Ah, but prepending with the hostname is crucial! Without it things
become extremely confusing when a command has problems on some hosts
but not on others. This is common in an almost-homogeneous cluster,
which is I dare say the typical situation.
Anyway, you might want to consider using a syntax like
dsh -a -c -r ssh -o '-l root -A -x' -- command-to-execute
because glomming together multiple -o args is hard to read.
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