Recursively find large files

find_large_files.sh

#!/bin/bash

# report files greater than some size (default 100 MB)
# does so recursively starting at some dir (default pwd)

# to make executable, do:
# chmod +x find_large_files.sh

print_help () {
    echo "Recursively find all files larger than some size"
    echo "Usage:"
    echo " -d STARTING_DIR (default pwd)"
    echo " -s MIN_FILE_SIZE_IN_MB (default 100)"
    exit 0
}

while getopts "d:s:h" opt; do
  case $opt in
    h) print_help ;;
    d) DIR="$OPTARG" ;;
    s) SIZE="$OPTARG" ;;
    \?) echo "Invalid option -$OPTARG" >&2 ;;
  esac
done

if [ -z "$DIR" ]; then
    DIR=$PWD
fi

if [ -z "$SIZE" ]; then
    SIZE=100M
else
    SIZE=$SIZE"M"
fi

find $DIR -xdev -type f -size +$SIZE