Sometime Today, Sameer Shinde assembled some asciibets to say:
How can I add new user in my RHL 7.1 box. I tried using
useradd <username> -p
<password>
Don't set the password using useradd. Instead, after you add the user, type passwd user and then enter the password for the user. This works.
Have you read the man page for useradd? If you have, then you will notice in the See Also section that there is a command called userdel.
Philip