deb http://backports.debian.org/debian-backports squeeze-backports main contrib non-free
However it seems that the squeeze (6.0) backports are gone from the Debian repositories, only jessie and up available there.
Moreover the specific URL http://backports.debian.org/debian-backports no longer exists.
What would be the best way for me to approach this upgrade?
Hi Nicholas,
....Squeeze has been EOL almost a year.
That being said, we don't take any steps to actively cause Salt to not
work on EOL operating systems like Debian Squeeze. If you can get
Salt's dependencies installed you might be able to install Salt from source.
Also, I wonder if salt-ssh would work for your use case.