Linux file types and permissions

File types for Linux

• Normal file
• Directory Files/Folders directory
• Equipment file Device

1. Block Device File Block
2. Character Device file code

• Piping file Pipe
• Connection File Link

In a Linux system, each user has read, write, and execute permissions on the file or directory.

different users have different access rights .

User type

1. User owner/Master of the file
2. The group owner of the file
3. Other users of the system

ls-l command, displaying details of files and directories

Second line :-rw-r--r-- to the last line of drwxr-xr-x representing file types and file permissions

Total 10 bits, first bit : attribute symbol. Represents a file type

　　　　　post 9-bit : Represents file permissions. The last 9 bits, each 3 for a group , represent different permissions for the above three types of users .

R:read read; w:write write; X:excute execute;-: no permissions.

Writable and readable

Permissions Modification:

chmod command (digital setting method)

(That is, every 3 bits, has a permission of 1, no permission is 0, with a binary representation, every 3 bits into decimal)

　

chmod Digital Permission file name

chmod 777 One.txt

Picture Permission modification:

1: log in as root user

2: Go to the folder to find the picture

3: Right-click, properties, permissions, modify, OK

Above.

Linux file types and permissions