1.安装RPM包MySQL数据库
yum -y install mysql*

2.MySQL服务管理
systemctl enable mysqld.service
systemctl start mysqld.service
systemctl stop mysqld.service
systemctl restart mysqld.service

3.查看状态
systemctl status mysqld.service

4.查看进程
pstree |grep mysqld

5.查看端口
netstat -tunpl |grep mysqld

6.修改MySQL密码
1)mysqladmin -uroot -p123 password '234';
2)set password='345';
3)alter user 'root'@'localhost' identified by '456';

7.破解MySQL密码
1)修改配置文件
vi /etc/my.cnf.d/mysql-server.cnf
skip-grant-tables

2)重启服务
systemctl restart mysqld

3)空密码登录
mysql -u root -p

4)update把root密码改为空
update user set authentication_string='' where user='root';

5)删除skip-grant-tables
vi /etc/my.cnf.d/mysql-server.cnf

skip-grant-tables

6)重启服务
systemctl restart mysqld

7)修改MySQL密码
1)mysqladmin -uroot -p123 password '234';
2)set password='345';
3)alter user 'root'@'localhost' identified by '456';

8.修改配置文件
vi /etc/my.cnf.d/mysql-server.cnf
port=3000

systemctl restart mysqld.service