sudo mount /dev/sda1 /mnt
yhusha@yhusha-AOD260:~$ chroot /mnt
chroot: cannot change root directory to /mnt: Operation not permitted
yhusha@yhusha-AOD260:~$ sudo umount /dev/sda1 /mnt
umount: /mnt: not mounted
yhusha@yhusha-AOD260:~$ mkdir /tmp/live
yhusha@yhusha-AOD260:~$ sudo mount -o loop ~/Desktop/ubuntu-12.04.1-desktop-i386.iso /tmp/live
mount: warning: /tmp/live seems to be mounted read-only.
yhusha@yhusha-AOD260:~$ mkdir ~/live
yhusha@yhusha-AOD260:~$ mkdir ~/live/usb
yhusha@yhusha-AOD260:~$ cp /tmp/live/casper/filesystem.s
filesystem.size      filesystem.squashfs
yhusha@yhusha-AOD260:~$ mkdir /casper
mkdir: cannot create directory `/casper': Permission denied
yhusha@yhusha-AOD260:~$ sudo mkdir /casper
yhusha@yhusha-AOD260:~$ cp /tmp/live/casper/filesystem.squashfs /mnt
cp: cannot create regular file `/mnt/filesystem.squashfs': Permission denied
yhusha@yhusha-AOD260:~$
yhusha@yhusha-AOD260:~$
yhusha@yhusha-AOD260:~$ sudo cp /tmp/live/casper/filesystem.squashfs /casper
yhusha@yhusha-AOD260:~$ sudo mkdir /casper/chroot
yhusha@yhusha-AOD260:~$ sudo mount -o loop -t squashfs /casper/filesystem.squashfs /mnt
mount: warning: /mnt seems to be mounted read-only.
yhusha@yhusha-AOD260:~$ sudo rsync -ax /mnt/. /casper/chroot/.
yhusha@yhusha-AOD260:~$ sudo umount /mnt
yhusha@yhusha-AOD260:~$ gksu gedit /casper/chroot/usr/share/initramfs-tools/scripts/casper
yhusha@yhusha-AOD260:~$ sudo cp -L /etc/resolv.conf /casper/chroot/etc/
yhusha@yhusha-AOD260:~$ sudo mount -t proc none /casper/chroot/proc
yhusha@yhusha-AOD260:~$ sudo mount -o bind /dev /casper/chroot/dev
yhusha@yhusha-AOD260:~$ sudo chroot /casper/chroot /bin/bash
root@yhusha-AOD260:/# apt-get autoclean
Reading package lists... Done
Building dependency tree
Reading state information... Done
root@yhusha-AOD260:/# apt-get autoremove
Reading package lists... Done
Building dependency tree
Reading state information... Done
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
root@yhusha-AOD260:/# apt-get clean
root@yhusha-AOD260:/# update initramfs
No command 'update' found, did you mean:
 Command 'xupdate' from package 'libxml-xupdate-libxml-perl' (universe)
 Command 'uupdate' from package 'devscripts' (main)
 Command 'lupdate' from package 'qt4-linguist-tools' (main)
 Command 'lupdate' from package 'qt3-dev-tools' (main)
update: command not found
root@yhusha-AOD260:/# sudo apt-get update initramfs
E: The update command takes no arguments
root@yhusha-AOD260:/#