 | | | command to list all members of a group? | command to list all members of a group? 2004-07-06 - By Matt Brodeur
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On Tue, Jul 06, 2004 at 12:39:38PM -0400, Scot L. Harris wrote:
> On Tue, 2004-07-06 at 12:17, Matt Brodeur wrote:
> >
> > $ awk -v FS=':' '/^GROUPNAME/ { print $4 }' /etc/group
>
> why not:
>
> grep groupname /etc/group
>
> Replace groupname by the name of the group you are looking for.
Because I wanted to be clever, that's why. ;)
What my command is doing is searching for a line starting with the
group name, then printing the fourth colon-delimited field. The net
effect is that you get a comma separated list of the users in the
group, and nothing else. It's functionally equivalent to this:
$ grep '^GROUPNAME' /etc/group | cut -f4 -d':'
This could be improved by changing the search expression to this:
'^GROUPNAME\:'
...so that you would avoid the case where you're searching for a group
name that's part of another name (eg, web vs. webmaster). If you were
to leave out the caret and the colon you'd match on both the group
you're looking for AND any group with a member by the same name. A
quick check on this system shows that "mbrodeur" appears on seven
lines of the group file, once for the "mbrodeur" group, and in six other
groups that I'm a member of.
- --
Matt Brodeur RHCE
MBrodeur@(protected) http://www.NextTime.com
Political T.V. commercials prove one thing: some candidates can tell
all their good points and qualifications in just 30 seconds.
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