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Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Logs are emitted by network devices, operating systems, applications and all manner of intelligent or programmable device. A stream of messages in time-sequence often comprise a log. Logs may be directed to files, stored on disk, or directed as a network stream, directed to a log collector. Log messages must usually be interpreted with respect to the internal state of its source and announce security-relevant or operations-relevant events. Logs are often created by…mehr

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Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Logs are emitted by network devices, operating systems, applications and all manner of intelligent or programmable device. A stream of messages in time-sequence often comprise a log. Logs may be directed to files, stored on disk, or directed as a network stream, directed to a log collector. Log messages must usually be interpreted with respect to the internal state of its source and announce security-relevant or operations-relevant events. Logs are often created by the software developers to aid in the debugging of the operation of the application. The syntax and semantics of data within log messages are usually application or vendor-specific. The authentication of a user to an application may be described as a login, a logon, a user connection or authentication event. Hence, log analysis must interpret messages within the context of an application, vendor, system or configuration in order to make useful comparisons to messages from different log sources.