My current Raspberry Pi setup is a mostly up-to-date version of Raspbian, a slightly modified version of Debian Wheezy. Since Ubuntu is also directly based off of Debian, we can take advantage of this to be able to use our PPA. The Ubuntu version that is based off of Wheezy is 12.04 Precise Pangolin, and that happens to also be an LTS (long term support) release, which means that we'll be able to use this for five-ish more years.
The first step is to edit the
/etc/apt/sources.list file, which contains all of the locations of the package sources for the Raspberry Pi. We need to first see what the URL for the package list is, so we'll head on over to the PPA's web page. In this case, it's https://launchpad.net/~salience-team/+archive/salience-devel-ppa.
We need to get the source entries to put in
sources.list, so we'll head over to the PPA page and scroll down to where it says "Adding this PPA to your system". Click the dropdown menu that says "Technical details about this PPA" to get all of the information we need. It'll have the source entries and the GPG key. Then, select "Precise (12.04)" from the dropdown menu.
Now we need to copy the part that says:
deb http://ppa.launchpad.net/salience-team/salience-devel-ppa/ubuntu precise main deb-src http://ppa.launchpad.net/salience-team/salience-devel-ppa/ubuntu precise main
/etc/apt/sources.list (with the date in the filename):
sudo cp /etc/apt/sources.list /etc/apt/sources.list.bak-$(date +%m-%d-%Y)
... and paste the sources into the end of
sudo nano /etc/apt/sources.list
Add a new line, then do Control+Shift+V (in GNOME Terminal and LXTerminal) to paste it.
Now, my file looks like this:
deb http://mirrordirector.raspbian.org/raspbian/ wheezy main contrib non-free rpi # Salience development PPA deb http://ppa.launchpad.net/salience-team/salience-devel-ppa/ubuntu precise main deb-src http://ppa.launchpad.net/salience-team/salience-devel-ppa/ubuntu precise main
# Salience development PPA line doesn't do anything; it just tells us what these entries are for.
Now that we got that nasty part out of the way, it's pretty much a breeze from here. Now we need to import the PPA signing key. Back to the "Details" section of the PPA page, we need to copy the part under "Signing key" and copy that. So, that would be "1024R/80CDD9B7" for Salience.
Now, take everything after the slash (so 80CDD9B7 for Salience) and run it after replacing it with
$SIG in this command:
sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys $SIG
Now we just need to install Salience! :D
This part is pretty easy. First, update the package lists:
sudo apt-get update
and then install the theme itself:
sudo apt-get install salience-theme
... and we're done! You've got a self-updating PPA package on your Raspberry Pi! :)
Just make sure to run
sudo apt-get upgrade
to keep it up-to-date!