Ubuntu18.04下安装MySQL（图⽂教程）
提⽰：以下操作均在root权限下进⾏。
# 查看有没有安装MySQL：
dpkg -l | grep mysql
# 安装MySQL：
apt install mysql-server
安装完成之后可以使⽤如下命令来检查是否安装成功：
netstat -tap | grep mysql
通过上述命令检查之后，如果看到有 mysql 的socket处于 LISTEN 状态则表⽰安装成功。
登录mysql数据库可以通过如下命令：
mysql -u root -p
-u 表⽰选择登陆的⽤户名， -p 表⽰登陆的⽤户密码，现在是mysql数据库是没有密码的，Enter password：处直接回车，就能够进⼊mysql数据库。
然后通过 show databases; 就可以查看当前的所有数据库。
接下来，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。这个初始化操作涉及下⾯5个步骤。（1）安装验证密码插件。
（2）设置root管理员在数据库中的专有密码。
（3）随后删除匿名账户，并使⽤root管理员从远程登录数据库，以确保数据库上运⾏的业务的安全性。
（4）删除默认的测试数据库，取消测试数据库的⼀系列访问权限。
（5）刷新授权列表，让初始化的设定⽴即⽣效。
对于上述数据库初始化的操作步骤，在下⾯的输出信息旁边我做了简单注释。
root@ubuntu-virtual-machine:~# 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
Success.
- Removing privileges on
Success.
Reloading the privilege tables will ensure that all changes
made so far will take effect immediately.
简述安装mysql的过程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
显⽰如下结果说明mysql服务运⾏是正常的：
再次⽤mysql -u root -p命令，Enter password：处输⼊刚设置的密码，回车，就能够进⼊mysql数据库。
使⽤ use mysql; 命令打开mysql命名的数据库，显⽰当前数据库的表：show tables; 查询user表⾥的数据：select * from user;（user表⾥是mysql数据库的所有账户信息）
现在配置mysql允许远程访问，⾸先编辑/etc/f.d/mysqldf 配置⽂件：vim /etc/f.d/mysqldf
注释掉bind-address = 127.0.0.1
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

版权声明：本站内容均来自互联网，仅供演示用，请勿用于商业和其他非法用途。如果侵犯了您的权益请与我们联系QQ:729038198，我们将在24小时内删除。