Reverse id command, I want the User/Group Name from the uid or gid
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I know some uid and gids that I don't know who they belong to and they are not in /etc/passwd (could be LDAP or from another system). How do I get Id info from only uid or gid preferably without using ldapsearch or any LDAP commands outside of getent or id, or something easy. Linux 2.6 Kernel, Red Hat variants.
linux users posix passwd
edited Sep 16 '16 at 11:12
Jeff Schaller
37.8k1053123
asked Jan 16 '14 at 22:09
Gregg Leventhal
2,944124375
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up vote
2
down vote
favorite
I know some uid and gids that I don't know who they belong to and they are not in /etc/passwd (could be LDAP or from another system). How do I get Id info from only uid or gid preferably without using ldapsearch or any LDAP commands outside of getent or id, or something easy. Linux 2.6 Kernel, Red Hat variants.
linux users posix passwd
edited Sep 16 '16 at 11:12
Jeff Schaller
37.8k1053123
asked Jan 16 '14 at 22:09
Gregg Leventhal
2,944124375
add a comment |
up vote
2
down vote
favorite
up vote
2
down vote
favorite
I know some uid and gids that I don't know who they belong to and they are not in /etc/passwd (could be LDAP or from another system). How do I get Id info from only uid or gid preferably without using ldapsearch or any LDAP commands outside of getent or id, or something easy. Linux 2.6 Kernel, Red Hat variants.
linux users posix passwd
edited Sep 16 '16 at 11:12
Jeff Schaller
37.8k1053123
asked Jan 16 '14 at 22:09
Gregg Leventhal
2,944124375
I know some uid and gids that I don't know who they belong to and they are not in /etc/passwd (could be LDAP or from another system). How do I get Id info from only uid or gid preferably without using ldapsearch or any LDAP commands outside of getent or id, or something easy. Linux 2.6 Kernel, Red Hat variants.
linux users posix passwd
linux users posix passwd
edited Sep 16 '16 at 11:12
Jeff Schaller
37.8k1053123
asked Jan 16 '14 at 22:09
Gregg Leventhal
2,944124375
edited Sep 16 '16 at 11:12
Jeff Schaller
37.8k1053123
asked Jan 16 '14 at 22:09
Gregg Leventhal
2,944124375
edited Sep 16 '16 at 11:12
Jeff Schaller
37.8k1053123
edited Sep 16 '16 at 11:12
Jeff Schaller
37.8k1053123
edited Sep 16 '16 at 11:12
Jeff Schaller
37.8k1053123
37.8k1053123
asked Jan 16 '14 at 22:09
Gregg Leventhal
2,944124375
asked Jan 16 '14 at 22:09
Gregg Leventhal
2,944124375
asked Jan 16 '14 at 22:09
Gregg Leventhal
2,944124375
2,944124375
add a comment |
add a comment |
2 Answers
2
active
oldest
votes
up vote
3
down vote
accepted
You can use the getent command, which will perform the lookup based on /etc/nsswitch.conf. This means that if ldap is configured on the system, getent will attempt to lookup the user in ldap. Here is an example:
$ getent passwd 33
www-data:x:33:33:www-data:/var/www:/bin/sh
answered Jan 16 '14 at 22:12
jordanm
30k28192
add a comment |
up vote
0
down vote
To get the username associated with a UID, use the -n option of id:
$ id
uid=1000(myself) gid=1000(myself) groups=1000(myself), 0(wheel), 9(wsrc)
$ id -n -u 1000
myself
This would not work on GIDs though as id expects usernames or UIDs:
$ id -n -g 9
id: 9: No such user
You can query both the passwd database and the group database for UIDs and GIDs with getent:
$ getent passwd 1000
myself:*:1000:1000:Just me,,,:/home/myself:/bin/sh
$ getent group 9
wsrc:*:9:myself
The actual username or group name may be parsed out of that by piping the output through cut -d : -f 1.
id is a POSIX utility, while getent is not.
