Manual: savelog

SAVELOG(8)					   System Manager's Manual					  SAVELOG(8)

NAME
       savelog - save a log file

SYNOPSIS
       savelog	[-m  mode]  [-u	 user] [-g group] [-t] [-p] [-c cycle] [-l] [-j] [-J] [-1 .. -9] [-C] [-d] [-l] [-r rolldir]
       [-n] [-q] [-D dateformat] file ...

DESCRIPTION
       The savelog command saves and optionally compresses old copies of files.	 Older versions of file are named:

	      file.

       where  is the version number, 0 being the newest.  Version numbers > 0 are compressed unless -l prevents	 it.
       Version	number	0  is not compressed because a process might still have file opened for I/O.  Only cycle versions of
       the file are kept.

       If the file does not exist and -t was given, it will be created.

       For files that do exist and have lengths greater than zero, the following actions are performed:

       1)     Version numbered files are cycled.  Version file.2 is moved to version file.3, version file.1 is moved to ver‐
	      sion file.2, and so on.  Finally version file.0 is moved to version file.1, and version file is deleted.	Both
	      compressed names and uncompressed names are cycled, regardless of -l.  Missing version files are ignored.

       2)     The new file.1 is compressed unless the -l flag was given.  It is changed subject to the -m, -u, and -g flags.

       3)     The main file is moved to file.0.

       4)     If the -m, -u, -g,  -t, or -p flags are given, then an empty file is created subject to the given flags.	With
	      the -p flag, the file is created with the same owner, group, and permissions as before.

       5)     The new file.0 is changed subject to the -m, -u, and -g flags.

OPTIONS
       -m mode
	      chmod the log files to mode, implies -t

       -u user
	      chown log files to user, implies -t

       -g group
	      chgrp log files to group, implies -t

       -c cycle
	      Save cycle versions of the logfile (default: 7).	The cycle count must be at least 2.

       -t     touch new logfile into existence

       -l     don't compress any log files (default: do compress)

       -p     preserve owner, group, and permissions of logfile

       -j     compress with bzip2 instead of gzip

       -J     compress with xz instead of gzip

	      For xz no strength option is set, and xz decides on the default based on the total  amount  of  physical	RAM.
	      Note that xz can use a very large amount of memory for the higher compression levels.

       -1 .. -9
	      compression strength or memory usage (default: 9, except for xz)

       -C     force cleanup of cycled logfiles

       -d     use standard date for rolling

       -D dateformat
	      override date format, in the syntax understood by the date(1) command

       -r     use rolldir instead of . to roll files

       -n     do not rotate empty files

       -q     be quiet

BUGS
       If a process is still writing to file.0, and savelog moves it to file.1 and compresses it, data could be lost.

SEE ALSO
       logrotate(8)

Debian							 30 Dec 2017						  SAVELOG(8)