本文已参与「新人创作礼」活动，一起开启掘金创作之路。
一、问题
我们在linux服务器上，安装了opencv之后无法正常调用，报错如图所示：
二、解决方案
其实就是缺少依赖库，我们首先运行如下命令
apt-get update
可以会出现如下情况，就是网速正常的情况下依然0%
如果出现上述问题，证明我们需要换源，按照如下方法进行操作
找到 /etc/apt/sources.list 然后把里面的内容换成如下内容
deb http://mirrors.aliyun.com/ubuntu/ xenial main restricted
deb-src http://mirrors.aliyun.com/ubuntu/ xenial main restricted multiverse universe #Added by software-properties
deb http://mirrors.aliyun.com/ubuntu/ xenial-updates main restricted
deb-src http://mirrors.aliyun.com/ubuntu/ xenial-updates main restricted multiverse universe #Added by software-properties
deb http://mirrors.aliyun.com/ubuntu/ xenial universe
deb http://mirrors.aliyun.com/ubuntu/ xenial-updates universe
deb http://mirrors.aliyun.com/ubuntu/ xenial multiverse
deb http://mirrors.aliyun.com/ubuntu/ xenial-updates multiverse
deb http://mirrors.aliyun.com/ubuntu/ xenial-backports main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ xenial-backports main restricted universe multiverse #Added by software-properties
deb http://archive.canonical.com/ubuntu xenial partner
deb-src http://archive.canonical.com/ubuntu xenial partner
deb http://mirrors.aliyun.com/ubuntu/ xenial-security main restricted
deb-src http://mirrors.aliyun.com/ubuntu/ xenial-security main restricted multiverse universe #Added by software-properties
deb http://mirrors.aliyun.com/ubuntu/ xenial-security universe
deb http://mirrors.aliyun.com/ubuntu/ xenial-security multiverse
可能这些地址会变化，如果改成这些不管用了，可以在网上找最新的源
换完源之后，依次运行如下命令
apt-get update
apt-get install apt-file
apt-file update
然后寻找依赖库
apt-file search libGL.so.1
根据提示安装适合的依赖库
apt-get install xxx （xxx指提示的依赖库的名字）
参考博客 感谢以下博客的作者~
