ROTATELOGS(8) rotatelogs ROTATELOGS(8)
rotatelogs - Piped logging program to rotate Apache logs
rotatelogs [ -l ] logfile [ rotationtime [ offset ]] | [ filesizeM ]
rotatelogs is a simple program for use in conjunction with Apaches
piped logfile feature. For example:
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
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.
-l Causes the use of local time rather than GMT as the base for the
interval. Note that using -l in an environment which changes the
GMT offset (such as for BST or DST) can lead to unpredictable
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.
The time between log file rotations in seconds.
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.
The maximum file size in megabytes followed by the letter M to
specify size rather than time. Use this parameter in place of
both rotationtime and offset.
The following logfile format string substitutions should be supported
by all strftime(3) implementations, see the strftime(3) man page for
%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 2004-06-20 ROTATELOGS(8)