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CentOS 7 离线安装 MySQL 5.7

CentOS 7 离线安装 MySQL 5.7

作者: 王某某的笔记 | 来源:发表于2020-11-06 21:51 被阅读0次

2017年8月


  1. 确定系统版本
cat /etc/redhat-release

# CentOS Linux release 7.2.1511 (Core) 

  1. 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
  1. 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

  1. 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  
  1. 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%]
  1. 启动
systemctl start mysqld
  1. 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> 
  1. 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

  1. 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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