What files are in the directory? when you say extract I assume .tar.gz file. Usually the readme will say what to do, exactly. Sometimes they come with a script which will walk you through the installation. I have never done a Citrix install on Linux so I'm not sure. If you see a configure file in the directory you can run that
./configure
make
make install
if it was a .rpm file then and you installed (rpm -Uvh ica-citrix-XXXX) it then you just need to find the executeable for that software, look for the place it installed to and find any files with an * they can be executed.
I have used the client and server on NT/2000 before but never in Linux. Hope that helps a little bit
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