2014-10-09 ubuntu lightdm disable/enable http://askubuntu.com/questions/16371/how-do-i-disable-x-at-boot-time-so-that-the-system-boots-in-text-mode http://askubuntu.com/questions/139014/how-to-disable-lightdm http://ubuntuforums.org/showthread.php?t=1911143teeコマンド http://blog.layer8.sh/ja/2011/12/21/%E3%83%95%E3%82%A1%E3%82%A4%E3%83%AB%E5%87%BA%E5%8A%9B%E3%81%A8%E3%82%B9%E3%82%AF%E3%83%AA%E3%83%BC%E3%83%B3%E5%87%BA%E5%8A%9B%E3%82%92%E5%90%8C%E6%99%82/