March 29, 2010
How to recover root password with ZFS
Today with Gianluca i recovered a root password of a system with ZFS as volume manager.
The procedure is simple and composited by follow steps:
- boot from CDROM or in failsafe mode
- show the available pools to import
zpool import
- identify and import the root pool ( in this case rpool )
zpool import -f -R /tmp/rpool rpool
- configure root dataset as legacy
zfs set mountpoint=legacy rpool/ROOT/solaris
- manually mount it
mount -F zfs rpool/ROOT/solaris /mnt
- change/reset the root password
cd /mnt/etc
vi shadow
for empty password also check the directive PermitEmptyPasswords in /etc/ssh/sshd_config
Remember to reset mountpoint property for root dataset !
May 19, 2009
Retrieve ZFS zpool history commands
For this purpose i can use “zpool history” command as follow:
r
oot@global02 # zpool history rootdg_sc111
History for ‘rootdg_sc111′:
2008-09-23.12:00:56 zpool create rootdg_sc111 c16t60060E8005637A000000637A0000011Ed0
2008-09-23.12:01:01 zfs create rootdg_sc111/fs_sc111
2008-09-23.12:01:02 zfs set mountpoint=/mnt_sc111 rootdg_sc111/fs_sc111
2009-02-25.18:18:14 zpool export rootdg_sc111
2009-02-25.18:18:48 zpool import rootdg_sc111
2009-04-09.14:46:31 zfs snapshot rootdg_sc111/fs_sc111@now
This is powerful!
I can see how this pool and filesystem were created!
