Page Comparison

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1. Find the numerical value associated with your username (i.e. 3 for jhaase): 

   Code Block
   cat /etc/tigervnc/vncserver.users

   
   

2. Find the service associated with the numerical value (i.e. vncserver@:3.service for jhaase): 

   Code Block
   ls -l /etc/systemd/system/multi-user.target.wants

   
   

3. Check if the service is running: 

   Code Block

   $ systemctl status vncserver@:3.service ● vncserver@:3.service - Remote desktop service (VNC) Loaded: loaded (/usr/lib/systemd/system/vncserver@.service; enabled; vendor preset: disabled) Active: active (running) since Wed 2022-07-27 17:16:53 PDT; 31min ago Main PID: 2192 (vncsession) Tasks: 0 (limit: 3196277) Memory: 2.0M CGroup: /system.slice/system-vncserver.slice/vncserver@:3.service ‣ 2192 /usr/sbin/vncsession wcwong :3 Jul 27 17:16:51 moho systemd[1]: Starting Remote desktop service (VNC)... Jul 27 17:16:53 moho systemd[1]: Started Remote desktop service (VNC).

   Looking for "active (running)" in the Active line. 
   
   

4. If the service is not running: 

   Code Block
   $ systemctl start vncserver@:3.service ==== AUTHENTICATING FOR org.freedesktop.systemd1.manage-units ==== Authentication is required to start 'vncserver@:3.service'. Authenticating as: jhaase Password: ==== AUTHENTICATION COMPLETE ==== $

   Where the "Password:" is asking for your AD password for your user account.
   
   

5. If the service refuses to start, run this command in your SSH session into the server: 

   Code Block
   sudo systemctl restart gdm

   
   

Bug reference https://bugzilla.redhat.com/show_bug.cgi?id=667764

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1. On your local client machine, create the tunnel with the port number obtained above. SSH to the server with the following command.  The -C flag is optional for compression. Replace <username> with your username. Replace <servername> with name of the server. 

   Code Block
   ssh -C -L 5903:localhost:5903 <username>@<servername>.ucsd.edu

   
   

2. Once the ssh tunnel is established you can launch Screen Sharing via the Terminal or from the Finder 
   
   via Terminalfrom a NEW local terminal
   
   

   Code Block
   $ open vnc://localhost:5903

   or

   
   via Finder > Go > Connect to Server...
   
   
   
   enter vnc://localhost:5903
   
   
   
3. When prompted provide your VNC password.  NOTE this password should be treated as an insecure password and should not be re-used elsewhere.

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