Lowercase the names of all files in a directory (defaults to current directory).

lowercase_file_names

#!/bin/bash
echo

path="."
counter=0
remainder=0

if [ ! -z "$1" ]; then
    path="$1"
fi

echo "Lowercase File Names"
echo "  > Getting file list"

# Get a list of files
files=`ls -1 $path`

# Get a file count
fc=`ls -1 $path | wc -l`
remainder=$fc

echo "  > Renaming $fc files"

for f in $files; do

    # Keep track of our iteration so long operations
    # don't seem like they're hung/frozen
    ((counter++))
    ((remainder--))

    if [ $((counter%2)) -eq 0 ]; then
        echo "    - $remainder remaining"
    fi

    # Get the lowercased name of the file
    fl=`echo "$f" | awk '{print tolower($f)}'`

    # Rename the file
    mv "$f" "$fl"

done