How to set vimrc file settings for sudo login?

Question

linux

I work with Centos 6.5_x86. Disabled login as root, enabled my user. Created ~/.vimrc file in both home directories

syntax on
set number

vim displays the color scheme and line numbering everywhere, but if I go through sudo, vim opens with empty settings.
I suspect that the sudo directory must be somewhere ..

Answer 1

what does sudo mean?
sudo -s - will pick up the user environment under which they were originally.
sudo -i - will apply the environment of the user to which you are elevating privileges. That is the environment of the root.
Choose whichever is more convenient for you.

Answer 2

/etc/vimrc
/root/.vimrc