Farm node access

Use screen

triton # screen 

Open safe shells

From within screen

triton # for node in galaxy1 galaxy2 ... ; do screen -t $node ssh $node ; done 

Launch test processes

From within screen

triton # for node in galaxy1 galaxy2 ... ; do screen -t $node-worker ssh $node /path/to/test-script ; done 

Switch to nodes

In screen, enter C-a "

Then select the desired shell from the list.