1.切换到root用户

su -
## OR ##
sudo -i

2.安装mysql的yum源

## Fedora 25 ##
dnf install https://dev.mysql.com/get/mysql57-community-release-fc25-9.noarch.rpm

## Fedora 24 ##
dnf install https://dev.mysql.com/get/mysql57-community-release-fc24-9.noarch.rpm

## Fedora 23 ##
dnf install https://dev.mysql.com/get/mysql57-community-release-fc23-9.noarch.rpm

3.安装mysql 5.7.17

Fedora 25/24/23

dnf install mysql-community-server

4.设置开机启动mysql服务

systemctl start mysqld.service ## use restart after update

systemctl enable mysqld.service

5.设置一个root用户随机密码,用来登陆mysql修改密码

grep 'A temporary password is generated for root@localhost' /var/log/mysqld.log |tail -1

Example Output:

2015-11-20T21:11:44.229891Z 1 [Note] A temporary password is generated for root@localhost: -et)QoL4MLid

6.修改密码

使用这个命令

/usr/bin/mysql_secure_installation

输出

Securing the MySQL server deployment.

Enter password for user root: 
The 'validate_password' plugin is installed on the server.
The subsequent steps will run with the existing configuration
of the plugin.
Using existing password for root.

Estimated strength of the password: 100 
Change the password for root ? ((Press y|Y for Yes, any other key for No) : Y

New password: 

Re-enter new password: 

Estimated strength of the password: 100 
Do you wish to continue with the password provided?(Press y|Y for Yes, any other key for No) : Y
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
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) : Y
Success.

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
 - 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
Success.

All done! 

7.可以连接到mysql了

mysql -u root -p

## OR ##
mysql -h localhost -u root -p