fish

friendly interactive shell

TLDR

Start fish shell

$ fish

Execute command

$ fish -c "[echo hello]"

Run script

$ fish [script.fish]

Start without config

$ fish --no-config

Check syntax

$ fish -n [script.fish]

SYNOPSIS

fish [options] [file] [arguments...]

fish (Friendly Interactive Shell) is a smart, user-friendly shell with syntax highlighting, autosuggestions, and tab completions that work out of the box.Unlike bash or zsh, fish doesn't require extensive configuration to be useful. It features web-based configuration, informative error messages, and discoverable features.fish uses a cleaner scripting syntax that differs from POSIX shells, prioritizing usability over compatibility.

PARAMETERS

FILE

Script file to execute.

-c COMMAND

Execute command and exit.

-n, --no-execute

Syntax check only.

--no-config

Skip configuration files.

-i, --interactive

Force interactive mode.

-l, --login

Act as login shell.

-p, --profile FILE

Output profiling data.

--help

Display help information.

CONFIGURATION

~/.config/fish/config.fish

User configuration file loaded on shell startup.

~/.config/fish/fish_variables

Universal variables stored persistently across sessions.

**~/.config/fish/functions/*.fish**

User-defined functions, one per file.

INSTALL

sudo apt install fish

sudo dnf install fish

sudo pacman -S fish

sudo apk add fish

sudo zypper install fish

brew install fish

nix profile install nixpkgs#fish

CAVEATS

Not POSIX-compatible. Scripts need fish-specific syntax. Some commands differ from bash/zsh.

HISTORY

fish was created by Axel Liljencrantz in 2005 to address shell usability issues. It prioritizes interactive use and discoverability, embracing incompatibility with POSIX to improve user experience.

RESOURCES

Homepage · Source code