Design Notes

Server operation and maintenance

What should I do if the SSH connection in Linux is always disconnected after a period of time?

Previously, the Centos server did not have this problem. Recently, when switching to Debian 9, the SSH connection was always disconnected and reconnected after a period of time, but it did not affect the work, so I didn't care. However, it takes a long time to install PHP today

11 hours ago four hundred and fifteen comment

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Server operation and maintenance

How to find all host names, MAC addresses and IPs in the LAN

In order to test, I have been using a Windows computer through a remote desktop connection, but today I suddenly couldn't connect. I thought there was something wrong with this Windows computer. I connected it to the screen and looked at it. There was no problem at all. So guess is the network problem

May 31 1,438 comment

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Server operation and maintenance

Debian cannot install software using apt, and the connection failure problem is solved

Recently, I bought a new Debian server, ready to run and play by myself. However, when using apt to install the software, you will always be prompted with connection failure, 404 and other errors, that is, you cannot connect to the network (forget the screenshot, which will not be shown here). I went to the official image warehouse and found that

May 31 1,217 comment

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computer software

All shortcut keys of Photoshop cannot be used. The default shortcut key is lost. Solution

If problems occur, solve them. The newly installed Photoshop shortcut keys are no longer available. I thought the default shortcut keys had been changed? But when I tried to save the file by Ctrl+S, it was found that it could not be used. I realized that Photoshop is all the shortcut keys

May 28 2,321 comment

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computer software

Solve the Photoshop verification pop-up! Use Adobe Internet URL to block list

Recently, Adobe Photoshop on Mac always pops up, reminding me that the certificate is unavailable and needs to be re subscribed. After searching the Internet for a while, there was no good way. I was so angry that I tried to use the alternative software GIMP. However, the idea of this thing is simple, many

May 28 1,962 comment

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Server operation and maintenance

How to monitor and automatically restart processes through the supervisor

This article comes from my notepad. I sorted it out and found it useful. Introduction Supervisor is a process management tool that allows you to monitor and control long running processes. Supervisor can ensure that your process automatically restarts when it fails

May 16 4,642 comment

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Personal Notes

How to make ico icon files with multiple sizes

Today, I talked about pictures with my colleague. He told me that pictures in ico format can contain many different size photo files. I didn't believe him until he opened the picture viewing software and showed me the real files... After understanding, I knew that ico icon format is a kind of image file that contains multiple size bits

May 16 15,035 comment

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Server

In PHP, how to implement a mutex to avoid cache invalidation (breakdown) caused by a large number of simultaneous requests to query the same data

Many technologies can only be understood after being used. I heard three cases of cache invalidation before, cache avalanche, cache penetration, and cache breakdown are difficult to understand, because there were really fewer caches used at that time, and there were not so many problems, so I could not understand these theories. The cache has been used for some time recently

May 14 5,265 one

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Talk about something interesting

The new version of GPT-4o has been released for free

The following content has been translated from the latest flagship model GPT-4o on the official website. Now you can enjoy more free functions of ChatGPT. In order to implement our mission, we focus on advancing AI technology and ensuring that it is accessible and beneficial to all. Today, we introduce

May 14 5,588 comment

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Server operation and maintenance

Explain how to use the htop command to monitor system processes and resource usage

This article details how to use the htop command in Linux. If you find this command unavailable, you can install htop first. Introduction: htop is a more beautiful, colorful and slightly updated version of the top command. In top, some indicators such as "..."

May 11 6,763 comment

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