Download Apache Cookbook by Rich Bowen, Ken Coar PDF

By Rich Bowen, Ken Coar

The Apache Cookbook is a suite of difficulties, suggestions, and useful examples for site owners, internet directors, programmers, and everybody else who works with Apache. rather than poking round mailing lists, on-line documentation, and different resources, you could depend upon the Apache Cookbook for speedy ideas to universal difficulties, after which you could spend some time and effort the place it issues so much.

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Rollovers will occur whenever the system time is a multiple of this value. For instance, a 24-hour day contains 86,400 seconds; if you specify a rollover interval of 86400, a new logfile will be created every night at midnight when the system time, which is based at representing midnight on 1 January 1970, is a multiple of 24 hours. Note that the rollover interval is in actual clock seconds elapsed, so when time changes because of daylight savings, this does not in any way affect the interval between rollovers.

Before long, as the HTTP protocol advanced, the common log format was found to be wanting, so an enhanced format, called the combined log format, was created: "%h %l %u %t \"%r\" %>s %b \"%{Referer}i\" \"%{User-agent}i\"" The two additions were the Referer (it's spelled incorrectly in the specifications) and the User-agent. These are the URL of the page that linked to the document being requested, and the name and version of the browser or other client software making the request. Both of these formats are widely used, and many logfile analysis tools assume log entries are made in one or the other.

Conf file. There are several possible arguments, which are enumerated below: For example: LogLevel Debug 42 43 Discussion There are several hierarchical levels of error logging available, each identified by its own keyword. The default value of LogLevel is warn. Listed in descending order of importance, the possible values are: emerg Emergencies; web server is unusable alert Action must be taken immediately crit Critical conditions error Error conditions warn Warning conditions notice Normal but significant condition info Informational debug Debug-level messages emerg results in the least information being recorded and debug in the most.

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