What's the risk of upgrading over SSH?

Posted by C. Ross on Ask Ubuntu See other posts from Ask Ubuntu or by C. Ross
Published on 2010-10-22T15:16:17Z Indexed on 2012/10/02 9:50 UTC
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Filed under:

server

|

upgrade

|

ssh

When I run

sudo do-release-upgrade

over ssh, I get the following message.

This session appears to be running under ssh. It is not recommended
to perform a upgrade over ssh currently because in case of failure it
is harder to recover.

If you continue, an additional ssh daemon will be started at port
'9004'.
Do you want to continue?

What is the real risk of upgrading over ssh? How does the additional ssh daemon help mitigate this?

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