According to the WebUpd8 website:
Update: Jupiter has been discontinued. I suggest trying TLP instead.
To install it, open a terminal (press Ctrl+Alt+T) and run:
sudo -i
add-apt-repository ppa:linrunner/tlp
apt-get update
apt-get install tlp tlp-rdw
tlp start
Make sure to read what the WebUpd8 website has to say about TLP or what the TLP FAQ says.
If you absolutely must have Jupiter, it's available via the JoliCloud PPA repository.
Note that the following assumes:
- You're using Ubuntu 13.04 or later.
- You're OK with completely unsupported software.
- You realize the software is discontinued.
To install it, open a terminal and run:
sudo -i
add-apt-repository -y ppa:jolicloud-team/ppa
cd /etc/apt/sources.list.d
mv jolicloud-team-ubuntu-ppa-*.list jolicloud-team-ubuntu-ppa.list
sed -i "s/$(lsb_release -cs)/raring/g" jolicloud-team-ubuntu-ppa.list
cd -
apt-get update
apt-fast install jupiter
If you're installing to an Asus Eee PC, run the following as well:
sudo apt-get install jupiter-support-eee