下面看下Ubuntu 18.04.4安装mysql的过程，内容如下所示：
1 sudo apt-get update
2 sudo apt-get install mysql-server
3 sudo mysql_secure_installation # 初始化配置 #1 VALIDATE PASSWORD PLUGIN can be used to test passwords... Press y|Y for Yes, any other key for No: N (我的选项) #2 Please set the password for root here... New password: (输入密码) Re-enter new password: (重复输入) #3 By default, a MySQL installation has an anonymous user, allowing anyone to log into MySQL without having to have a user account created for them... Remove anonymous users? (Press y|Y for Yes, any other key for No) : N (我的选项) #4 Normally, root should only be allowed to connect from 'localhost'. This ensures that someone cannot guess at the root password from the network... Disallow root login remotely? (Press y|Y for Yes, any other key for No) : Y (我的选项) #5 By default, MySQL comes with a database named 'test' that anyone can access... Remove test database and access to it? (Press y|Y for Yes, any other key for No) : N (我的选项) #6 Reloading the privilege tables will ensure that all changes made so far will take effect immediately. Reload privilege tables now? (Press y|Y for Yes, any other key for No) : Y (我的选项) 4 systemctl status mysql.service # 检查服务器状态
4 systemctl status mysql.service # 检查服务器状态
running代表无问题
5 修改mysql 端口号以及将监听地址改为所有 vim /etc/mysql/mysql.conf.d/mysqld.cnf # 编辑配置文件 bind-address = 0.0.0.0 #将监听ip修改为所有 port = 3388 # 监听端口修改为3388，可以不改我这是为了安全 修改完毕之后重启服务 systemctl restart mysql.service
6 开放mysql远程访问 1 登录数据库 mysql -u root -p 2 切换到数据库mysql use mysql 3 删除匿名用户 delete from user where user=''; 4 增加允许远程访问的用户或者允许现有用户的远程访问 给root授予在任意主机（%）访问任意数据库的所有权限 mysql> grant all privileges on *.* to 'root'@'%' identified by '这里替换成你想要设置的密码' with grant option; flush privileges; 5 退出数据库 mysql> exit 6 重启数据库 sudo service mysql restart
