id(1)							      General Commands Manual							     id(1)

NAME

       id - Displays the user's system identity

SYNOPSIS

       id [user]

       id -G  [-n] [user]

       id -g  [-nr] [user]

       id -u  [-nr] [user]

       id -a

STANDARDS

       Interfaces documented on this reference page conform to industry standards as follows:

       id:  XCU5.0

       Refer to the standards(5) reference page for more information about industry standards and associated tags.

OPTIONS

       Displays all groups ids (real, effective, and supplementary) only, as unsigned decimal numbers.	Displays only the effective group id as an
       unsigned decimal number.  Displays user and group names as strings rather than as numbers.  Displays only the real ID.  Displays  only  the
       effective  user	ID  as	an  unsigned  decimal number.  [Tru64 UNIX]  Displays user and all group IDs and names if the environment variable
       CMD_ENV is set to the string svr4.

OPERANDS

       The user for whom information is to be written.

	      If this parameter is omitted, the user and group names associated with the invoking process are used.

DESCRIPTION

       The id command writes to standard output a message containing the user and group IDs and corresponding names of the invoking  process.	If
       effective names and IDs do not match the real ones, the id command writes both.

       If  user is specified and the invoking process has sufficient privileges, the IDs and names in the message are for user rather than for the
       invoking process. Effective IDs are assumed identical to real IDs.

       Your real user and group ids are specified in the /etc/passwd file and are your user and group ids on login.  You can  change  your  active
       group  with  the  newgrp  shell	command (see newgrp(1)) if additional groups are specified for you in the /etc/group file. Such groups are
       called supplementary .

       A process can also have an effective user or group id set when a set-user- or set-group-identifier program  is  executed.   See	setuid(2),
       setgid(2).

   SVID Conformance
       [Tru64  UNIX]  When  the  environment variable CMD_ENV is set to the string svr4, the command syntax and output is compatible with the SVID
       standard. In particular, the id command with no options displays the user's name and id and the real and effective  group  names  and  ids.
       The -a option adds any supplementary group names and ids to the display.

EXIT STATUS

       The following exit values are returned: Successful completion.  An error occurred.

EXAMPLES

       To display your user and group IDs, enter: id

	      Information is displayed similar to: uid=200(thomas)  gid=1(staff)

	      In  the  case  where  a  user  belongs  to  a supplementary group, information is displayed similar to: uid=200(thomas) gid=1(staff)
	      groups=0(system)

	      However, if the environment variable CMD_ENV is set to the string svr4, the command id with no options does not display any  supple-
	      mentary groups and results in a display similar to: uid=200(thomas) gid=1(staff) To display supplementary groups with CMD_ENV set to
	      svr4, use the command id -a. The display is then similar to: uid=200(thomas) gid=1(staff) groups=1(users),0(system)

ENVIRONMENT VARIABLES

       The following environment variables affect the execution of id: [Tru64 UNIX]  When this environment variable CMD_ENV is set to  the  string
       svr4,  the  command syntax and output is compatible with the SVID standard.  The -a option is only available in this condition.	Provides a
       default value for the internationalization variables that are unset or null. If LANG is unset or null, the  corresponding  value  from  the
       default	locale	is  used.   If any of the internationalization variables contain an invalid setting, the utility behaves as if none of the
       variables had been defined.  If set to a non-empty string value, overrides the values of  all  the  other  internationalization	variables.
       Determines  the	locale	for  the  interpretation  of sequences of bytes of text data as characters (for example, single-byte as opposed to
       multibyte characters in arguments).  Determines the locale for the format and contents of diagnostic messages written  to  standard  error.
       Determines the location of message catalogues for the processing of LC_MESSAGES.

FILES

       Group names declared on the system.  Password file.

SEE ALSO

       Commands:  groups(1), logname(1), newgrp(1), who(1)

       Functions:  getgid(2), getuid(2), setgid(2), setuid(2)

       Files:  group(4), passwd(4)

       Environment:  environ(5)

       Standards:  standards(5)

																	     id(1)