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Solution to the emergence of-bash: sudo: command not found in Debian systemmethod

I believe many students have encountered problems like-bash: sudo: command not found when executing commands after installing a new server. The following is a tutorial. The following actions can be solved. First of all, let's make sure and execute the following command to see if the file exists.

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2025-02-14

CentOS 7 will end official support and updates on June 30, 2024

Official CentOS 7 support and updates end on June 30, 2024. If you are using CentOS 7 and want to continue receiving security updates and other fixes, there are several options you can choose from: Migrate to a new distribution: Consider migrating to CentOS 8,

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2024-06-06

Discuz! X3.5 How to get real IP in the forum after using cdn

Tips before viewing: Modifying Discuz is not the best way to obtain the real IP. If you have the ability, it is recommended to understand the configuration of Apache mod_remoteip, Nginx ngx_http_realip_module or other similar functions on the server side

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2024-05-27

Resolution of abnormal access to pagoda panels by domestic Cloud Virtual Machine and overseas regionsmethod

Most of the symptoms are that users are slow to load the software store when accessing the Baota Panel, cannot open it or cannot bind the account; or an error is reported directly when logging in to the home page of the Panel [An error occurred while the Panel was running: an error occurred in parsing the software list, and an attempt has been made to repair it automatically. Please refresh the page and try again!] Users of Cloud Virtual Machine in China and Hong Kong can

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2023-05-06

Discuz forum appeared: Sorry, your IP address is not within the allowed range, or your account is disabled and you cannot access this site.

The solution is-check the permissions of the basic settings of the user group. Please re-check all permissions of the relevant user group. The system will classify all permissions of the relevant group to tourists or groups that are prohibited from browsing. Groups with authority on forums such as super moderators and moderators directly check the basic settings

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2022-08-29

Error 524: a timeout occurred in Cloudflare and resolutionmethod

A 524 error occurred in Cloudflare acceleration, indicating that Cloudflare successfully connected to the origin server, but the origin site Web server did not provide an HTTP response before the default 100-second connection timeout ended (Enterprise customers can extend the 524 timeout to

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2022-06-16

Resolution of abnormal access to bt Baota panels on Cloud Virtual Machine in Shanghai and Hong Kongmethod

Recently, there is an abnormality in the connection of Shanghai computer room to Guangdong Telecom or other nodes of our company in Guangdong. Most of the symptoms are that users are slow to load the software store when accessing the Baota Panel, cannot open it or cannot bind the account; or an error is reported directly when logging in to the front page of the Panel [An error occurred while the Panel was running: an error occurred in parsing the software list, and an automatic repair has been attempted.

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2022-04-01

Ali Cloud Virtual Machine uses Baidu Cloud to accelerate the emergence of origin server 502

Many customers report that when using Baidu Cloud Acceleration, the website will encounter a 502 error. After testing, the solution is as follows: Put the Baidu Cloud IP segment into the Baota Firewall whitelist, where the Baidu Cloud IP segment can be found: Open the Baota Firewall, find the whitelist ip, import the Baidu Cloud Acceleration node map i

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2022-03-15

Discuz Forum SEO settings cannot be savedmethod

Some users reported that after submitting seo settings in the background, there was no prompt for saving successfully. After inspection, it was found that it was a problem with the environment php. The processing results are as follows: Where the problem occurred: Open the background, global, SEO settings, any item under this menu has been modified. Refresh between submission pages, and no prompt will be given to save

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2021-07-26

SEO optimization website keyword selection skills

When doing website SEO, you can often see weird keywords appearing on some websites, and you may even wonder how this was done? What are the methods to choose keywords? The following editor shares for you how to select keywords for website SEO optimization! There are five main points to pay attention to when selecting keywords: 1. Don't choose students

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2018-11-08
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