Golang in Linux



Install Golang In Linux Using Update-golang Script 

 Download the Update-golang script by cloning its repository from GitHub:
$ git clone https://github.com/udhos/update-golang
The above command will clone the contents of official update-golang repository in a local directory named update-golang. Cd into this directory:
$ cd update-golang
It is always recommended to check the integrity of a script downloaded from Internet. So let us do that by verifying the CHECKSUM value of update-golang script:
$ wget -qO hash.txt https://raw.githubusercontent.com/udhos/update-golang/master/update-golang.sh.sha256
$ sha256sum -c hash.txt
If you get an output as OK, you're good to go.
update-golang.sh: OK
After verifying the chekcsum, run the following command to install latest Golang version on your Linux machine:
$ sudo ./update-golang.sh
Sample output:

update-golang.sh: version 0.24
update-golang.sh: find_latest: found last release: 1.16.2
update-golang.sh: user: uid=0(root) gid=0(root) groups=0(root)
update-golang.sh: RELEASE_LIST=https://golang.org/dl/
update-golang.sh: SOURCE=https://storage.googleapis.com/golang
update-golang.sh: DESTINATION=/usr/local
update-golang.sh: RELEASE=1.16.2
update-golang.sh: OS=linux
update-golang.sh: ARCH_PROBE=uname -m
update-golang.sh: ARCH=amd64
update-golang.sh: PROFILED=/etc/profile.d/golang_path.sh
update-golang.sh: CACHE=/usr/local
update-golang.sh: GOPATH=
update-golang.sh: DEBUG=
update-golang.sh: 
update-golang.sh: will install golang go1.16.2.linux-amd64 as: /usr/local/go
update-golang.sh: https://storage.googleapis.com/golang/go1.16.2.linux-amd64.tar.gz is remote
--2021-03-30 06:02:35--  https://storage.googleapis.com/golang/go1.16.2.linux-amd64.tar.gz
Resolving storage.googleapis.com (storage.googleapis.com)... 2404:6800:4009:81f::2010, 2404:6800:4009:820::2010, 2404:6800:4009:81d::2010, ...
Connecting to storage.googleapis.com (storage.googleapis.com)|2404:6800:4009:81f::2010|:443... connected.
HTTP request sent, awaiting response... 200 OK
Length: 129010536 (123M) [application/octet-stream]
Saving to: ‘/usr/local/go1.16.2.linux-amd64.tar.gz’

/usr/local/go1.16.2.linux-amd64.t 100%[=============================================================>] 123.03M   501KB/s    in 5m 2s   

2021-03-30 06:07:40 (417 KB/s) - ‘/usr/local/go1.16.2.linux-amd64.tar.gz’ saved [129010536/129010536]

update-golang.sh: remove_old_link: not found symlink for old install
update-golang.sh: untar: tar -x -f /usr/local/go1.16.2.linux-amd64.tar.gz
update-golang.sh: profile_path_add: issuing new /usr/local/go/bin to /etc/profile.d/golang_path.sh
update-golang.sh: profile_path_add: issuing $HOME/go/bin to /etc/profile.d/golang_path.sh
update-golang.sh: golang go1.16.2.linux-amd64 installed at: /usr/local/go
update-golang.sh: testing: /usr/local/go/bin/go version
update-golang.sh: unsudo: running_as_root:ostechnix: /usr/local/go/bin/go version
update-golang.sh: go version go1.16.2 linux/amd64
update-golang.sh: /usr/local/go/bin/go version: SUCCESS
update-golang.sh: unsudo: running_as_root:ostechnix: mktemp -t hello-tmpXXXXXXXX
update-golang.sh: unsudo: running_as_root:ostechnix: tee /tmp/hello-tmpqGBVcjhy.go
update-golang.sh: testing: /usr/local/go/bin/go run /tmp/hello-tmpqGBVcjhy.go
update-golang.sh: unsudo: running_as_root:ostechnix: /usr/local/go/bin/go run /tmp/hello-tmpqGBVcjhy.go
update-golang.sh: hello, world
update-golang.sh: /usr/local/go/bin/go run /tmp/hello-tmpqGBVcjhy.go: SUCCESS
update-golang.sh: running_as_root: yes
update-golang.sh: recursively forcing build cache [/home/ostechnix/.cache/go-build] ownership to 1000:1000
Install Golang In Linux Using Update-golang Script
Install Golang In Linux Using Update-golang Script

Check Golang version and environment information 


 To verify the installed Go version, run:
 go version
go version go1.16.2 linux/amd64
As you can see, Update-golang script has installed Go version 1.16.2. This is the latest, stable Go version at the time of writing this guide. To print Go environment information, run:
$ go env
Sample output:

GO111MODULE=""
GOARCH="amd64"
GOBIN=""
GOCACHE="/home/ostechnix/.cache/go-build"
GOENV="/home/ostechnix/.config/go/env"
GOEXE=""
GOFLAGS=""
GOHOSTARCH="amd64"
GOHOSTOS="linux"
GOINSECURE=""
GOMODCACHE="/home/ostechnix/go/pkg/mod"
GONOPROXY=""
GONOSUMDB=""
GOOS="linux"
GOPATH="/home/ostechnix/go"
GOPRIVATE=""
GOPROXY="https://proxy.golang.org,direct"
GOROOT="/usr/local/go"
GOSUMDB="sum.golang.org"
GOTMPDIR=""
GOTOOLDIR="/usr/local/go/pkg/tool/linux_amd64"
GOVCS=""
GOVERSION="go1.16.2"
GCCGO="gccgo"
AR="ar"
CC="gcc"
CXX="g++"
CGO_ENABLED="1"
GOMOD="/dev/null"
CGO_CFLAGS="-g -O2"
CGO_CPPFLAGS=""
CGO_CXXFLAGS="-g -O2"
CGO_FFLAGS="-g -O2"
CGO_LDFLAGS="-g -O2"
PKG_CONFIG="pkg-config"
GOGCCFLAGS="-fPIC -m64 -pthread -fno-caret-diagnostics -Qunused-arguments -fmessage-length=0 -fdebug-prefix-map=/tmp/go-build883237217=/tmp/go-build -gno-record-gcc-switches"

Install Golang beta or release candidate (RC) version 


 By default, Update-golang script will install the latest stable version. If you want to install any beta or release candidate versions, explicitly mention the version like below: Install Golang beta:
$ sudo RELEASE=1.9beta1 ./update-golang.sh
Install release candidate (RC):
$ sudo RELEASE=1.11rc1 ./update-golang.sh
Golang per-user installation By default, Update-golang script installs Golang system-wide. If you want to install Golang for current user, simply create a installation directory, for example ~/golang:
$ mkdir ~/golang
And then install GO using command:
$ DESTINATION=~/golang PROFILED=~/.profile ./update-golang.sh
Please note that per-user installation does not need root or sudo permission. Prevent caching downloaded files As mentioned earlier, Update-golang script will keep the downloaded archives in /usr/local directory. If you don't want cache the archive files, simply use -declutter option:
$ sudo ./update-golang.sh -declutter
This time the installation files will not be cached. 

