The Filesystem Hierarchy Standard (FHS) is a collaborative document that defines the names and locations of many files and directories in a operating file system
The FHS document is the authoritative reference to any FHS-compliant file system, but the standard leaves many areas undefined or extensible. The complete standard is available at http://www.pathname.com/fhs
| Directory | Description |
|---|---|
| /dev/ | contain file system entries which represent devices that are attached to the system. |
| /etc/ | is reserved for configuration files that are local to the machine. No binaries are to be put in /etc/. Any binaries that were once located in /etc/ should be placed into /sbin/ or possibly /bin/ |
| /lib/ | should contain only shared libraries that are needed to execute the binaries in /bin/ and /sbin/. These shared library images are particularly important for booting the system and executing commands within the root file system. |
| /mnt/ | The /mnt/ directory is for temporarily mounted file systems, such as CD-ROMs and floppy disks. |
| /proc/ | presents information about processes and other system information |
| /usr | stands for universal system resources |
| … | more ….. |
More, see wiki/Unix_filesystem