Bash script: Batch rename files

Rename rename.sh to rename Copy to /bin folder

#!/bin/bash
SAVEIFS=$IFS
IFS=$(echo -en "\n\b") 
# By default, For loop uses $IFS variable to determine what the field separators are. 
# By default $IFS is set to the space character.

extension=mp4
while getopts e:d flag
do
    case "${flag}" in
        e) extension=${OPTARG};;
        d) dryrun=true  
    esac
done
echo "Extension: $extension";
echo "Dry run: $dryrun";

index=1
for i in $(ls *.$extension 2>/dev/null)
do
    echo old name: $i, new name: $(printf '%02d\n' $index).$extension
    if [ "$dryrun" != true ] ; then
        echo hello
        mv $i $(printf '%02d\n' $index).$extension
    fi
    let index=${index}+1
done
IFS=$SAVEIFS

sunmingtao / sample-code

Bash script: Batch rename files #181