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Linux 2.6 - man page for rotatelogs (linux section 8)

ROTATELOGS(8)				    rotatelogs				    ROTATELOGS(8)

       rotatelogs - Piped logging program to rotate Apache logs

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

       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.

       -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 environ-
	      ment which changes the GMT offset (such as for BST  or  DST)  can  lead  to  unpre-
	      dictable results!

       -f     Causes  the logfile to be opened immediately, as soon as rotatelogs 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


	      The time between log file rotations in seconds. The rotation occurs at  the  begin-
	      ning 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.)

	      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 off-

	    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 multiple 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 mid-
       night, 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-

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

       o %A - full weekday name (localized)

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

       o %B - full month name (localized)

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

       o %c - date and time (localized)

       o %d - 2-digit day of month

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

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

       o %j - 3-digit day of year

       o %M - 2-digit minute

       o %m - 2-digit month

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

       o %S - 2-digit second

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

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

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

       o %X - time (localized)

       o %x - date (localized)

       o %Y - 4-digit year

       o %y - 2-digit year

       o %Z - time zone name

       o %% - literal `%'

Apache HTTP Server			    2010-11-06				    ROTATELOGS(8)

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