隐藏：
1、sudo apt-get autoremove appmenu-gtk appmenu-gtk3 appmenu-qt
2、reboot
恢复：
1、sudo apt-get install appmenu-gtk appmenu-gtk3 appmenu-qt
2、reboot
Hide the common top menu in Ubuntu 12.04,布布扣,bubuko.com
Hide the common top menu in Ubuntu 12.04
原文：http://www.cnblogs.com/wiessharling/p/3569616.html