SysAdmin

The sort command allows you to arrange a file's contents in various ways, without changing the original file. This tutorial shows how to use the sort command.

The less command is a Linux terminal pager allowing you to open large files in the terminal one page at a time. Follow this guide and master the less command.

The 503 service unavailable error is a HTTP error code indicating the website is temporarily unavailable. Learn more about the error and how to troubleshoot it in this tutorial.

This tutorial shows how to read a file line by line using the Bash shell. See five different methods and process a file's contents effectively.

Data integration tools help transport, modify and integrate data into various systems. Learn about the different available tools today and leverage the power of your data.

The lspci command lets you display information about PCI devices connected to your system. Learn how to use the lspci command in this tutorial.

Having a precise list of installed packages helps system admins maintain, replicate, and reinstall systems. In this tutorial, learn how to list all installed packages with apt and dpkg, save the list to a file or list specific packages and versions.

The Linux bash shell saves a command history list, allowing you to review and reuse previous commands. Learn how to manage this list using the Linux history command.

The file command in Linux determines the type of a file. Learn how to use the file command in this tutorial.

A HereDoc helps pass multiple commands to another command, making redirection and Bash scripts easier to understand. Learn how to write a HereDoc through various examples in this guide.