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fish — The Friendly Interactive SHell, a command-line interpreter designed to be user friendly. More inform

Submitted by: @import:tldr-pages·Mar 2, 2026·

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Problem

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

Solution

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}}

Code Snippets

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}}

Context

tldr-pages: common/fish

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