Valves recent update has cause quite the mess. We are working on seeing if we can push a hotfix from our end to get the ball moving.
This update is currently causing issues across all of CSGO.
UPDATE 9/10/14 7:55PM PST:
Updated a large number of systems necessary for the Linux client.
It appears that Valve's recent update, updating the Linux client has broken all Linux servers for CSGO. At this moment in time there doesn't appear to be anything that we can do from our end to fix this.
UPDATE 9/11/14 - 7:55AM PST:
Sourcemod does not work on Linux Servers as a result of valves recent update and changes to the Linux client. This change is resulting in many communities that use custom game mechanics like Surf, DM, etc. not working anymore. We will need to wait for an update from the developers of Sourcemod.
UPDATE 9/11/14 - 8:35AM PST:
Sourcemod works now, but many required extensions of Sourcemod are still broken pending updates - XGAM3R.
UPDATE 9/12/14 - 8:50AM PST:
Everything is up and running as it should be. - XGAM3R.