La Universidad de las Ciencias Informáticas brinda actualizaciones a las siguientes versiones de CentOS:

#Centos 6

[centos-base]
name=CentOS – UCI – Base
baseurl=http://centos.uci.cu/centos/6.7/os/$basearch/
gpgcheck=1
enabled=1
gpgkey=http://centos.uci.cu/centos/6.7/os/$basearch/RPM-GPG-KEY-CentOS-6
 
[centos-updates]
name=CentOS – UCI – Updates
baseurl=http://centos.uci.cu/centos/6.7/updates/$basearch/
gpgcheck=1
enabled=1
gpgkey=http://centos.uci.cu/centos/6.7/updates/$basearch/RPM-GPG-KEY-CentOS-6
 
[centos-extras]
name=CentOS – UCI – Extras
baseurl=http://centos.uci.cu/centos/6.7/extras/$basearch/
gpgcheck=1
enabled=1
gpgkey=http://centos.uci.cu/centos/6.7/extras/$basearch/RPM-GPG-KEY-CentOS-6
 
[centos-plus]
name=CentOS – UCI – Plus
baseurl=http://centos.uci.cu/centos/6.7/centosplus/$basearch/
gpgcheck=1
enabled=1
gpgkey=http://centos.uci.cu/centos/6.7/centosplus/$basearch/RPM-GPG-KEY-CentOS-6
 
[centos-epel]
name=Extra Packages for Enterprise Linux 6 – $basearch
baseurl=http://centos.uci.cu/epel/6/$basearch/
gpgcheck=1
enabled=1

#Centos 7

[centos-base]
name=CentOS – UCI – Base
baseurl=http://centos.uci.cu/centos/7/os/$basearch/
gpgcheck=1
enabled=1
gpgkey=http://centos.uci.cu/centos/7/os/$basearch/RPM-GPG-KEY-CentOS-7
 
[centos-updates]
name=CentOS – UCI – Updates
baseurl=http://centos.uci.cu/centos/7/updates/$basearch/
gpgcheck=1
enabled=1
gpgkey=http://centos.uci.cu/centos/7/updates/$basearch/RPM-GPG-KEY-CentOS-7
 
[centos-extras]
name=CentOS – UCI – Extras
baseurl=http://centos.uci.cu/centos/7/extras/$basearch/
gpgcheck=1
enabled=1
gpgkey=http://centos.uci.cu/centos/7/extras/$basearch/RPM-GPG-KEY-CentOS-7
 
[centos-plus]
name=CentOS – UCI – Plus
baseurl=http://centos.uci.cu/centos/7/centosplus/$basearch/
gpgcheck=1
enabled=1
gpgkey=http://centos.uci.cu/centos/7/centosplus/$basearch/RPM-GPG-KEY-CentOS-7
 
[centos-epel]
name=Extra Packages for Enterprise Linux 7 – $basearch
baseurl=http://centos.uci.cu/epel/7/$basearch/
gpgcheck=1
enabled=1
gpgkey=http://centos.uci.cu/epel/RPM-GPG-KEY-EPEL-7

NOTA: Si no sabe cómo configurar los repos en CentOS en este artículo le muestran una de las vías para hacerlo.