Shell file permissions and script execution

I. Rights Management

1. View file properties

Ls-l

2. Permission Type

Ii. Linux Users and permissions

1. User Management

① Viewing users

ID User1

② adding users

Useradd user1

③ Deleting a user

Userdel-r user1

1. User Group

① New Group

Groupadd G1

② Deleting a group

Groupdel G1

③ adding users to a group

Gpasswd-a user1 G1

④ remove users from the group

Gpasswd-d user1 G1

3. Permission Assignment

Sudo

Iii. user-to-file relationship-permissions

1. chmod Rights Assignment

①chmod 755 File

②chmod a+x File

2. ACL authorization

①setfacl Setting file Permissions

Setfacl-m user:user1:rwx File

②getfacl Viewing file permissions

Getfacl file

③ Delete File permissions

Setfacl-x user:user1 File

④ Empty file permissions

Setfacl-b file

⑤ Creating and Deleting file permissions

You need to set ACL permissions on the directory

Setfacl-m USER:USER1:RW dir

⑥ How to set permissions on directories and subdirectories and files

Setfacl-m User:user1:rw-r dir

⑦ directory and how files inherit permissions from the parent directory

Setfacl-m D:user:user1:rw-r dir

Shell file permissions and script execution