fedora用preupgrade升级系统找不到ISO镜像的解决方法
现在的preupgrade存在两个bug需要手动解决官网说明如下（[url]http://fedoraproject.org/wiki/Features/PreUpgrade[/url]）
Current preupgrade version is 0.9.3-3, which is available in the F7 and F8 repos. Please see bug 444497 if you have /boot on RAID1, or bug 446826 if you have /boot on your root partition.
我的boot分区划分到根分区里面，所以preupgrade下载完升级所需软件重启后提示找不到ISO镜像
解决方法如下：
官网解决方法：
Description of problem:
preupgrade on completion of first step creates an entry in the boot menu. The
kernel parameters passed here include something like
hd:sda4:boot/upgrade/stage2.img. When this menu option was selected stage2
refused to load as it could not locate stage2.img. A helpful screen appeared
with which to locate drive and path, but option entered here didnt work as well.
Added a leading '/' ie hd:sda4:/boot/upgrade and it worked.
我的解决过程：
[root@localhost ~]# gedit /etc/grub.conf
将
title Upgrade to Fedora 9 (Sulphur)
kernel /boot/upgrade/vmlinuz preupgrade lang=zh_CN.UTF-8 keymap=us stage2=hd:sda10:boot/upgrade/stage2.img method=http://ftp.jaist.ac.jp/pub/Linux/Fedora/releases/9/Fedora/i386/os
initrd /boot/upgrade/initrd.img
改成
title Upgrade to Fedora 9 (Sulphur)
kernel /boot/upgrade/vmlinuz preupgrade lang=zh_CN.UTF-8 keymap=us stage2=hd:sda10:/boot/upgrade/stage2.img method=http://ftp.jaist.ac.jp/pub/Linux/Fedora/releases/9/Fedora/i386/os
initrd /boot/upgrade/initrd.img
即stage2=hd:sda10:boot/upgrade/stage2.img中的boot改成/boot,变成stage2=hd:sda10:/boot/upgrade/stage2.img
保存grub.conf文件，重启，选择Upgrade to Fedora 9 (Sulphur)就能正常升级系统了
考虑到校园网的同学不能用AD，访问不到官网，所以将这个比较新的安装问题贴出来，希望中文搜索引擎可以搜到啦
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