[D:\workspace]$ vagrant ssh
`ssh` executable not found in any directories in the %PATH% variable. Is an
SSH client installed? Try installing Cygwin, MinGW or Git, all of which
contain an SSH client. Or use your favorite SSH client with the following
authentication information shown below:
Host: 127.0.0.1
Port: 2222
Username: vagrant
Private key: D:/workspace/.vagrant/machines/default/virtualbox/private_key
使用xshell 登录即可
原文：http://my.oschina.net/lxrm/blog/528328