Enter the console on the server machine and enter "sv_cheats 1". Then, change maps by typing "changelevel dust" (or any other map). Finally, enter one of the following codes at the console to activate the corresponding cheat function:

Result	Code
$16,000	impulse101
Arctic sniper rifle	givespaceweapon_awp
Auto-aim with sniper rifle	sv_aim
Adjust gravity	sv_gravity [-999 - 999999]
See and fire through walls	gl_zmax[0-9999]
View other players' frags	cl_hidefrags 0
Faster forward motion	cl_forwardspeed 999
Faster backwards motion	cl_backspeed 999
Faster side motion	cl_sidespeed 999
Level select	changelevel [map name]
Weapon select	give weapon_[weapon name]