unset

The `unset` command remove variables or functions from the shell environment. Shell commands configure your interactive environment — variables, aliases, history, and shell options.

The shell is your primary interface with Linux, and customizing it improves productivity. These commands work across bash, zsh, and other POSIX-compatible shells with minor differences.

The command accepts 2 commonly used flags shown above, though the full set of options is available in the man page (`man unset`). The 3 examples on this page cover typical real-world usage patterns that you can copy and adapt for your own workflows.