Script to bulk rename all files in a folder to .bak. Optionally creates blank entries for those files as well. Includes undo operations.

bulk_rename_bak.sh

#!/bin/bash

if [ $# -ge 1 ]
then
    if [ "$1" == "add" -o "$1" == "zero" ]
    then
        for file in $(find . -maxdepth 1 -type f)
        do
            # exlude the script from renaming
            if [ "$file" != "$0" ]
            then
                mv "$file" "$file.bak"
                
                # generate empty files with the same name
                if [ "$1" == "zero" ]
                then
                    touch "$file"
                fi
            fi
        done
    elif [ "$1" == "remove" -o "$1" == "restore" ]
    then
        for file in $(find . -maxdepth 1 -type f -name "*.bak")
        do
            original=$(basename $file .bak)

            # remove empty files with the same name
            if [ "$1" == "restore" ]
            then
                # only remove empty placeholder files
                if [ -s "$original" ]
                then
                    rm -f "$original"
                fi
            fi
            mv "$file" "$original"
        done
    else
        echo "Invalid operation mode!"
        exit 2
    fi
else
    echo "Please specify operation mode!"
    exit 1
fi