Linux Journal, representing 25+ years of publication, is the original magazine of the global Open Source community.

This article is reprinted from the book A Practical Guide to Linux Commands, Editors, and Shell Programming 3rd edition, with permission of the author and publisher ...

Simply put, a Shell Script is a program that is run by a UNIX/Linux shell. It is a file that contains a series of commands which are executed sequentially as if they were entered on the command line ...

Linux built-ins are commands that are built into the shell, much like shelves that are built into a wall. You won’t find them as stand-alone files the way standard Linux commands are stored in ...

Shell builtins are commands that are loaded into memory when a shell — such as bash, sh, or zsh — is invoked. The reason for this is that keeping these commands in memory helps ensure that these ...

Jack Wallen shows how you can create a Linux shell script that requires a password without having to save a password within the script. Linux is the most flexible ...

Linux shell scripting is a foundational skill for ethical hackers and penetration testers who want to automate repetitive tasks and build powerful command-line tools. This practical guide shows you ...

It is easy to dismiss bash — the typical Linux shell program — as just a command prompt that allows scripting. Bash, however, is a full-blown programming language. I wouldn’t presume to tell you that ...

The shell is the unsung hero of your Linux experience. Sitting between you and the programs your operating system runs, the shell is a user interface and a programming language rolled into one. One of ...

The Windows Subsystem for Linux is bridging the divide between Windows and Linux by letting you run Windows 10 programs directly within a Linux shell. One of the strengths of the Windows Subsystem for ...