How to change the name of files on local disk using a Linux/Unix script and regular expression.

Issue here is there are some files on local disk that are breaking a PHP application that uses them (points to them). The names of the files need to be changed a little as they do not comply with a naming convention, I could easily do this manually using mv or cp however there are many files and single commands would be too laborious.

Ok first things first, I need to get the names of the files from the server and create a sandbox environment on my own Linux box. Once all testing is done I will run the script on the corporate machine.

Creating an environment by duplicating the original file system

Went to the location of the files and backed up the data to a tar zip. This way I can roll back quickly if needed.

tar -zcvf backup_name.tar.gz folder_to_be_backed_up/

I did an ls of the directory and then cut and pasted the results into a text file (theFile.txt) on my sandbox machine (cut and paste using gedit), once I had a text file with the entire directory listing (one file on each line) I ran the following command.

#!/bin/bash
while read filename; do
`touch $filename`
done < theFile.txt

Ok so on the sandbox machine I wrote the following shell script and tested it, this script essentially does a string replace on the explicit part of the file name I asked to match and replaces it with the new string eg ‘s/needle/newNeedle/’ can change a file called the_needle_001.mp3 to the_newNeedle_001.mp3.

#!/bin/bash
for f in test
    do
        new=$(echo $f | sed -e 's/Original_Name/ChangedName/')
        cp -R $f $new
    done

This will create a new set of files with the new name and leave the old names in place.

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