Install PostgreSQL 13 on Rocky Linux - Best Method ?

This article covers PostgreSQL 13 installation on Rocky Linux 8.4. Basically, PostgreSQL is the world's most advanced open source database system. And with the release of PostgreSQL 13 there are significant improvements to the indexing and lookup system that benefit large databases, and faster response times for queries that use aggregates or partitions.

How to Enable and Start PostgreSQL Service ?

To enable and start the PostgreSQL database service so that it can start automatically with system boot:

$ sudo systemctl start postgresql-13
$ sudo systemctl enable postgresql-13

To confirm everything is working fine, check the status of PostgreSQL service:

$ sudo systemctl status postgresql-13

Install Wireshark on Linux Mint 20 - Best Method ?

This article covers how to install Wireshark on a Linux Mint 20 system. Wireshark is an open source GUI based packets capturing  in the network in real-time. It will intercepts traffic and converts that binary into human readable format. This helps to inspect network traffic to and fro on your network for troubleshooting network issues like dropped packets, latency issues, and malicious activity on your network. Majority of the packets are TCP, UDP and ICMP etc. Wireshark uses a pcap library for capturing the network packets.

To Install Wireshark on Linux:

1. Add official Wireshark package repositories:

$ sudo add-apt-repository ppa:wireshark-dev/stable

2. Update your system:

$ sudo apt-get update

3. Start Wireshark installation with below command:

$ sudo apt-get install wireshark

Install Gitea on Ubuntu 20.04 - Best Method ?

This article covers how to install Gitea on Ubuntu 20.04 LTS. Gitea is a self-facilitated open-source git worker written in Go. It is a fork of Gogs . Gitea incorporates a store record supervisor, venture issue following, clients administrations, notices, implicit wiki, and considerably more. 

To Install Git on Linux, run the commands: 

$ sudo apt update
$ sudo apt install git

To Confirm Git Installation, execute the command: 

$ git --version

Install Puppet on Ubuntu 20.04 - Best Method ?

This article covers the installation of a puppet server on both master and client nodes and how to connect them. Ensure that you sign the puppet agent node certificate for both the master and client-side.

Puppet is a free and open-source automated administrative engine for Linux, Unix, and Windows operating systems. It is used for deploying, configuring, and managing servers and performs administrative tasks such as adding users, installing packages, and many more. It helps system admins to free up time and mental space by automating tasks on thousands of physical and virtual machines. It uses a client-server model. Where Puppet master controls configuration information for Puppet agents while Puppet agents talk to and pull down configuration profiles from the Puppet master.

Install Flatpak on CentOS 8 - Best Method ?

This article covers the installation steps of Flatpak on the CentOS 8 system. With Flatpak, users can easily install new packages or applications from the flathub repository in an isolated space.

Flatpak is a package management system that aims to enable  users and developers to install and manage software packages on Linux systems regardless of the Linux distribution, runtime, dependencies and the type of package management. A flatpak application runs in a sandboxed environment. This is an isolated environment that is bundled with all the dependencies, libraries and everything that is needed for the app to run smoothly. 

How to Enable Flatpak in Red Hat / CentOS / Fedora ?

For RedHat / CentOS 8 and Fedora 22 and later versions, invoke the command below to enable flatpak:

$ sudo dnf install flatpak

For earlier versions of Red Hat and CentOS use the YUM package manager:

$ sudo yum install flatpak

Check Laptop Battery Status on CentOS 8 - Best Method ?

This article covers different methods for checking the battery status on CentOS 8. The battery status and ACPI https://en.wikipedia.org/wiki/Advanced_Configuration_and_Power_Interface information is stored in /proc and /sys directory. Using "upower" command or "acpi" command you can get this information.

upower is a command line tool which provides an interface to enumerate power sources on the system. Execute below command in the terminal.

The upower command will show detailed information about the battery:

$ upower -i /org/freedesktop/UPower/devices/battery_BAT1

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