/bin Basic commands required for system configuration.
/boot For startup.
/dev For device investigation.
/etc For system settings.
/home The user's home directory.
/lib Shared library for / bin, / sbin
/lost+found Lost & corrupted files
/misc Miscellaneous files.
/mnt Mount point for temporary partitions.
/proc Kernel check file.
/root Superuser home directory.
/sbin Administrative command.
/tmp temporary file. A principle that all users can use freely.
/usr Hierarchy for users.
/va Logs, spools, system definition files, etc.
/var Files that change a lot. Log files etc.