My MacOS X

You may never need this, but if you administer servers remotely via the built in Apple VNC, it is the best trick ever.

However, the VNC service occasionally crashes, and locks my session. It also refuses any more VNC logins. This is particularly frustrating when I am off site! Apple has analyzed this and has no explanation or fix.

Here solution howto fix it: If SSH access is enabled on the server, you can connect to the server via an SSH client  and run this command:

sudo /System/Library/CoreServices/RemoteManagement/ARDAgent.app/Contents/Resources/kickstart -restart -agent

You must log in with admin rights, and must enter the admin password again to run the command. It can take a minute to run. After it finishes you’ll able to login again via VNC.

You can play with remotely once you kickstart ARD
http://support.apple.com/kb/HT2370?viewlocale=en_US

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