Instalando NGREP en Centos 6.5

## RHEL/CentOS 6 32-Bit ##
# wget http://download.fedoraproject.org/pub/epel/6/i386/epel-release-6-8.noarch.rpm
# rpm -ivh epel-release-6-8.noarch.rpm

## RHEL/CentOS 6 64-Bit ##
# wget http://download.fedoraproject.org/pub/epel/6/x86_64/epel-release-6-8.noarch.rpm
# rpm -ivh epel-release-6-8.noarch.rpm

yum --enablerepo=epel install ngrep

http://kbtec.blogspot.com.au/2013/05/how-to-enable-epel-repository-for.html

https://www.centos.org/forums/viewtopic.php?f=14&t=44380