md5-check by bash

md5check.sh

#!/bin/bash                                                                                                                                 

# USAGE: md5check [files]                                                                                                                   
#                                                                                                                                           
# example: ./md5check *.gz                                                                                                                  

if [ $# -eq 0 ]; then
  echo "USAGE: md5check [files]"
  exit 0
fi
                                                                                                                                            
for file in "$@"; do
  if [ ! -f ${file}.md5 ]; then
    echo "-------------------------------------"
    echo "[WARNING] ${file}.md5 does not exists"
    echo "-------------------------------------"
  else

    generated_md5=`md5 -q "$file"`
    answer_md5=`cut -d' ' -f2 "$file".md5`

    if [ $generated_md5 != $answer_md5 ]; then
      echo "-------------------------------------"
      echo "[WARNING] md5 for ${file} does not match"
      echo "-------------------------------------"
    fi

    echo "${file} ...ok"
  fi
done