安装mysql

获取官方下载地址 https://dev.mysql.com/downloads/repo/yum/

下载mysql安装包 ：wget https://repo.mysql.com//mysql80-community-release-el8-1.noarch.rpm

将下载好的安装包挂载到本地：yum localinstall mysql80-community-release-el8-1.noarch.rpm

查看是否挂载成功：yum repolist enabled | grep "mysql.*-community.*"

禁用centos8.0自带的mysql模块：yum module disable mysql

安装mysql：yum install mysql-community-server

如果出现nogpgcheck错误

yum install mysql-community-server --nogpgcheck

启动mysql服务service mysqld start
查看mysql服务启动状态service mysqld status

mysql服务相关命令

启动服务：service mysqld start
停止服务：service mysqld stop
重启服务：service mysqld restart
查看服务状态：service mysqld status

设置mysql开机自启：
systemctl enable mysqld
systemctl daemon-reload

修改mysql密码并开放远程连接

查看mysql安装时生成的随机密码：grep 'temporary password' /var/log/mysqld.log

登录mysql

mysql -uroot -p'刚获取到的随机密码'

安装mysql后第一次登录需要修改密码

ALTER USER 'root' @'localhost' IDENTIFIED BY '你的密码';

开放mysql远程访问

创建权限记录：
CREATE user 'root'@'%' IDENTIFIED BY 'root123';

授权：
GRANT ALL PRIVILEGES ON *.* TO 'root' @'%' WITH GRANT OPTION;

修改密码过期策略：
ALTER USER 'root' @'localhost' IDENTIFIED BY '你的密码' PASSWORD EXPIRE NEVER;

重新修改密码：
ALTER USER 'root' @'%' IDENTIFIED WITH mysql_native_password BY '你的密码';

刷新权限：
FLUSH PRIVILEGES;