I followed this post on OMG Ubuntu!, about how to install Google Play to sync your music. I have tried to install it but it shows me this message:
The installation of a package which violates the quality standards ins't allowed. This could cause serious problems on your computer. Please contact the person or organisation who provided this package file and include the details beneath.
Lintian check results for /home/user/Downloads/google-musicmanager-beta_current_amd64.deb: E: google-musicmanager-beta: file-in-etc-not-marked-as-conffile etc/cron.daily/google-musicmanager