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This article mainly explains "how to use Shell to monitor file changes", the content of the article is simple and clear, easy to learn and understand, now please follow the editor's ideas slowly in depth, together to study and learn how to use Shell to monitor file changes!

File monitoring can cooperate with rsync to achieve automatic file synchronization, such as monitoring a directory, when the file changes, use the rsync command to synchronize the changed files. (can be used for automatic code publishing)

Implement automatic file synchronization, such as listening to a directory, and use the rsync command to synchronize changed files when they change. (can be used for automatic code publishing).

Inotify is a feature of the linux kernel and can be used above kernel 2.6.13.

If you can install yum install inotify-tools in a shell environment, there are two commands available after installation: inotifywait and inotifywatch,inotifywait are the commands that need to be used.

Monitor / usr/local/src directory:

/ usr/local/bin/inotifywait-mrq-- timefmt'% d/%m/%y% HGV% M'-- format'% T% w% f% e'-e modify,delete,create,attrib / usr/local/src

Parameters:

-m continuous monitoring

-r Monitoring directories using recursion

-Q reduce redundant information and print only the information you need

-e specifies the events to be monitored, separated by commas

-- timefmt time format

-- Information on file changes monitored by format

-- timefmt description:

Ymd stands for year, month and day, H for hours and M for minutes.

-- format description:

After executing the above command, create a 1.txt file under the listening directory and get the following result:

22-03-18 17:22 / usr/local/src/ 1.txt CREATE 22-03-18 17:22 / usr/local/src/ 1.txt ATTRIB

The function of this script is to cycle to listen for the addition, deletion and modification of a file or directory, and to execute the set script file when the event occurs.

#! / bin/sh # Monitoring files or directories filename=$1 # Monitoring scripts script=$2 inotifywait-mrq-- format'% e'-- event create,delete,modify $filename | while read event do case $event in MODIFY | CREATE | DELETE) bash $script;; esac done

Background execution of shell script

Nohup

Use nohup, where test.sh is the script being executed and out.txt is where the information is output.

Nohup sh test.sh > out.txt & Thank you for reading, the above is the content of "how to use Shell to monitor file changes". After the study of this article, I believe you have a deeper understanding of how to use Shell to monitor file changes, and the specific use needs to be verified in practice. Here is, the editor will push for you more related knowledge points of the article, welcome to follow!

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