Linux下mysql5.7.28安装

1）/opt/software目录下上传MySQL安装包以及MySQL驱动jar包

链接: 百度网盘 请输入提取码 提取码: hp2x

mysql-5.7.28-1.el7.x86_64.rpm-bundle.tar
mysql-connector-java-5.1.37.jar

2）解压MySQL安装包

[shuidi@hadoop201 software]$ mkdir mysql_lib
[shuidi@hadoop201 software]$ tar -xf mysql-5.7.28-1.el7.x86_64.rpm-bundle.tar -C mysql_lib/

3）卸载系统自带的mariadb

[shuidi@hadoop201 mysql_lib]$ sudo rpm -qa | grep mariadb | xargs sudo rpm -e --nodeps

4）安装MySQL依赖

[shuidi@hadoop201 mysql_lib]$ sudo rpm -ivh mysql-community-common-5.7.28-1.el7.x86_64.rpm
准备中...                          ################################# [100%]
正在升级/安装...
   1:mysql-community-common-5.7.28-1.e################################# [100%]
[shuidi@hadoop201 mysql_lib]$ sudo rpm -ivh mysql-community-libs-5.7.28-1.el7.x86_64.rpm
准备中...                          ################################# [100%]
正在升级/安装...
   1:mysql-community-libs-5.7.28-1.el7################################# [100%]
[shuidi@hadoop201 mysql_lib]$  sudo rpm -ivh mysql-community-libs-compat-5.7.28-1.el7.x86_64.rpm
准备中...                          ################################# [100%]
正在升级/安装...
   1:mysql-community-libs-compat-5.7.2################################# [100%]

5）安装mysql-client

[shuidi@hadoop201 mysql_lib]$ sudo rpm -ivh mysql-community-client-5.7.28-1.el7.x86_64.rpm

6）安装mysql-server

[shuidi@hadoop201 mysql_lib]$ sudo rpm -ivh mysql-community-server-5.7.28-1.el7.x86_64.rpm

注意：若出现以下错误

warning: 05_mysql-community-server-5.7.16-1.el7.x86_64.rpm: Header V3 DSA/SHA1 Signature, key ID 5072e1f5: NOKEY
error: Failed dependencies:
libaio.so.1()(64bit) is needed by mysql-community-server-5.7.16-1.el7.x86_64

解决办法：

sudo yum -y install libaio

7）启动MySQL

[shuidi@hadoop201 mysql_lib]$ sudo systemctl start mysqld

8）查看MySQL密码

[shuidi@hadoop201 mysql_lib]$ sudo cat /var/log/mysqld.log | grep password
2023-05-29T08:32:10.810903Z 1 [Note] A temporary password is generated for root@localhost: T802/Vq,K7M;

配置MySQL

配置主要是root用户 + 密码，在任何主机上都能登录MySQL数据库。

1）用刚刚查到的密码进入MySQL（如果报错，给密码加单引号）

[shuidi@hadoop201 mysql_lib]$ sudo mysql -uroot -p"T802/Vq,K7M;"

2）设置复杂密码（由于MySQL密码策略，此密码必须足够复杂）

mysql> set password=password("Zan_1234");

3）非必选 更改MySQL密码策略

mysql> set global validate_password_policy=0;
mysql> set global validate_password_length=4;

4）非必选 设置简单好记的密码

mysql> set password=password("123456");

5）进入MySQL库

mysql> use mysql

6）查询user表

mysql> select user, host from user;

7）修改user表，把Host表内容修改为%

mysql> update user set host="%" where user="root";

8）刷新

mysql> flush privileges;

9）退出

mysql> quit;