activating screen sharing remotely There is a computer I don't have immediate access to that I cannot screenshare with it. I have an account on the computer and have screenshared before with it. 

I believe some setting has been changed to deactivate screensharing. 

Is there a way to activate screensharing through ssh?

My computer is OS 10.6.8. I'm not sure what the other one is but probably the same.
To enable remote management (including screensharing), issue the following command over ssh:  

Note: This command sets your vnc password to 'mypasswd' as set by the -vncpw flag in the command, you should change this.

sudo /System/Library/CoreServices/RemoteManagement/ARDAgent.app/Contents/Resources/kickstart -activate -configure -access -on -clientopts -setvnclegacy -vnclegacy yes -clientopts -setvncpw -vncpw mypasswd -restart -agent -privs -all




To disable the remote management, issue the following command over ssh:

sudo /System/Library/CoreServices/RemoteManagement/ARDAgent.app/Contents/Resources/kickstart -deactivate -configure -access -off