In Linux, 500 error refers to "500 Internal Server Error", which means 500 internal server error, indicating that there is a problem with the network server hosting the website being accessed; HTTP status code 500 is a general error response. The server returns this error response when no other error code is suitable, possibly due to any number of issues that prevent the server from completing the request.
#The operating environment of this tutorial: linux7.3 system, Dell G3 computer.
What is 500 error in linux
500 Internal Server Error (500 Internal Server Error) is a general HTTP status code that indicates that something is wrong with the web server hosting the website you are visiting.
One of the most common errors that sometimes occurs while browsing the web is seeing "500 Internal Server Error". This message indicates that the web server is experiencing technical problems. This article explains what 500 errors mean, what causes HTTP 500 codes, and how to resolve these errors.
What is HTTP 500 Error
Every time you open a web page, the browser will send a request to the server hosting the site, and the server will return the requested data and response code, The HTTP response status code indicates whether the request was successful.
Responses are divided into five categories, and codes in the range of 500 to 599 indicate server errors. First of all, it should be stated that this has nothing to do with what operating system you are accessing under. That is, it is wrong to access under Linux system, and it is still wrong under Windows.
HTTP status code 500 is a generic error response that the server will return when no other error code is suitable, possibly due to a number of issues that prevent the server from completing the request.
If your website prompts a 500 error, and the error is not caused by your browser or Internet connection, the error occurs on the website side, you can also try some of the following Options:
1. Reload the browser or try to use another browser. Refreshing the browser and reloading the page are less likely to solve the problem, but it is still worth trying.
2. Try clearing the browser cache. If the page showing the 500 error is cached, the browser will request a new version of the page after clearing the cache.
3. Try to handle site errors in the following ways. The last remaining option is to contact the person responsible for maintaining the website.
Troubleshooting 500 Error
A variety of different reasons may cause 500 Internal Server Error. This is the most common:
1. Permission issues , when the web server does not have permission to access the site files, it may cause an HTTP 500 error. The way to solve this problem is to recursively change the permissions of the website files.
2. .htaccess syntax error. If you use Apache as a web server, there is likely to be a .htaccess file in the root directory of the site. Invalid syntax or non-existent module directives may cause a 500 error.
3. Database-related issues, HTTP error 500 may also be caused by incorrect database server information or a damaged database.
4. Plug-in and theme issues. If you are running WordPress or a similar CMS, a 500 error may occur after updating or modifying the plug-in/theme.
5. Server problems, file system damage or memory exhaustion may cause 500 errors.
6. Node.js module. If you have a Node.js-based site, updating the module may cause 500 internal server errors.
7. Hacked website. Usually, malicious code injected into your website will cause a 500 error.
8. Incompatible modules. Loading incompatible PHP or Apache modules will cause a 500 error.
9. External resource timeout, if the server communicates with external services and if these services cannot be accessed, the server will display a 500 error message.
The best way to determine why a 500 error occurred is to check the server log file. The location of the log file depends on your Linux distribution and web server. The most common locations for Apache and Nginx are as follows:
/var/log/apache2/error.log
/var/log/httpd/error_log
/var/log/nginx/error_log
If your application is built on Node.js, please check the Node.js logs.
Typically, server logs contain detailed information about errors to help you identify and fix them.
Conclusion
500 Internal Server Error (500 Internal Server Error) is a general HTTP status code that means something is wrong with the web server hosting the website you are visiting. If you are a website administrator, please troubleshoot as described above and handle it accordingly.
Recommended learning: Linux video tutorial
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