 Remove Golang


 To undo all steps done by Update-golang script, go to the cloned directory and run:
$ sudo ./update-golang.sh remove
This command will remove Go and all related entries from the $PATH.
update-golang.sh: version 0.24
update-golang.sh: find_latest: found last release: 1.16.2
update-golang.sh: remove: found symlink for old install: /usr/local/go1.16.2.linux-amd64
update-golang.sh: remove: removing symlink: /usr/local/go
update-golang.sh: remove: removing dir: /usr/local/go1.16.2.linux-amd64
update-golang.sh: profile_path_remove: removing old settings from: /etc/profile.d/golang_path.sh

Tuesday, May 17, 2022

Vidio: Apa yang baru di Flutter 3.0

 Pada gelaran Google I/O 2022 kemarin, Google merilis Flutter 3.0. Framework toolkit cross-platform ini akhirnya benar-benar menguasai 6 platform: platform Android, iOs, Desktop Windows, Desktop Linux, Desktop MacOS dan Flutter Web.

Simak ulasan kami berikut:



Monday, May 16, 2022

How to Create Drag n Drop File Upload in CodeIgniter 4

 On this simple tutorial, we gonna make a file upload with drag n drop features. We will using CodeIgniter 4 framework and Dropzone.js library.

Preparation

you're have running codeigniter 4 environment ready to used


Step 1. Enable CSRF in Codeigniter 4


Open .env file. Remove # from the start of the security.tokenName, security.headerName, security.cookieName, security.expires, and security.regenerate. Using security.tokenName read CSRF hash. You can update it with any other value.
# security.csrfProtection = 'cookie'
# security.tokenRandomize = false
security.tokenName = 'csrf_token_name'
security.headerName = 'X-CSRF-TOKEN'
security.cookieName = 'csrf_cookie_name'
security.expires = 7200
security.regenerate = true
# security.redirect = true
# security.samesite = 'Lax'
Open app/Config/Filters.php file. Uncomment in 'csrf' in 'before' if commented.
public $globals = [
    'before' => [
        // 'honeypot',
        'csrf',
        // 'invalidchars',
     ],
     'after' => [
        'toolbar',
        // 'honeypot',
        // 'secureheaders',
     ],
];
Step 2. Create new Route Open app/Config/Routes.php file. Define 2 routes – / – Display file upload view. page/fileUpload – It is used to upload a file.
$routes->get('/', 'PageController::index');
$routes->post('page/fileUpload', 'PageController::fileUpload');
Step 3. Create the Controller Create PageController Controller –
php spark make:controller PageController
Open app/Controllers/PageController.php file.
setRules([
         'file' => 'uploaded[file]|max_size[file,2048]|ext_in[file,jpeg,jpg,png,pdf],'
      ]);

      if ($validation->withRequest($this->request)->run() == FALSE){

          $data['success'] = 0;
          $data['error'] = $validation->getError('file');// Error response

      }else{

          if($file = $this->request->getFile('file')) {
             if ($file->isValid() && ! $file->hasMoved()) {
                // Get file name and extension
                $name = $file->getName();
                $ext = $file->getClientExtension();

                // Get random file name
                $newName = $file->getRandomName();

                // Store file in public/uploads/ folder
                $file->move('../public/uploads', $newName);

                // Response
                $data['success'] = 1;
                $data['message'] = 'Uploaded Successfully!';

             }else{
                // Response
                $data['success'] = 2;
                $data['message'] = 'File not uploaded.'; 
             }
          }else{
             // Response
             $data['success'] = 2;
             $data['message'] = 'File not uploaded.';
          }
      }
      return $this->response->setJSON($data);

   }

}
4. Create the View Create index.php file in app/Views/. and then Include Dropzone and jQuery library. You can download Dropzone from here or you can use CDN –


Create a hidden element to store CSRF token name specified in .env file in the name attribute and store CSRF hash in the value attribute.

Complete code:




   Drag and Drop file upload with Dropzone in CodeIgniter 4

   
   

   
   
   




    
   

   

Laravel Tutorial: How to Fetch Website Favicons

 On this laravel tutorial, we gonna create a favicon fetcher. This is our simple and straightforward solution to fetch the favicon from a website. We will be using Favicon Fetcher, an opensource library from here.

Before you start, you'll need to make sure that you've got an application running at least PHP 8.0 and Laravel 8.

You can install the package via Composer:

composer require ashallendesign/favicon-fetcher

You can then publish the package's config file using the following command:

php artisan vendor:publish --provider="AshAllenDesign\FaviconFetcher\FaviconFetcherProvider"

The package should now be installed and ready to use. You should also have a new config/favicon-fetcher.php config file.

Favicon Fetch method

To fetch a favicon from a website, you can use the fetch method which will return an instance of AshAllenDesign\FaviconFetcher\Favicon:

use AshAllenDesign\FaviconFetcher\Facades\Favicon;
 
$favicon = Favicon::fetch('https://apps.unnes.ac.id');

Storing Favicon

You can store a favicon using your default filesystem disk like so:

use AshAllenDesign\FaviconFetcher\Facades\Favicon;
 
$faviconPath = Favicon::fetch('https://apps.unnes.ac.id')->store('favicons');
 
// $faviconPath is now equal to: "/favicons/abc-123.ico"

Caching Favicon

If you have a page displaying 100 websites and their favicons, we would need to find the favicon's URL on each page load. So you need a caching mechanism. You can use this library.

use AshAllenDesign\FaviconFetcher\Facades\Favicon;
 
$faviconPath = Favicon::fetch('https://apps.unnes.ac.id')
    ->cache(now()->addDay());

Monday, April 18, 2022

ps command doesn't work in docker container

I want to do a ps command in a docker container derived from Debian official Docker hub repository:


$ docker run -ti debian:wheezy /bin/bash

root@51afd6b09af8:/# ps

bash: ps: command not found


alternative 1:

use docker top

docker top <container ID>


alternative 2 (but your container will be bloated):


ps is not installed in the base wheezy image. Try this from within the container:


apt-get update && apt-get install procps

or add the following line to the Dockerfile:

RUN apt-get update && apt-get install -y procps && rm -rf /var/lib/apt/lists/*

Tuesday, April 12, 2022

How to Install MXLinux 21.1 (AHS Desktop Edition)

 On this article, we gonna install MXLinux version 21.1 codename "wildflower". MX Linux, a desktop-oriented Linux distribution based on Debian's "Stable" branch, is a cooperative venture between the antiX and former MEPIS Linux communities. Using Xfce as the default desktop (with separate KDE Plasma and Fluxbox editions also available), it is a mid-weight operating system designed to combine an elegant and efficient desktop with simple configuration, high stability, solid performance and medium-sized footprint.

