Rename Files Bash Script - Loop Problem

Question

I am trying to write a script which will take my file and rename pt-1 to pt2 for eg. testfile_pt-1_date.ts at the moment the script will correctly rename to file and copy it to the specified folder correctly.

The problem I have is if there is a file eg. testfile_pt_date.ts, the file is not being renamed but is being copied which is not what I want, I want the file to be ignored, I am not sure why the for do loop is accepting a file with pt in it, anyone know where I have gone wrong.

#! /bin/bash

file=$1
for file in *_pt-1_*.ts
do
echo "$1"    
a="$(echo $1 | sed s/_pt-1_/_pt2_/)"
cp "$1" "$HOME/SGTV/${a##*/}"
echo "$a"
done

Answer 1

Instead of a loop, I would suggest you to use the dedicated rename tool. It's easier to read, faster to write and avoid confusion.

rename 's/_pt-1_/_pt2_/' *_pt-1_*.ts

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Warning: rename is a mess on most distributions. If you're using Debian or a derivative, make sure the rename package is installed (not just the rename binary).