列出旧的MySql
yum list installed | grep -i mysql
删除旧的MySql
yum remove mysql mysql-*
Remi对CentOS 6和Red Hat（RHEL）6的依赖性
rpm -Uvh http://dl.fedoraproject.org/pub/epel/6/i386/epel-release-6-8.noarch.rpmrpm -Uvh http://rpms.famillecollet.com/enterprise/remi-release-6.rpm
安装MySQL服务器
yum --enablerepo=remi,remi-test install mysql mysql-server
列出新的MySql
yum list installed | grep -i mysql
启动MySql服务器
/etc/init.d/mysqld start##更新后使用重新启动
要么
service mysqld start##更新后使用重新启动
chkconfig --levels 235 mysqld on
持续
mysql_upgrade -u root -p
现在我的MySql版本是5.5.32
参考：
http://www.webtatic.com/packages/mysql55/
http://www.if-not-true-then-false.com/2010/install-mysql-on-fedora-centos-
red-hat-rhel/
希望对你有所帮助
注意： 从@pim添加评论（以评论为准）
Just wanted to add that after the upgrade, my crontab was removed as well. Had to reinstall with "yum install vixie-cron" (CentOS 6)
