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How to upgrade from Ubuntu 20.04 LTS to 22.04 LTS
Upgrading to a new version of Ubuntu from the command line involves the following steps:rn rn Make sure your system is up-to-date: Before you begin the upgrade process, you should ensure that your system is fully up-to-date by running the command sudo apt update and sudo apt upgrade . This will upda
How to install GIMP 2.10 on Ubuntu or Debian Linux
GIMP (GNU Image Manipulation Program) is a free and open-source image editing software that can be installed on Ubuntu or Debian Linux. Here's an example of how to install GIMP 2.10 on Ubuntu or Debian Linux:rn rn Add the GIMP PPA: To install GIMP 2.10 on Ubuntu or Debian, you will first need to add
Debian 11 Set Up OpenVPN Server
Setting up an OpenVPN server on Debian 11 can be done in just a few minutes by following these steps:rn rn Install OpenVPN: rn rn rn rn sudo apt update rnsudo apt install openvpnrn rn rn rn Generate the necessary encryption keys and certificates: rn rn rn rn sudo easyrsa init -pkirnsudo easyrsa buil
file_get_contents(): https:// wrapper is disabled in the server configuration
The "file_get_contents(): https:// wrapper is disabled in the server configuration" error message occurs when the function file_get_contents() is used to access a file over HTTPS, but the server configuration does not have the https wrapper enabled. This error occurs because PHP needs to access t
How to install aws cli on Linux
The AWS Command Line Interface (CLI) is a unified tool to manage your AWS services. You can install the AWS CLI on Linux using pip, a package manager for Python. Here's an example of how to install the AWS CLI on Linux:rn rn Install pip: rn rn rn rn curl - O https: / / bootstrap.pypa.io / get - p
How do you add comments on UFW firewall rule?
You can add comments to UFW firewall rules by using the ufw command-line tool. UFW allows you to add comments to the end of a rule using the --comment option. To add a comment to an existing rule, you can use the ufw insert command to insert a new rule before an existing rule, and include the --c
PHP Warning: Constant ABSPATH already defined in wp-config.php
The "PHP Warning: Constant ABSPATH already defined in wp-config.php" error message occurs when the ABSPATH constant is defined more than once in the wp-config.php file. The ABSPATH constant is used to define the absolute path of the WordPress installation on the server. It is defined in the wp-co
How to convert JSON to CSV using Linux / Unix shell
There are several ways to convert JSON to CSV using Linux or Unix shell, here are a few popular options:rn rn Using jq : jq is a command-line JSON processor that can be used to convert JSON to CSV. The basic command to convert a JSON file to CSV using jq is: rn rn rn rn jq -r '.' input .json | jq -r
How to backup & restore a list of installed FreeBSD packages
On FreeBSD, you can use the pkg command to backup and restore a list of installed packages.rn rn Backup installed packages: To create a backup of the currently installed packages, you can use the command pkg backup -d backup_directory . This command will create a file called "pkg-backup.txz" in the
How to Set Up WireGuard VPN on Amazon Linux 2
setting up a WireGuard VPN on Amazon Linux 2 requires several steps. Here is an overview of the process: n n Install the WireGuard package: n n n n sudo amazon-linux-extras install wireguard n n n n Enable the WireGuard kernel module: n n n n sudo modprobe wireguard n n n n Create a new WireGuard in
How to change hostname on Amazon Linux 2 without reboot
On Amazon Linux 2, you can change the hostname without rebooting the system by following these steps: n n Edit the hostname file: Run the command sudo nano /etc/hostname to open the hostname file in the nano text editor. Change the current hostname to the desired hostname, then save the file and exi
How to check if Ansible collection is installed or not
You can check if an Ansible collection is installed by using the ansible-galaxy command-line tool. To check if a specific collection is installed, you can use the list command with the --installed option. For example:rn rn rn ansible-galaxy collection list --installed rn rn rnThis will list all t
Ubuntu 22.04 Set Up UFW Firewall in 10 Minutes
The Uncomplicated Firewall (UFW) is a firewall management tool for Ubuntu that makes it easy to set up and configure a firewall. Here's a quick guide on how to set up a firewall using UFW on Ubuntu 22.04:rn rn Install UFW: Open a terminal and run the command sudo apt-get install ufw to install UFW.
How to add swap to AWS EC2/Lightsail Amazon Linux instance
To add swap to an Amazon Linux EC2 or Lightsail instance on AWS, you can use the following steps:rn rn Connect to your instance via SSH. rn Check if there is any existing swap partition by running the command sudo swapon --show rn If there is no existing swap partition, create a new one by running t
How to run ls command case insensitive mode on Linux/Unix
The ls command in Linux and Unix is case-sensitive by default, but you can make it case-insensitive by using the -f option (which tells ls to not sort the files) in combination with the -i option (which tells ls to ignore the case when sorting). Here's an example command that runs the ls command
How to install MySQL server on Ubuntu 22.04 LTS Linux
To install MySQL server on Ubuntu 22.04 LTS Linux, you can use the package manager apt . First, make sure the package database is up to date by running:rn rn sudo apt update rn rn rnThen install the MySQL server package:rn rn rn sudo apt install mysql-serverrn rn rnDuring the installation process
How to upgrade OpenSUSE 15.3 to 15.4 using the CLI
Upgrading to a new version of OpenSUSE from the command line involves the following steps: n n Make sure your system is up-to-date: Before you begin the upgrade process, you should ensure that your system is fully up-to-date by running the command zypper update . This will update any existing packag
How to install dig, delv, host commands on FreeBSD
To install the dig , delv , and host commands on FreeBSD, you can use the package manager pkg . n First, make sure the package database is up to date by running: n n n sudo pkg update n n n Then install bind-tools package, which includes dig , delv , and host commands: n n n sudo pkg install bind -t
How to see Raspberry Pi OS version on Raspberry PI
You can check the version of Raspberry Pi OS (formerly Raspbian) that is currently installed on your Raspberry Pi by using the command cat /etc/os-release . This command will display a file called os-release, which contains information about the operating system, including the version number. Alt
Find APT packages occupy the most space on Debian/Ubuntu
You can use the command dpkg-query to list all installed packages and their sizes on a Debian or Ubuntu system. You can then sort the list by size to find the packages that are using the most space. Here's an example command that will list the installed packages in descending order of size:rn rn rn
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