[sf-lug] keep alive time for an ssh connection

[Rick Moen]

Quoting Rick Moen (rick at linuxmafia.com):

> Quoting Alex Kleider (a_kleider at yahoo.com):
> 
> > I tried 
> > ssh -o TCPKeepAlive <machine>
> > but it made no difference!
> 
> Hmm, you got the syntax wrong.  There's a missing "=yes", there.

No equals sign, actually.  "TCPKeepAlive yes".

However, it's actually "ServerAliveInterval 5" (or such) that you
actually need.  Flipping on the "TCPKeepAlive" boolean just enables the
_capability_, but the default frequency of keepalive messages, if you
do nothing about "ServerAliveInterval", is "never".