How to tell if a user is a group member in a script?

Matthew Burgess matthew at
Wed Oct 20 15:13:59 PDT 2004

Kevin P. Fleming wrote:
> I have a need to determine (in a bash script) whether the current user 
> is a member of a given group, and I don't really want to parse 
> /etc/group myself.
> Anyone have any quick suggestions?

I can cheat :)  You said you didn't want to parse /etc/group.  How about 
parsing /etc/passwd instead then to get a list of users :)  You can then 
loop over that list and run 'groups' on them :)



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