Ubuntu设置默认Terminal为Terminator
1、首先，安装Terminator: sudo apt-get install terminator
2、其次，安装dconf-tools : sudo apt-get install dconf-tools
3、最后，使用这两个命令：
$ gsettings set org.gnome.desktop.default-applications.terminal exec /usr/bin/terminator
$ gsettings set org.gnome.desktop.default-applications.terminal exec-arg "-x"