Enable and Disable a user to access this system remotely

How about disabling a specific user from accessing your system remotely? How about disabling the user root from remotely access for security reasons?

Doing that is so easy and done in a one-short-line command as follow:

#chuser rlogin=false root

Additionally , let me tell you how to enable the remote access to the root user:

#chuser rlogin=true root