ubuntu server power cut/failure/outage won't boot

まず、biosでpower-on設定

次に edit /etc/default/grub

GRUB_DEFAULT=0
#GRUB_HIDDEN_TIMEOUT=0
GRUB_HIDDEN_TIMEOUT_QUIET=true
GRUB_TIMEOUT=10
GRUB_DISTRIBUTOR=`lsb_release -i -s 2> /dev/null || echo Debian`
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"
GRUB_CMDLINE_LINUX=""

そして　Remember to run update-grub after that.

https://www.google.co.jp/search?q=ubuntu+server+power+cut+boot&ie=utf-8&oe=utf-8&aq=t&rls=org.mozilla:en-US:official&client=firefox-a&channel=np&source=hp&gfe_rd=cr&ei=pSHoU7rEK6HS8gew0oGQBg
http://ubuntuforums.org/showthread.php?t=2137627
http://superuser.com/questions/375855/server-died-in-power-outage-now-wont-boot