Mac Terminal: computer name replaced with "virus"

Hi, I'm having an issue where, in my Mac terminal, the space where the computer name is shown is instead replaced with the word "virus".
virus:~<username>$
Additionally, my internet connection either works terribly or not at all, and this only seems to happen at night. I have no idea what's going on, but maybe somebody can shed some light on this?

The most plausible explanation is that someone with access to your computer is messing with you. There's a number of ways of changing the computer's name shown at the command prompt (at least one doesn't involve touching your computer at all):
1. If your computer is given a name by the DHCP server (your Internet gateway, or whatever you are using), an individual can modify the name that the DHCP service gives your computer and your computer will simply adopt that name when receives its IP address assignment. (Doesn't require access to your computer.)
2. If your computer didn't get assigned a host name by DHCP, then the system will do a reverse DNS lookup on the IP address it gets. If the DNS server (or /etc/hosts) returns 'virus' as the host name for that IP address, then your system will use that name. (Doesn't require access to your computer.)
3. If neither of the first two things happened, the system will use the name you set in the Sharing pane of System Preferences. (Someone can set this by simply walking up to your computer and setting it, or by logging in with an admin account and editing /Library/Preference/SystemConfiguration/preferences.plist).
4. Someone could also edit the default prompt used by bash. The environment variable PS1 contains the prompt template string, the default being PS1='\h:\W \u\$ ' -- the '\h' means host name. You can do
'echo $PS1' to see if it's set this way. PS1 can be set in /etc/profile, /etc/bashrc, ~/.profile, and ~/.bashrc
There's a couple of other possibilities if you are integrating with Active Directory or Open Directory

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You can have a look at two of my blog post. The first one will show you how to enable Powershell support in your boot images:
http://www.mimercon.dk/da/easyblog/entry/adding-powershell-support-in-configuration-manager-2012-r2-boot-images
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Cedric de Saint-Rome wrote:
hi society,
a few days ago, my USB stick containing my 500+ songs (5gb, 1.7 days worth) broke. i realized i had put all my music on iTunes just a day before it broke. i bought a new USB stick to replace my last one. though when i tried putting the music on my new USB,
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To "fix" I:
First, I turned off networking which was WiFi in my circumstance.
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Mac Terminal: computer name replaced with "virus"

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