answered 2 days ago
Kusalananda
120k16225367
add a comment |
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2 Answers
2
active
oldest
votes
2 Answers
2
active
oldest
votes
active
oldest
votes
active
oldest
votes
up vote
3
down vote
accepted
You can use the getent command, which will perform the lookup based on /etc/nsswitch.conf. This means that if ldap is configured on the system, getent will attempt to lookup the user in ldap. Here is an example:
$ getent passwd 33
www-data:x:33:33:www-data:/var/www:/bin/sh
answered Jan 16 '14 at 22:12
jordanm
30k28192
add a comment |
up vote
3
down vote
accepted
You can use the getent command, which will perform the lookup based on /etc/nsswitch.conf. This means that if ldap is configured on the system, getent will attempt to lookup the user in ldap. Here is an example:
$ getent passwd 33
www-data:x:33:33:www-data:/var/www:/bin/sh
answered Jan 16 '14 at 22:12
jordanm
30k28192
add a comment |
up vote
3
down vote
accepted
up vote
3
down vote
accepted
You can use the getent command, which will perform the lookup based on /etc/nsswitch.conf. This means that if ldap is configured on the system, getent will attempt to lookup the user in ldap. Here is an example:
$ getent passwd 33
www-data:x:33:33:www-data:/var/www:/bin/sh
answered Jan 16 '14 at 22:12
jordanm
30k28192
You can use the getent command, which will perform the lookup based on /etc/nsswitch.conf. This means that if ldap is configured on the system, getent will attempt to lookup the user in ldap. Here is an example:
$ getent passwd 33
www-data:x:33:33:www-data:/var/www:/bin/sh
answered Jan 16 '14 at 22:12
jordanm
30k28192
answered Jan 16 '14 at 22:12
jordanm
30k28192
answered Jan 16 '14 at 22:12
jordanm
30k28192
answered Jan 16 '14 at 22:12
jordanm
30k28192
30k28192
add a comment |
add a comment |
up vote
0
down vote
To get the username associated with a UID, use the -n option of id:
$ id
uid=1000(myself) gid=1000(myself) groups=1000(myself), 0(wheel), 9(wsrc)
$ id -n -u 1000
myself
This would not work on GIDs though as id expects usernames or UIDs:
$ id -n -g 9
id: 9: No such user
You can query both the passwd database and the group database for UIDs and GIDs with getent:
$ getent passwd 1000
myself:*:1000:1000:Just me,,,:/home/myself:/bin/sh
$ getent group 9
wsrc:*:9:myself
The actual username or group name may be parsed out of that by piping the output through cut -d : -f 1.
id is a POSIX utility, while getent is not.
answered 2 days ago
Kusalananda
120k16225367
add a comment |
up vote
0
down vote
To get the username associated with a UID, use the -n option of id:
$ id
uid=1000(myself) gid=1000(myself) groups=1000(myself), 0(wheel), 9(wsrc)
$ id -n -u 1000
myself
This would not work on GIDs though as id expects usernames or UIDs:
$ id -n -g 9
id: 9: No such user
You can query both the passwd database and the group database for UIDs and GIDs with getent:
$ getent passwd 1000
myself:*:1000:1000:Just me,,,:/home/myself:/bin/sh
$ getent group 9
wsrc:*:9:myself
The actual username or group name may be parsed out of that by piping the output through cut -d : -f 1.
id is a POSIX utility, while getent is not.
answered 2 days ago
Kusalananda
120k16225367
add a comment |
up vote
0
down vote
up vote
0
down vote
To get the username associated with a UID, use the -n option of id:
$ id
uid=1000(myself) gid=1000(myself) groups=1000(myself), 0(wheel), 9(wsrc)
$ id -n -u 1000
myself
This would not work on GIDs though as id expects usernames or UIDs:
$ id -n -g 9
id: 9: No such user
You can query both the passwd database and the group database for UIDs and GIDs with getent:
$ getent passwd 1000
myself:*:1000:1000:Just me,,,:/home/myself:/bin/sh
$ getent group 9
wsrc:*:9:myself
The actual username or group name may be parsed out of that by piping the output through cut -d : -f 1.
id is a POSIX utility, while getent is not.
answered 2 days ago
Kusalananda
120k16225367
To get the username associated with a UID, use the -n option of id:
$ id
uid=1000(myself) gid=1000(myself) groups=1000(myself), 0(wheel), 9(wsrc)
$ id -n -u 1000
myself
This would not work on GIDs though as id expects usernames or UIDs:
$ id -n -g 9
id: 9: No such user
You can query both the passwd database and the group database for UIDs and GIDs with getent:
$ getent passwd 1000
myself:*:1000:1000:Just me,,,:/home/myself:/bin/sh
$ getent group 9
wsrc:*:9:myself
The actual username or group name may be parsed out of that by piping the output through cut -d : -f 1.
id is a POSIX utility, while getent is not.
answered 2 days ago
Kusalananda
120k16225367
edited 2 days ago
answered 2 days ago
Kusalananda
120k16225367
answered 2 days ago
Kusalananda
120k16225367
answered 2 days ago
Kusalananda
120k16225367
120k16225367
add a comment |
add a comment |
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