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Self-study IT network Linux load balancing video tutorial

Course Intermediate 11386

Course Introduction："Self-study IT Network Linux Load Balancing Video Tutorial" mainly implements Linux load balancing by performing script operations on web, lvs and Linux under nagin.

Shangxuetang MySQL video tutorial

Course Advanced 17699

Course Introduction："Shangxuetang MySQL Video Tutorial" introduces you to the process from installing to using the MySQL database, and introduces the specific operations of each link in detail.

Band of Brothers front-end example display video tutorial

Course Advanced 11397

Course Introduction："Brothers Band Front-end Example Display Video Tutorial" introduces examples of HTML5 and CSS3 technologies to everyone, so that everyone can become more proficient in using HTML5 and CSS3.

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Ways to fix issue 2003 (HY000): Unable to connect to MySQL server 'db_mysql:3306' (111)

I recently tried to containerize my FastAPIPython server (also for replication/doubling purposes). Before, I had just a MySQL server in a Docker container and everything was fine, but when I also made my web server a service, it couldn't connect to the MySQL server, so now the application doesn't work. Below is the code snippet of the server database initialization connector in the application fromfastapiimportFastAPIimportmysql.connectorapp

2023-09-05 11:18:47

Experiment with sorting after query limit

So this is my first question here, please forgive me if something is wrong. I'm trying to make a sort query based on constraints. So there is a Customers table with 90 records. I want to first perform a query limited to 3 records, and then sort the results of this query by a column called ContactName. I think this might be a nested query. Nested queries run fine in SQLServer, but don't know how to implement it in MySQL. Limit query: Select*fromcustomerslimit

2023-09-05 14:46:42

CSS Grid: Create new row when child content overflows column width

I have a two column layout based on CSS grid. When the content of the second column exceeds 1fr I want to create a new row. As it currently stands, the content simply overflows the column. One requirement of this layout is that the items in the right menu column are in one row. I achieve this with: .right-menu{...grid-auto-flow:columndense;...} If I remove the grid-auto-flow attribute, the overflow stops. However, the items are now stacked into multiple rows, which is not what I want. I also tried converting .ri

2023-09-05 15:18:28

PHP full text search functionality using AND, OR and NOT operators

Newbie question: I'm trying to implement a full text search on a search string using php and eloquent. $searchstring="+(victimsuspect)+crime-covid";$searchresult=RssItem::whereRaw("MATCH(description)AGAINST('$searchstring'INBOOLEANMODE)")->ge

2023-09-05 15:06:32

Shortest way to convert all PHP types to string

I'm writing a general system that I hope can one day be applied to fields like medicine (i.e. it's "scientific"). I think the best way is to represent all the data in php with strings (true will be "true", false will be "false" and so on). The reason for this is that in php any value has a unique string representation (such as the php code itself). I post this question to speed up the design process of this program. Some values are easily converted to strings: numbers, booleans, etc. Some are not easy: objects, arrays, resources. I think the transfer object and

2023-09-05 15:34:44

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Apple iPhone 16 Pro Max revealed in four colors, new bronze color available

Course Introduction：Thanks to netizen Wu Yanzu from South China for submitting the clue! According to news on August 17, source Sonny Dickson posted a tweet on the X platform yesterday (August 16) and shared photos of the Apple iPhone 16 Pro Max model. The most noteworthy one is the new bronze color. Check Apple China's official website. Apple iPhone15ProMax has the following 4 colors: original color titanium blue titanium white titanium black titanium (more towards dark gray). In the iPhone16ProMax model photos exposed this time, there are the following 4 colors: white Titanium metal Black titanium metal (it looks more black, it cannot be ruled out that it is due to the light) Original color titanium metal Bronze titanium metal Judging from the exposed model photos, Apple’s i this year

2024-08-17 comment 0 672

Launched in July this year, HMD warms up its own brand smartphones

Course Introduction：Thanks to netizen Wu Yanzu from South China for submitting the clue! According to news on February 28, Finnish company HMD will launch its own brand smartphone in July this year. The company recently released the first official warm-up images of the new phone. Both phones will have a focus on sustainability and will be particularly easy to replace with screens. HMD said one of their goals for 2024 is to increase their product portfolio of repairable devices. Note that apart from the prominent HMD logo, the trailer does not reveal much information. It is only confirmed that the phone will be available in black and pink colors. The pink version has a satin finish and offers a slight glimpse of its camera module. HMD has not yet announced any specifications of the new phone, but the Nokiamob website speculates that one of the phones may be named Fusion or Legen

2024-02-29 comment 0 1095

What era is the mobile phone of Big Brother?

Course Introduction：Big Brother is the mobile phone of the seventies. Mobile phone was first invented by engineers from Motorola in the United States in 1973. It is a common name for mobile phones. Mobile phone uses an analog communication network. Analog signals are prone to interference, so the call quality is not clear and stable enough. Sometimes you need to shout when talking on the phone. The Big Brother is thick and bulky, shaped like a black brick, and weighs more than a kilogram. Although the battery is large, it can only last for 30 minutes of calls after charging.

2022-10-27 comment 0 23533

New title: Nikon is about to release a full-frame retro camera, and its appearance has been revealed, raising expectations

Course Introduction：Nikon is about to release its highly anticipated full-frame retro camera, which is expected to be officially launched in August or September. Recently, more and more news and evidence have confirmed the authenticity of this camera, further stimulating the interest of photography enthusiasts. According to reports on the NikonRumors website, the company's new Zf camera is said to have been exposed. It can be clearly seen from the leaked videos and photos that this camera is inlaid with the iconic "Zf" word, and the overall design resembles the style of a classic film camera, giving users a strong retro visual experience. According to the news To summarize, this camera uses an all-black body and is equipped with a 24-megapixel BSI-CMOS sensor to provide users with high-quality image capture capabilities. The camera itself weighs about 700 grams

2023-08-22 comment 0 1030

How to install win7 operating system on computer

Course Introduction：Among computer operating systems, WIN7 system is a very classic computer operating system, so how to install win7 system? The editor below will introduce in detail how to install the win7 system on your computer. 1. First download the Xiaoyu system and reinstall the system software on your desktop computer. 2. Select the win7 system and click "Install this system". 3. Then start downloading the image of the win7 system. 4. After downloading, deploy the environment, and then click Restart Now after completion. 5. After restarting the computer, the Windows Manager page will appear. We choose the second one. 6. Return to the computer pe interface to continue the installation. 7. After completion, restart the computer. 8. Finally come to the desktop and the system installation is completed. One-click installation of win7 system

2023-07-16 comment 0 1240

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