Vim saves read-only files

Do you often encounter this situation like me: you have edited a system configuration file in Vim, and you only need to save it to find that the current user has no write permission for the file. If you have made a lot of changes, it is really annoying to give up saving. you have to first save the changes to the user's home directory, then use sudo music to move to the original location of the file, and select wn as needed. This is too troublesome. The following tips are too convenient. Enter the following command when saving:

1	: W ! Sudo Tee %