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:
file.<number><compress_suffix>
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
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.
Since the version numbers start with 0, version number cycle is
never formed. The cycle count must be at least 2.
-m mode
chmod the log files to mode
-u user
chown log files to user
-g group
chgrp log files to group
-c cycle
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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