After creating the user we need to provide him sudo privilege same as root.
Create a file in “/etc/sudoers.d” as “/etc/sudoers.d/arunlal”
vi /etc/sudoers.d/arunlal
=========================
arunlal ALL=(ALL) NOPASSWD:ALL
==========================
Add the above entry into the file and You are able to switch to root without en-trying the password.