Linux Directory Hierarchy
/bin is for binaries. /dev is for device files. /etc is for system configuration. /home is for user files. /lib is for shareable libraries (object code). /proc is for system statistics. /sys is for system devices. /sbin is for binaries that the system needs to boot. /tmp is for temporary files that are cleaned up frequently. /usr holds a similar directory structure to the root. /var is for variable information, like system logging.