How does one run fsck?

jim_d · 05-13-2012, 01:04 PM

Do I understand this correctly?:

fsck cannot be run on a mounted volume--specifically the volume that contains the Linux root filesystem.

So how do you run fsck on the Linux filesystem? If you umount the root filesystem, do commands still work?

Thanks--

spiky0011 · 05-13-2012, 01:32 PM

Here's a usefull page
http://jamesmcdonald.id.au/it-tips/g...ntu-disk-stuff

btmiller · 05-13-2012, 03:14 PM

Generally I boot off of some sort of rescue disk if I need to fsck the root filesystem. In principle, one can also remount it read onlu ("mount -o remount,ro /"), but I always find it much safer to boot off other media and have it completely unmounted.

jim_d · 05-14-2012, 08:41 PM

btmiller:
"Generally I boot off of some sort of rescue disk if I need to fsck the root filesystem. In principle, one can also remount it read onlu ("mount -o remount,ro /"), but I always find it much safer to boot off other media and have it completely unmounted."

So I could boot from an Install/LiveCD, and then use the terminal window? I'm assuming the file system on the hard drive is not mounted when booting fr/LiveCD, correct?

Thanks--

frankbell · 05-14-2012, 08:44 PM

You can mandate it on reboot with shutdown -rF now (or the amount of delay of your choosing).