Unreal Tournament 99 Requires a few alterations from the official server download. Because of this the LinuxGSM version of the server files includes the following.
ut-server-436.tar (Latest Official Version)
UTPGPatch451.tar.bz2 (Unofficial Patch http://www.utpg.org)
UTBonusPack.zip
UTBonusPack2.zip (maps only)
UTInoxxPack.zip
UTBonusPack4.zip
This can be downloaded here.