Summary
Bash (Bourne Again SHell) is a command-line interpreter and scripting language that serves as the default shell on most Linux distributions and macOS, used extensively for system administration and automation tasks.
What is Bash?
Bash is a Unix shell first released in 1989 as a free replacement for the Bourne Shell (sh). It is the default interactive shell on most Linux systems and was the default shell on macOS until 2019. Bash reads and executes commands either interactively from a terminal or from script files.
As a scripting language, Bash allows developers and system administrators to automate repetitive tasks, manage files and processes, and orchestrate other command-line tools. Bash scripts are widely used in CI/CD pipelines, server provisioning, and DevOps workflows.
Bash supports variables, control structures (if/for/while), functions, and pipes, making it a versatile tool for gluing together system utilities and automating complex workflows.
Why is Bash relevant?
- Ubiquity: Bash is available on virtually every Linux and macOS system, requiring no additional installation
- Automation: Bash scripts automate repetitive operational and build tasks, reducing manual effort
- Integration: Bash can invoke any CLI tool or system command, making it ideal for orchestrating complex workflows