Google Cloud: Why my instance has 3 users created by default?
<p>I have a virtual machine instance (Debian wheezy) running on Google Compute Engine. At the time of creation of the instance, by default there were 3 users (apart from <code>root</code>) in the <code>/home</code> directory. For example, if my email id (with which I login to Google cloud platform) is <code>ab@xyz.co</code> then the 3 users in the <code>/home</code> directory are <code>ab</code>, <code>abxyz</code> and <code>ab_xyz_co</code>.
I don't understand what's the point of creating 3 different users.</p>

<p>When I login, by default I am logged into the machine as the user <code>abxyz</code>. I also cannot assume that the other two users (<code>ab</code> and <code>ab_xyz_co</code>) just exist and are never used, because I can see some folders in the home directory of other 2 users whose size change whose time. Moreover, the sizes of these folders are different, i.e. same things are not being added to all the accounts.</p>

<p>What's going on? Any ideas?</p>