Linux shell is made up of components that can be customized to the user’s preference using:
- VARIABLES: The most commonly customized part of the shell.
- FUNCTIONS: Defines the core functionalities of the shell
- ALIASES: Shortcuts
Shell Variables and settings
Global Profiles (All Users)
When invoked interactively with the –login option or when invoked as sh, Bash reads the /etc/profile instructions.
- /etc/profile.d/*.shthe /etc/profile.d directory, which contains files configuring system-wide behavior of specific programs.
etc/bashrc contains system-wide definitions for shell functions and aliases.
These files might not be in your home directory by default; create them if needed.
User specific profiles
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