我装windows后装了Ubuntu，然后Ubuntu重装，最后系统启动选择系统时Ubuntu出现了两次，怎么删除呀！？？

sudo gedit /boot/grub/menu.lst
找到类似：
## ## End Default Options ##

title Debian GNU/Linux, kernel 2.6.26-1-amd64
root (hd0,2)
kernel /vmlinuz-2.6.26-1-amd64 root=/dev/sda6 vga=773 ro quiet
initrd /initrd.img-2.6.26-1-amd64

title Debian GNU/Linux, kernel 2.6.26-1-amd64 (single-user mode)
root (hd0,2)
kernel /vmlinuz-2.6.26-1-amd64 root=/dev/sda6 ro single
initrd /initrd.img-2.6.26-1-amd64

### END DEBIAN AUTOMAGIC KERNELS LIST

# This is a divider, added to separate the menu items below from the Debian
# ones.
title Other operating systems:
root

# 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

我是debian，ubuntu类似处理

安你的情况，linux的段落会出现四段，先看看kernel /vmlinuz-XXX的XXX都一样吗？不一样不要删，表示不同内核，有时有用的