TestOut Linux Pro Practice Test 2025 – Complete Exam Prep Guide

The default shell in most Linux distributions is Bash, which stands for "Bourne Again SHell." It is an enhanced version of the original Bourne shell (sh), incorporating many features that make it more versatile and user-friendly. Bash supports command-line editing, job control, shell functions, and a rich set of scripting capabilities, which make it suitable for both interactive use and scripting.

Bash has become the de facto standard shell for many users due to its widespread adoption and compatibility with scripts written for older shells like sh. Additionally, many Linux distributions configure Bash as the default shell for user accounts, which further consolidates its position as the standard shell environment across various systems.

The other shells mentioned, while present in Linux ecosystems, have not achieved the same level of default status or popularity. Csh (C shell), Ksh (Korn shell), and Sh (the original Bourne shell) each have their specific environments and use cases, but none match the ubiquity and functionality of Bash in the typical Linux user experience.