在linux系统上构建mysql服务器

# systemctl start mysqld

# systemctl enable mysqld //设置开机自启

# systemctl status mysqld

[root@proxy mysql]# ss -antulp | grep mysqld //查看服务启动端口

# ps aux | grep mysqld //查进程

# grep password /var/log/mysqld.log

#  grep 'temporary password' /var/log/mysqld.log //随机生成的管理密码

# mysql -hlocalhost -uroot -p'pIhMu,i2OS#,' //用初始密码登录

mysql> \h //登录成功后，查可用的快捷键

mysql> alter user root@"localhost" identified by "123qqq...A";

mysql> show variables like "%password%";              //查询密码有关的变量

mysql> set global validate_password_policy=0;       //只验证长度

mysql> set global validate_password_length=6;      //修改密码长度为6位

mysql> alter user root@"localhost" identified by "123456";             //修改root密码为123456