Return output over message

Hello! So im making a remote controller for ExtremeReactors.

local function update()
	while true do
		local event, senderId, msg, protocol = os.pullEvent("rednet_receive")
		shell.run(msg)
		rednet.broadcast()
	end
end

parallel.waitForAny(update, function() shell.run("shell") end)

This is my script so far.
Now i want it to broadcast the output of the command i sent the computer. How do i do so? I've been looking but i cant figure it out.
Thanks!

If you want to run a script "in the background" alongside shell, it's generally easier to just type "bg yourScript" straight into the commandline.

Sending the terminal output of a script to another system over rednet is a little more complex. A good start would be to read through this recent thread.

Okay thanks!