Use google repositries

Google’s Linux software repositories make it easier to download and stay up-to-date with current releases of Google Linux applications. Please choose one of the guides below to help configure your system to use these repositories.

First you need to edit /etc/apt/sources.list file

$ sudo vi /etc/apt/sources.list

add the following line

# Google software repository

deb http://dl.google.com/linux/deb/ stable non-free

Save and exit the file

you must download the key and then use apt to install it and refresh your package indexes.

Run these commands as root:

$ wget -q -O – https://dl-ssl.google.com/linux/linux_signing_key.pub | apt-key add -

Now you need to update the source list using the following command

$ sudo apt-get update

Install google applications now you can see the following command to install google picasa

$ sudo apt-get install picasa