renames files in the directory to their sha1 checksums keeping the extension

hashdir.sh

#!/bin/bash

# Renames all the files in the current directory
# to their sha1 checksums keeping the extension
# it prints the list of the converted files at
# the end

# Requires the shasum command that comes with xcode

ls

read -r -p "Continue? (yes/no): " continue

# Exit if not confirmed
if ! [[ ${continue} =~ (yes) ]]; then exit 1; fi;

for i in *; do
  sha1=`shasum "$i" 2>/dev/null | awk '{split($0, a); print a[1]}'`
  extension=`echo "$i" | awk '{print a[split($0, a, ".")]}'`
  # Rename the file
  mv "$i" "$sha1.$extension"
  # Print the reference
  echo "$sha1 < $i"
done

This is brilliant. Thanks for sharing. I used it to sort out all of my random .txt files.