Chroot: Difference between revisions

Latest revision as of 14:30, 27 December 2023

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

To exit from chroot:

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

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

@@ Line 1: / Line 1: @@
+Suppose that a directory <code>/mnt</code> 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
-* <code># mkdir /dir</code>
+* <code># for i in /dev /dev/pts /proc /sys; do mount --bind $i /mnt$i; done</code>
-* <code># mount /dev/sdaX /dir</code> (substitute /dev/sdaX with your root device name)
+* <code># chroot /mnt</code>
-* <code># for i in /dev /dev/pts /proc /sys; do mount --bind $i /dir$i; done</code>
+To exit from chroot:
-* <code># chroot /dir</code>
-* Repair the boot loader, for example, for LiLO:
-** <code># vi /etc/lilo.conf</code> (if needed)
-** <code># lilo -v</code>
 * <code># exit</code>
-* <code># for i in /sys /proc /dev/pts /dev; do umount /dir$i; done</code>
+* <code># for i in /sys /proc /dev/pts /dev; do umount /mnt$i; done</code>
-* <code># umount /dir</code>
-* <code># reboot</code>
+In <code>/etc/fstab</code> the pseudo filesystems can be mounted as follows:
+<pre>
+/dev     /mnt/dev     auto bind 0 0
+/dev/pts /mnt/dev/pts auto bind 0 0
+/sys     /mnt/sys     auto bind 0 0
+/proc    /mnt/proc    auto bind 0 0
+</pre>
 [[Category: Linux]]