alias: alias [-p] [name[=value] ... ]

Define or display aliases.

Without arguments, `alias' prints the list of aliases in the reusable form `alias NAME=VALUE' on standard output.

Otherwise, an alias is defined for each NAME whose VALUE is given. A trailing space in VALUE causes the next word to be checked for alias substitution when the alias is expanded.

Options
-p Print all defined aliases in a reusable format

Exit Status:
alias returns true unless a NAME is supplied for which no alias has been defined.