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UNIX for Dummies Questions & Answers
Script for reducing logs
Post 10199 by Kelam_Magnus on Friday 9th of November 2001 10:08:31 AM
11-09-2001
Hi,
This is fairly easy to accomplish.
You could use grep.
First copy your logfile to a *.old filename.
$ cp logfile logfile.old
Then grep -v to get rid of undesirable lines containing the pattern you want to delete.
$ cat logfile.old |grep -v "Nov/2001" > logfile
OR
Better, you can just save your logs to *.old1, *.old2 when the first day of the month arrives, run from cron.
# minutes (0-59) hours (0-23) dates (1-31) months (1-12) days (0-6)
0 0 1 * * /some/log/cleahup.sh
$ vi cleanup.sh
cp /some/log/file1 /some/log/file2
cp /some/log/file /some/log/file1
> /some/log/file
This is fairly easy to accomplish.
You could use grep.
First copy your logfile to a *.old filename.
$ cp logfile logfile.old
Then grep -v to get rid of undesirable lines containing the pattern you want to delete.
$ cat logfile.old |grep -v "Nov/2001" > logfile
OR
Better, you can just save your logs to *.old1, *.old2 when the first day of the month arrives, run from cron.
# minutes (0-59) hours (0-23) dates (1-31) months (1-12) days (0-6)
0 0 1 * * /some/log/cleahup.sh
$ vi cleanup.sh
cp /some/log/file1 /some/log/file2
cp /some/log/file /some/log/file1
> /some/log/file
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LEARN ABOUT OPENSOLARIS
logsave
LOGSAVE(8) System Manager's Manual LOGSAVE(8) NAME
logsave - save the output of a command in a logfile SYNOPSIS
logsave [ -asv ] logfile cmd_prog [ ... ] DESCRIPTION
The logsave program will execute cmd_prog with the specified argument(s), and save a copy of its output to logfile. If the containing directory for logfile does not exist, logsave will accumulate the output in memory until it can be written out. A copy of the output will also be written to standard output. If cmd_prog is a single hyphen ('-'), then instead of executing a program, logsave will take its input from standard input and save it in logfile logsave is useful for saving the output of initial boot scripts until the /var partition is mounted, so the output can be written to /var/log. OPTIONS
-a This option will cause the output to be appended to logfile, instead of replacing its current contents. -s This option will cause logsave to skip writing to the log file text which is bracketed with a control-A (ASCII 001 or Start of Header) and control-B (ASCII 002 or Start of Text). This allows progress bar information to be visible to the user on the console, while not being written to the log file. -v This option will make logsave to be more verbose in its output to the user. AUTHOR
Theodore Ts'o (tytso@mit.edu) SEE ALSO
fsck(8) E2fsprogs version 1.44.1 March 2018 LOGSAVE(8)