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For example, (I'm using Debian Linux, gnome desktop) 
 
1. &nbsp;I navigate to System Tools -&gt; Users and Groups and open the &quot;users and groups&quot; GUI. 
 
2. &nbsp;I Click the &quot;Users&quot; tab. 
 
3. &nbsp;I see all of the users I had created, 
&nbsp; &nbsp; &nbsp; John2 
&nbsp; &nbsp; &nbsp; John3 
&nbsp; &nbsp; &nbsp; John4 
 
4. &nbsp;I then see a checkbox that says &quot;Show all users and groups&quot;. &nbsp;I check it. &nbsp;Users appear that I didn't create such as: 
&nbsp; &nbsp; &nbsp;root 
&nbsp; &nbsp; &nbsp;daemon 
&nbsp; &nbsp; &nbsp;bin 
&nbsp; &nbsp; &nbsp;sys 
&nbsp; &nbsp; &nbsp;sync 
&nbsp; &nbsp; &nbsp;games 
&nbsp; &nbsp; &nbsp;man 
&nbsp; &nbsp; &nbsp;lp 
&nbsp; &nbsp; &nbsp;mail 
&nbsp; &nbsp; &nbsp;news 
&nbsp; &nbsp; &nbsp;uucp 
&nbsp; &nbsp; &nbsp;proxy 
&nbsp; &nbsp; &nbsp;www-data 
&nbsp; &nbsp; &nbsp;backup 
&nbsp; &nbsp; &nbsp;list 
&nbsp; &nbsp; &nbsp;irc 
&nbsp; &nbsp; &nbsp;gnats 
&nbsp; &nbsp; &nbsp;nobody 
&nbsp; &nbsp; &nbsp;Debian-exim 
&nbsp; &nbsp; &nbsp;postgres 
&nbsp; &nbsp; &nbsp;messagebus 
&nbsp; &nbsp; &nbsp;hal 
&nbsp; &nbsp; &nbsp;sshd 
&nbsp; &nbsp; &nbsp;identd 
&nbsp; &nbsp; &nbsp;saned 
&nbsp; &nbsp; &nbsp;gdm 
&nbsp; &nbsp; &nbsp;mysql 
 
Are these users automatically created from the Debian installation? &nbsp;(For the installation type I chose multi-user, instead of workstation, or server option). &nbsp;I'd appreciated some wisdom here. :) 

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For example, (I'm using Debian Linux, gnome desktop)

1.  I navigate to System Tools -> Users and Groups and open the "users and groups" GUI.

2.  I Click the "Users" tab.

3.  I see all of the users I had created,
      John2
      John3
      John4

4.  I then see a checkbox that says "Show all users and groups".  I check it.  Users appear that I didn't create such as:
     root
     daemon
     bin
     sys
     sync
     games
     man
     lp
     mail
     news
     uucp
     proxy
     www-data
     backup
     list
     irc
     gnats
     nobody
     Debian-exim
     postgres
     messagebus
     hal
     sshd
     identd
     saned
     gdm
     mysql

Are these users automatically created from the Debian installation?  (For the installation type I chose multi-user, instead of workstation, or server option).  I'd appreciated some wisdom here. :)


Which users are automatically created from a Linux Install (I'm using Debian)?

Linux is a UNIX-like open source operating system with hundreds of distinct distributions, including: Fedora, openSUSE, Ubuntu, Debian, Slackware, Gentoo, CentOS, and Arch Linux. Linux is generally associated with web and database servers, but has become popular in many niche industries and applications.