Step1: 检测系统是否自带安装MysqL

# yum list installed | grep MysqL

Step2: 删除系统自带的MysqL及其依赖命令：

# yum -y remove MysqL-libs.x86_64

Step3: 给CentOS添加rpm源，并且选择较新的源命令：

# wget dev.MysqL.com/get/MysqL-community-release-el6-5.noarch.rpm
# yum localinstall MysqL-community-release-el6-5.noarch.rpm
# yum repolist all | grep MysqL
# yum-config-manager --disable MysqL55-community
# yum-config-manager --disable MysqL56-community
# yum-config-manager --enable MysqL57-community-dmr
# yum repolist enabled | grep MysqL

Step4:安装MysqL 服务器命令：

# yum install MysqL-community-server

Step5: 启动MysqL命令:

# service MysqLd start

Step6: 查看MysqL是否自启动,并且设置开启自启动命令:

# chkconfig --list | grep MysqLd
# chkconfig MysqLd on

Step7: MysqL安全设置命令：

# MysqL_secure_installation