On some systems you need to specify LD_LIBRARY_PATH, like:

LD_LIBRARY_PATH=. LD_PRELOAD=libcod2_1_3_nomysql.so ./cod2_lnxded ...

If that doesn't help, follow the proper tutorial: https://killtube.org/showthread.php?...u-14-04-server

If you are using one of those years-old precompiled .so's, compile it yourself