安裝Windows和Linux雙系統，啟動由linux的grub來引導，預設進入linux。如果要啟動win系統，在啟動的時候按下鍵選擇啟動win系統，可以修改/etc/grub.conf檔案來實現切換：

以root身份登入Linux系統

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vim /etc/grub.conf

#開啟grub.conf啟動檔案

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# grub.conf generated by anaconda

#

# Note that you do not have to rerun grub after making changes to

this file

# NOTICE: You have a /boot partition. This means

that

# all kernel and initrd paths are relative to /boot/,

eg.

# root (hd0,8)

# kernel /vmlinuz-version ro

root=/dev/VolGroup00/LogVol00

# initrd /initrd-version.img

#boot=/dev/hdc

default=0#啟動的系統

#default=0代表預設啟動序號為0的系統Linux，改成1即可預設啟動win系統

timeout=5 #等待時間

#修改啟動系統等待時間，可以有機會再開機的時候選擇Linux還是Windows

splashimage=(hd0,8)/grub/splash.xpm.gz

hiddenmenu #隱藏menu

title Fedora Core

(2.6.18-1.2798.fc6) #default=0

root (hd0,8)

kernel /vmlinuz-2.6.18-1.2798.fc6 ro

root=/dev/VolGroup00/LogVol00 rhgb quiet

initrd /initrd-2.6.18-1.2798.fc6.img

title Other#default=1 windows7

rootnoverify (hd0,0)

chainloader +1