Linux commands (eight) Rights Management chown, CHGRP, chmod, umask

Rights Management:
R:
W:
X:

Three types of users:
U: Owner
G: Genus Group
O: Other users

Chown: Change file owner (only administrators can use this command)

-R: Modify the owner of the directory and its internal files

--reference=/path/to/somefile file,... Refer to a file, set the relevant file permissions for the reference file permissions, while changing to the main, belong to the group Chown Username:group file

Chgrp

chmod: Modify permissions for a file

Modify permissions for three categories of users:

-R
--reference=/path/to/somefile file,...

To modify a class of users or some class user rights:

U,g,o,a

chmod u=rwx,g=,o= File

Modify some or some bit permissions for a class of users:

chmod u+x,g-x File

Create a user by changing the file

Nano/etc/group

nano/etc/passwd

Nano/etc/shadow

Cp-r/etc/skel//home/hive/

Chown-r hive:hive/home/hive

Umask: Masking Code

666-umask
777-umask

The file cannot have Execute permission by default, and if the result has Execute permission, it will add 1 to its permission;

umask:023
Files: 666-023=643 + 1
Catalog: 777-023=754

Linux commands (eight) Rights Management chown, CHGRP, chmod, umask