Rahul Sahu

To add a directory to your $PATH environment variable on a Linux system permanently, you can edit the shell profile file. The exact file you need to edit depends on your shell. For the bash shell, you can add a directory to the $PATH environment variable by editing the .bashrc file in your home directory. … Read more

To install wget on RHEL/CentOS 6/7/8/9, you can use the yum package manager. Update the package repository: To ensure that you have the latest packages available, run the following command: sudo yum update Install wget: To install wget, run the following command: sudo yum install wget Verify the installation: You can verify that wget has … Read more

To pair Pi-hole with OpenVPN on Ubuntu or Debian Linux, you need to follow these steps: Install OpenVPN: Install OpenVPN on your Ubuntu or Debian Linux system by running the following command: sudo apt-get update && sudo apt-get install openvpn Download OpenVPN configuration files: Download the OpenVPN configuration files from your VPN provider. These files … Read more

A bash alias is a shorthand way to reference a longer command. Aliases can be created temporarily, but they will be lost when you log out or restart your computer. To create a permanent bash alias on Linux or Unix, follow these steps: Open your bash profile file: You can open your bash profile file … Read more

Yaourt is a package manager for Arch Linux and its derivatives such as Manjaro Linux. It extends the functionality of the pacman package manager by providing support for the installation of packages from the Arch User Repository (AUR). To install yaourt on Arch Linux, follow these steps: Install base-devel package: Before you can install yaourt, … Read more

To change the root password on CentOS Linux, follow these steps: Boot into Single User Mode: You can boot your CentOS system into single user mode by adding single to the kernel command line during boot. Mount the root partition: In single user mode, the root partition will be mounted read-only. To change the root … Read more

To change the screenshots save file location in macOS X, follow these steps: Open Terminal: You can find Terminal by searching for it using Spotlight, or you can find it in the Utilities folder within the Applications folder. Enter the following command: defaults write com.apple.screencapture location ~/Desktop/Screenshots Replace ~/Desktop/Screenshots with the desired save file location … Read more

To compile and install Tarsnap on an Ubuntu/Debian Linux system, follow these steps: Install dependencies: Tarsnap requires several libraries and tools to be installed on your system before you can compile and install it. To install these dependencies, run the following command: sudo apt-get install build-essential libssl-dev zlib1g-dev libcurl4-openssl-dev Download the Tarsnap source code: You … Read more

To install the GNU GCC compiler and development environment on Ubuntu Linux, follow these steps: Update the package list: sudo apt-get update Install the build-essential package: The build-essential package includes the GCC compiler and a number of other development tools. To install this package, run the following command: sudo apt-get install build-essential Verify the installation: … Read more

In Linux/Unix, you can assign the output of a grep command to a variable using command substitution. Command substitution allows you to capture the output of a command and use it as the value of a variable. Here’s an example of how to assign the output of a grep command to a variable in a … Read more