Had to perform the same job on a bunch of nodes. ClusterSSH[1] is what
people usually use to do this job. I didn't have it available, but
dvtm[2] was.
When run as "DVTM_TERM=xterm dvtm" (dvtm's terminfo was not installed
on those nodes), dvtm does a pretty good job at multiplexing input to
multiple nodes: Each keystroke is sent to each node simultaneously.
Plus, my knowledge of ed(1) came in handy (once more).
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1.
http://www.linux.com/learn/tutorials/413853:managing-multiple-linux-servers-with-clusterssh
2.
http://www.brain-dump.org/projects/dvtm/
