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ROTATELOGS(8)			  rotatelogs			 ROTATELOGS(8)

NAME
       rotatelogs - Piped logging program to rotate Apache logs

SYNOPSIS
       rotatelogs [ -l ] [ -f ] logfile rotationtime|filesizeM [ offset ]

SUMMARY
       rotatelogs  is  a  simple  program for use in conjunction with Apache's
       piped logfile feature. It supports rotation based on a time interval or
       maximum size of the log.

OPTIONS
       -l     Causes the use of local time rather than GMT as the base for the
	      interval or for strftime(3) formatting with size-based rotation.
	      Note  that using -l in an environment which changes the GMT off‐
	      set (such as for BST or DST) can lead to unpredictable results!

       -f     Causes the logfile to be opened immediately, as soon as rotatel‐
	      ogs starts, instead of waiting for the first logfile entry to be
	      read (for non-busy sites,	 there	may  be	 a  substantial	 delay
	      between when the server is started and when the first request is
	      handled, meaning that the associated logfile  does  not  "exist"
	      until  then,  which  causes problems from some automated logging
	      tools). Available in version 2.2.9 and later.

       logfile
	      The path plus basename of the logfile. If logfile	 includes  any
	      '%'  characters,	it  is	treated	 as  a format string for strf‐
	      time(3). Otherwise,  the	suffix	.nnnnnnnnnn  is	 automatically
	      added and is the time in seconds. Both formats compute the start
	      time from the beginning of the current period. For example, if a
	      rotation	time of 86400 is specified, the hour, minute, and sec‐
	      ond fields created from the strftime(3) format will all be zero,
	      referring	 to  the beginning of the current 24-hour period (mid‐
	      night).

       rotationtime
	      The time between log file rotations  in  seconds.	 The  rotation
	      occurs  at  the  beginning of this interval. For example, if the
	      rotation time is 3600, the log  file  will  be  rotated  at  the
	      beginning	 of every hour; if the rotation time is 86400, the log
	      file will be rotated every night at midnight.  (If  no  data  is
	      logged during an interval, no file will be created.)

       filesizeM
	      The  maximum  file size in megabytes followed by the letter M to
	      specify size rather than time.

       offset The number of minutes offset  from  UTC.	If  omitted,  zero  is
	      assumed  and  UTC is used. For example, to use local time in the
	      zone UTC -5 hours, specify a value of -300 for this argument. In
	      most cases, -l should be used instead of specifying an offset.

EXAMPLES
	    CustomLog "|bin/rotatelogs /var/logs/logfile 86400" common

       This  creates the files /var/logs/logfile.nnnn where nnnn is the system
       time at which the log nominally starts (this time will always be a mul‐
       tiple  of  the  rotation time, so you can synchronize cron scripts with
       it). At the end of each rotation time (here after 24 hours) a  new  log
       is started.

	    CustomLog "|bin/rotatelogs -l /var/logs/logfile.%Y.%m.%d 86400" common

       This  creates  the files /var/logs/logfile.yyyy.mm.dd where yyyy is the
       year, mm is the month, and dd is the day of  the	 month.	 Logging  will
       switch to a new file every day at midnight, local time.

	    CustomLog "|bin/rotatelogs /var/logs/logfile 5M" common

       This  configuration  will rotate the logfile whenever it reaches a size
       of 5 megabytes.

	    ErrorLog "|bin/rotatelogs /var/logs/errorlog.%Y-%m-%d-%H_%M_%S 5M"

       This configuration will rotate the error logfile whenever it reaches  a
       size of 5 megabytes, and the suffix to the logfile name will be created
       of the form errorlog.YYYY-mm-dd-HH_MM_SS.

PORTABILITY
       The following logfile format string substitutions should	 be  supported
       by  all	strftime(3)  implementations, see the strftime(3) man page for
       library-specific extensions.

       · %A - full weekday name (localized)

       · %a - 3-character weekday name (localized)

       · %B - full month name (localized)

       · %b - 3-character month name (localized)

       · %c - date and time (localized)

       · %d - 2-digit day of month

       · %H - 2-digit hour (24 hour clock)

       · %I - 2-digit hour (12 hour clock)

       · %j - 3-digit day of year

       · %M - 2-digit minute

       · %m - 2-digit month

       · %p - am/pm of 12 hour clock (localized)

       · %S - 2-digit second

       · %U - 2-digit week of year (Sunday first day of week)

       · %W - 2-digit week of year (Monday first day of week)

       · %w - 1-digit weekday (Sunday first day of week)

       · %X - time (localized)

       · %x - date (localized)

       · %Y - 4-digit year

       · %y - 2-digit year

       · %Z - time zone name

       · %% - literal `%'

Apache HTTP Server		  2008-05-10			 ROTATELOGS(8)
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