问题一：

[Error] Failed to install gzip

[Error] Failed to install openssl

[Error] Failed to install python

[Error] Failed to install pcre

[Error] Failed to install make

[Error] Failed to install curl

[Error] Failed to install cpio

yum install curl后出现了新的问题

Transaction check error:

  package curl-7.29.0-54.el7.x86_64 is already installed

Error Summary

-------------

卸载旧的安装包后就可以安装了

yum remove curl-7.29.0-54.el7.x86_64

yum install curl

（此问题出现于changeip的centos7系统模板）

问题二：

[Error]Download libsodium-1.0.17.tar.gz failed

yum install epel-release -y && yum install libsodium -y

（此问题出现于使用网易云centos7镜像的vmware虚拟机中）