特别值得一提的是Ubuntu GRUB有很多值得学习的地方，这里我们主要介绍Ubuntu GRUB，包括介绍Ubuntu GRUB等方面。Ubuntu GRUB負責管理啟動Linux還是Windows,該如何修改Ubuntu GRUB開機選項呢?
Introduction為什麼需要更改Ubuntu GRUB呢?
1.當Ubuntu更新新的kernel後,Ubuntu GRUB會自動加上新的kernel開機選項,導致開機選項越來越多,想將不必要的開機選項刪除.
2.Ubuntu GRUB預設開機為Ubuntu,你可以想將預設開機改成Windows.
3.修改預設Ubuntu GRUB等待時間.
4.預設不顯示GRUB menu,直接進入Windows.
假如你有以上需求,就得手動修改Ubuntu GRUB開機選項.Solution開啟Ubuntu GRUB開機選項檔sudo gedit /boot/grub/menu.lstQ1.當Ubuntu更新新的kernel後,Ubuntu GRUB會自動加上新的kernel開機選項,導致開機選項越來越多,想將不必要的開機選項刪除.
A1.以下為我所要的開機選項,不需要者可自行刪除之End Default Options
- title Ubuntu, kernel 2.6.20-16-generic
- root (hd0,6)
- kernel /boot/vmlinuz-2.6.20-16-generic root=UUID=b923ef76-3246-411c-8095-7bca666b13a5 ro quiet splash
- initrd /boot/initrd.img-2.6.20-16-generic
- quiet
- savedefault
- title Ubuntu, kernel 2.6.20-16-generic (recovery mode)
- root (hd0,6)
- kernel /boot/vmlinuz-2.6.20-16-generic root=UUID=b923ef76-3246-411c-8095-7bca666b13a5 ro single
- initrd /boot/initrd.img-2.6.20-16-generic
- # This entry automatically added by the Debian installer for a non-linux OS
- # on /dev/sda1
- title Microsoft Windows XP Professional
- root (hd0,0)
- savedefault
- makeactive
- chainloader +1
Q2.Ubuntu GRUB預設開機為Ubuntu,你可以想將預設開機改成Windows.A2.修改
- ## default num
- # Set the default entry to the entry number NUM. Numbering starts from 0, and
- # the entry number 0 is the default if the command is not used.
- #
- # You can specify 'saved' instead of a number. In this case, the default entry
- # is the entry saved with the command 'savedefault'.
- # WARNING: If you are using dmraid do not change this entry to 'saved' or your
- # array will desync and will not let you boot your system.
default 2預設default為 0,表示開機用Ubuntu開機,因為在我的電腦Windows為第三個選項,故default為2Q3.修改預設Ubuntu GRUB等待時間.A3.修改
- ## timeout sec
- # Set a timeout, in SEC seconds, before automatically booting the default entry
- # (normally the first entry defined).
timeout 3預設為10秒鐘,我改成等待3秒鐘Q4.預設不顯示Ubuntu GRUB menu,直接進入Windows.
- ## hiddenmenu
- # Hides the menu by default (press ESC to see the menu)
- hiddenmenu
預設會顯示Ubuntu GRUB menu,若你不想顯示menu,要當按下ESC才顯示,請將hiddenmenu前的#拿掉
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