1. # pluma /etc/apt/sources.list

  2. Replace all maya with rosa.

  3. Replace all precise with trusty.

  4. Run the following.
    # apt-get update

  5. Run the following.
    # apt-get upgrade

  6. Run the following.
    # apt-get dist-upgrade

  7. Run the following.
    # apt-get auto-remove

  8. Reboot.

  9. Pray that it works.

  10. Enjoy the new release.

  11. Subsequent upgrades should work with the below.
    # do-release-upgrade