Cannot run another ssh command inside ssh session

[tannn92]

I have 2 systems I work with that are daisy chained. System A is what I have to connect to initially, then I ssh into system B to run commands to view status of services and other things.

What I want to do is have a ruby script that can get into system B to run some commands and then pass the output from those commands back into my laptop automatically.

I can use ruby gem net/ssh to get into system A and run commands but I cannot figure out how to ssh into system B after I am in system A. This is what I have right now.

Net::SSH.start('123.456.78.9', 'username', password: 'password') do |ssh|
    # some how ssh into system b
end

I tried just ssh.exec! "ssh 123.456.78.30" but that does not work. I tried nesting another Net::SSH.start call but that doesn't work either.

Please help.