MXLinux currently sit on No. 1 as The Most Popular Linux Distribution by Distrowatch. This distribution is crafted beutifully and packed with top-quality in-house software called 'MX-Tool'.

Monday, April 4, 2022

Flutter Tutorial: How to Add Firebase to Flutter Project (2022 Update)

In this article, we will discuss how to add Firebase in our flutter based application.

Create and Prepare the Firebase Project

  • Go to Google Firebase and create a project. You will need a Gmail E-Mail to access Firebase.
  • Navigate to the console page of Firebase. Create a new project by clicking on add project.
  • After clicking the button you will be take to a new page. The project creation has two steps.
  • Give your project a name
  • Add Firebase Analytics to your project. I recommend disabling this option unless you really need it.
  • Finish the creation of your project by clicking *Create Project*

After creating your project you will be taken to the project overview. Unlike in previous times when adding Firebase to Flutter you are done inside the Firebase console now.

We also need firebase-cli installed on our computer. So for those who have not installed firebase-cli, please install it first according to their respective OS.

Insert Firebase to Flutter Project

Create a Flutter project or use your desired project. To add the Firebase Core Package to your pubscpec run this command:

flutter pub add firebase_core 

Also run the following three commands

dart pub global activate flutterfire_cli 
//In case you get an error or warning after command 1: export 
PATH=”$PATH”:”$HOME/.pub-cache/bin”
flutterfire configure

If you have done everything correctly the following file will be created: firebase_options.dart. Import those file inside your main.dart by adding this line:

import ‘firebase_options.dart’;

and add this syntax to add firebase function

  void main() async { 
    WidgetsFlutterBinding.ensureInitialized(); await 
    Firebase.initializeApp( options: 
      DefaultFirebaseOptions.currentPlatform, ); runApp(const MyApp());
}
That’s it. Your Firebase has been added.

Flutter Tutorial: Save GPS Data from the Devices

In this article we will cover how to collect the value of the speed of a vehicle through GPS. We will use as a basis for this project the Flutter framework that has been widely used by several developers.

We will cover the following topics:

  • Creating a Standard Project with Flutter
  • Installing and configuring the “geolocator: ^8.2.0” plugin
  • Save the speed data as the device moves.

Step 1. Creating a Standard Project with Flutter

flutter create -i objc -a java my_speed

Step 2. Install & Configure Geolocator Plugin

How to Customize Flutter Stop Error Screen

 

In this short article, we will replace the message on the Stop Error display when developing in Flutter.

As we know, the default display when experiencing a stop error is like this.



To do this customization, please add accent parameters such as style, align, etc. with the following example:

void main() {
  ErrorWidget.builder = (FlutterErrorDetails details) => Material(
    child: Container(
      padding: const EdgeInsets.symmetric(vertical: 40.0, horizontal: 20.0),
      child: Center(
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          mainAxisSize: MainAxisSize.min,
          children: [
			//customize your stop error message here
         
             const Text(
              'Error',
              textAlign: TextAlign.center,
              style: TextStyle(
                color: Colors.redAccent,
                fontSize: 24,
                fontWeight: FontWeight.bold,
              ),
            ),
            const SizedBox(height: 20),
            Text(
              details.exceptionAsString(),
              textAlign: TextAlign.justify,
              style: const TextStyle(
                color: Colors.red,
                fontSize: 18,
                fontWeight: FontWeight.normal,
              ),
            ),
          ],
        ),
      ),
    ),
  );
 runApp(MyApp());
}
and if you try to catch an error, you got this different stop error message:

What is StatefulBuilder Widget in Flutter?

 In this article we will discuss about the StatefulBuilder widget. A platonic widget that both has state and calls a closure to obtain its child widget.

The StateSetter function passed to the builder is used to invoke a rebuild instead of a typical State's State.setState.

Since the builder is re-invoked when the StateSetter is called, any variables that represent the state should be kept outside the builder function.

For more explanation, please see the video below:



Flutter Tutorial: Flutter Database for Dart-native Objects with Objectsbox



ObjectsBox is a super-fast Flutter database for storing and syncing Dart objects.
  • High performance - improving response rates and enabling real-time applications.
  • ACID compliant - Atomic, Consistent, Isolated, Durable.
  • Multiplatform - Android, iOS, macOS, Linux, Windows.
  • Scalable - grows with your app, handling millions of objects with ease.
  • Relations - object links / relationships are built-in.
  • Queries - filter data as needed, even across relations.
  • Statically typed - compile time checks & optimizations.
  • Schema migration - change your model with confidence.
  • Data Sync - keeps data in sync offline or online, between devices and servers.
ObjectsBox example code:

Flutter Tutorial: Create Speech to Text

 On this tutorial, we will learn to create a speech to text apps using Flutter. Just like other TTS, spech to text a very helpful and unique feature that can you add to your apps.

Step 1. Add dependencies
dependencies:
  flutter:
    sdk: flutter


  # The following adds the Cupertino Icons font to your application.
  # Use the CupertinoIcons class for iOS style icons.
  cupertino_icons: ^1.0.2
  speech_to_text:

and import this packages

Flutter Tutorial: Create Network Service Library for Better API Call in Flutter

 In this tutorial we will create a library function in flutter to provide easy API connection. Our function will use a better known flutter packages like HTTP and DIO. 

