Checking content of a file

checksumcontent.sh

#!/bin/bash

if [[ "$#" -lt 0 ]]
then
  echo "Too little arguments, this script need some files to check!"
  exit 0
fi

for i in "$@"
do
  if [[ -e "$i" ]]
  then
    shasum=`tr -d "[:space:]" < $i | shasum | cut -d " " -f 1`
    printf "$shasum is SHA1 checksum of the content of $i\n"
  fi
done