       id options

              This command provides a means of getting, setting and converting
              user, group and process ids.  The id command has  the  following
              options:

              id user ?name?

              id userid ?uid?
                     Set the real and effective user ID to name or uid, if the
                     name (or uid) is valid and permissions allow it.  If  the
                     name (or uid) is not specified, the current name (or uid)
                     is returned.

              id convert userid uid

              id convert user name
                     Convert a user ID number to a user name, or vice versa.

              id group ?name?

              id groupid ?gid?
                     Set the real and effective group ID to name  or  gid,  if
                     the  name (or gid) is valid and permissions allow it.  If
                     the group name (or gid) is  not  specified,  the  current
                     group name (or gid) is returned.

              id groups

              id groupids
                     Return the current group access list of the process.  The
                     option groups returns group names and groupids returns id
                     numbers.

              id convert groupid gid

              id convert group name
                     Convert a group ID number to a group name, or vice versa.

              id effective user

              id effective userid
                     Return the effective user name, or effective user ID num-
                     ber, respectively.

              id effective group

              id effective groupid
                     Return  the  effective  group name, or effective group ID
                     number, respectively.

              id effective groupids
                     Return all of the groupids the user is a member of.

              id host
                     Return the hostname of the system the program is  running
                     on.

              id process
                     Return the process ID of the current process.

              id process parent
                     Return  the  process  ID  of  the  parent  of the current
                     process.

              id process group
                     Return the process group ID of the current process.

              id process group set
                     Set the process group ID of the current  process  to  its
                     process ID.

              id host
                     Returns the standard host name of the machine the process
                     is executing on.

                     On Windows 95/NT, only the host and process  options  are
                     implemented.
