# fish

> The Friendly Interactive SHell, a command-line interpreter designed to be user friendly.
> More information: <https://fishshell.com/docs/current/cmds/fish.html>.

- Start an interactive shell session:

`fish`

- Start an interactive shell session without loading startup configs:

`fish {{[-N|--no-config]}}`

- Execute specific commands:

`fish {{[-c|--command]}} "{{echo 'fish is executed'}}"`

- Execute a specific script:

`fish {{path/to/script.fish}}`

- Check a specific script for syntax errors:

`fish {{[-N|--no-execute]}} {{path/to/script.fish}}`

- Execute specific commands from `stdin`:

`{{echo "echo 'fish is executed'"}} | fish`

- Start an interactive shell session in private mode, where the shell does not access old history or save new history:

`fish {{[-P|--private]}}`

- Define and export an environmental variable that persists across shell restarts (builtin):

`set {{[-U|--universal]}} {{[-x|--export]}} {{variable_name}} {{variable_value}}`