步骤1：用yum安装wget
# yum install wget
步骤2：用wget下载mysql repository
# wget https://dev.mysql.com/get/mysql57-community-release-el6-11.noarch.rpm
步骤3：安装mysql repository
# rpm -ivh mysql57-community-release-el6-11.noarch.rpm
warning: mysql57-community-release-el6-11.noarch.rpm: Header V3 DSA/SHA1 Signature, key ID 5072e1f5: NOKEY
Preparing... ########################################### [100%]
1:mysql57-community-relea########################################### [100%]
步骤4：安装mysql5.7
# yum repolist enabled | grep mysql
tors-community MySQL Connectors Community 36
mysql-tools-community MySQL Tools Community 47
mysql57-community MySQL 5.7 Community Server 183
# yum install mysql-community-server
步骤5：修改root密码
#service mysqld start
Initializing MySQL database: [ OK ]
Installing validate password plugin: [ OK ]
Starting mysqld: [ OK ]
#grep 'temporary password' var/log/mysqld.log
2017-05-08T08:18:29.118254Z 1 [Note] A temporary password is generated for root@localhost: t+uQ.8:r:Oyx
#mysql -uroot -pt+uQ.8:r:Oyx
mysql>ALTER USER 'root'@'localhost' IDENTIFIED BY 'Welcome1!';
Query OK, 0 rows affected (0.00 sec)
#mysql -uroot -pWelcome1!