Our goals is create a network services that:

✅ Has No duplicate code 

✅ Has Not blocking main thread and dropping FPS

 ✅ Has No error-proof codebase 

✅ Has Minimised time on adding new services and API calls 

✅ Has Structured and strongly-typed error handling

Example code:

class NetworkService {
  NetworkService({
    required this.baseUrl,
    dioClient,
    httpHeaders,
  })  : this._dio = dioClient,
        this._headers = httpHeaders ?? {};
  Dio? _dio;
  final String baseUrl;
  Map _headers;
  Future _getDefaultDioClient() async {
    _headers['content-type'] = 'application/json; charset=utf-8';
    final dio = Dio()
      ..options.baseUrl = baseUrl
      ..options.headers = _headers
      ..options.connectTimeout = 5000 // 5 seconds
      ..options.receiveTimeout = 3000; // 3 seconds
      
    }
    return dio;
  }
  void addBasicAuth(String accessToken) {
    _headers['Authorization'] = 'Bearer $accessToken';
  }
  Future> execute(
    NetworkRequest request,
    Model Function(Map) parser, {
    ProgressCallback? onSendProgress = null,
    ProgressCallback? onReceiveProgress = null,
  }) async {
    if (_dio == null) {
      _dio = await _getDefaultDioClient();
    }
    final req = _PreparedNetworkRequest(
      request,
      parser,
      _dio!,
      {..._headers, ...(request.headers ?? {})},
      onSendProgress,
      onReceiveProgress,
    );
    final result = await compute(
      executeRequest,
      req,
    );
    return result;
  }
}

The History of Flutter

 The first version of Flutter was known as "Sky" and ran on the Android operating system. It was unveiled at the 2015 Dart developer summit with the stated intent of being able to render consistently at 120 frames per second.

During the keynote of Google Developer Days in Shanghai in September 2018, Google announced Flutter Release Preview 2, the last major release before Flutter 1.0. On December 4th of that year, Flutter 1.0 was released at the Flutter Live event, denoting the first stable version of the framework. 

On December 11, 2019, Flutter 1.12 was released at the Flutter Interactive event. On May 6, 2020, the Dart software development kit (SDK) version 2.8 and Flutter 1.17.0 were released, adding support for the Metal API which improves performance on iOS devices by approximately 50%, as well as new Material widgets and network tracking development tools. 

On March 3, 2021, Google released Flutter 2 during an online Flutter Engage event. This major update brought official support for web-based applications with a new CanvasKit renderer and web specific widgets, early-access desktop application support for Windows, macOS, and Linux and improved Add-to-App APIs.

 This release also utilized Dart 2.0 that featured sound null-safety, which caused many breaking changes and issues with many external packages; however, the Flutter team included instructions and tools to mitigate these issues.[12] On September 8th, 2021, Dart 2.14 and Flutter 2.5 were released by Google. The update brought improvements to the Android full-screen mode and the latest version of Google's Material Design called Material You. Dart received two new updates, standardizing lint conditions and marking support for Apple Silicon as stable. The current stable channel of Flutter is 2.16.1 and the Dart version is 2.16.1.

Better Tips to Developed/Released a Flutter App in a Day



Can you create the Flutter app with beautiful animations in 24 hours? And this is our tips you can try to boost your workflow. 

 1. Set the game plan 

 You have to plan everything as in before, that means todo/task list arranged in a sensible order, architecture, plugins that I want to use and even mockups already in place, so the only job left was coding and publishing in those 24 hours. 

Sunday, March 27, 2022

Gagal Masuk Ke OnlyFans, Padahal User dan Password Benar

 Dalam salah satu halaman supportnya, OnlyFans menjawab jika kalian gagal login ke OnlyFans padahal username dan password sudah benar, maka:

Harap periksa email Anda untuk melihat apakah akun Anda telah ditandai sebagai mencurigakan atau dibatasi. Jika Anda memiliki pelanggaran Persyaratan Layanan, akun Anda mungkin ditutup. Jika Anda memiliki akun sebelumnya di OnlyFans dengan pelanggaran, akun baru Anda mungkin dibatasi atau ditutup. Jika Anda yakin telah salah ditandai, silakan hubungi dukungan (support@onlyfans.com) dengan bukti atau informasi yang memungkinkan kami meninjau situasi Anda.



Saturday, March 26, 2022

Cara Menemukan Seseorang di OnlyFans

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Namun, Anda masih dapat menemukan profil siapa pun, berkat beberapa solusi.

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Cara Berlangganan ke Akun OnlyFans

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Wednesday, March 23, 2022

What is .htaccess File for?

An .htaccess file is a part of what controls the high-level configuration of your website. You edit the contents of your .htaccess file to enable and disable certain features of your server software without editing in the server configuration file directly. It’s a pretty easy way to make important changes, but you have to be really careful that you’re editing the code correctly. One mistake in your code can cause a lot of problems for users.

What is 301 Permanent Redirect?

A 301 redirect is a permanent redirect. When a user tries to access an old URL, the server sends their browser the 301-Permanently Moved status code and sends them to another page. This is useful for site owners and users because it means they are directed to the next most relevant page.

Are you looking for Linux Distribution for Apple Silicon? Meet: Asahi Linux

Asahi Linux is a project and community with the goal of porting Linux to Apple Silicon Macs, starting with the 2020 M1 Mac Mini, MacBook Air, and MacBook Pro. Apple silicon is a series of system on a chip (SoC) and system in a package (SiP) processors designed by Apple Inc., mainly using the ARM architecture.

Asahi Linux goal is not just to make Linux run on these machines but to polish it to the point where it can be used as a daily OS. Doing this requires a tremendous amount of work, as Apple Silicon is an entirely undocumented platform. In particular, we will be reverse engineering the Apple GPU architecture and developing an open-source driver for it.

Sunday, March 13, 2022

Golang REST API Tutorial (Part I)

On this series, we gonna build the REST API with Golang. As a basis, we'll be using Goyave.  Goyave is an opinionated Golang REST API framework aiming at cleanliness, fast development and power. Goyave applications stay clean and concise thanks to minimalist function calls and route handlers. The framework gives you all the tools to create an easily readable and maintainable web applications, which let you concentrate on the business logic. Although Goyave is a full package requiring very few setup and that handles many things for you, such as headers or marshaling, this characteristic doesn't compromise on your freedom of code.

