linux 学习笔记： 更换wubi image

将用dd生成的*。disk文件， copy 到 /ubuntu/disks/, rename to root.disk

boot to wubi, in grub menu, don't use the old menu, go into the command shell of grub

insmod part_msdos # support fat file system

insmod ntfs # support ntfs

set root='(hd0,msdos1)' # if not sure, use ls to check current disks, and find out which disk contains the /ubuntu/disks

search --no-floppy --fs-uuid --set=root 5A34xxx # if the last step of set root is correct, this step is not necessary, but if we use the search command to double confirm,

                                                # make sure the UUID is correct (use 'ls' command to check and confirm)

loopback loop0 /ubuntu/disks/root.disk # by the way, if in this step, you wanna boot to other *.disk file, like root_old.disk, it's ok and possibled, I've tested OK.

set root=(loop0)

linux /boot/vmlinuz-x.x.x.x-generic root=UUID=5A34xxx loop=/ubuntu/disks/root.disk ro splash vt.handoff=7

initrd /boot/initrd.img-3.x.x.x.-generic

 

# finally run boot

boot

 

 

After boot successful,  remember to modify the /boot/grub/grub.cfg file to make the changes of grub perminently, and make a backup of grub.cfg to make sure it won't lost.

I tried to use sudo update-grub to auto generate the grub.cfg, but failed, don't know why.

 

BTW, the grub.cfg is read-only, before change it, use chmod 777 to remove the readonly attributes