How to install mysql in centos7

The key to installing MySQL elegantly is to add the official MySQL repository. The specific steps are as follows: Download the MySQL official GPG key to prevent phishing attacks. Add MySQL repository file: rpm -Uvh https://dev.mysql.com/get/mysql80-community-release-el7-3.noarch.rpm Update yum repository cache: yum update Install MySQL: yum install mysql-server start MySQL service: systemctl start mysqld set up booting

How to install MySQL elegantly in CentOS 7?

Many friends asked about installing MySQL on CentOS 7, which felt like walking a tightrope, and if you were not careful, you would fall into a pit. In fact, as long as you master the trick, this is much simpler than you think. In this article, I will not tell you those boring steps, but will take you to understand in depth, allowing you to unblock the road along the way to install MySQL, and even experience a little elegance.

First of all, you have to understand why you need to be elegant? It is not enough to just successfully install it. What we need to pursue is an efficient, safe and maintainable installation process. The goal of this article is to allow you to not only install MySQL, but also understand the principles behind it and avoid those common pitfalls. After reading it, you can easily deal with various MySQL installation scenarios like an experienced driver.

Basic knowledge lays the foundation:

Don't rush to do it, let's talk about CentOS's package management mechanism yum. It is like a supermarket that helps you manage system software. The core of yum is a repository, which stores various software packages. By default, the CentOS 7 repository contains basic software, but MySQL is not usually included. So, we need to add the official repository of MySQL.

Core: Add MySQL official repository

This is the key step and it is also a place where many novices are prone to making mistakes. Don’t download any messy RPM packages, it’s the most reliable to use the official warehouse directly. The official will update regularly to ensure that you are using the latest and most stable version.

For specific operations, you have to download the official GPG key of MySQL first and then add the repository file. There are many tutorials on this part of the operation, so I won't repeat it here, but I would like to remind you to pay attention: carefully check whether the downloaded GPG key is consistent with the official one to avoid being phished. This is related to your server security and must not be careless!

Practical operation:

OK, let's get some code. I prefer using curl command because it is simple and efficient:

 <code class="bash">rpm -Uvh https://dev.mysql.com/get/mysql80-community-release-el7-3.noarch.rpm</code>

This line of command will download and install MySQL's official repository files. Version number 80 You can modify it as needed and select the MySQL version you want. Pay attention to check the source of the file and make sure it is an official link.

Then, update the yum repository cache:

 <code class="bash">yum update</code>

Finally, install MySQL:

 <code class="bash">yum install mysql-server</code>

Simple? But this is just the first step.

Startup and Security Settings:

After installation, don't forget to start the MySQL service:

 <code class="bash">systemctl start mysqld</code>

Then set up the power-on self-start:

 <code class="bash">systemctl enable mysqld</code>

What’s more important is the security settings! The default MySQL root password is empty, which is simply a disaster! Be sure to modify the root password immediately. This step can be accomplished using the mysql_secure_installation command. This command will guide you through a series of security settings, such as modifying the root password, deleting anonymous users, etc. Don’t bother, safety comes first!

Performance optimization and best practices:

Complete installation is only the first step in the Long March. MySQL performance optimization is a big topic, here are only a few points:

• Choose the right storage engine: InnoDB is the first choice for most scenarios, but MyISAM may also be more suitable for certain specific applications.
• Reasonable database design: A good database design can significantly improve performance.
• Monitoring and tuning: Regularly monitor the running status of MySQL to promptly discover and resolve performance bottlenecks.

Finally, remember to keep your system and MySQL server updated to the latest version, which is critical for security and stability.

This article not only teaches you how to install MySQL, but also teaches you how to install gracefully, how to think, and how to avoid traps. I hope you will benefit from it and become a MySQL expert! Remember, safety and performance are always first.

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