2017年8月
- 确定系统版本
cat /etc/redhat-release
# CentOS Linux release 7.2.1511 (Core)
- 下载对应版本的包
包含依赖的捆绑包,如:
MySQL-5.6.35-1.el7.x86_64.rpm-bundle.tar
mysql-5.7.17-1.el7.x86_64.rpm-bundle.tar
- 卸载MariaDB
MariaDB数据库管理系统是MySQL的一个分支,主要由开源社区在维护,采用GPL授权许可。开发这个分支的原因之一是:甲骨文公司收购了MySQL后,有将MySQL闭源的潜在风险,因此社区采用分支的方式来避开这个风险。MariaDB的目的是完全兼容MySQL,包括API和命令行,使之能轻松成为MySQL的代替品。
查看当前安装的mariadb包
rpm -qa | grep mariadb
mariadb-devel-5.5.50-1.el7_2.x86_64
mariadb-libs-5.5.50-1.el7_2.x86_64
#卸载 mariadb
rpm -e mariadb-devel-5.5.50-1.el7_2.x86_64
#强制卸载
rpm -e --nodeps mariadb-libs-5.5.50-1.el7_2.x86_64
- 创建用户
安装之前先添加mysql用户组及mysql用户
groupadd mysql
useradd -r -g mysql mysql
- 安装
这里安装的是 MySQL 5.7
rpm -ivh mysql-community-common-5.7.17-1.el7.x86_64.rpm
警告:mysql-community-common-5.7.17-1.el7.x86_64.rpm: 头V3 DSA/SHA1 Signature, 密钥 ID 5072e1f5: NOKEY
准备中... ################################# [100%]
正在升级/安装...
1:mysql-community-common-5.7.17-1.e################################# [100%]
rpm -ivh mysql-community-libs-5.7.17-1.el7.x86_64.rpm
警告:mysql-community-libs-5.7.17-1.el7.x86_64.rpm: 头V3 DSA/SHA1 Signature, 密钥 ID 5072e1f5: NOKEY
准备中... ################################# [100%]
正在升级/安装...
1:mysql-community-libs-5.7.17-1.el7################################# [100%]
rpm -ivh mysql-community-client-5.7.17-1.el7.x86_64.rpm
警告:mysql-community-client-5.7.17-1.el7.x86_64.rpm: 头V3 DSA/SHA1 Signature, 密钥 ID 5072e1f5: NOKEY
准备中... ################################# [100%]
正在升级/安装...
1:mysql-community-client-5.7.17-1.e################################# [100%]
rpm -ivh mysql-community-server-5.7.17-1.el7.x86_64.rpm
警告:mysql-community-server-5.7.17-1.el7.x86_64.rpm: 头V3 DSA/SHA1 Signature, 密钥 ID 5072e1f5: NOKEY
准备中... ################################# [100%]
正在升级/安装...
1:mysql-community-server-5.7.17-1.e################################# [100%]
- 启动
systemctl start mysqld
- 登录
找到临时密码
grep 'temporary password' /var/log/mysqld.log
2017-02-10T15:48:22.225974Z 1 [Note] A temporary password is generated for root@localhost: H7k#D;u;&aK(
登录成功
mysql -uroot -p
Enter password:
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 6
Server version: 5.7.17
Copyright (c) 2000, 2016, Oracle and/or its affiliates. All rights reserved.
Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
mysql>
- 修改密码
ALTER USER 'root'@'localhost' IDENTIFIED BY 'root';
一般来说这个密码是属于一个弱强度密码,mysql不会接收这个密码,并产生下面的报错信息:
ERROR 1819 (HY000): Your password does not satisfy the current policy requirements
降低Mysql的密码检验强度:
set global validate_password_policy=0;
这个设置下会只检查长度,默认长度为8,也就是是说密码长度至少为8.
要查看这个长度的值,可以这样做:
select @@validate_password_length;
修改密码长度:
set global validate_password_length=1;
然后就可以修改密码了
- 设置Mysql远程访问
grant all privileges on *.* to 'root'@'%' identified by 'root' with grant option;
使授权生效
flush privileges;
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