to kill enemy with your knife, press left click 2x then right click 1x! it'll give 100 % damage!
Counter-Strike has a console. Did you enable it in options/keyboard/advanced?
When you are Terrorist, press 5 and hold down your left mouse button.
press k ... that's the default button ... keep it pressed n speak
Press e. ---- The default should be 'e' unless you have changed it. Use can be used as opening doors, if you are CT Forces, you can press the 'use' button at a hostage and you will get money and the hostages will follow you. If the button 'e' does not work, go to options and go to keyboard and find use. Hayato
press esc
Press number 6 on your keyboard you will get the bomb in your hands get to bomb site and hold shoot button to plant it.
Press g
The console is used for just about everything, from your speed and the map gravity to kicking and killing players. To open the console press ~ by default. If this doesn't work, Options > Keyboard > Advanced > Enable Developer Console (~) Basic commands can be found here... http://gamegate2k.com/half-life2/counter-strike-source/server-console-commands-css/
Press F5 - ingame
you press A and X
You press a button
E