The ‘only’ user on Ubuntu LAMP is
root user which you access by default.
They other users, which are here to support running services, but you can’t login to them or use them beside service for which they are made.
One example of this user is
www-data which is here for web servers.
To list all users, you can use command:
It shows user and shell for user (what they see once they log in).
You can create your own user and you’re recommended to create a new non-root user for managing server. Steps for doing so are covered in Initial Server Set Up - Ubuntu 14.04.
When you start a new server, there are a few steps that you should take every time to add some basic security and set a solid foundation. In this guide, we'll walk you through the basic steps necessary to hit the ground running with Ubuntu 14.04.