A shell builtin is a command that is built into the shell itself, rather than being an external executable file. Builtins are executed directly by the shell, which allows for faster execution and access to shell features that may not be available to external commands.
Examples of common shell builtins include:
cd: Changes the current directory.echo: Displays a line of text.exit: Exits the shell.
Because builtins are part of the shell, they can often manipulate the shell's environment and state directly. If you have more questions or need further details, feel free to ask!
