Logfile

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In computing, a logfile (or log file, or simply log) is a computer file which contains a record of events and messages, typically with the time and date of each event or message.

Description

A logfile is a file that records either events that occur in an operating system or other software runs, or messages between different users of a communication software.

Logging is the act of keeping a log.

In the simplest case, messages are written to a single logfile.

A transaction log is a file (i.e., log) of the communications (i.e., transactions) between a system and the users of that system, or a data collection method that automatically captures the type, content, or time of transactions made by a person from a terminal with that system.

For Web searching, a transaction log is an electronic record of interactions that have occurred during a searching episode between a Web search engine and users searching for information on that Web search engine.

Many operating systems, software frameworks, and programs include a logging system. A widely used logging standard is syslog, defined in Internet Engineering Task Force (IETF) RFC 5424).

The syslog standard enables a dedicated, standardized subsystem to generate, filter, record, and analyze log messages. This relieves software developers of having to design and code their own ad hoc logging systems.

See also

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