Linux built-ins are commands that are part of a user’s shell. Sandra Henry-Stocker explains how to recognize them and get help on their use.

A program (binary, or executable) is a file on disk somewhere, in a recognized format. Common formats include ELF on Linux, ...

Let’s get to know the Linux Command Line Interface (CLI). Introduction A bit of history First look at the command line Command syntax Notes Basic commands pwd ls file cat cd clear history cp mv rm ...

1. The big one: rm -rf / This is the command every Linux administrator knows -- or should know, anyway -- to avoid. By itself, rm is very handy. It enables you to delete even the most stubborn files.

But, the shell, or its Windows equivalent. the command line, was never just for desktop users. Any Linux or Windows system administrator must know how to use this level of tools.

Linux systems offer a lot of choices for what shell you use. Some you'll love and others you maybe won't, but it's easy to try any of them out and change your shell when you find the one you prefer.

One of the most powerful features of Unix and Linux is that using traditional command line tools, everything is a stream of bytes. Granted, modern software has blurred this a bit, but at the comman… ...