mint@mint ~ $ sudo mount /dev/sda4 /mnt
mint@mint ~ $ sudo mount –bind /dev /mnt/dev
Usage: mount -V                 : print version
       mount -h                 : print this help
       mount                    : list mounted filesystems
       mount -l                 : idem, including volume labels
So far the informational part. Next the mounting.
The command is `mount [-t fstype] something somewhere'.
Details found in /etc/fstab may be omitted.
       mount -a [-t|-O] ...     : mount all stuff from /etc/fstab
       mount device             : mount device at the known place
       mount directory          : mount known device here
       mount -t type dev dir    : ordinary mount command
Note that one does not really mount a device, one mounts
a filesystem (of the given type) found on the device.
One can also mount an already visible directory tree elsewhere:
       mount --bind olddir newdir
or move a subtree:
       mount --move olddir newdir
One can change the type of mount containing the directory dir:
       mount --make-shared dir
       mount --make-slave dir
       mount --make-private dir
       mount --make-unbindable dir
One can change the type of all the mounts in a mount subtree
containing the directory dir:
       mount --make-rshared dir
       mount --make-rslave dir
       mount --make-rprivate dir
       mount --make-runbindable dir
A device can be given by name, say /dev/hda1 or /dev/cdrom,
or by label, using  -L label  or by uuid, using  -U uuid .
Other options: [-nfFrsvw] [-o options] [-p passwdfd].
For many more details, say  man 8 mount .
mint@mint ~ $ sudo mount --bind /dev /mnt/dev
mint@mint ~ $ sudo mount --bind /proc /mnt/proc
mint@mint ~ $ :P
:P: command not found
mint@mint ~ $ sudo chroot /mnt
chroot: failed to run command `/bin/bash': Exec format error
mint@mint ~ $ sudo mount -v --bind /sys /mnt/sys
/sys on /mnt/sys type none (rw,bind)
mint@mint ~ $ sudo chroot /mnt
chroot: failed to run command `/bin/bash': Exec format error
mint@mint ~ $