SAVELOG(8)                (30 Dec 2017)                SAVELOG(8)

          savelog - save a log file

          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 ...

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


          where <number> 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 cre-

          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
               version 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

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

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

          4)   If the -m, -u, -g, 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


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     SAVELOG(8)                (30 Dec 2017)                SAVELOG(8)

          -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

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


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