CentOS下执行yum install时提示无法下载https的package包，异常信息提示如下

# yum install -y PHP-mcrypt.x86_64

Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
 * base: mirrors.btte.net
 * extras: mirrors.btte.net
 * updates: mirrors.btte.net
epel                                                     | 4.3 kB     00:00     
http://download.fedoraproject.org/pub/epel/6/x86_64/repodata/56549b7eb81579a5e8512a47955fe5a2ed2c665557b580caa9c2919c2ffd5583-primary.sqlite.bz2: [Errno 14] problem making ssl connection
Trying other mirror.@H_404_7@ 

 解决方法 
 
vim /etc/yum.repos.d/epel.repo
 
 
 
[epel]
name=Extra Packages for Enterprise Linux 6 - $basearch
baseurl=http://download.fedoraproject.org/pub/epel/6/$basearch
#mirrorlist=https://mirrors.fedoraproject.org/Metalink?repo=epel-6&arch=$basearc
h
failovermethod=priority
enabled=1
#enabled=0
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-EPEL-6 @H_404_7@将enabled=1先改为enabled=0 
 
然后命令行执行
 
yum install ca-certificates，安装成功后，将enabled重新改为1，再行
 
yum install -y XXXX可以正常安装了