To remove or uninstall OpenSSH server in a Unix or Linux environment, follow these steps: Stop the OpenSSH service. Depending on your Unix or Linux distribution, use one of the following commands: systemctl stop ssh service ssh stop /etc/init.d/ssh stop Uninstall the OpenSSH server package. Again, depending on your distribution, use one of the following … Read more

In Linux or Unix, you can find the inode number of a file using the ls command with the -i option. Here’s how: Open a terminal window and navigate to the directory where the file you want to find the inode number for is located using the cd command. Use the following command to display … Read more

In Linux or Unix, you can extract the contents of a .tar.gz file using the tar command. Here’s how: Navigate to the directory where the .tar.gz file is located using the cd command. Use the following command to extract the contents of the .tar.gz file: tar -xzvf file.tar.gz Replace file.tar.gz with the actual name of … Read more

In CentOS or Red Hat Enterprise Linux (RHEL), you can disable or enable SELinux policy modules using the setsebool command. Here’s how to disable a SELinux policy module: Determine the name of the SELinux policy module you want to disable. You can use the following command to list all the available SELinux policy modules: semodule … Read more

In Ubuntu Linux, you can add a user to a group using the usermod command. Here’s an example: First, determine the name of the user and the group you want to add the user to. For example, let’s say the user’s name is user1 and the group name is group1. Use the following command to … Read more

In HP-UX Unix, CD-ROM or DVD devices can be mounted using the mount command. Here’s an example of how to mount a CD-ROM/DVD device: Determine the device name of the CD-ROM/DVD drive. You can use the following command to get a list of available block devices: ioscan -fnC disk Look for a device with the … Read more

To see all exported variables and functions in the bash shell, you can use the following command: declare -p | grep -E ‘^declare -[a-zA-Z]*x’ This will show all exported variables and functions in the current shell session, including environment variables, shell functions, and aliases. The declare command is used to show the values of shell … Read more

To change the author ID (attribution) on all posts in a single pass in WordPress, you can use the following steps: Log in to your WordPress site as an administrator. Navigate to the WordPress Dashboard and select “Posts” from the menu on the left side. Select all posts by clicking the checkbox next to the … Read more

To install VirtualBox on a Debian-based Linux system, you can use the following steps: Add the Oracle VirtualBox repository to your system’s repository list: echo “deb http://download.virtualbox.org/virtualbox/debian $(lsb_release -sc) contrib” | sudo tee /etc/apt/sources.list.d/virtualbox.list Download and add the Oracle public key: wget -q https://www.virtualbox.org/download/oracle_vbox_2016.asc -O- | sudo apt-key add – wget -q https://www.virtualbox.org/download/oracle_vbox.asc -O- | … Read more

To install the Z shell (zsh) on a FreeBSD system, you can use the following steps: Open a terminal window. Update the package index: sudo pkg update Install the zsh package: sudo pkg install zsh Once the installation is complete, you can start a zsh shell by running the following command: zsh To make zsh … Read more