Replace Cpanel Theme
Have you ever wanted to change all users’ themes/skins from Tree to Xskin server wide without going through each user account one at a time? We have a quick tutorial on how to change all user  themes in Cpanel.

First off you will need to have root access to your server, login as root then do the following:

1) Change directories

cd /var/cpanel/users

2) A look in a users file, list contents of directory
ls for the directory contents then type

pico username (replacing username with an account name)
You should see something like this:

What we’re interested in changing is the RS value.

3) Changing the user theme
 The first is the theme you want to change from, the latter is the theme you want to change to. In this case we want to change Tree skin to x2 skin on all user themes as some of our resellers are using an older skin.

replace RS=tree RS=x2 -- * 

pico username

You should see the new Cpanel theme.