touch /etc/yum.repos.d/city-fan.repo
vi /etc/yum.repos.d/city-fan.repo
add the following:
[CityFan]
name=City Fan Repo
baseurl=http://www.city-fan.org/ftp/contrib/yum-repo/rhel$releasever/$basearch/
enabled=1
gpgcheck=
yum info curl
yum update curl