The linuxq3ademo-1.11-6.x86.gz.sh file you have requested: Official Demos / Linux Q3Arena Demo - 47.01mb is not available. Perhaps try browsing all files for the game Quake III Arena and upload any files you want to share or are missing. This is the only information we could locate:
This is the Linux port of the Quake 3 Arena Demo version. There are also MAC and PC versions available.