xubuntu@xubuntu:~$ sudo fdisk -l

Disk /dev/sda: 160.0 GB, 160041885696 bytes
255 heads, 63 sectors/track, 19457 cylinders, total 312581808 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x8f038f03

   Device Boot      Start         End      Blocks   Id  System
/dev/sda1   *        2048   292923125   146460539    7  HPFS/NTFS/exFAT
/dev/sda2       292923390   312580095     9828353    5  Extended
/dev/sda5       292923392   308420607     7748608   83  Linux
/dev/sda6       308422656   312580095     2078720   82  Linux swap / Solaris
xubuntu@xubuntu:~$ mkdir /mnt/xubuntu
mkdir: cannot create directory ‘/mnt/xubuntu’: Permission denied
xubuntu@xubuntu:~$ sudo mount /dev/sda5 /mnt/xubuntu
mount: mount point /mnt/xubuntu does not exist
xubuntu@xubuntu:~$ sudo mkdir /mnt/xubuntu
xubuntu@xubuntu:~$ sudo mount /dev/sda5 /mnt/xubuntu
xubuntu@xubuntu:~$ sudo mount -t proc none /mnt/xubuntu/proc
xubuntu@xubuntu:~$ sudo mount --rbind /sys /mnt/xubuntu/sys
xubuntu@xubuntu:~$ sudo mkdir /mnt/xubuntu
mkdir: cannot create directory ‘/mnt/xubuntu’: File exists
xubuntu@xubuntu:~$ sudo mount /dev/sda5 /mnt/xubuntu
mount: /dev/sda5 already mounted or /mnt/xubuntu busy
mount: according to mtab, /dev/sda5 is already mounted on /mnt/xubuntu
xubuntu@xubuntu:~$ sudo mount -t proc none /mnt/xubuntu/proc
mount: none already mounted or /mnt/xubuntu/proc busy
mount: according to mtab, none is already mounted on /mnt/xubuntu/proc
xubuntu@xubuntu:~$ sudo mount --rbind /sys /mnt/xubuntu/sys
xubuntu@xubuntu:~$ sudo mount --rbind /dev /mnt/xubuntu/dev
xubuntu@xubuntu:~$ sudo cp /etc/resolv.conf /mnt/xubuntu/etc/resolv.conf
xubuntu@xubuntu:~$ sudo chroot /mnt/xubuntu /bin/bash
root@xubuntu:/# source /etc/profile
root@xubuntu:/#