Ubuntu uses X Display Manager(xdm、gdm、kdm or wdm) to startup X-Window, if we want to disabled X-window, we need to disable X Display Manager.


check run level

    # output N 2

rename X Display Manager

base on runlevel (2), we can found the file name like S30gdm under /ect/rc2.d, this is X Display Manager. we rename it to _s30gdm, and reboot.

file name pattern


  • S for start up, K or shut down
  • 30 : priority, maybe difference with yours
  • gdm : a kind of X Display Manager.