Or, if you have a lot of time, you can look i to "jack the ripper" . I had
similar situation earlier this month (forgot my pass).
Full dosclosure- After 5hours of reading and configuring it to crack my
pass, i gave up and reset it(pass).

On Tue, Jun 23, 2020, 10:35 Konstantin Olchanski <[log in to unmask]> wrote:

> On Tue, Jun 23, 2020 at 10:49:48AM +0200, Elio Fabri wrote:
> > Hi all,
> > I need help (at lest a link) as to how to recover my root password.
> > I'm using SL6.2. The password I remember by heart is no longer
> > accepted, neither for the su command nor for sudo.
> > Thx
>
> While you cannot "recover" the root password, if you have physical access
> to the machine, you can bypass it, login as root and reset the password:
> remove the boot disk from problem machine, attach it to a 2nd computer,
> mount the root partition, go to root/.ssh and install your ssh key.
> unmount,
> reassemble problem computer, boot, ssh into root, done. While the boot disk
> is mounted on the 2nd computer, in addition to installing the ssh key,
> you can also reset the password (edit /etc/shadow) or setup "sudo" for
> password-less "sudo root" (recent Ubuntu are setup this way, you never
> actually
> use the root password to login into root).
>
> --
> Konstantin Olchanski
> Data Acquisition Systems: The Bytes Must Flow!
> Email: olchansk-at-triumf-dot-ca
> Snail mail: 4004 Wesbrook Mall, TRIUMF, Vancouver, B.C., V6T 2A3, Canada
>