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

问题：

请一次日志，再次启动

查看日志

日志提示内存出故障，查看内存

Swap为0，添加128M

Root密码修改问题
在之前的版本中，密码字段的字段名是 password，5.7版本改为了 authentication_string
命令:

update user set authentication_string = password('password'), password_expired = 'N', password_last_changed = now() where user = 'root';