Linux安装mysql

目录

1.删除原有的mysql

2.下载安装包

3.下载rpm包

4.安装MySQL服务

5.启动MySQL服务

6.查看初始密码

7.登录

8.查看密码策略

9.修改密码策略

10.修改密码

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1.删除原有的mysql

rpm -qa | grep mysql
#可能的显示情况如下
#mysql-community-libs-8.0.12-1.el7.x86_64
#mysql80-community-release-el7-1.noarch
#mysql-community-client-8.0.12-1.el7.x86_64
#mysql-community-common-8.0.12-1.el7.x86_64
#mysql-community-server-8.0.12-1.el7.x86_64
#通过下面的命令进行删除
yum remove mysql-xxx-xxx-


#查找mysql的相关文件
find / -name mysql

#根据自身的需求删除mysql的配置文件信息
rm -rf /var/lib/mysql

2.下载安装包

[root@iZwz9j1nogjvowrlo3htsyZ ~]# wget -i -c https://dev.mysql.com/get/mysql80-community-release-el7-3.noarch.rpm

3.下载rpm包

 yum -y install mysql80-community-release-el7-3.noarch.rpm

4.安装MySQL服务

 yum -y install mysql-community-server --nogpgcheck

5.启动MySQL服务

systemctl start  mysqld.service

6.查看初始密码

grep "password" /var/log/mysqld.log

7.登录

mysql -u root -p

8.查看密码策略

SHOW VARIABLES LIKE 'validate_password%';

9.修改密码策略

set global validate_password.policy=0;
set global validate_password.length=1;

10.修改密码

set password = '123456';