you used to be able to clear out the field in the shadow file or clear out the x (iirc) in passwd, but i think default pam will stop you from doing this :)
On Wed, Aug 10, 2011 at 11:25, abdelkader belahcene
<abelahcene@gmail.com> wrote:
Hi,
I ve forgotten my root passwd on centos 6 (red hat based),
I tried to change it as I used in debian (in debian it works perfectly) , that is:
use a cd live (or installation cd1), to access the hd,
I mount my root partition and mount proc and devices
I tried the command passwd, no error reprorted, but after reboot the passwd had´t changed.
then I decided to remove passwd from /etc/shadow (delete the
second field).
OK, now I can access my machine without passwd, BUT I CAN´T GIVE ANY PASSWORD!!!! I RECEIVE THIS ERROR
# passwd
Changing password for user root.
New password:
Retype new password:
passwd: Authentication token manipulation error
any idea to fix the problem.
thanks a lot