虚拟机配置epel源时出现下面错误：
环境：redhat7 + vmw 12 player
麻烦各位老师提供帮助。谢谢。

[root@localhost yum.repos.d]# ping www.baidu.com
PING www.a.shifen.com (61.135.169.121) 56(84) bytes of data.
^C
--- www.a.shifen.com ping statistics ---
310 packets transmitted, 0 received, 100% packet loss, time 309233ms

[root@localhost yum.repos.d]# rpm -vih http://dl.fedoraproject.org/p...
获取http://dl.fedoraproject.org/p...
curl: (5) Could not resolve proxy: http; 未知的名称或服务
错误：跳过 http://dl.fedoraproject.org/p... - 传输失败
[root@localhost yum.repos.d]# rpm -Uvh http://mirrors.kernel.org/fed...
获取http://mirrors.kernel.org/fed...
curl: (5) Could not resolve proxy: http; 未知的名称或服务
错误：跳过 http://mirrors.kernel.org/fed... - 传输失败
[root@localhost yum.repos.d]# name -a
bash: name: 未找到命令...
[root@localhost yum.repos.d]# uname -a
Linux localhost.localdomain 3.10.0-327.el7.x86_64 #1 SMP Thu Oct 29 17:29:29 EDT 2015 x86_64 x86_64 x86_64 GNU/Linux
[root@localhost yum.repos.d]# cat /etc/redhat-release
Red Hat Enterprise Linux Server release 7.2 (Maipo)
[root@localhost yum.repos.d]# rpm -ivh http://dl.fedoraproject.org/p...
获取http://dl.fedoraproject.org/p...
curl: (5) Could not resolve proxy: http; 未知的名称或服务
错误：跳过 http://dl.fedoraproject.org/p... - 传输失败
[root@localhost yum.repos.d]# wget http://dl.fedoraproject.org/p...
--2018-06-20 13:41:58-- http://dl.fedoraproject.org/p...
正在解析主机 http (http)... 失败：未知的名称或服务。
wget: 无法解析主机地址 “http”

我是根据这篇文章实践的https://www.cnblogs.com/dadon...。