Alias built-in
The alias built-in defines aliases or prints alias definitions.
Synopsis
alias [name[=value]…]
Description
The alias built-in defines aliases or prints existing alias definitions, depending on the operands. With no operands, it prints all alias definitions in a quoted assignment form suitable for reuse as input to alias.
Options
None.
Non-POSIX options may be added in the future.
Operands
Each operand must be of the form name=value or name. The first form defines an alias named name that expands to value. The second form prints the definition of the alias named name.
Errors
It is an error if an operand without = refers to an alias that does not exist.
Exit status
Zero unless an error occurs.
Examples
See Aliases.
Compatibility
The alias built-in is specified by POSIX.1-2024.
Some shells have predefined aliases that are printed even if you have not defined any explicitly.