0) need epel-release
# yum -y update epel-release
1) create a new file /etc/yum.repos.d/city-fan.repo
# vi /etc/yum.repos.d/city-fan.repo
2) Paste the following contents:
[CityFan]
name=City Fan Repo
baseurl=http://www.city-fan.org/ftp/contrib/yum-repo/rhel$releasever/$basearch/
enabled=1
gpgcheck=0
3) Check version
# curl -V
ex) curl 7.78.0 (x86_64-redhat-linux-gnu) // 2021-08-14
