What information can be contained in log files?

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Depending on the server type and settings, log files may contain different information. Typically, they contain the following data:

IP addresses are the identifiers of the computers from which the actions we are interested in were performed.
Date and time - when the event occurred.
Users - usernames, if any
Requests are types of operations, such as viewing a page, sending an email, or downloading a file.
Response codes are the status of the operation (for example, successful turkey whatsapp number database request or error).
Location - the country or city where the user is located
Devices - the type of device from which the request was made (computer, mobile phone, etc.).
Referrers are the source of the transition to the site (a link from another site, a search engine, etc.).
This data can be very useful for understanding user behavior and improving the performance of a site or server.

Types of logs
Services generate various log files, each of which contains information about its specific area of ​​operation.

Systemic
Contains records of major OS events - service startup and shutdown, errors, warnings, resource usage information, etc. They are located in the "/var/log" directory on Linux or in the "Event Viewer" on Windows.

Web server logs
They register all requests to the site - who, when and from what IP visited your resource, what pages were opened, how much time was spent on the site, etc.

Web server logs record information about requests to a site, such as:

URL of the requested page;
User IP address;
request method (GET, POST, PUT, DELETE);
response status (200 OK, 404 Not Found).
This data is necessary to analyze traffic and user behavior.