The Shell plug-in includes steps that run commands on the
target system.
Note: The steps in this plug-in wait
until the command is complete. Therefore, run commands that complete
or run in the background. If you run commands that continue indefinitely,
the step and the process that contains the step wait indefinitely.
Also,
the commands for each step share the same stdout and stdin streams.
If you run a command or script that runs other commands, each of those
commands use the same stdout and stdin stream as the first command
or script. The step waits for all of these commands to complete.