What is a Kernel in Linux?

This is the first question which should come to your mind when you start reading and knowing Linux because without knowing what a kernel is you can not move ahead. Let me help you understand

How to create user without useradd command in Linux

Follow these steps to create a user without using useradd command in Red Hat Linux. Step 1 Add an entry of user details in /etc/passwd The field details are as shown below username:password:UID:GID:Comments:Home_Directory:Login Shell #