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 offset (such as for BST or DST) can lead to unpredictable 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 later.

       logfile
	      The path plus basename of the logfile. If logfile includes any '%' characters, it is treated as a  format  string  for  strftime(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 second fields  created
	      from the strftime(3) format will all be zero, referring to the beginning of the current 24-hour period (midnight).

       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
       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 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 cre-
       ated 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.

       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						    2008-05-10							     ROTATELOGS(8)