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Filesystem Hierarchy Standard (FHS)
/root: root directory./home: user home directory./etc: contains all of the system-wide configuration files./bin: contains binaries (programs)./lib: contains shared library files used by the core system programs./sbin: contains “system” binaries./usr: contains all the programs and support files used by regular users./boot: contains the Linux kernel, initial RAM disk image (for drivers needed at boot time),
and the boot loader./dev: contains device nodes./var: variable files, such as logs./var/log: contains log files./tmp: temporary files, emptied each time when the system is rebooted./var/tmp: same with /tmp./media: mount points./mnt: use /media instead./run: runtime data, such as pid files./var/run: use /run instead (FHS 3.0)./proc: contains process and kernel information. procfs mounted.
