If you ever get messages like
Xlib:  connection to "jasper:0.0" refused by server
Xlib:  Client is not authorized to connect to Server
1363-008 aixterm: Cannot make a connection to X server jasper:0.
        If the X server is not running, run the xinit command.
        If the X server is running, check the specified display number.

this indicates you've rlog'd into some other machine and your x-server
doesn't think the machine your using is authorized to display stuff on
your console.  To see who is authorized, type xhost back home.
To add the machine, xhost ech for example.

  Another thing to beware of is that machines with multiple network
adapters have multiple names, for example spruce & spruce-70.
You'll need to xhost-authorize both.

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