pussh: A simple SSH-based deployment tool written in Bash

Pussh is a parallel SSH tool for executing commands across multiple servers simultaneously. It fetches host lists from files or stdin and pipes outputs to specific commands. Users must ensure command compatibility with target environments. Speed depends on network latency and SSH connection rates. Bearstech has used Pussh internally since 2008 on a 500+ server cluster, typically reaching all targets in about 10 seconds.