Re: root password

[Scott Doty <scott@xxxxxxxxx>]

On 02/06/2012 06:47 PM, Boris Epstein wrote:

On Mon, Feb 6, 2012 at 9:14 PM, Bruno Wolff III <bruno@xxxxxxxx> wrote:

On Tue, Feb 07, 2012 at 07:43:37 +0530,
 Amit Rp <amitrp01@xxxxxxxxx> wrote:
> I forgot the root password. Please advise whether there is any possibility
> of retrieving  it?

It's normally easier to boot into single user mode and change it to something
new than to try to recover it.

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100%.

Yet another way is to boot off of a CD or USB stick and manually edit the /etc/shadow file in the root partition - but that is more cumbersome.

Protip:  If you're booting a cd or stick, no need to manually edit the target system's /etc/shadow.  When you mount the system's / partition, chroot there, then just run passwd.

And honestly, chroot(1) is perfect for working on systems under different filesystem hierarchies.  For example, I use it to update ltsp's nfs root on occasion:

# # on the nfs server:
# setarch i686 chroot /opt/ltsp/i386 /bin/bash

Fun, no? :)

 -Scott
p.s. for even more fun, try wrapping your head around pivot_root(8)... :)

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