Chmod command, chmod

Chmod command, chmod

Chmod -- Modify file or directory permissions

ChAnge the permissionsModE of a file

Command path:/bin/chmod

Note: Only root users and file owners can modify permissions.

 

Example 1:

# Chmod644/temp/chmodtest

R (read) -- 4

W (write) -- 2

X (execute) -- 1

Execute the above command to modify the chmodtest File Permission In the/temp/directory to-rw-r --

Example 2:

# Chmod-R 777/temp/

The role of the parameter R is to implement recursive modification permissions. Execute the above command to modify the permissions of the/temp/a directory under the current working directory and all its subdirectories and files to-rwxrwxrwx

 

Raise questions:If the root user creates a directory with 777 permissions and a file with 644 permissions in the directory, can a common user delete files in the directory?

Problem Analysis:

Normal users can delete a file directory because the file directory permission is 777, that is, other users have the write permission on the directory.

Character	Permission	Meaning of a file	Meaning of directory
R	Read Permission	You can view the File Content	List contents in the directory
W	Write Permission	File content can be modified	You can create or delete files in the directory.
X	Execution permission	Executable files	You can enter the Directory