The following steps will quickly guide you to setting up proxy configurations ( with/without username, password authentication) to be used along with yum repositories . It has been tested on fedora 15, but will work fine for other versions of fedora as well.
[Note: If no username or password authentication is required you can omit the corresponding lines i.e proxy_username and proxy_password in step 1.]
step1: configure yum.conf (you need to be root in order to do it)
Enter the following lines at the bottom of [main] section:
step2: export http_proxy in bash login script ( you need to be root to do it)
Now , add the following line at the bottom:
By Mr. Sumit Kumar
Computer Science student at IIT Kanpur (INDIA).