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What are web server log files and how to use them for troubleshooting hosting issues?

Answer

Web server log files are text documents that automatically record all requests to a site and system events. There are two main types of logs: the access log, which records information about each visitor, and the error log, which records malfunctions in the code or server configuration.

Log analysis is a basic skill for web developers and system administrators when troubleshooting. If a site returns a 500 error or suddenly stops displaying, searching for the cause should begin precisely with reading the error log.

Most hosting control panels provide a convenient interface for viewing logs in real time. They can also be accessed via the SSH protocol using standard text editors or console commands for data filtering.

For effective work with logs, it is recommended to perform the following actions:

•Regularly check the error file for recurring critical entries related to lack of memory or syntax errors in scripts.
•Use filtering utilities to search for specific IP addresses or pages causing load on the server.
•Configure automatic log rotation on hosting so they do not occupy all available disk space.
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