the following error occurred when the virtual machine configured the epel source: 
 Environment: redhat7 + vmw 12 player 
 Please help your teachers. Thank you. 
 [root@localhost yum.repos.d]-sharp 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]-sharp rpm-vih  http://dl.fedoraproject.org/p.
 get  http://dl.fedoraproject.org/p.
curl: (5) Could not resolve proxy: http; Unknown name or service 
 error: skip  http://dl.fedoraproject.org/p.-transfer failed 
 [root@localhost yum.repos.d]-sharp rpm-Uvh  http://mirrors.kernel.org/fed.
 gets  http://mirrors.kernel.org/fed.
curl: (5) Could not resolve proxy: http;) Unknown name or service 
 error: skip  http://mirrors.kernel.org/fed.-transfer failed 
 [root@localhost yum.repos.d]-sharp name-a 
 bash: name: could not find the command. 
 [root@localhost yum.repos.d ]-sharp uname-a 
 Linux localhost.localdomain 3.10.0-327.el7.x86_64-sharp1 SMP Thu Oct 29 17:29:29 EDT 2015 x 86 "64 GNU/Linux 
 [root@localhost yum.repos.d]-sharp cat / etc/redhat-release 
 Red Hat Enterprise Linux Server release 7.2 (Maipo) 
 [root@localhost yum.repos.d]-sharp rpm-ivh  http://dl.fedoraproject.org/p.
 gets  http://dl.fedoraproject.org/p.
curl: (5) Could not resolve proxy: http;) Unknown name or service 
 error: skip  http://dl.fedoraproject.org/p.-transfer failed 
 [root@localhost yum.repos.d]-sharp wget  http://dl.fedoraproject.org/p.
--2018-06-20 13 http://dl.fedoraproject.org/p.
 41 http://dl.fedoraproject.org/p.
 51 http://dl.fedoraproject.org/p.
--2018-06-20- http://dl.fedoraproject.org/p.
 is parsing the host http (http). Failure: unknown name or service. 
 wget: cannot resolve host address "http" 
I practice https://www.cnblogs.com/dadon. based on this article.
