Ubuntu Unleashed 2015 Edition: Covering 14.10 and 15.04, Tenth Edition

Purging Logs

Many programs maintain some variety of logs. Often, much of the information in the logs is redundant or just useless. The program shown in Listing 41.7 removes all lines from a file that contain a particular word or phrase, so lines that you know are not important can be purged. For example, you might want to remove all the lines in the Apache error log that originate with your test client machine because you know those error messages were produced during testing.

LISTING 41.7 Purging Log Files

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#!/usr/bin/perl# Be careful using this program!# This will remove all lines that contain a given word# Usage:  remove <word> <file>$word=@ARGV[0];$file=@ARGV[1];if ($file)  {  # Open file for reading  open (FILE, ...