tldr/pages/common/fish.md

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# fish
> The Friendly Interactive SHell, a command-line interpreter designed to be user friendly.
> More information: <https://fishshell.com>.
- Start an interactive shell session:
`fish`
- Start an interactive shell session without loading startup configs:
`fish --no-config`
- Execute specific commands:
`fish --command "{{echo 'fish is executed'}}"`
- Execute a specific script:
`fish {{path/to/script.fish}}`
- Check a specific script for syntax errors:
`fish --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 --private`
- Define and export an environmental variable that persists across shell restarts (builtin):
`set --universal --export {{variable_name}} {{variable_value}}`