code show as below: #Install yum-config-manager yum install yum-utils-y # Disable the source of MySQL5.6 yum-config-manager --disable mysql56-community # Enable the source of MySQL5.7 yum-config-manager --enable mysql57-community-dmr # Use the following command to check whether the configuration is correct yum repolist enabled | grep mysql code show as below: # mysqld --initialize --user=mysql --datadir=/var/lib/mysql or code show as below: # mysqld --initialize-insecure --user=mysql --datadir=/var/lib/mysql In addition, when you use mys
1. How to install the MySQL5.7 database using MySQL's yum source_MySQL
Introduction: This article mainly introduces the relevant information on how to install the MySQL5.7 database using MySQL's yum source. Friends in need can refer to
2. yum source Unable to find php54w
Introduction: rpm -Uvh http://repo.webtatic.com/yum/... Mine is php5.4, centos6.7, But after updating the yum source, I still cannot find php54w-devel. Where is the available yum source? Or do you need to yum install php54w after downloading the yum source, and then execute php54w-devel?...
3. linux - php54w cannot be found in the yum source- devel, please use yum source
Introduction: rpm -Uvh http://repo.webtatic.com/yum/... Mine is php5.4, centos6. 7. However, after updating the yum source, php54w-devel still cannot be found. Where is the available yum source? Or do you need to yum install php54w after downloading the yum source, and then execute php54w-devel?
4. linux - After installing php5.5 using Webtatic's yum source Can no longer install phpize and pecl
Introduction: I installed php5.5 using the method at http://www.blogjava.net/nkjav..., but then When trying to install phpize, the following error occurs. How to solve it? This problem has troubled me for a long time, and I still don’t know how to solve it. The default yum source is now 5.3, but my project is a yii2.0 box...
Introduction:: This article mainly introduces the Linux system CentOS uses the yum method to install the specified version of PHP. Add the yum source to upgrade from PHP53 to 54/55/56. Students who are interested in PHP tutorials can refer to it.
##Introduction::This article mainly introduces the nginx’s yum source. Students who are interested in PHP tutorials can refer to it.
7. Linux PHP53 upgrade PHP5533 linux php upgrade 5.5 php5.2 for linux linux libphp5.s
Introduction : Linux, php5: Linux PHP53 upgrade PHP5533: Since laravel5.1 is used, php needs to be upgraded to 5.5 or above. The specific environment is Aliyun Cent OS 7.0. Since Alibaba's yum source lastest is only 5.4, laravel5.1 requires php5.5, and several online yum sources have been added, which caused various problems, so I can only compile and install it troublesomely. First of all, there are many such articles on the Internet. Everyone's purpose of upgrading and the components to be upgraded are not exactly the same. The best documentation is the official installation document. If the installation of the PHP official website fails, search for related issues
8. Build an nginx reverse proxy server under CentOS7 to enable the external network Intranet applications centos7.2 centos 7.0 centos 6.7
can be accessed by the second-level domain name. Introduction: centos7: Build an nginx reverse proxy server under CentOS7 so that the external network can access the second-level domain name. Intranet application: Create local yum source of nginx [root@localhost ~]# yum list |grep nginx No package nginx available. [root@localhost ~]# //What the hell, why is there no nginx rpm? Forget it, just manually configure an official website repo yourself [root@localhost ~]# //Visit the nginx official website, enter the dowload page, and turn to the Pre-
9 at the bottom. Svn server installation and configuration to build Svn server
Introduction: svn server setup: svn server setup Svn server installation and configuration: 1. Install svn server software Download and install SVN server software from the mirror server or YUM source: yum install subversion mkdir /usr/local/ svn //Create the SVN installation directory chmod -R 777 svn //Modify the directory permissions to 777svnadmin create /usr/local/svn/sunny //Create an SVN version warehouse sunny (sunny can be customized
10. Linux PHP5.3 upgrade to PHP5.5.33, php5.3php5.5.33_PHP tutorial
##Introduction: Linux PHP5.3 upgrades to PHP5.5.33, php5.3php5.5.33. Linux PHP5.3 upgrades to PHP5.5.33, php5.3php5.5.33. Due to the use of laravel5.1, php needs to be upgraded to 5.5 or above. The environment is Aliyun Cent OS 7.0. Since Ali's yum source lastest is only 5.4,
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linux - Some problems with yum sources
##linux - How to add missing sources to the local yum source image?Job for docker.service failed. Problem appears when installing Docker.Can the php-mysql package and PDO work normally after installing mariadb in centos7?The above is the detailed content of 10 recommended articles about yum sources. For more information, please follow other related articles on the PHP Chinese website!
