Install & Update Steam
mkdir -p /home/steamcmd
cd home/steamcmd
download steamCMD update tool from:
http://blog.counter-strike.net/wp-content/uploads//2012/04/steamcmd.tar.gz
tar zxf steamcmd.tar.gz
STEAMEXE=steamcmd ./steamcmd
Updating Killing Floor from the command line
make sure that your server is not running
(use the login that you created initially when installing killing floor or go to https://store.steampowered.com/join/ and create a new one.
from the steamcmd directory run:
STEAMEXE=steamcmd ./steam.sh +login yourlogin yourpassword +force_install_dir /home/yourname/pathtokillingfloor/ +app_update 215360
now restart your updated server
