print out the environment
utility prints out the names and
values of the variables in the environment, with one name/value pair per line.
is specified, only its value is
Some shells may provide a builtin
command which is similar or identical to this utility. Consult the
utility exits 0 on
success, and >0 if an error occurs.
utility is provided for
compatibility with earlier BSD
releases and is not specified by any
standards. The functionality of
can be duplicated with the
command appeared in