How to check that if a package is installed?

[Hal Burgiss]

On Tue, Nov 30, 2010 at 7:54 AM, S Mathias <smathias1972 at yahoo.com> wrote:

> if [ "$(dpkg -l | awk '/tofrodos/ && /^ii/ {print $2}' | awk
> '/^tofrodos/')" == "" ]; then echo -e "error: no zip package
> detected\!\n\nYou could install it like e.g.: \"apt-get install tofrodos\"";
> fi
>
> Is there a better way then this?
>
>
Seems kind of wordy to me for what it really does ...

dpkg -l |grep torfrodos || echo nope


-- 
Hal
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