OK. Copy and paste Your plugins.ini (this one in metamod directory). Make sure Your podbot directory is placed in ...\cstrike\addons directory.
For linux - the latest *.so file You can find here:
http://forums.bots-united.com/showthread.php?t=3170
(also some sticky, BTW)
I guess - if You have been reading the doc from filebase, You did everything OK and You know - this *.so file is not only one file You need, but You need also something else (waypoints, configs, some chat files etc...) and You took them from filebase and placed everything in correct place. Maybe make a screenshot of Your Linux Explorer (or something like this) browsing Your podbot directory, save it as a jpg file and post it to show me (I would like to be sure my-self if everything is placed correctly , sorry).