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The important thing to note in this command, is the "-n" flag.
There is 1 alternative - vote for the best!
dsh - Distributed shell, or dancer?s shell ;-)
you can put your servers into /etc/dsh/machines.list than you don't have to serperate them by commata or group them in different files and only run commands for this groups
dsh -M -c -a -- "apt-get update"
If you can do better, submit your command here.
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