在win7系统基础上，装fedora 15后，系统启动由fedora的grub来引导，不作选择，则默认进入fedora。更改启动设置需要修改/boot/grub/grub.conf文件： 

 # 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    #启动的系统
timeout=5   #等待时间
splashp_w_picpath=(hd0,8)/grub/splash.xpm.gz
hiddenmenu  #隐藏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