unset -- Command

Unset an environment variable or shell function
unset environmental_variable
unset -f shell_function

The command unset unsets an environmental variable or shell function.

When used with the option -f,  unset unsets the shell function named on the
command line.  This option applies only to the Bourne shell sh.

When used  without the option  -f, unset unsets  the environmental variable
named on the command line.  This version of the command applies to both the
Bourne shell sh and the Korn shell ksh.

See Also

commands,
environmental variables,
ksh,
sh

© 2012 by Stephen A. Ness