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While updating ubuntu my system crashed and after restarting and entering to ubuntu I get the message Root filesystem check failed.Very much similar to the post Ubuntu 13.04 to 13.10: Filesystem check or mount failed. I tried to fix it with the instruction mentioned there as 

mount -o remount,rw /
dpkg --configure -a
mount -o remount,ro /
sync
reboot

But the problem is after executing mount -o remount,rw / I get:

mount: cannot remount block device /host/ubuntu/disks/root.disk read-write.
is write-protected.

After executing dpkg --configure -a I get:

dpkg: error: unable to access dpkg status area: Read-only file system.

After executing the remaining commands, nothing happens apart from a reboot at the end.
Can somebody please suggest a fix.

Community
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Rahul Patel
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2 Answers2

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Boot from a live CD or USB and supposing that your HDD will be /dev/sda, issue this command

sudo fsck.ext4 -p -f /dev/sda1

assuming that your root partition is the first one, and you have ext4 on it.

Frantique
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Seems that u forgot to add sudo before your commands.You need to be root user if you want to remount( idk if you just ignored the sudos HERE for typing faster)

leighton
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