卸载libreoffices
sudo apt-get remove libreoffice-common
删除Amazon广告图标
sudo rm -f /usr/share/applications/com.canonical.launcher.amazon.desktop
sudo rm -f /usr/share/applications/ubuntu-amazon-default.desktop
删除多余的软件
sudo apt-get remove thunderbird totem rhythmbox empathy brasero simple-scan gnome-mahjongg aisleriot gnome-mines cheese transmission-common gnome-orca webbrowser-app gnome-sudoku landscape-client-ui-installtransmission-common
