how recover /etc/fstab

dineshdhiman · 09-20-2011, 05:40 AM

hi friends
plz help me
I am using rhel6....
i have accidentlly deleted my fstab file.
help me to recover it.....if any one have the solution please post it.

repo · 09-20-2011, 06:29 AM

Did you rebooted the system, or is it still running?
Do you have a backup?

Kind regards

unSpawn · 09-20-2011, 06:38 AM

dineshdhiman · 09-20-2011, 07:24 AM

sir i reboot my system and i try to recover but i cant plz help me

dineshdhiman · 09-20-2011, 07:26 AM

and i have no backup of fstab

TB0ne · 09-20-2011, 08:58 AM

Quote:

Originally Posted by dineshdhiman

sir i reboot my system and i try to recover but i cant plz help me

and i have no backup of fstab

Well, your only chance would be to try to manually mount the partitions one at a time (go into fdisk, and print the partition table, to get an idea of what partitions may be which devices). From there, you can try to create an fstab manually.

Otherwise, you've now learned the importance of having backups, and you may have to reload/reinstall your OS. If you made a separate partition of your /home, you don't have to format that at build time, so you can save that data.

unSpawn · 09-20-2011, 09:22 AM

...in addition fdisk shows devices but not partition labels (as in 'disktype '/dev/devicename' or 'ls -l /dev/disk/by-label'). On simple disks, using something like

Code:

for DISK in /dev/{h,s}d[a-z]; do
 fdisk -l $DISK|awk '/Linux$/ {print $1}'|while read PART; do
  LABEL=$(tune2fs -l $PART|awk -F':' '/Filesystem volume name:/ {print $2}')
  echo "${PART} ${LABEL// /} ext2 defaults 0 0"; done; done

may show Linux (0x83) partitions and their labels, *if* you gave them usable names. You probably also want to add the

Code:

tmpfs      /dev/shm tmpfs  mode=1777 0 0
devpts     /dev/pts devpts gid=5,mode=620 0 0
sysfs      /sys     sysfs  defaults 0 0
proc       /proc    proc   defaults 0 0

entries to /etc/fstab.

* And apart from the valuable lesson wrt having backups you've also learned that next time you mess around you do it as unprivileged user and not root.