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andy820303

03-10-2009 02:10 AM

by which command, I can look up a user name by inputing UID,

Similarly, I can use "id user_name" to get the corresponding UID, so backwards, do I have a way to look up a user_name by the corresponding UID?

Thanks
Andy

rizwanrafique

03-10-2009 03:16 AM

Not sure about any such command but you can easily find it by doing:

Code:

grep "^user:" /etc/passwd|cut -f 3 -d ":"

Replace user with the username you want to lookup.

your_shadow03

03-10-2009 03:17 AM

man id

Code:

.....

.....

      -n, --name

              print a name instead of a number, for -ugG

.....

.....

andy820303

03-10-2009 11:51 PM

Quote:

Originally Posted by your_shadow03 (Post 3470481)

man id

Code:

.....

.....

      -n, --name

              print a name instead of a number, for -ugG

.....

.....

Thanks for your info, but I think the option -n doesn't make sense here, you know, I want to get a username by its UID.

Andy

andy820303

03-10-2009 11:53 PM

Quote:

Originally Posted by rizwanrafique (Post 3470480)

Not sure about any such command but you can easily find it by doing:

Code:

grep "^user:" /etc/passwd|cut -f 3 -d ":"

Replace user with the username you want to lookup.

It's great, but I could not use it in my case, since I'm using those Linux commands from a windows system by the help of SFU(Service For Unix, a component provided by MS), so actually, I have no /etc/passwd in hands.

Thanks
Andy

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