Chroot

Suppose that a directory /dir contains a system (file hierarchy). To change root to it (without booting and logging):

• Boot from a rescue CD or USB disk, e.g., Slackware Setup disk
• # for i in /dev /dev/pts /proc /sys; do mount --bind $i /dir$i; done
• # chroot /dir

To exit from chroot:

• # exit
• # for i in /sys /proc /dev/pts /dev; do umount /dir$i; done

In /etc/fstab the pseudo filesystems can be mounted as follows:

/dev     /dir/dev     auto bind 0 0
/dev/pts /dir/dev/pts auto bind 0 0
/sys     /dir/sys     auto bind 0 0
/proc    /dir/proc    auto bind 0 0