Different System Users on Slackware Linux server, why?

[tHeDa!]

I have seen in many servers which are running Slackware that there are different kinds of users listed. Even if it is a single server, there are different users are configured. Most servers obviously have root but along with this there are more users like Bin, Apache, Nobody, sshd, etc. do you know why these users are and what kind of purpose of that.

[Jailekhaa]

It is not only about the servers which is running Slackware but all other servers which are running different LinuX distros contain different kind of users with different name. There is a huge advantage behind that and only the admin who have root privileges know this thing. I may believe that it is a system account or simply an account which a program or daemon starts and runs. Instead of running directly, it will bind under the root to run the process. This is secure when someone exploits a bug in bind, he will not be able to get the root privileges.

[KennedII]

What he is telling is true and it is really useful in server environment. You might know that most servers are running Linux distros nowadays and this because of the security level and complicated kernel system inside it. These systems cannot be easily hackable. You will need a root access in order to take control of the entire system. So binding the root account behind the dummy account surely going to prevent attack and exploit.

[JyotiT]

These different system-level users/groups are used for the purpose of providing identity for processes which are running under the root account and also for providing the granularity of file ownerships plus permissions. Like this way it is also meant for providing ownerships for different processes.