Ubuntu18.04安装MySQL数据库

 

1.检查系统有没有安装MySQL

命令：dpkg -l | grep mysql

 

 

 2.安装MySQL

命令：apt  install mysql-server

 

 

 

 3.检查是否安装成功

命令:netstat -tap | grep mysql

 

登录数据库：mysql -u root -p

 

 

 

 查看当前安装数据库表：show databases;

 

 为了确保数据库的安全性和正常运转，对数据库进行初始化操作。

root@VM-0-17-ubuntu:/home/ubuntu# mysql_secure_installation

Securing the MySQL server deployment.

Connecting to MySQL using a blank password.

VALIDATE PASSWORD PLUGIN can be used to test passwords
and improve security. It checks the strength of password
and allows the users to set only those passwords which are
secure enough. Would you like to setup VALIDATE PASSWORD plugin?    # 要安装验证密码插件吗?

Press y|Y for Yes, any other key for No: N    # 这里我选择N
Please set the password for root here.

New password:   # 输入要为root管理员设置的数据库密码

Re-enter new password:   # 再次输入密码

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. This is intended only for
testing, and to make the installation go a bit smoother.
You should remove them before moving into a production
environment.

Remove anonymous users? (Press y|Y for Yes, any other key for No) : y     # 删除匿名账户
Success.

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) : N    # 禁止root管理员从远程登录，这里我没有禁止

... skipping.
By default, MySQL comes with a database named 'test' that
anyone can access. This is also intended only for testing,
and should be removed before moving into a production
environment.

Remove test database and access to it? (Press y|Y for Yes, any other key for No) : y   # 删除test数据库并取消对它的访问权限
- Dropping test database...
Success.

- Removing privileges on test database...
Success.

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   # 刷新授权表，让初始化后的设定立即生效
Success.

All done!

 

 

 

 

 检查MySQL服务状态：systemctl status mysql

 

 

 

 

 

 配置mysql允许远程访问，首先编辑 /etc/mysql/mysql.conf.d/mysqld.cnf 配置文件：vim /etc/mysql/mysql.conf.d/mysqld.cnf

 

保存退出，然后进入mysql数据库，执行授权命令：

mysql -u root -p

mysql> grant all on *.* to root@'%' identified by '你的密码' with grant option;

mysql> flush privileges;    # 刷新权限

mysql> exit

 

 重启MySQL服务：systemctl restart mysql

连接数据库参考：https://www.cnblogs.com/nzcblogs/p/11141023.html