SSH client

This package manages ssh connections to other hosts ("client" mode), using the Go standard ssh library. It provides a similar interface as the exec package, e.g., with Run, Output, Start functions to execute commands, and its Config is based on exec.Config.

The Client type is used to establish a connection to a host, which persists until closed.

Each command execution process creates its own ssh.Session object that manages the process of running the command, within the scope of a persistently open Client connection. This is much faster than opening a new connection for each command. A map of open sessions is maintained in case of a Start command that runs the command asynchronously.

A good reference for similar package: https://github.com/helloyi/go-sshclient

scp

The https://github.com/bramvdbogaerde/go-scp package is used to implement the scp protocol on top of our client.