There are actually two repositories you could choose from. Stable and Testing. As you can infer from their titles, Stable repository will update you with stable releases of Picasa(Picasa 2.7 currently) while the later will get you releases that are meant for testing purposes, like the latest Picasa 3.0 beta for Linux.
Add Keyring First
- Before adding any repository you have to add the following keyring to authenticate.
- To do that, simply copy-paste the following in Terminal.
wget -q -O - https://dl-ssl.google.com/linux/linux_signing_key.pub | apt-key add - apt-get update
Open Sources.list file to add the Repository
- Open sources.list using gedit.(You can use other editors like vim or vi if you like)
sudo gedit /etc/apt/sources.list
- Now, depending on your needs, choose the Repository, and copy-paste the one you want into the sources.list file you just opened using gedit.
- Stable repository for Picasa, If you want to install the latest Picasa stable release.
deb http://dl.google.com/linux/deb/ stable non-free
- Testing Repository for Picasa, if you want the latest Picasa 3.0 beta in Ubuntu.
deb http://dl.google.com/linux/deb/ testing non-free
- Close sources.list and save the changes.
Now, Install Picasa in Ubuntu
- Go ahead and install Picasa in Ubuntu. Copy paste the following lines in Terminal.
sudo apt-get update sudo apt-get install picasa
- Done. Goto Applications > Graphics > Picasa. Enjoy!