You can read more about goyave framework from here: https://goyave.dev/

As an example, we'll be build blog API. The requirements is:

  • Go 1.16+
  • Go modules

the directory structure

.
├── database
│   ├── model                // ORM models
│   |   └── ...
│   └── seeder               // Generators for database testing
│       └── ...
├── http
│   ├── controller           // Business logic of the application
│   │   └── ...
│   ├── middleware           // Logic executed before or after controllers
│   │   └── ...
│   ├── validation
│   │   └── validation.go    // Custom validation rules
│   └── route
│       └── route.go         // Routes definition
│
├── resources
│   └── lang
│       └── en-US            // Overrides to the default language lines
│           ├── fields.json
│           ├── locale.json
│           └── rules.json
│
├── test                     // Functional tests
|   └── ...
|
├── .gitignore
├── .golangci.yml            // Settings for the Golangci-lint linter
├── config.example.json      // Example config for local development
├── config.test.json         // Config file used for tests
├── go.mod
└── main.go                  // Application entrypoint
Running the project 

First, make your own configuration for your local environment. You can copy config.example.json to config.json. 
 Run go run main.go in your project's directory to start the server.

Friday, March 11, 2022

How to fix zsh: command not found: php Error in MacOS Monterey

I have been using php with mamp on mac for a year even with old versions of MacOS, since I installed MacOS Monterrey if I type php on the terminal I get a message: zsh: command not found: php. After some googling, I find out MacOS doesn't include PHP. You need Homebrew to install PHP again.
brew install php

Thursday, March 10, 2022

How to Synchronize Multiple Linux Server with lsyncd

Lsyncd is a free, open-source utility that can be downloaded and configured with no charge for the software or use.

Modern sysadmins use lsyncd for several scenarios such as:
- Load balancing — this works best when the traffic levels are relatively low (or intermittent), or new and modified content is not frequently accessed.
- High availability — keeping in mind that there are multiple aspects of high availability. Using lsyncd to push data to another host that can take over in the event of a hardware failure is an excellent use-case.
- Real-time offsite backups — a great way to keep a running record of the files and folders that have changed will ensure we push the changes to a second host for backup purposes.

Install EPEL Repo

The first step is to add the EPEL repository which contains the lsyncd package.
root@server ~]# yum -y install epel-release
If everything goes well, you will see a “Complete!” message. Then you need to make sure the EPEL repo is enabled. Open the epel.repo file as follows:
[root@server ~]# vi /etc/yum.repos.d/epel.repo
Change the “enabled=0” to “enabled=1” as follows:
[epel] name=Extra Packages for Enterprise Linux 7 - $basearch #baseurl=http://download.fedoraproject.org/pub/epel/7/$basearch metalink=https://mirrors.fedoraproject.org/metalink?repo=epel-7&arch=$basearch
failovermethod=priority
enabled=1
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-EPEL-7

Install Lsyncd

Proceed to install the lsyncd package using the following command:
[root@server ~]# yum -y install lsyncd

Configure SSH on Master

At this point we need to configure SSH on Master server so that it can push files to the slave/backup server without requiring password authentication or user intervention. To do so, we will create SSH keys on the master server as follows:
[root@server ~] # ssh-keygen -t rsa
Upon execution of the command above you will be prompted with several questions. You can use the defaults. When prompted to enter passphrase, hit Enter to proceed with empty passphrase.
root@alt [~]# ssh-keygen -t rsa -C "email@domain.local"
Once the SSH keys are generated, transfer the public key (the file ending with .pub) to the slave server. In this way, master server will authenticate with the slave without the need for password. Transfer the ssh key with the following command:
[root@server ~]# ssh-copy-id email@domain.local
NOTE: It is normal if when using the above command you are prompted to authenticate via password. This is because the SSH key is not yet in place.
Before proceeding to the next step, verify that the passwordless authentication works. From the master server, try to ssh to the slave server as follows:
[root@server ~]# ssh email@domain.local

Configure Lsyncd on Master

We are ready to configure the Lsyncd on Master server. The settings we will modify are the following:
- Log files location
- Frequency to write status file
- Synchronization method
- Source folder (in master) we wish to sync
- Destination folder (in slave)
Firstly, open the lsyncd.conf file to start editing it.
root@server [~]# vi /etc/lsyncd.conf
settings {
logfile = "/var/log/lsyncd/lsyncd.log",
statusFile = "/var/log/lsyncd/lsyncd-status.log",
statusInterval = 10
}
## Slave server configuration ##
sync {
default.rsync,
source="/var/www/html/",
target="IP:/var/www/html/",
rsync = {
compress = true,
acls = true,
verbose = true,
owner = true,
group = true,
perms = true,
rsh = "/usr/bin/ssh -p 22 -o StrictHostKeyChecking=no"
}
}
Now that Lsyncd is installed and configured, along with the SSH keys for password-less authentication, execute the following commands to start and enable the lsyncd service.
[root@server lsyncd]# systemctl start lsyncd
[root@server lsyncd]# systemctl enable lsyncd
Created symlink from /etc/systemd/system/multi-user.target.wants/lsyncd.service to /usr/lib/systemd/system/lsyncd.service

Verify Lsyncd is Working

Check both your master and slave directories (/var/www/html/) are empty.
[root@server ~]# cd /var/www/html
[root@server html]# ls -luah
total 0
[root@server html]#
[root@slave-server ~]# cd /var/www/html
[root@slave-server html]# ls -luah
total 0
[root@slave-server html]#
Create an empty file on the master server named index.html. You can quickly do so by using the touch command as follows:
[root@server html]# touch index.html
After 15 seconds, lsyncd will notice the changes and push the new file to the slave server. We can monitor the lsyncd log on the master server to verify the transfer has occurred, and what files were transferred across.
[root@server ~]# cd /var/log/lsyncd
[root@server lsyncd]# cat lsyncd.log
Tue Feb 22 09:02:18 2022 Normal: Rsyncing list
/
/index.html
Tue Feb 22 09:02:20 2022 Normal: Finished (list): 0
[root@server lsyncd]#
Now, check the /var/www/html/ directory on the slave server to confirm the new index.html file has been pushed successfully.
[root@slave-server ~]# ls -luah /var/www/html
total 1
-rw-r--r-- 1 root root 10 Feb 22 09:04 index.html
[root@slave-server ~]#

How to Fix CentOS 8 Error: ‘appstream’: Cannot prepare internal mirrorlist

If you got the error message is: Failed to download metadata for repo:
[root@autocontroller ~]# yum update
CentOS-8 - AppStream 70 B/s | 38 B 00:00
Error: Failed to download metadata for repo 'AppStream': Cannot prepare internal mirrorlist: No URLs in mirrorlist
CentOS Linux 8 had reached the End Of Life (EOL) on December 31st, 2021. that’s means CentOS 8 will no longer receive development resources from the official CentOS project. After Dec 31st, 2021, if you need to update your CentOS, you need to change the mirrors to vault.centos.org where they will be archived permanently.

