pssh

> Parallel SSH program.

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

pssh -i -H "{host1} {host2}" {hostname -i}

Run a command and save the output to separate files:

pssh -H {host1} -H {host2} -o {path/to/output_dir} {hostname -i}

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

pssh -i -h {path/to/hosts_file} {hostname -i}

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

pssh -i -h {path/to/hosts_file} -A -l {root_username} {hostname -i}

Run a command with extra SSH arguments:

pssh -i -h {path/to/hosts_file} -x "{-O VisualHostKey=yes}" {hostname -i}

Run a command limiting the number of parallel connections to 10:

pssh -i -h {path/to/hosts_file} -p {10} '{cd dir; ./script.sh; exit}'

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