RedHat / Centos Repository you must have

RedHat and centos come with the default repo

so you have to install additional repos to get all your software from yum

1. epel
2. ius
3. remi
4. rpmfroge

rpm -ivh http://dl.iuscommunity.org/pub/ius/stable/RedHat/7/x86_64/ius-release-1.0-13.ius.el7.noarch.rpm
rpm -ivh http://dl.iuscommunity.org/pub/ius/stable/RedHat/7/x86_64/ius-release-1.0-13.ius.el7.noarch.rpm
rpm -ivh http://rpms.famillecollet.com/enterprise/remi-release-7.rpm
rpm -ivh http://pkgs.repoforge.org/rpmforge-release/rpmforge-release-0.5.3-1.el7.rf.x86_64.rpm

enjoy

this list for 64bit system centos 7

u can customise  the links as you got the link