Linux file permissions and directory configuration

Directory of Linux System account information:

Account information:/etc/passwd

Personal Password:/etc/shadow

All group name:/etc/group

D: Catalogue

-: Archive

L: Connection File

B: can be random storage device

C: Disposable reading Device (mouse, keyboard)

rwx:r=4 (readable) w=2 (writable) x=1 (executable)

[-] [RWX] [R-x] [r--] meaning?

1 234 567 890

1: For archives

234: Owner permissions. Readable writable Executable

567: Same group User rights. Readable executable

890: Other user rights. Readable

[Email protected] ~]# ls-l/etc/shadow

-R--------1 root root 1124 10-21 15:57/etc/shadow

/etc/shadow only Root can read

CHGRP: Change the group that the file belongs to

-R: Recursive change, all files in the same directory

Chown: Changing the file owner

chmod: Change file permissions: Suid,sgid. Sbit and other characteristics

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Linux file permissions and directory configuration