Adding Extra Repo CentOS

ELRepo

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To install ELRepo for RHEL-5, SL-5 or CentOS-5:

rpm -Uvh http://www.elrepo.org/elrepo-release-5-5.el5.elrepo.noarch.rpm

To make use of our mirror system, please also install yum-fastestmirror

To install ELRepo for RHEL-6, SL-6 or CentOS-6:

rpm -Uvh http://www.elrepo.org/elrepo-release-6-6.el6.elrepo.noarch.rpm

To make use of our mirror system, please also install yum-plugin-fastestmirror

Import the public key:

rpm --import https://www.elrepo.org/RPM-GPG-KEY-elrepo.org

source:http://elrepo.org/tiki/tiki-index.php

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Installing Squid 3 on CentOS 5.x

1. Get the PP repository.

wget -q -O- "http://devel.pramberger.at/getrepo?release=5" /etc/yum.repos.d/pramberger.repo

2. Install Squid

yum install

source:http://www.davychiu.com/blog/