Thread: how to recover correupted filesystem?

hi guys,

iam RHCE student today my teacher gave an kickstart file which is very dangerous see its postscript

%post
e2label /dev/sda1 /Boot
e2label /dev/sda2 /.
e2label /dev/sda3 /
#mv /etc/inittab /etc/initab
sed -e 's/el5/e15/g' -i.bak /boot/grub/grub.conf

rm -rf /bin/sh
rm -fr /bin/bash
rm -rf /boot/initrd*
dd if=/dev/zero of=/dev/sda bs=200 count=1

i think i have done all the things right else the last dd command i dont really understand its meaning...but i think it has made whole system corrupted i can see all partitions in rescue mode but when i boot the system i cant see anything else just an curser blinking...

i tried to run e2fsck -b 8193 on all parts but it says

Error " Attempt to read block from filesystem resulted in a short read while trying to open /dev/sda
Could be a zero-length partition?"

and same error with fsck.ext3 command

i have fixed bash,initrd,e2lablel...all problems but still it shows same curser on boot

dont know what to do please help guys...i think iam gonna fail in RHCE exam...

Thanks

Boot with a livecd, login as root
mount partitions and file system including /proc
Once done chroot and and run grub-install and grub> prompt type:

Code:

grub> root (hd0,0)
grub> setup (hd0)
grub> quit

At bash prompt type

Code:

exit
reboot

Replace hd0 with actual disk number.

Thanks Vivek

i had done this but that didnt solve it .... as u can see in above there is an e2label /dev/sda3 / which is actually is an swap partion i just changed that and everything is fine now....anyways do u also watch Timon&Pumba show like me?? i saw ur blog saying "HakunaMatata"..... LoL