Adding Users Command line 2006-10-17 - By Bob McClure Jr
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On Tue, Oct 17, 2006 at 01:16:14PM -0700, Bret Stern wrote:
>
>
> When adding users from the (command line)
>
> useradd
>
> has an option -r which assigns a specific user id.
Nope, that tells it to assign a "system-level" user id number, usually
less than 500 or 1000. These are designed for pseudo users assigned
to subsystems and processes like mysql, procmail, backup, bin, et al.
> Is it common to explicitly assign a user id?
Only if you want to make it the same as on another system or to force
a duplicated UID.
> What happens if I don't specifically assign a user id?
It takes the next available UID in the desired range. That's usually
figured by taking the highest occupied UID in the range and adding
one.
> I'm assuming two users cannot have the same user id,
> so..how would you know the user id's of all your users?
You don't need to, but if you must, look at the third field (delimited
by ':') in /etc/passwd. Unless you have some good reason to specify a
UID, just let the system assign one.
> Thanks
Cheers,
--
Bob McClure, Jr. Bobcat Open Systems, Inc.
bob@(protected) http://www.bobcatos.com
"Where you go in the hereafter depends on what you were after here."
- Thanks to Graffiti, 2 March 2004
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