====== parallel-ssh ======
Send commands to multiple hosts over SSH.
Create a file named ''ssh-hosts'' with the username, hostname, and ports:
steve@192.168.12.101:22
steve@192.168.12.102:22
steve@192.168.12.103:22
Execute a single command, no timeout, and print output on console:
parallel-ssh -i -t 0 -h ssh-hosts echo hello