So just follow the steps below to do that: Go to the /etc/yum.repos.d/ directory.
cd /etc/yum.repos.d/
Run the below commands to hash the mirror-list in all yum.repos.d files then replace the existed Baseurl with the vault.centos.org
sed -i 's/mirrorlist/#mirrorlist/g' /etc/yum.repos.d/CentOS-*
sed -i 's|#baseurl=http://mirror.centos.org|baseurl=http://vault.centos.org|g' /etc/yum.repos.d/CentOS-*
Then run yum update or install any package you want
yum update -y
Thank you...

How to Install Firefox 98 on Ubuntu 22.04

This tutorial will be helpful for beginners to download and install Firefox 98.0 on Ubuntu 20.04 LTS, Ubuntu 22.04.
Firefox or Mozilla Firefox is a free and open-source web browser developed by the Mozilla foundation and generally utilized by thousands and thousands of individuals in their daily actions. It is a Cross-platform web browser available for Android, Windows, macOS, iOS, and Linux systems.
Firefox 98.0 Changelog
- You can now delete downloaded files directly from the download panel and other download views using the context menu. - The use of webRequest used to cause addons to start early during Firefox startup. This has changed to only use webRequest blocking calls. non-blocking calls no longer cause an early startup for addons. - The HTML element already available on pre-release channels will become available on the release channel in version 98. For the complete changelog refer to the release notes

Install Firefox 98.0 on Ubuntu / Linux Mint

The latest version of Firefox 98.0 will be updated to the repositories, just update the repository and install it using the below command
sudo apt update && sudo apt install firefox
Thank you!

How to Create Docker Swarm with Multipass & Virtualbox

On this tutorial, we're gonna creating a docker swarm with tool called 'multipass'. You can install this tool (either in Mac or Linux) easly with brew install multipass. Another software required is Virtualbox.
To install multipass in macOS, you can follow my tutorial here: https://blog.emka.web.id/2022/03/how-to-install-multipass-on-macos.html.
for this little experiment, you will create a minimal setup of Docker Swarm, as per my understanding one manager and two worker nodes will be sufficient along with one server for NFS shared storage.
$ multipass launch -n manager 
$ multipass launch -n worker1 
$ multipass launch -n worker2 
$ multipass launch -n nfsserver
running above commands with defaults, created required VMs for this POC.
$ multipass list 
Name                    State             IPv4             Image manager                 Running           10.100.1.5     Ubuntu 20.04 LTS 
nfsserver               Running           10.100.1.4     Ubuntu 20.04 LTS 
worker1                 Running           10.100.1.6     Ubuntu 20.04 LTS 
worker2                 Running           10.100.1.7     Ubuntu 20.04 LTS  
Install Docker CE in manager and worker nodes is pretty straight forward, run below scripts as root user
$ apt-get update && apt-get upgrade -y 
$ apt-get remove docker docker-engine -y 
$ apt-get install apt-transport-https ca-certificates curl gnupg2 software-properties-common python-setuptools -y 
$ curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add - 
$ add-apt-repository "deb [arch=amd64] https://download.docker.com/linux/ubuntu $(lsb_release -cs) stable" $ apt-get update 
$ apt-get install docker-ce -y 
$ systemctl enable docker 
$ systemctl restart docker 
$ apt install python3-pip -y 
$ pip install docker-compose 
$ usermod -aG docker ubuntu
Login to manager, worker1 and worker2 shell and verify if docker is properly installed, by executing below command from each VM.
docker --version Docker version 20.10.8, build 3967b7d

Initialize docker manager instance
$ docker swarm init --advertise-addr 10.100.1.5
run join command from each worker VM
$ docker swarm join --token  10.100.1.5:2377
check if the setup is working as expected
$ docker node ls 
ID                            HOSTNAME   STATUS    AVAILABILITY   MANAGER STATUS   ENGINE VERSION 
jklhgjfturtaiuskghmv *   manager    Ready     Active         Leader           20.10.8 
jkhgutyikjhgmnjghmvn     worker1    Ready     Active                          20.10.8 
cfgrtdyfhgvncfghggvh     worker2    Ready     Active                          20.10.8
try installing an nginx web server in this cluster and verify if container deployment is working as expected
$ docker service create --name my-web --publish 8080:80 --replicas 2 nginx 
$ docker service ls ID             NAME      MODE         REPLICAS   IMAGE          PORTS s9eabxqjgu98   my-web    replicated   2/2        nginx:latest   *:8080->80/tcp
above command deploys nginx webserver with 2 replicas, check where these 2 containers are deployed to
ubuntu@manager:~$ docker service ps my-web ID             NAME       IMAGE          NODE      DESIRED STATE   CURRENT STATE            ERROR     PORTS 
jghasgghjda   my-web.1   nginx:latest   worker2   Running         Running 48 seconds ago 
fdreytfghca   my-web.2   nginx:latest   manager   Running         Running 56 seconds ago
enjoy it!

How to Install multipass on MacOS Monterey

The default backend on macOS is hyperkit, wrapping Apple’s Hypervisor.framework. You need macOS Yosemite, version 10.10.3 or later installed on a 2010 or newer Mac.

Multipass also supports using VirtualBox as a virtualization provider. You can download the latest version and check the requirements on the VirtualBox website.

sudo multipass set local.driver=virtualbox

Installing Multipass

To install Multipass on macOS, you have two options: the installer package or brew:

Download the latest installer from our GitHub releases page - it’s the .pkg package. If you want Tab completion on the command line, install bash-completion from brew first. Activate the downloaded installer and it will guide you through the steps necessary. You will need an account with Administrator privileges to complete the installation. Multipass installer on macOS There’s a script to uninstall:
sudo sh "/Library/Application Support/com.canonical.multipass/uninstall.sh"
Brew Have a look at brew.sh on instructions to install Brew itself. Then, it’s a simple:
brew install --cask multipass
To uninstall:
$ brew uninstall multipass
# or
$ brew uninstall --zap multipass # to destroy all data, too

Running multipass for the first time

Once installed, open the Terminal app and you can use multipass launch to create your first instance. With multipass version you can check which version you have running:
$ multipass version
multipass 1.0.0+mac
multipassd 1.0.0+mac

Wednesday, March 9, 2022

How to Limit Firefox/Google Chrome CPU and RAM

Google Chrome and Firefox web browsers make extensive use of Memory and CPU utilization when multiple tabs are opened. We can limit the CPU and RAM for those browser, or other application by using systemd.

