版本声明
名称 版本
系统 CentOS 8
MySQL 8.0.27
卸载MySQL
如果已安装了MySQL需要先卸载
rpm -qa | grep -i mysql
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# 逐一卸载已安装的包
yum remove -y mysql-commutity-conmmon-8.0.27-1.e18.x86_64
# 删除MySQL文件
find / -name mysql -type f -print -exec rm -rf {} \;
...
安装MySQL8
1. 安装yum源
访问 MySQL官方下载地址，获取yum源地址
# 下载yum源，wget后面的地址就是上图获取的yum源地址
wget https://repo.mysql.com//mysql80-community-release-el8-1.noarch.rpm
# 安装yum源
yum -y localinstall mysql80-community-release-el8-1.noarch.rpm
2. 禁用CentOS8自带的MySQL模块
yum module disable mysql
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3. 安装MySQL服务
yum install -y mysql-community-server
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4. 启动MySQL
systemctl start mysqld
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5. 查看MySQL状态
systemctl status mysqld
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6. 设置MySQL开机自启
systemctl enable mysqld
systemctl daemon-reload
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2
设置密码
1. 获取临时密码
grep 'temporary password' /var/log/mysqld.log
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2. 登录 MySQL
mysql -uroot -pqvysykoyf4=R
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3. 修改 MySQL 新密码 123456
ALTER USER 'root' @'localhost' IDENTIFIED BY '123456';
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4. 密码简单不满足密码策略
可以提高密码复杂度，也可以降低密码策略设置简单好记的密码。
ERROR 1819 (HY000): Your password does not satisfy the current policy requirements
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查看当前密码策略
SHOW VARIABLES LIKE 'validate_password%';
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降低密码策略
set global validate_password.length=4;
set global validate_password.special_char_count=0;
set global validate_password.policy =LOW;
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开放远程连接
use mysql;
update user set host = '%' where user ='root';
alter user 'root'@'%' identified by '123456' password expire never;
alter user 'root'@'%' identified with mysql_native_password by '123456';
flush privileges;
连接OK
