How to configure yum on a proxy network in Centos

Now we are going to enable yum update through proxy server on Linux Centos system. So Backup "yum.conf" configuration file before we start edit the yum.conf file.

          [root@sysadmin ~]#   cp  -p   /etc/yum.conf   /etc/yum.conf.bkp


Open the yum.conf configuration file and put the http proxy server address and proxy port number

          [root@sysadmin ~]#   vim   /etc/yum.conf

If the proxy server require a user name and password... edit the /etc/yum.conf and add proxy user username and add proxy user password

 Then execute "yum clean all" command to clean/clear yum cache file

Then execute "yum update" command

I hope, it should work.