Using systemd’s transient scope units one can allocate a certain amount of memory and CPU shares to Firefox and chrome web-browser applications. systemd’s transient Units are only allowed for a super user(root) hence the need is to first allow the user or group that wants this feature.

Add the following polkit rule in /etc/polkit-1/rules.d/60-systemd-manage.rules file. The following rule makes sure that the user ‘test’ is allowed to start systdmd Units. Change the username of your choice.
polkit.addRule(function(action, subject) {
    if (action.id == "org.freedesktop.systemd1.manage-units" &&
        subject.user == "test") {
            return polkit.Result.YES;
    }
});
Alternatively, a group of users can be granted the same privileges through the same rule with just a little modification. Make sure the user is part of the ‘admin’ group.
polkit.addRule(function(action, subject) {
    if (action.id == "org.freedesktop.systemd1.manage-units" &&
        subject.isInGroup("admin")) {
            return polkit.Result.YES;
    }
});
Now login to the test user account and validate if the user can start and stop systemd services.
$ systemctl restart sshd
  [test@localhost ~]$ systemd-run --scope sleep 30
    Running scope as unit run-2845.scope.
Now modify the Gnome Launcher file of firefox or chrome from /usr/share/applications directory. Modify the Exec parameter as below to set 5G Memory limit and give 200 CPU cycles limit for to firefox and chrome. Generally 1024 CPU cycles is equivalent to 1 CPU. Giving 2048 CPU cycles would allow chrome and Firefox to use two CPUs if required.

Firefox: /usr/share/applications/firefox.desktop
From:
Exec=/home/test/firefox/firefox %u

To:
Exec=systemd-run --scope -p CPUShares=200 -p MemoryLimit=5G /home/test/firefox/firefox %u
Chrome: /usr/share/applications/google-chrome.desktop From:
#Exec=/usr/bin/google-chrome-stable %U
To:
Exec=systemd-run --scope -p CPUShares=200 -p MemoryLimit=5G /usr/bin/google-chrome-stable %U
Exec=systemd-run --scope -p CPUShares=200 -p MemoryLimit=5G /usr/bin/google-chrome-stable
Exec=systemd-run --scope -p CPUShares=200 -p MemoryLimit=5G /usr/bin/google-chrome-stable --incognito
Now logout from the desktop session and then re-login to validate the feature.

How to Configure Gitlab & Docker Dind as CI/CD Platform

On this tutorial, we will using gitlab as CICD platform. And, we are also using docker dind.
First Install repository. Update apt package.
$ sudo apt-get update
$ sudo apt-get install \
    ca-certificates \
    curl \
    gnupg \
    lsb-release
2. Add docker’s GPG key.
$ curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo gpg --dearmor -o /usr/share/keyrings/docker-archive-keyring.gpg
3. Set up stable docker repository.
$ echo \
  "deb [arch=$(dpkg --print-architecture) signed-by=/usr/share/keyrings/docker-archive-keyring.gpg] https://download.docker.com/linux/ubuntu \
  $(lsb_release -cs) stable" | sudo tee /etc/apt/sources.list.d/docker.list > /dev/null

Install docker engine

Update apt package and install docker engine.
$ sudo apt-get update
$ sudo apt-get install docker-ce docker-ce-cli containerd.io
2. Config docker start on boot.
$ sudo systemctl enable docker.service
$ sudo systemctl enable containerd.service
Config docker access remote
Open docker.sevice with editor.
$ sudo systemctl edit docker.service
2. Place this below code value in docker.service.
[Service]
ExecStart=
ExecStart=/usr/bin/dockerd -H fd:// -H tcp://127.0.0.1:2375
3. Save file
4. Reload systemctl configuration.
5. Restart docker.
$ sudo systemctl restart docker.service
6. Check docker configuration with ss confirm dockerd listening port.
$ sudo ss -lntp | grep dockerd

Install gitlab runner

1. Download the binary for your system.
$ sudo curl -L — output /usr/local/bin/gitlab-runner https://gitlab-runner-downloads.s3.amazonaws.com/latest/binaries/gitlab-runner-linux-amd64
2. Give it permission to execute.
$ sudo chmod +x /usr/local/bin/gitlab-runner
3. Create a GitLab Runner user.
$ sudo useradd — comment ‘GitLab Runner’ — create-home gitlab-runner — shell /bin/bash
4. Install and run as a service.
$ sudo gitlab-runner install — user=gitlab-runner — working-directory=/home/gitlab-runner
sudo gitlab-runner start
5. Register runner.
$ sudo gitlab-runner register --url https://gitlab.com/ --registration-token $REGISTRATION_TOKEN

Config gitlab runner

Config /etc/gitlab-runner/config.toml
$ sudo nano /etc/gitlab-runner/config.toml
2. Add this below line for each runner in [runner.docker]
volumes = ["/cache", "/var/run/docker.sock:/var/run/docker.sock"]
network_mode = "host"
And thats all folks! try with your own responsibility.

How to use Rstudio with multiple versions of R

Installing R and maintaining its the different versions are too much complicated. Almost everytime you install, Rstudio will downgrade your R versions and causes more problems than solutions.

And this is a simple solution for you:

#1. Install Conda

wget https://repo.anaconda.com/miniconda/Miniconda3-latest-Linux-x86_64.sh -O miniconda.sh \
&& chmod +x miniconda.sh && bash miniconda.sh -b -p miniconda

base_dir=$(echo $PWD)

export PATH=$base_dir/miniconda/bin:$PATH
source ~/.bashrc
echo -e "$base_dir/miniconda/etc/profile.d/conda.sh" >> ~/.profileconda init bash

#2. Install Mamba

conda install mamba -n base -c conda-forge -y
conda update conda -y
conda update --all
conda config --add channels defaults
conda config --add channels bioconda
conda config --add channels conda-forge

#3. Install R

mamba create -n R -c conda-forge r-base -y
conda activate R
mamba install -c conda-forge r-essentials

#4. Install gdebi

To install GDebi on your Ubuntu machine, run the following command:

sudo apt-get install gdebi

#5. Install Rstudio

For Ubuntu, download the Rstudio *.deb package from the official Rstudio website. Download respectively for other Operating Systems.

Use gdebi to install the deb package, The gdebi command will ensure that all additional prerequisites are also downloaded to fulfil the RStudio requirements:

sudo gdebi rstudio-1.2.5019-amd64.deb

#6 Running Rstudio

Use your desktop menu to start the RStudio application or you can start the application by executing the below command : rstudio.

