4.5 Unix-like filesystem

In the GNU/Linux and other Unix-like OS systems, the files are organized into directories. [ 30] All files and directories are arranged in one big tree, the file hierarchy, rooted at /.

These files and directories can be spread out over several devices. The mount(8) command serves to attach the file system found on some device to the big file tree. Conversely, the umount(8) command will detach it again.