Parallel execution of a command on few boxes over ssh (using bash)

Question

What would be the cleanest way to execute same command remotely on several boxes with joint output to console?

For instance, I would like to tail logs from several boxes all together in my console as one output.

If you're asking how to do this from an interactive command line, that's a better fit for Unix & Linux than here. StackOverflow's scope is limited to software development. — Charles Duffy
– Charles Duffy, Commented Feb 19, 2018 at 16:16

liborm · Accepted Answer · 2018-02-19 15:46:38Z

3

Definitely GNU parallel is a nice tool for parallelizing things in the shell. It also has reasonable remote execution capabilities.

It can be as easy as

parallel -S $SERVER1 -S $SERVER2 echo ::: running on more hosts

answered Feb 19, 2018 at 15:46

liborm

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2 Comments

Running parallel --tag is useful here. Also, you can add servers using commas, -S $SERVER1,$SERVER2,$SERVER3

For tail -f you should also have a look at --line-buffer