$ bzip2 /etc/yum.repos.d/CentOS-*.repo
$ yum repolist
$ ll /etc/yum.repos.d/
$ echo "[base]
name=CentOS-7 - Base
baseurl=http://mirror.kakao.com/centos/7/os/x86_64/
gpgcheck=0
[updates]
name=CentOS-7 - Updates
baseurl=http://mirror.kakao.com/centos/7/updates/x86_64/
gpgcheck=0
[extras]
name=CentOS-7 - Extras
baseurl=http://mirror.kakao.com/centos/7/extras/x86_64/
gpgcheck=0" > /etc/yum.repos.d/Kakao.repo
[base]
name=CentOS-$releasever - Base
baseurl=http://mirror.kakao.com/centos/$releasever/os/$basearch/
gpgcheck=0
[updates]
name=CentOS-$releasever - Updates
baseurl=http://mirror.kakao.com/centos/$releasever/updates/$basearch/
gpgcheck=0
[extras]
name=CentOS-$releasever - Extras
baseurl=http://mirror.kakao.com/centos/$releasever/extras/$basearch/
gpgcheck=0
$ yum repolist
$ yum update