feiyu07的博客

用终端安装新的包的时候，有时候会出现错误：XXX:~$ sudo apt-get install sysvbanner[sudo] password for XXX: E: Could not get lock /var/lib/dpkg/lock - open (11: Resource temporarily unavailable)E: Unable to lock the

wkhtmltopdf needs a X server. If you're running your application on a VPS, you probably don't have one installed. The solution is install a "virtual" X server.using wkhtmltopdf without X server