由于CentOS6的系统安装了epel-release-latest-7.noarch.rpm导致在使用yum命令时出现Error:xzcompressionnotavailable问题。
解决方法：
1.到 http://ftp.riken.jp/Linux/fedora/epel/下载epel-release-latest-6.noarch.rpm
2.卸载epel-release-latest-7.noarch.rpm：yumremoveepel-release
3.清空epel目录：rm-rf /var/cache/yum/x86_64/6/epel/ 4.安装epel6:rpm-ivhepel-release-latest-6.noarch.rpm
原文链接：https://www.f2er.com/centos/381035.html解决方法：
1.到 http://ftp.riken.jp/Linux/fedora/epel/下载epel-release-latest-6.noarch.rpm
2.卸载epel-release-latest-7.noarch.rpm：yumremoveepel-release
3.清空epel目录：rm-rf /var/cache/yum/x86_64/6/epel/ 4.安装epel6:rpm-ivhepel-release-latest-6.noarch.rpm
