Centos7安装Mysql5.7

1.卸载已安装的Mysql与Mariadb

# rpm -qa | grep mysql | xargs rpm -e --nodeps
# rpm -qa | grep mariadb | xargs rpm -e --nodeps

2.将安装包mysql-5.7.14-1.el7.x86_64.rpm-bundle.tar上传到服务器/opt/mysql目录下

3.进入/opt/mysql目录，解压

# tar -xvf mysql-5.7.14-1.el7.x86_64.rpm-bundle.tar
# rm -rf mysql-5.7.14-1.el7.x86_64.rpm-bundle.tar

4.按照依赖关系依次安装rpm包

依赖关系依次为common→libs→client→server

# rpm -ivh mysql-community-common-5.7.14-1.el7.x86_64.rpm
# rpm -ivh mysql-community-libs-5.7.14-1.el7.x86_64.rpm
# rpm -ivh mysql-community-client-5.7.14-1.el7.x86_64.rpm
# rpm -ivh mysql-community-server-5.7.14-1.el7.x86_64.rpm

5.启动Mysqld服务并添加到开机自启动

# systemctl start mysqld
# systemctl enable mysqld

6.查看Mysqld状态

# systemctl status mysqld

7.找到临时登录密码

# vi /var/log/mysqld.log

8.登录

# mysql -u root -p

然后输入上一步的密码登录

9.修改root密码

alter user 'root'@'localhost' identified by 'root';

在5.6后，mysql内置密码增强机制，低强度密码会报错：

ERROR 1819 (HY000): Your password does not satisfy the current policy requirements

配置root远程登录

use mysql;
GRANT ALL PRIVILEGES ON *.* TO 'root'@'%' IDENTIFIED BY 'root' WITH GRANT OPTION;