Description of Read, write and execute permissions for Linux plain files

Linux 普通文件的读、写、执行权限说明

1. Readable r: Indicates a permission to read and read the contents of a file
2. Writable W: Indicates the right to have new, modified file contents
1) If there is no r mate, then the vi edit file will prompt you cannot edit (but can force edit), Echo can redirect or append
2) Special Note: The permission to delete a file (modify file name, etc.) is controlled by the permissions of the parent directory, regardless of the permissions of the file itself
3. Executable x: Indicates permission to execute file
1) The file itself should be able to execute
2) The normal user also needs to have R permission to execute
3) root can be executed with the permission of X

Description of Read, write and execute permissions for Linux plain files