As you well know, in Ubuntu 12.04 Dodge functionality has been removed from Unity, and then you can not hide the launcher when you maximize a window. Although highly recommended, this function can be re-introduced in Unity through the installation of a tweak.
Open Terminal and Enter the following commands:
Open Terminal and Enter the following commands:
sudo apt-get install compizconfig-settings-manager
sudo add-apt-repository ppa:ikarosdev/unity-revamped
sudo apt-get update
sudo apt-get dist-upgrade
Enjoy
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