Ubuntu18.04 安装MySQL

Posted 2020-12-20 菜鸟的菜_疯子

环境信息：

OS：Ubuntu18.04
mysql: 5.7.22

安装MYSQL

在Ubuntu中，默认情况下，只有最新版本的MySQL包含在APT软件包存储库中,要安装它，只需更新服务器上的包索引并安装默认包apt-get。

#命令1
sudo apt-get update
#命令2
sudo apt-get install mysql-server

　　

 

 初始化配置

sudo mysql_secure_installation

　　具体配置项如下：

#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)

检查mysql服务状态

systemctl status mysql.service

 

 

 

 

配置远程访问

在Ubuntu下MySQL缺省是只允许本地访问的，使用客户端连接工具是连不上的；
如果你要其他机器也能够访问的话，需要进行配置；

步骤如下：

sudo mysql -uroot -proot

 

 

grant all privileges on *.* to root@\'%\' identified by \'root\';
flush privileges;

 

 使用客户端工具尝试连接，如果连不上：

查看3306端口是否开启：

netstat -an|grep 3306

 

 

由此可见，3306端口只是在IP 127.0.0.1上监听，所以拒绝了其他IP的访问。

解决方法：

sudo vim /etc/mysql/mysql.conf.d/mysqld.cnf 

把其中的bind-address  = 127.0.0.1直接注释掉。

 

重启mysql服务

 

sudo service mysql restart

 

 客户端连接测试成功。