On 03/06/2016 04:26, Lucas Castro wrote:
> I don't have any ideia how to use this
> 
>   * Usage of multiple connections from multiple hosts to guard against
>     loss of connection to remote host following configuration changes
> 
> can someone say anything about this ssh usage?


it's a niche case, there are many examples that all come under the
heading of "useful stuff to know".

Most common example might be changing the root password. To test, you
might log out the log back in only to realize you changed the passwd
with a typo. Now you are locked out.

Nifty sysadmin solution: have two root sessions open. If you make a
mistake, the second shell is still running as root so you can correct it.

You can even log in twice from different networks on say eth0 and eth1.
If a firewall change affecting port 22 via eth0 goes wrong, you still
have the session via eth1 to fix it.

I'm having a hard time thinking of a suitable exam question though. Any
scenario described in a question tends to answer itself.

-- 
Alan McKinnon
alan.mckin...@gmail.com

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