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--- uva_msc_radioastronomy_2013_vnc [2013/04/04 12:06] – leeuwen
+++ uva_msc_radioastronomy_2013_vnc [2013/04/16 15:54] (current) – [2. Start the VNC session at the LOFAR cluster] leeuwen
@@ Line 58: / Line 58: @@
 As this session will continue to "live" after you log out, you probably only have to do this once.
-At the prompt on portal type:
+First set up the "window manager" for your virtual machine:
+edit (with pico, vi, etc) the file
+''~/.vnc/xstartup''
+to be:
+  #!/bin/sh
+  icewm-session &
+Then, at the prompt on portal type:
 vncserver
 You can also run vncserver with color depth or window size options. For example:
 vncserver [ -geometry 2048x1024 ] [ -depth 8 ] [-pixelformat BGR233]
+The first time you run vncserver it will ask you to set up a vnc password. Just use the one that came with your account.
 Once you have typed vncserver, the system will reply (e.g.) "New 'X' desktop is portal:2". In this example the VNC session number is 2. Remember this number since you will need it later. In the instructions below, the VNC session number is designated as n. If n is smaller than 10, use 0n (e.g., 02).
@@ Line 110: / Line 121: @@
 To establish an SSH tunnel AND start a VNC viewer, open a terminal on your local computer and type:
-vncviewer -Shared -via YOURLOGIN@portal.lofar.eu localhost:n
+vncviewer -shared -via YOURLOGIN@portal.lofar.eu localhost:n
 Replace n with the desktop number from the previous step and YOURLOGIN with the name of your account.
-The -Shared option allows support staff to "snoop" on your session when assisting you.
+The -shared option allows support staff to "snoop" on your session when assisting you.
 If you are not using an SSH agent, you will be prompted for your lodsXX account password.
@@ Line 150: / Line 161: @@
 The VNC Viewer window to lofar will now appear.
+===== Troubleshooting ====
+If you get the error "no free display number on machine", use the lofar backup portal. In the above instructions, substitute portal.lofar.eu everywhere with 195.169.3.218 .