Sven Co-op is a modification that allows co-operative multiplayer (where players fight together against monsters/etc.) in Half-Life. It also adds some features to make co-op play more interesting.
It adds the Uzi code that it seems was left out of the last release accidentally... so now you'll actually be able to get the Uzi/s on Linux servers :). Please note that only people actually running SvenCo-op servers under Linux need to download this file
SvenCo-op v1.9 Linux Server - Full Install. You MUST copy the pak0.pak file from a Windows version of HL to your svencoop/ directory after extracting!