I had followed this tutorial:
when i was trying to start the game using this command:
./srcds_run -game csgo -console -usercon +game_type 0 +game_mode 0 +mapgroup mg_bomb +map de_dust
i came across an error:
I had some odd library issues running HL2DM servers on Ubuntu, I tried it on Debian 7 and it worked right out of the box. Not the best solution but if you don't mind reinstalling the OS or trying it in a VM to test it, it worked for me.
nah its not a problem to re-install it, because i was trying to run it on a vps, thx for the help
.......after a while.......
thx now it works :DDD