Error: Package: libselinux-python-2.2.2-6.el7.x86_64 (@anaconda) Requires: libselinux = 2

==========直接抛出问安装问题

===场景 安装nginx时相关的依赖包不配套问题 yum -y install gcc pcre-devel zlib zlib-devel openssl openssl-devel 

===系统centos7 安装nginx

====解决方案

1.安装yum-utils相关工具 yum -y install yum-utils

2.清理yum yum clean all

3.清理未完成事务 yum-complete-transaction，清理未完成事务

4.清理安装文件原有依赖

package-cleanup --cleandupes -y
package-cleanup --cleandupes with --removenewestdupes -y

清理完安装正常

==================环境和系统和场景不同仅供参考====================

5.安装 yum -y install gcc pcre-devel zlib zlib-devel openssl openssl-devel