Shulou(Shulou.com)06/03 Report--

This article focuses on "how to write a Shell script that monitors changes in LINUX directories and files". Interested friends may wish to have a look at it. The method introduced in this paper is simple, fast and practical. Let the editor take you to learn how to write a Shell script that monitors changes in LINUX directories and files.

Script 1: save the original state of the directory to be monitored to the LOG log

Script 2: compare the original state of script 1 with this script, and save the changes to the log if the directory file changes.

Note: the principle actually uses the output value of du-sb to judge the change of the file, and then uses diff to compare it.

1. Save the original state before executing the script:

# vi initial.sh

The code is as follows:

#! / bin/bash

PATH=/bin:/sbin:/usr/bin:/usr/sbin/:/usr/local/bin:/usr/local/sbin:~/bin

Export PATH

# directories for monitoring

DIR=/root

# temporary files

TMP_A=/tmp/a.txt

# iterate through the file size and path under the specified directory and redirect to the log file

Find $DIR-print0 | xargs-0 du-sb > $TMP_A

two。 Execute monitoring script

# vi monitor.sh

The code is as follows:

#! / bin/bash

PATH=/bin:/sbin:/usr/bin:/usr/sbin/:/usr/local/bin:/usr/local/sbin:~/bin

Export PATH

# directories for monitoring

DIR=/root

# date variable

DATE= `date +% favored% H:% M`

# temporary files

TMP_A=/tmp/a.txt

TMP_B=/tmp/b.txt

TMP_C=/tmp/c.txt

# Log file

LOG=/var/log/filemodify.log

# iterate through the file size and path under the specified directory and redirect to the log file

Find $DIR-print0 | xargs-0 du-sb > $TMP_B

# compare directory changes and write the changed files to the log

DIFF=$ (diff $TMP_A $TMP_B)

If [[- z $DIFF]]

Then

Echo "Nothing change" > > $LOG

Else

Echo "Here is the change" > > $LOG

Echo "" > > $LOG

Echo "$DIFF" | awk'{print $3}'| sort-k2n | uniq | sed'/ ^ $/ d' | tee $TMP_C > > $LOG

If [- s $TMP_C]

Then

Echo "" > > $LOG

Echo "It modified at $DATE" > > $LOG

# overwrite the current monitored directory structure to the initial state

Find $DIR-print0 | xargs-0 du-sb > $TMP_A

Fi

Fi

Echo "=" > > $LOG

# cleaning up temporary files

Rm-rf $TMP_B $TMP_C

At this point, I believe you have a deeper understanding of "how to write a Shell script that monitors changes in LINUX directories and files". You might as well do it in practice. Here is the website, more related content can enter the relevant channels to inquire, follow us, continue to learn!

Welcome to subscribe "Shulou Technology Information " to get latest news, interesting things and hot topics in the IT industry, and controls the hottest and latest Internet news, technology news and IT industry trends.