[ludespeedny]

yeah, I followed a lot of this: https://tvheadend.org/projects/tvheadend...Repository
first I installed curl using 'apt-get update' and then the command 'apt-get install curl python-software-properties' then ran "curl http://apt.tvheadend.org/repo.gpg.key | sudo apt-key add -' then run 'sudo apt-add-repository http://apt.tvheadend.org/unstable' then run your 'apt-get update' and 'apt-get install tvheadend'
you will want to stop tvheadend probably before running that. I had to use 'sudo stop tvheadend'
Also you will get a message about replacing your config file, do not do that.

Yeah, I am about on the same end as far as knowledge of linux goes.