Centos7安裝mysql5.6教程

1、下載mysql的repo源
wget http://repo.mysql.com/mysql-community-release-el7-5.noarch.rpm

可能遇見的問題：wget未找到命令

解決方案：yum -y install wget

2、安裝mysql-community-release-el7-5.noarch.rpm包
sudo rpm -ivh mysql-community-release-el7-5.noarch.rpm
安裝完這個包後，會獲得兩個mysql的yum repo源：/etc/yum.repos.d/mysql-community.repo，/etc/yum.repos.d/mysql-community-source.repo。
3、安裝mysql
sudo yum install mysql-server
安裝完的配置
1、加入開機啓動
systemctl enable mysqld
2、啓動mysql服務進程
systemctl start mysqld
3、重置密碼
[root@localhost ~]# mysql_secure_installation
NOTE: RUNNING ALL PARTS OF THIS SCRIPT IS RECOMMENDED FOR ALL MySQL
SERVERS IN PRODUCTION USE! PLEASE READ EACH STEP CAREFULLY!
In order to log into MySQL to secure it, we’ll need the current
password for the root user. If you’ve just installed MySQL, and
you haven’t set the root password yet, the password will be blank,
so you should just press enter here.
Enter current password for root (enter for none):
OK, successfully used password, moving on…

Setting the root password ensures that nobody can log into the MySQL
root user without the proper authorisation.
You already have a root password set, so you can safely answer ‘n’.
Change the root password? [Y/n] y [設置root用戶密碼]
New password:
Re-enter new password:
Password updated successfully!
Reloading privilege tables…
… Success!

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? [Y/n] y [刪除匿名用戶]
… 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? [Y/n] n [禁止root遠程登錄]
… 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? [Y/n] y [刪除test數據庫]

• Dropping test database…
  ERROR 1008 (HY000) at line 1: Can’t drop database ‘test’; database doesn’t exist
  … Failed! Not critical, keep moving…
• 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? [Y/n] y [刷新權限]
  … Success!
  All done! If you’ve completed all of the above steps, your MySQL
  installation should now be secure.
  Thanks for using MySQL!
  Cleaning up…

4、授權遠程登錄
（1）登錄mysql數據庫 Mysql -u root -p

（2）授權登錄
登錄mysql之後執行

注：此處的password指的是root用戶的密碼）

5、開放端口號
firewall-cmd –add-port=3306/tcp –permanent

6、重啓防火牆
service firewalld restart

原文：https://blog.csdn.net/wyj19950908/article/details/79684574