Check a password against https://haveibeenpwned.com/

pwnedpassword.sh

#!/bin/bash
read -s -p "Password: " password
echo
hash=$(echo -n $password | sha1sum | awk '{print toupper($1)}')
prefix=${hash:0:5}
response=$(curl -s https://api.pwnedpasswords.com/range/$prefix)
while IFS=':' read -ra line
do
  hash_line="$prefix${line[0]}"
  count=$(echo ${line[1]}|tr -d '\r')
  if [ "$hash_line" == "$hash" ]; then
    echo "Password '$password' breached $count times."
    exit 1
  fi
done <<< "$response"

echo "Password not found in breached database."
exit 0