10 Permission introduction

1. The type of file is: drwx-xr-x. 2 root root 22323 March: For example:
   
   (1) The first character has the following types:
   • : Indicates normal file
     d: Indicates directory
     l: Indicates soft link
     c: Indicates character device [keyboard, mouse]
     b: Block file, hard disk
     Usually largeIn some cases -,d

(2)rw-, rwx is a group: indicates the permissions possessed by the owner of the file
r: read permission
w: write permission
-: indicates no permission
x:
(3)r-x: indicates the permission of the group where the file is located
r–: indicates that the group where the file is located has only read permission
(4)r-x: indicates the permission of other groups of the file.

Note: You must have write permission to the directory where the file is located before deleting the file.