On Wed, Aug 10, 2011 at 11:25 AM, abdelkader belahcene <abelahc...@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
Definitely the wrong newsgroup, but: * boot with CentOS, RHEL, or Scientific Linux rescue CD * Select "linux rescue" or rescue mode from the CD boot process. * Allow it to mount your old system at /mnt/sysimage with all the relevant /dev and /dev/sys utilities under it. * Do "chroot /mnt/sysimage" to enter the environment of the mounted directories, in a chroot cage. * THEN do "passwd root" * Exit the chroot. (Just type "exit"). * Sync the disk changes, just as a precaution. (Just type "sync") * Reboot and eject CD. I generally setup PXE to make these tools available without a CD in large environments,. The "chroot" business is core to updating messed up grub configurations, password files, kernels, fstab, or core system libraries. > 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 > -- To UNSUBSCRIBE, email to debian-user-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org Archive: http://lists.debian.org/caocn9rwfnvvgrs7c3zcyask-be070x-kzr3oso8g4ptxhpo...@mail.gmail.com