centos7 安装mysql5.7

# mysql -V
 mysql Ver 14.14 Distrib 5.7.11, for Linux (x86_64) using EditLine wrapper

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

# yum -y remove mysql-libs

Step3: 给CentOS添加rpm源，并且选择较新的源

# 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

#yum install mysql-community-server

Step5: 启动mysql

#service mysqld start

Step6: 查看mysql是否自启动,并且设置开启自启动

# chkconfig --list | grep mysqld
# chkconfig mysqld on

Step7: mysql root密码查找
密码保存在临时文件里：/var/log/mysqld.log命令：

# grep "temporary password" /var/log/mysqld.log
 2016-03-25T08:28:24.920752Z 1 [Note] A temporary password is generated for root@localhost: <5%vn9JFxmUz

Step8:重设root 创建新用户远程
命令：

# mysql -uroot -p
 Enter password:
 mysql: use mysql; //不重新设置密码会报错。
 ERROR 1820 (HY000): You must reset your password using ALTER USER statement before executing this statement.
 mysql: SET PASSWORD = PASSWORD("Your-password"); //设置密码
 Query OK, 0 rows affected, 1 warning (0.00 sec)
 mysql: grant all privileges on *.* to username@localhost identified by "password" ; //创建新用户
 Query OK, 0 rows affected, 1 warning (0.00 sec)
 mysql: grant all privileges on *.* to username@"%" identified by "password" ; //设置远程权限
 Query OK, 0 rows affected, 1 warning (0.00 sec)

参考相关文档地址:
CentOS 6.5/6.6 安装mysql 5.7 最完整版教程