#Install MySQL Database 5.5.37 on CentOS 6.5/5.10, Red Hat (RHEL) 6.5/5.10
Install Remi repository
sudo rpm -Uvh http://dl.fedoraproject.org/pub/epel/6/i386/epel-release-6-8.noarch.rpm
sudo rpm -Uvh http://rpms.famillecollet.com/enterprise/remi-release-6.rpm
Check Available MySQL versions
yum --enablerepo=remi,remi-test list mysql mysql-devel mysql-server
Update or Install MySQL 5.5.37
yum --enablerepo=remi,remi-test install mysql mysql-server
Start MySQL server and autostart MySQL on boot
/etc/init.d/mysqld start ## use restart after update## OR ##service mysqld start ## use restart after update chkconfig --levels 235 mysqld on
ldconfig -p | grep mysql
gem install mysql2 -v '0.3.17'