LINUX error Solution: Unable to locate package libX11-dev

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• The following error message:

configure: error: Could not find cups! You might be able to fix this by running 'sudo apt-get install libcups2-dev'. 
configure exiting with result code 1

People have told you command, and more considerate. however……

• Update command execution error:

sudo apt-get install libX11-dev libxext-dev libxrender-dev libxtst-dev libxt-dev
[sudo] ccyh 的密码： 
正在读取软件包列表... 完成
正在分析软件包的依赖关系树       
正在读取状态信息... 完成       
E: 无法定位软件包 libX11-dev

• Solution:

The reason is simple, an error, you can use lowercase (others also are lowercase, with the exception of the uppercase typo):

sudo apt-get install libx11-dev