1, qmount not found, where can i found it? does it func the same as mount? I didn't specify it since I have already written about a chroot enviroment, I have added the package name in case. 2, the folder /floppy exists, does it matter? Nothing to worry about, you're modifying the /floppy dir AFTER you have mounted the partition, so you're editing the mounted file. floppy is just a folder used to prepare the chroot.