savelog - save a log file
savelog [-m mode] [-u user] [-g group] [-t] [-p] [-c cycle] [-l] 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 becase 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 cycle-2 is moved to
version cycle-1, version cycle-3 is moved to version cycle-2 ,
and so on. Finally version 0 is moved to version 1, and version
cycle 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 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
5) The new file.0 is changed subject to the -m, -u, and -g flags.
Since the version numbers start with 0, version number cycle is
never formed. The cycle count must be at least 2.
chmod the log files to mode
chown log files to user
chgrp log files to group
Save cycle versions of the logfile (default: 7)
-t touch new logfile into existence
-l don't compress any log files (default: do compress)
-p preserve owner, group, and permissions of logfile
If a process is still writing to file.0, and savelog moves it to file.1
and compresses it, data could be lost.
Debian GNU/Linux 24 August 1997 SAVELOG(8)
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