readonly Command

The readonly command marks ksh environment variables unchangeable.

Syntax

readonly	List all ksh variables with the -r attribute.
readonly name...	Set the -r attribute for the given variables.
readonly name=value...	Assign a new value and then set the -r attribute for the given variables. See typeset Command for more information.

where:

name is the name of a ksh environment variable.

value is a value for a ksh environment variable.