How to enable the vim editor to display the row number permanently?

How to enable the vim editor to display the row number permanently?
There may be n accounts in linux, so there are two ways for vim to display the row number: to display the row number only for the current user and to display the row number for all users

I. only ask the current user to display the row number and enter the command: vim ~ /. Vimrc and: set nu save: ctrl + z (or: wq !) OK! 2. Let all users display the row number and enter the command vim/etc/vimrc at the end of the vimrc file: set nu save: ctrl + z (or: wq !) OK! In this way, no matter which user displays the row number under vim !!