1、首先报错
cups client error document format not supported
谷歌了尝试了一大堆解决方法没有用。
尝试从local:6300配置也无果。
大部分回答建议修改 .conf文件。
或者reinstall cups or restart cups.
后来看到https://bbs.archlinux.org/viewtopic.php?id=108145建议说
I also had to install foomatic-filters & ghostscript too ....
The printer is perfect now.
I am going to be writing a noobies how to for Arch & Openbox soon ......
于是安装这两个包：
sudo apt-get install foomatic-filters
sudo apt-get install ghostscript
得，连添加打印机都添加不了，又出现新错误：
'server-error-internal-error'
连http://localhost:631都打不开了
猜测新安装的包损坏了原有的CUPS。
重新安装CUPS，成功！！
2、总结：
sudo apt-get install foomatic-filters
sudo apt-get install ghostscript
sudo apt-get install cups --reinstall
sudo service cups restart
sudo /etc/init.d/cups restart
3、Reference
https://askubuntu.com/questions/994094/i-get-a-cups-server-error-server-error-internal-error-when-i-try-to-connect-a
https://answers.launchpad.net/ubuntu/+source/cups/+question/64845
https://bbs.archlinux.org/viewtopic.php?id=108145
https://askubuntu.com/questions/898786/cant-install-printer-cups-problem