But that’s not why we did all this. We want different versions of R in Rstudio. For that run the following command in a terminal:

conda activate R

This will activate the installed conda R, now enter the command:

rstudio
This will make rstudio use the conda installed R.

How to Install Laravel in Ubuntu 22.04

 On this tutorial, we will install Laravel 9 in Ubuntu 22.04. Basically, you can replicate all of this step in many version and flavors of Ubuntu (like Kubuntu, Xubuntu, etc) and also all Debian-based distribution with binary compatibility version by Ubuntu.

We will utilize Composer as a dependency manager and package installer for PHP.
If you don't have composer installed, you can install it as easy as copy this script:

sudo apt install composer

or you can install completly bleding edge with the latest version:

sudo apt update
sudo apt install php8.0 php8.0-mbstring php8.0-xml php8.0-zip curl
curl -s https://getcomposer.org/installer | php
mv composer.phar /usr/local/bin/composer
chmod +x /usr/local/bin/composer

to install Laravel globally, you can type this command:

composer global require laravel/installer

the last step, add Laravel to bash environment.

nano ~/.bashrc
export PATH="$PATH:$HOME/.config/composer/vendor/bin"
source ~/.bashrc

And it's done, you can test by type laravel command

laravel

Tuesday, March 8, 2022

How to Install Database Replicator (ReplicaDB) on Debian 10/11

1. Install Java we can use OpenJDK 11. install it with: sudo apt install openjdk-11-jre openjdk-11-jdk export JAVA_HOME variable to bashrc: export JAVA_HOME=$(dirname $(dirname $(readlink -f $(which java)))) export PATH=$PATH:$JAVA_HOME/bin 2. Download ReplicaDB tool from Github wget https://github.com/osalvador/ReplicaDB/releases/download/v0.11.4/ReplicaDB-0.11.4.tar.gz extract it to /opt/replicadb tar -xzvf ReplicaDB*.tar.gz -C /opt/replicadb create symlink for the replicadb binary: ln -s /opt/replicadb/bin/replicadb /usr/local/bin/replicadb 3. Test replicadb --version

How to Install Certbot in CentOS 8 with Snapd

You can use Let's Encrypt to make your site more secure for free. To create a SSL we can use certbot. In CentOS or other linux distribution, we can install certbot with easy as is snap a finger, by installing snap.

Snaps are applications packaged with all their dependencies to run on all popular Linux distributions from a single build. They update automatically and roll back gracefully.

Snap is available for CentOS 7.6+, and Red Hat Enterprise Linux 7.6+, from the Extra Packages for Enterprise Linux (EPEL) repository. The EPEL repository can be added to your system with the following command:
sudo yum install epel-release
Snap can now be installed as follows:
sudo yum install snapd
Once installed, the systemd unit that manages the main snap communication socket needs to be enabled:
sudo systemctl enable --now snapd.socket
To enable classic snap support, enter the following to create a symbolic link between /var/lib/snapd/snap and /snap:
sudo ln -s /var/lib/snapd/snap /snap
Either log out and back in again, or restart your system, to ensure snap’s paths are updated correctly.

Install certbot 

 To install certbot, simply use the following command:
sudo snap install certbot --classic

How to Solve CentOS Error: 'AppStream': Cannot prepare internal mirrorlist: No URLs in mirrorlist

CentOS Linux 8 had reached the End Of Life (EOL) on December 31st, 2021. It means that CentOS 8 will no longer receive development resources from the official CentOS project. After Dec 31st, 2021, if you need to update your CentOS, you need to change the mirrors to vault.centos.org where they will be archived permanently. Alternatively, you may want to upgrade to CentOS Stream.

Do with your own consequnces!

Step 1: Go to the /etc/yum.repos.d/ directory.

[root@autocontroller ~]# cd /etc/yum.repos.d/

Step 2: Run the below commands

[root@autocontroller ~]# sed -i 's/mirrorlist/#mirrorlist/g' /etc/yum.repos.d/CentOS-*
[root@autocontroller ~]# sed -i 's|#baseurl=http://mirror.centos.org|baseurl=http://vault.centos.org|g' /etc/yum.repos.d/CentOS-*

Step 3: Now run the yum update

[root@autocontroller ~]# yum update -y

That’s it!

Sunday, February 27, 2022

Ubuntu 20.04.4 LTS Version is Released. Download and Try Now

Ubuntu 20.04.4 LTS is a newly-spun installer image that contains all core security patches, bug fixes, and app updates released to Ubuntu 20.04 since the release of Ubuntu 20.04.3 LTS back in August of last year.

Linux 5.13 is the big lure of this point release, carried over from October’s Ubuntu 21.10 release. Linux 5.13 introduces a bunch of tweaks including better EXT4 support, a new cooling driver for modern Intel CPUs, and better support for peripherals including the Apple Magic Mouse 2 and the GK6X mechanical keyboard.


Other updates bundled with the new ISO include GNOME Shell 3.36.8, LibreOffice 6.4.7.2, and Mozilla Firefox 97.

Ubuntu 20.04.4 LTS is available to download from the Ubuntu website, right now — though as it’s a 3.1GB download make sure you’re not on a capped connection when you do it.


Will Be Separated: Adsense for Youtube & Homepage Payment Page

 

Starting in March 2022 and rolling out over the next few months, YouTube earnings will have a separate homepage and payments account in AdSense. Learn more about this change below.

What's new

The AdSense experience for YouTube creators is improving. Starting in March 2022 and rolling out over the next few months, YouTube will have a dedicated AdSense for YouTube homepage in AdSense. It allows creators even quicker access to their finalized YouTube earnings in AdSense.

In addition, payments for YouTube earnings will be separated into its own payments account. This means the YouTube and AdSense payments accounts will have separate payment threshold amounts. That’s important to understand if you use AdSense to get paid for more than just YouTube, as it could affect payment timing.

Any unpaid YouTube earnings will be moved into that new payments account. The details of your previously paid YouTube earnings and any other AdSense earnings will remain associated with your AdSense payments account.

How to see it

Currently the new homepage is only accessible to a small number of creators while it’s being rolled out in 2022. Until roll out completes, finalized YouTube earnings are still visible to YouTube creators in their AdSense payments account.

Once rolled out fully, you’ll land on the new AdSense for YouTube homepage by navigating to AdSense from within YouTube Studio. You can also see it at the top of the left-hand menu in AdSense.