SysAdmin

Snaps are self-contained application packages with mediated access to the system they are installed on. They have all the required dependencies within that package. This tutorial explains how to install Snap on Ubuntu.

The wall command allows sending terminal messages to all logged-in users at once. This feature is particularly useful in scenarios when system administrators perform system maintenance tasks, and they need a quick way to inform users they should save their work and log out. This tutorial explains the wall command syntax and options.

Validating a file download by comparing its original checksum with the checksum you obtained by checking the file yourself is a reliable way to confirm the integrity of your download. This tutorial shows how to use the Linux md5sum command to verify the integrity of a file.

The Linux kernel is extensible and uses modules (drivers) to make the communication between hardware and software run smoothly. Learn how to add and remove official modules using the modprobe command.

While some Linux commands take input both from the standard input (stdin) and as a command-line argument, some are limited to take input only as an argument. To process input from stdin, those commands need to utilize the xargs command. This tutorial covers the most common uses of xargs in Linux.

VirtaulBox and VMware are two of the most popular virtualization platforms that allow you to run multiple virtual machines on a single server. Learn about how they differ and which one is best for you in this head-to-head comparison.

The sleep command is used when it is necessary to postpone the execution of commands on the command line or in shell scripts. This tutorial lists ways in which you can utilize the sleep command and provides examples for each use case.

The ss (socket statistics) tool is used for displaying various network and socket statistics. It is a faster version of the neststat tool. This article gives an in-depth overview of how to use it with various examples.

By default in Linux, a command received through standard input writes directly to standard output. The tee command changes that behavior by allowing another command to use a file as the output. This tutorial lists ways in which you can use the tee command.

RHEL is now free for small production workloads, up to 16 systems. Red Hat announced their newly modified no-cost RHEL program as a response to the growing dissatisfaction due to the switch to CentOS Stream.