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yum报错：line 30 execpt KeyboardInterrupt,e:Syntax Error:invalid systax
解决方案：https://blog.csdn.net/xjmxym/article/details/73610648
将centos默认Python2升为Python3后出现的错误，只要在/etc/bin/yum的第一行指定以Python2执行就可以了
CentOS安装Python3
解决方法：https://www.linuxidc.com/Linux/2016-04/129784.htm
yum提示another app is currently holding the yum lock;waiting for it to exit:
解决方法：https://blog.csdn.net/lyc_daniel/article/details/11064881
Centos6.8 安装mysql5.7遇到的问题
https://blog.csdn.net/wangzi419/article/details/80865192
https://blog.csdn.net/wyl9527/article/details/78256066
https://www.jianshu.com/p/7b8c4dea6829
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