How to install Rundeck on centos 8 - YallaLabs

Rundeck is an open-source software Job scheduler and Run Book Automation system for automating routine processes across development and production environments. It combines task scheduling, multi-node command execution, workflow orchestration and logs everything that happens.

In this quick tutorial, we are going to show you how to install and configure Rundeck server on centOS 8 using mySQL as database. Rundeck requires java 8 to run, so follow this guide before proceeding How to Install Java on CentOS 8.

Install Rundeck on Centos 8

01- First, let’s import the Rundeck GPG key using the following rpm command:

$ sudo rpm --import

02- Install the latest Rundeck Repository by running the below command:

$ sudo dnf install -y

03- Install the latest version of Rundeck by typing:

$ sudo dnf install rundeck -y

04- By default, Rundeck uses an H2 database as its repository. But the use of H2 database is not recommended for production environments. Therefore, we will use MySQL as a database backend for Rundeck.

If you do not have a running MySQL database server, then you need to follow this guide install MySQL Server on CentOS 8.

– Run the below commands to create the Rundeck database:

$ mysql -u root -p
Welcome to the MariaDB monitor.  Commands end with ; or \g.
Your MariaDB connection id is 16
Server version: 10.3.17-MariaDB MariaDB Server

Copyright (c) 2000, 2018, Oracle, MariaDB Corporation Ab and others.

Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.

MariaDB [(none)]> create database rundeck;
Query OK, 1 row affected (0.001 sec)

MariaDB [(none)]> grant all on rundeck.* to 'rundeckuser'@'localhost' identified by 'Password';
Query OK, 0 rows affected (0.001 sec)

MariaDB [(none)]> flush privileges;
Query OK, 0 rows affected (0.000 sec)

MariaDB [(none)]> exit

#centos/redhat #devops #linux #rundeck

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How to install Rundeck on centos 8 - YallaLabs
Chet  Lubowitz

Chet Lubowitz


How to install PgAdmin 4 on CentOS 8

pgAdmin is the leading graphical Open Source management, development and administration tool for PostgreSQLpgAdmin4 is a rewrite of the popular pgAdmin3 management tool for the PostgreSQL database.

In this tutorial, we are going to show you how to install pgAdmin4 in Server Mode as a web application using httpd and Wsgi module on CentOS 8.

Install pgAdmin4 on CentOS 8

**01-**To install pgAdmin4 on CentOS 8 we need to add an external repository, so execute the following command:

$ sudo rpm -i

02- After we add the pgAdmin4 repository, let’s use the below command to install pgAdmin4 as server mode:

$ sudo dnf install pgadmin4-web

03- Before proceeding with the configuration of pgAdmin4, we need to install policycoreutils tool:

$ dnf install policycoreutils-python-utils  

04- Once we done installing pgAdmin4, we need to configure the pgAdmin4 by setting up the initial pgAdmin user account

#databases #linux #ubuntu #install pgadmin4 #install pgadmin4 centos #pgadmin #pgadmin 4 install #pgadmin 4 install centos #pgadmin4 #pgadmin4 install centos

Linux Tutorial


How to Install Atom Text Editor on CentOS 8 - YallaLabs

Atom is a free and open-source text and source code editor for OS X, Linux, and Windows with support for plug-ins written in Node.js, and embedded Git Control, developed by GitHub

In this tutorial, we are going to show you how to install latest version of Atom using .rpm package on your CentOS 8 machine.

#centos/redhat #linux #atom install #install atom #centos

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Laravel 8 CKEditor Tutorial Example

Laravel 8 CKEditor tutorial example. In this tutorial, you will learn how to install and use CKEditor in laravel 8.

Basically, there is two way to install and use CKEditor in laravel 8 app. But in this tutorial, we will show you a simple example of how to install CKEditor in laravel 8 app.

How to install CKEditor In Laravel 8 App

  • Step 1: Install Laravel 8 App
  • Step 2: Connecting App to Database
  • Step 3: Create Post Model & Migration
  • Step 4: Add Fillable Property in Model
  • Step 5: Make Route
  • Step 6: Create Controller
  • Step 7: Create Blade Views File
  • Step 8: Start Development Server

#how to install ckeditor in laravel 8 #laravel 8 install and use ckeditor example #how to install and use ckeditor in laravel? #laravel 8 integrate ckeditor with example #how to install & integrate ckeditor (wysiwyg) in laravel 8

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Java Questions


How To Install PyCharm on CentOS 7 and 8

PyCharm is an IDE (or Integrated Development Environment) for the Python programming language. It is a cross-platform development environment that is compatible with Windows, macOS, and Linux. It provides a tool that integrates code analysis, graphical debugging, unit testing, and also contains an integrated terminal that supports development on remote hosts and virtual machines.

PyCharm was created by JetBrains based on the IntelliJ IDEA platform. There are two main versions of PyCharm.

The PyCharm Community Edition – This version is used for development without the framework options and other features that are necessary for writing Enterprise solutions.
The PyCharm Professional Edition – This version is used to develop software for large projects where frameworks and additional libraries are needed. This version contains support for Scientific and Python development and supports HTML, JS, and SQL.
For successful developers, it is crucial to have excellent tools that lessen their workload and save time. Additionally, PyCharm utilizes various plugins and extensions, written by both IntelliJ IDEA and other third-party contributors to increase functionality. The Professional Edition has a free trial period during which users can familiarize themselves with it and its use or the open-source Community Edition which allows for continued free usage.

#centos #centos 7 #centos 8 #code analysis #cross platform

Wilford  Pagac

Wilford Pagac


How to Install Security Updates on CentOS 8

Keeping your Linux system up-to-date is a very critical task, especially when it comes to installing security updates. This ensures that your system stays safe, stable, and keeps you on top of the latest security threats.

In this short and precise article, we will explain how to install security system updates on a CentOS 8 Linux system. We will show how to check for system updates (for all installed packages), updates for a specific package, or security updates only. We will also look at how to install updates either for a specific package, for all installed packages, or security updates only.

First, log into your system and open a terminal window, or if it is a remote system, access it via ssh. And before you move any further, take note of your the current kernel version on your system:

# uname -r

Check Current Kernel Version

Check Current Kernel Version

Checking Security Updates for CentOS 8 Server

To check if there are any updates available, issue the following command on the command prompt. This command non-interactively checks whether there are any updates are available for all packages on your system.

# dnf check-update

Check CentOS 8 Updates

Check CentOS 8 Updates

If you want, you can check updates for a specific package, provide the package name as shown.

# dnf check-update cockpit

Check Updates for Package

Check Updates for Package

Checking Security Updates for Installed Software Packages

You can determine if there are security-related updates or notices available, using the following command. It will show a summary of security notices displaying the number of updates in each category. From the screenshot below, there is 1 security update available for us to install on the test system.

# dnf updateinfo

Check Notices for Security Updates

Check Notices for Security Updates

To show the actual number of security packages with updates for the system, run the command that follows. Although there is only 1 security update as indicated in the output of the previous command, the actual number of security packages is 3 because the packages are related to each other:

# dnf updateinfo list sec
# dnf updateinfo list sec | awk '{print $3}'

List Number of Security Updates

#centos #security #centos tips #centos-8