pssh — Parallel SSH program. More information: <https://manned.org/pssh>.

Run a command on two hosts, and print its output on each server inline

pssh {{[-i|--inline]}} {{[-H|--host]}} "{{host1}} {{host2}}" {{hostname --ip-addresses}}

Run a command and save the output to separate files

pssh {{[-H|--host]}} {{host1}} {{[-H|--host]}} {{host2}} {{[-o|--outdir]}} {{path/to/output_directory}} {{hostname --ip-addresses}}

Run a command on multiple hosts, specified in a new-line separated file

pssh {{[-i|--inline]}} {{[-h|--hosts]}} {{path/to/hosts_file}} {{hostname --ip-addresses}}

Run a command as root (this asks for the root password)

pssh {{[-i|--inline]}} {{[-h|--hosts]}} {{path/to/hosts_file}} {{[-A|--askpass]}} {{[-l|--user]}} {{root_username}} {{hostname --ip-addresses}}

Run a command with extra SSH arguments

pssh {{[-i|--inline]}} {{[-h|--hosts]}} {{path/to/hosts_file}} {{[-x|--extra-arg]}} "{{-O VisualHostKey=yes}}" {{hostname --ip-addresses}}