There are three types of user accounts in Linux- one is Root user account and the others are a Regular user account, and a Service account. The root user account is the main super admin account on Linux created automatically during the installation of the OS. It has access to the whole system, services, and files. In short, we can do any administrative work using it. Hence, if required can be disabled but we cannot delete it. A regular user account is created automatically or we can create one manually with moderate privileges. This type of account cannot execute Admin tasks until sudo rights are not provided. Service accounts are created by installation packages.