-: regular files. That f.
d: directory directory file. Complete path mapping
b: block device: file support block device in units of blocks for random access
main equipment minor numbers
brw-rw ---- 1 root disk 7 , 0 Feb 1 10:00 loop0
major number, for identifies the device type, and to determine the driver to be loaded
minor number, used to indicate the same type of different devices
c: character device, characters in character device file access performed in units of linear
l: symbolic link symbolic link file corresponding to the windows soft connection shortcut file
p: pipe: named pipe
s: socket socket socket file to achieve communication between two processes
