check_hello_world_ssh

######### What it does #########
#checks ssh status running "echo hello world" on the remote machine
#I created this plugin to check if the target machine can handle ssh connections. Differently from check_ssh standard plugin, this script will open a connection and run a command. So we can detect machines which are up and running but in weired states, eg: ssh responds but does not load you the prompt

######### Usage ####
#Of course the plugin needs that *nagios user* has unattended ssh access to the target machine (nagios user has previously exchanged the SSH key with the target). To allow ssh connection with no password, just run
# su - nagios
# ssh-copy-id your_user@target