fishshell

Additional Notes

Fish (Friendly Interactive SHell) is designed for interactive terminal use. The command to run it is fish; fishshell is an alternative page name for the same shell. It provides syntax highlighting, autosuggestions, command completions, and a web-based configuration tool without much setup.

Syntax

fish [options] [script.fish] [arguments]
fish_config

Parameters

• options: Startup options for the Fish shell.
• script.fish: Fish script to run.
• arguments: Arguments passed to the script.

Common Options

• -c COMMAND: Run a command and exit.
• -i: Force interactive mode.
• -l, --login: Run as a login shell.
• -n, --no-execute: Parse commands but do not run them.
• -N, --no-config: Start without loading user configuration.
• -v, --version: Show version information.

Examples

fish

Start an interactive Fish shell.

fish -c "echo hello"

Run one command with Fish and exit.

fish -n script.fish

Check a Fish script for syntax errors.

fish_config

Open Fish's browser-based configuration interface.

Practical Notes

• Fish is not POSIX-compatible, so Bash scripts usually need changes before they run in Fish.
• The main configuration file is ~/.config/fish/config.fish.
• Use the fish page in this handbook for the fuller command reference.
• To make Fish your login shell, install it first and then use chsh -s "$(command -v fish)".