Create user in linux with root privileges linux,unix.!

adduser -u 0 -o -g 0 -G 0,1,2,3,4,6,10 -M root2

adduser  : Command to create a user in linux
-u           : Set the value of user id to 0 which is generally root user id.
-o            : Set the value of user id to 0 which is generally root user id.
-g           :  Set the initial group number to to 0 generally root user group
-G           : Supplementary groups 0=root, 1=bin, 2= daemon, 3 = sys, 4=adm, 6=disk, 10 = wheel
-M          :  User home directory will not be created




There are so many other ways too .. !!