Shells like KornShell, Bash, Zsh, and Fish offer command-line editing; Emacs-style editing is recommended. Have ...

Understanding the Linux CLI. The command-line interface (CLI) is the cornerstone of interacting with the Linux operating system. It allows users to enter commands directly, offering greater control ...

BEGIN and END. Two unique patterns, BEGIN and END, execute commands before gawk starts processing the input and after it finishes processing the input.The gawk utility executes the actions associated ...

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 Prentice Hall, copyright 2012 ...

Learn why and how to run multiple shells in Linux. Test your scripts in different shells such as Bash, Dash, Fish, and Zsh ...

The input prompt is more like a command prompt for a programming language. In fact, Forth programmers will appreciate the RPN capabilities: /tmp/cosh$ 5 3 / 1 /tmp/cosh$ 5.0 3 / 1.6666666666666667 ...

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 pres… ...

Shell basics. The Unix command line shell is roughly equivalent to the command window in Microsoft Windows (cmd or PowerShell). The commands we walk through below will work on any Unix-like system ...