On Mon, 2010-03-01 at 17:03 +0100, Niki Kovacs wrote:
> 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 ?
>
Try this:
grep -q medintux /etc/group || groupadd medintux
> Thanks,
>
> Niki
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