Explain the ACID properties (Atomicity, Consistency, Isolation, Durability).Apr 16, 2025 am 12:20 AMACID attributes include atomicity, consistency, isolation and durability, and are the cornerstone of database design. 1. Atomicity ensures that the transaction is either completely successful or completely failed. 2. Consistency ensures that the database remains consistent before and after a transaction. 3. Isolation ensures that transactions do not interfere with each other. 4. Persistence ensures that data is permanently saved after transaction submission.
MySQL: Database Management System vs. Programming LanguageApr 16, 2025 am 12:19 AMMySQL is not only a database management system (DBMS) but also closely related to programming languages. 1) As a DBMS, MySQL is used to store, organize and retrieve data, and optimizing indexes can improve query performance. 2) Combining SQL with programming languages, embedded in Python, using ORM tools such as SQLAlchemy can simplify operations. 3) Performance optimization includes indexing, querying, caching, library and table division and transaction management.
MySQL: Managing Data with SQL CommandsApr 16, 2025 am 12:19 AMMySQL uses SQL commands to manage data. 1. Basic commands include SELECT, INSERT, UPDATE and DELETE. 2. Advanced usage involves JOIN, subquery and aggregate functions. 3. Common errors include syntax, logic and performance issues. 4. Optimization tips include using indexes, avoiding SELECT* and using LIMIT.
MySQL's Purpose: Storing and Managing Data EffectivelyApr 16, 2025 am 12:16 AMMySQL is an efficient relational database management system suitable for storing and managing data. Its advantages include high-performance queries, flexible transaction processing and rich data types. In practical applications, MySQL is often used in e-commerce platforms, social networks and content management systems, but attention should be paid to performance optimization, data security and scalability.
SQL and MySQL: Understanding the RelationshipApr 16, 2025 am 12:14 AMThe relationship between SQL and MySQL is the relationship between standard languages and specific implementations. 1.SQL is a standard language used to manage and operate relational databases, allowing data addition, deletion, modification and query. 2.MySQL is a specific database management system that uses SQL as its operating language and provides efficient data storage and management.
Explain the role of InnoDB redo logs and undo logs.Apr 15, 2025 am 12:16 AMInnoDB uses redologs and undologs to ensure data consistency and reliability. 1.redologs record data page modification to ensure crash recovery and transaction persistence. 2.undologs records the original data value and supports transaction rollback and MVCC.
What are the key metrics to look for in an EXPLAIN output (type, key, rows, Extra)?Apr 15, 2025 am 12:15 AMKey metrics for EXPLAIN commands include type, key, rows, and Extra. 1) The type reflects the access type of the query. The higher the value, the higher the efficiency, such as const is better than ALL. 2) The key displays the index used, and NULL indicates no index. 3) rows estimates the number of scanned rows, affecting query performance. 4) Extra provides additional information, such as Usingfilesort prompts that it needs to be optimized.
What is the Using temporary status in EXPLAIN and how to avoid it?Apr 15, 2025 am 12:14 AMUsingtemporary indicates that the need to create temporary tables in MySQL queries, which are commonly found in ORDERBY using DISTINCT, GROUPBY, or non-indexed columns. You can avoid the occurrence of indexes and rewrite queries and improve query performance. Specifically, when Usingtemporary appears in EXPLAIN output, it means that MySQL needs to create temporary tables to handle queries. This usually occurs when: 1) deduplication or grouping when using DISTINCT or GROUPBY; 2) sort when ORDERBY contains non-index columns; 3) use complex subquery or join operations. Optimization methods include: 1) ORDERBY and GROUPB
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DVWA
Damn Vulnerable Web App (DVWA) is a PHP/MySQL web application that is very vulnerable. Its main goals are to be an aid for security professionals to test their skills and tools in a legal environment, to help web developers better understand the process of securing web applications, and to help teachers/students teach/learn in a classroom environment Web application security. The goal of DVWA is to practice some of the most common web vulnerabilities through a simple and straightforward interface, with varying degrees of difficulty. Please note that this software
mPDF
mPDF is a PHP library that can generate PDF files from UTF-8 encoded HTML. The original author, Ian Back, wrote mPDF to output PDF files "on the fly" from his website and handle different languages. It is slower than original scripts like HTML2FPDF and produces larger files when using Unicode fonts, but supports CSS styles etc. and has a lot of enhancements. Supports almost all languages, including RTL (Arabic and Hebrew) and CJK (Chinese, Japanese and Korean). Supports nested block-level elements (such as P, DIV),
