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