ID(1) | General Commands Manual | ID(1) |
id
— return user
identity
id |
[user] |
id |
-A |
id |
-F [user] |
id |
-G [-n ]
[user] |
id |
-P [user] |
id |
-g [-nr ]
[user] |
id |
-p [user] |
id |
-u [-nr ]
[user] |
The id
utility displays the user and group
names and numeric IDs, of the calling process, to the standard output. If
the real and effective IDs are different, both are displayed, otherwise only
the real ID is displayed.
If a user (login name or user ID) is specified, the user and group IDs of that user are displayed. In this case, the real and effective IDs are assumed to be the same.
The options are as follows:
-A
-F
-G
-P
-a
id
implementations.-g
-n
-G
, -g
and
-u
options instead of the number. If any of the ID
numbers cannot be mapped into names, the number will be displayed as
usual.-p
-r
-g
and
-u
options instead of the effective ID.-u
The id
utility exits 0 on success,
and >0 if an error occurs.
Show information for the user
‘bob
’ as a password file entry:
$ id -P bob bob:*:0:0::0:0:Robert:/bob:/usr/local/bin/bash
Same output as groups(1) for the root user:
$ id -Gn root wheel operator
Show human readable information about
‘alice
’:
$ id -p alice uid alice groups alice webcamd vboxusers
Assuming the user ‘bob
’
executed “su
-l
” to simulate a root login, compare the
result of the following commands:
# id -un root # who am i bob pts/5 Dec 4 19:51
The id
function is expected to conform to
IEEE Std 1003.2 (“POSIX.2”).
The historic groups(1)
command is equivalent to “id
-Gn
[user]”.
The historic whoami(1)
command is equivalent to “id
-un
”.
The id
command appeared in
4.4BSD.
March 5, 2011 | macOS 14.6 |