<operating system> file system check. The Unix program that
checks a file system for internal consistency and bad blocks
etc. and can repair some faults.
fsck is often used after a crash when the file system has
been left in an inconsistent state, e.g. due to incomplete
flushing of buffers.
Used on Usenet newsgroup alt.sysadmin.recovery as
substitute for "fuck" and became more main-stream after the
Communications Decency Act.
