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 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.
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.)
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.
CustomLog "|bin/rotatelogs /var/logs/logfile 86400" common
This creates the files /var/logs/logfile.nnnn where nnnn is the system
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.
The following logfile format string substitutions should be supported
by all strftime(3) implementations, see the strftime(3) man page for
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 %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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