[CentOS] Slightly OT: check creation of a group
Laurent Wandrebeck
l.wandrebeck at gmail.comMon Mar 1 16:08:16 UTC 2010
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2010/3/1 Niki Kovacs <contact at kikinovak.net>: > Hi, > > I'm currently writing an install script for an application, and my > already limited Bash skills are a bit rusty. > > I want to check if a group exists, and if it doesn't, then create it. > > Only thing I found is: > > if [ grep medintux /etc/group ]; then > continue > else > groupadd medintux > fi > > Apparently I can't seem to "negate" the test, e. g. something like > > if !(grep medintux /etc/group) > > Any suggestions for the correct syntax here ? > > Thanks, > > Niki Why don't you use groupadd -f ? It will not override the group if it already exists, and shortens the code :) Laurent
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