== For Linux users ==
You will have to install as root a VNC server on a different port thandefaultas root.
Armen's WIP.
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NOTE: These instructions have worked for a 10.8 Mountain Lion machine and connecting from Ubuntu 13.10.
* Install it (the installation takes a bit of time)
installer -pkg VNC-5.1.0-MacOSX.pkg -target /
* Request a personal free 30-day license keyVisit [http://realvnc.com/purchase/activate http://realvnc.com/purchase/activate]* Apply the license /Library/VNC/vnclicense -add <license key>* Start things up (based on [http://technosense.blogspot.ca/2009/03/start-vnc-from-command-line-and-connect.html this] article):<pre>sudo /System/Library/CoreServices/RemoteManagement/ARDAgent.app/Contents/Resources/kickstart -configure -allowAccessFor -allUsers -privs -allsudo /System/Library/CoreServices/RemoteManagement/ARDAgent.app/Contents/Resources/kickstart -configure -clientopts -setvnclegacy -vnclegacy yessudo /System/Library/CoreServices/RemoteManagement/ARDAgent.app/Contents/Resources/kickstart -configure -clientopts -setvncpw -vncpw supersecretsudo /System/Library/CoreServices/RemoteManagement/ARDAgent.app/Contents/Resources/kickstart -restart -agent -console</strikepre>* Use Remmina Remote Desktop Client
= Mac OS X 10.6 - Snow Leopard =