You can disable core dumps in Linux, including systems that use systemd, by performing the following steps: Change the core dump pattern to prevent core dumps from being written to disk by adding the following line to the file /etc/sysctl.conf: fs.suid_dumpable = 0 Reload the sysctl configuration by running: sudo sysctl -p Check if core … Read more

Upgrading Debian 10 to Debian 11 Bullseye using the command line interface (CLI) involves several steps: Make sure your system is up-to-date by running: sudo apt update && sudo apt upgrade Backup your important data and configuration files, it’s always a good idea to have a backup before upgrading. Edit the sources list file /etc/apt/sources.list … Read more

The “find” command is a powerful command-line utility that can be used to search for files and directories in one or more directories. Here’s an example of how to search for files with the “.txt” extension in the directories “/home/user/dir1” and “/home/user/dir2”: find /home/user/dir1 /home/user/dir2 -name “*.txt” This command uses the “find” command with the … Read more

You can generate a QR code for a WireGuard configuration on Linux by using the qrencode command. The qrencode command is a command-line utility to generate QR codes. Here’s an example of how to use the qrencode command to generate a QR code for a WireGuard configuration: Create a WireGuard configuration file and save it … Read more

sshpass is a command-line utility that allows you to provide a password for an SSH login on the command-line, rather than being prompted for it interactively. Here’s an example of how to install sshpass on macOS/OS X: Install Homebrew: The easiest way to install sshpass on macOS/OS X is by using the package manager Homebrew. … Read more

You can stop the cat command in Linux by sending an interrupt signal (CTRL + C) to the terminal where the command is running. When you press CTRL + C it sends an interrupt signal to the process running in the terminal. This signal causes the process to terminate immediately. Alternatively, you can also stop … Read more

In Linux, you can use the command-line utility “lxc” to list snapshots for a container managed by LXD. Here’s an example of how to list snapshots for a container called “container1”: lxc info container1 | grep Snapshots This command uses the “lxc info” command to display information about the container “container1”, and then pipes the … Read more

Upgrading OpenSUSE 15.2 to 15.3 using the command line interface (CLI) involves several steps: Make sure your system is up-to-date by running: sudo zypper refresh && sudo zypper update Backup your important data and configuration files, it’s always a good idea to have a backup before upgrading. Add the OpenSUSE 15.3 repository to your system … Read more

In OpenSUSE/SUSE Linux, you can use the package manager “zypper” to list all installed packages. Here’s an example of how to list all installed packages on OpenSUSE/SUSE Linux: zypper se -i -t package This command uses the “zypper” command with the “se” (search) option, followed by the “-i” (installed) option and the “-t” (type) option … Read more

You can compress a whole directory using xz and tar by using the following command: tar -cJf directory.tar.xz directory/ This command will create a compressed archive called directory.tar.xz of the entire directory directory. Here’s a breakdown of the options used in the command: -c: create a new archive. -J: filter the archive through xz. -f: … Read more