Massh makes it possible to run remote commands, push/execute scripts, and push/pull files on hundreds or even thousands of hosts in parallel. Massh uses Ambit or a similar host list generator to enumerate a list of targets for which it will execute one of the aforementioned operations. Hosts can be logically grouped and dynamically managed, allowing for consistent operational state and improved overall manageability.Changes: The program was completely rewritten. Ambit and Massh are divorced. A new, simplified CLI means that commands are shorter, memorable, devoid of a dashed option minefield, and grammatically self evident. File pull functionality was added and push functionality was improved. Script push and run has been drastically streamlined. New configurable options were added, commands were abbreviated, and performance gains were made from connection persistence and a streamlined flight_loop. A separator option was added for multi-line output. Default behavior is now configurable for even shorter commands. A man page was added.