CentOs install MySQL

1 Introduction

In the past, every new environment installation was Baidu, so that the installation method may be different every time, and may not be successful at one time. In order to save time in the future, so record the CentOsinstallation MySQLmethod today . Take CentOs 7an example here .

2. Add yml source

The current mainstream MySQL of the project is still 5.7, so 5.7 is also installed here

Download the source installation package

wget http://dev.mysql.com/get/mysql57-community-release-el7-11.noarch.rpm

installation:

yum localinstall mysql57-community-release-el7-11.noarch.rpm

3. Install and start the service

installation:

yum -y install mysql-community-server

The download is a bit slow, even if you switch the source, it's almost the same, just have a cup of coffee or do something else.

Start the service:

systemctl start mysqld 

Set power-on auto-start

systemctl enable mysqld

4. Modify the default password

View the default password:

grep 'temporary password' /var/log/mysqld.log 

log in:

mysql -u root -p密码

Modify the default password:

ALTER USER 'root'@'localhost' IDENTIFIED BY 'youPassword';

5. Open the remote connection

Allow a user to connect remotely and refresh permissions

GRANT ALL PRIVILEGES ON *.* TO 'username'@'%' IDENTIFIED BY 'password' WITH GRANT OPTION;
flush privileges;

Turn on the firewall and open port 3306

systemctl start firewalld.service
firewall-cmd --permanent --remove-port=3306/tcp

Other related firewall commands:

• systemctl start firewalld: Turn on the firewall
• firewall-cmd --add-port=8080/tcp --permanent: Open port 8080
• firewall-cmd --reload:Reload
• firewall-cmd --query-port=123/tcp: Query whether the specified port is successfully opened
• firewall-cmd --permanent --remove-port=123/tcp: Close the designated port
• firewall-cmd --zone=public --list-ports: View all open ports

Reference:
https://segmentfault.com/a/1190000018442644