How to install mysql in centos7
Apr 14, 2025 pm 08:30 PM
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.
The above is the detailed content of How to install mysql in centos7. For more information, please follow other related articles on the PHP Chinese website!
Hot AI Tools
Undress AI Tool
Undress images for free
Undresser.AI Undress
AI-powered app for creating realistic nude photos
AI Clothes Remover
Online AI tool for removing clothes from photos.
Clothoff.io
AI clothes remover
Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!
Hot Article
Hot Tools
Notepad++7.3.1
Easy-to-use and free code editor
SublimeText3 Chinese version
Chinese version, very easy to use
Zend Studio 13.0.1
Powerful PHP integrated development environment
Dreamweaver CS6
Visual web development tools
SublimeText3 Mac version
God-level code editing software (SublimeText3)
Hot Topics
How to withdraw coins on the ok exchange? Detailed tutorial on withdrawing coins on ok exchange
Jul 03, 2025 pm 02:03 PM
?In today's increasingly popular digital asset trading, it is particularly important to understand how to safely and effectively withdraw your digital assets. As a world-renowned digital asset trading platform, ok exchange provides convenient currency withdrawal services. This tutorial will analyze in detail the steps of withdrawing coins on the ok exchange, things to note, and some common questions and answers to help users complete asset transfer smoothly and ensure asset security. Whether you are using ok exchange for withdrawals for the first time or want to further understand the withdrawal process, this article will provide you with clear and practical guidance.
Handling NULL Values in MySQL Columns and Queries
Jul 05, 2025 am 02:46 AM
When handling NULL values ??in MySQL, please note: 1. When designing the table, the key fields are set to NOTNULL, and optional fields are allowed NULL; 2. ISNULL or ISNOTNULL must be used with = or !=; 3. IFNULL or COALESCE functions can be used to replace the display default values; 4. Be cautious when using NULL values ??directly when inserting or updating, and pay attention to the data source and ORM framework processing methods. NULL represents an unknown value and does not equal any value, including itself. Therefore, be careful when querying, counting, and connecting tables to avoid missing data or logical errors. Rational use of functions and constraints can effectively reduce interference caused by NULL.
Analyzing the MySQL Slow Query Log to Find Performance Bottlenecks
Jul 04, 2025 am 02:46 AM
Turn on MySQL slow query logs and analyze locationable performance issues. 1. Edit the configuration file or dynamically set slow_query_log and long_query_time; 2. The log contains key fields such as Query_time, Lock_time, Rows_examined to assist in judging efficiency bottlenecks; 3. Use mysqldumpslow or pt-query-digest tools to efficiently analyze logs; 4. Optimization suggestions include adding indexes, avoiding SELECT*, splitting complex queries, etc. For example, adding an index to user_id can significantly reduce the number of scanned rows and improve query efficiency.
Kane Brown's first romantic comedy movie: From the country stage to the screen!
Jul 04, 2025 pm 08:48 PM
Country music icon Kane Brown is about to make his film debut in the romantic comedy The Token Groomsman, joining forces with Taylor Lautner for a great show. Get ready for a screen feast with laughter and tears! From a country singer to a new face on the screen, Kane Brown opens a new chapter! Dear fans, hurry up and calm your cowboy hats! The popular country music superstar Kane Brown will leave the stage temporarily and instead enter the big screen. He will debut as the feature-length feature film in the upcoming romantic comedy "The Best Guy" - not a guest appearance, but a bold attempt to devote himself to the actor's identity! From Nashville, destination
Performing logical backups using mysqldump in MySQL
Jul 06, 2025 am 02:55 AM
mysqldump is a common tool for performing logical backups of MySQL databases. It generates SQL files containing CREATE and INSERT statements to rebuild the database. 1. It does not back up the original file, but converts the database structure and content into portable SQL commands; 2. It is suitable for small databases or selective recovery, and is not suitable for fast recovery of TB-level data; 3. Common options include --single-transaction, --databases, --all-databases, --routines, etc.; 4. Use mysql command to import during recovery, and can turn off foreign key checks to improve speed; 5. It is recommended to test backup regularly, use compression, and automatic adjustment.
Establishing secure remote connections to a MySQL server
Jul 04, 2025 am 01:44 AM
TosecurelyconnecttoaremoteMySQLserver,useSSHtunneling,configureMySQLforremoteaccess,setfirewallrules,andconsiderSSLencryption.First,establishanSSHtunnelwithssh-L3307:localhost:3306user@remote-server-Nandconnectviamysql-h127.0.0.1-P3307.Second,editMyS
Paginating Results with LIMIT and OFFSET in MySQL
Jul 05, 2025 am 02:41 AM
MySQL paging is commonly implemented using LIMIT and OFFSET, but its performance is poor under large data volume. 1. LIMIT controls the number of each page, OFFSET controls the starting position, and the syntax is LIMITNOFFSETM; 2. Performance problems are caused by excessive records and discarding OFFSET scans, resulting in low efficiency; 3. Optimization suggestions include using cursor paging, index acceleration, and lazy loading; 4. Cursor paging locates the starting point of the next page through the unique value of the last record of the previous page, avoiding OFFSET, which is suitable for "next page" operation, and is not suitable for random jumps.
Managing Transactions and Locking Behavior in MySQL
Jul 04, 2025 am 02:24 AM
MySQL transactions and lock mechanisms are key to concurrent control and performance tuning. 1. When using transactions, be sure to explicitly turn on and keep the transactions short to avoid resource occupation and undolog bloating due to long transactions; 2. Locking operations include shared locks and exclusive locks, SELECT...FORUPDATE plus X locks, SELECT...LOCKINSHAREMODE plus S locks, write operations automatically locks, and indexes should be used to reduce the lock granularity; 3. The isolation level is repetitively readable by default, suitable for most scenarios, and modifications should be cautious; 4. Deadlock inspection can analyze the details of the latest deadlock through the SHOWENGINEINNODBSTATUS command, and the optimization methods include unified execution order, increase indexes, and introduce queue systems.
