From: Dan Nachbar <dan@...>
Date: 2011-08-27T02:03:12+09:00
Subject: Re: ssh login to a host


On Aug 26, 2011, at 11:59 AM, Rick Tan wrote:

> Hi,
> 
> Can someone give me some advice on how to reliably check that a server
> is alive and accepts ssh login?  Have tried ping but that opens a small
> window that ssh login is still not available.

With 1.9.2 you can say -

require 'socket'
s = TCPSocket.open('myfavoritehost.com', 22)

s.gets(3).eql? "SSH"

Dan Nachbar