(ddd.info)Remote Host
2.4.1 Running DDD on a Remote Host
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You can run DDD on a remote host, using your current host as X display.
On the remote host, invoke DDD as
ddd -display DISPLAY
where DISPLAY is the name of the X server to connect to (for instance,
`HOSTNAME:0.0', where HOSTNAME is your host).
Instead of specifying `-display DISPLAY', you can also set the
`DISPLAY' environment variable to DISPLAY.