"Oh god! My filesystem gone mad... Hey linux can U do any FSCK?"

Hey its just FSCK! that is File System Check.

Only unix could give an FSCK. It is used to repair unix filesystems. A bit more intelligent than chkdisk in windows. Advantage is it will run on multiple physical drives in parallel to reduce time consumption. It runs automatically at the boot time. But in some cases a super user may have to manually run it. It will automatically fix the errors on your filesystem or let the user know what & where the problem is. You have lots of options to run fsck. Check FSCK manpage for the detailed description on its features/options to run it.We can run it to check the whole filesystem in different partitions or you can even mention the partition. fsck --help output is here in the image.