命令行是王道2：UBUNTU11 安装打印机 ( using command line install the printer )
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http://www.garron.me/linux/firewalld-is-not-running-ubuntu-printer.html
昨天安装打印机时，ubuntu提示： (when I was trying to setup printer under ubuntu, it complains: )
Firewalld is not running: Network printer detection needs... "Error in Ubuntu"
解决办法是使用 命令行来搞定： ( You will have to find a workaround, and one possible one is to open a window terminal and run: )
$ system-config-printer
命令行就是给力啊！！！！ ( command line is the superpower )