Linux FileSystem Hierarchy

/bin - binary
/dev - devices (virtual directory, devices add to the directory at boot)
/etc - configuration settings
/home - home directory
/lib - shared library
/mnt - mount directory
/proc - virtual directory (current state of the system)
/root - root home directory (security user)
/sbin - security bin (Require Secure Access)
/tmp - temporary directory
/usr - unix system resources
/var - variable data (logs, crons, spool, db files)