printenv(1)

     NAME
          printenv - print all or part of environment

     SYNOPSIS
          printenv [--help] [--version] [variable...]

     DESCRIPTION
          This documentation is no longer being maintained and may be
          inaccurate or incomplete.  The Texinfo documentation is now
          the authoritative source.

          This manual page documents the GNU version of printenv.  If
          no arguments are given, printenv prints the entire
          environment.  If one or more variable names are given, it
          prints the value of each one that is set, and nothing for
          each one that is not set.

          The exit status is:
          0 if all variables specified were found
          1 if at least one specified variable was not found
          2 if a write error occurred

        OPTIONS
          --help
               Print a usage message on standard output and exit
               successfully.

          --version
               Print version information on standard output then exit
               successfully.