curl and get hash sum

fileDownload.sh

#!/bin/sh
# usage: ./fileDownload.sh [targeturl] [savefilename]
# Tested on: Mac OS X 10.10.5
# Build Version: 14F1605
# 
# ex.
# $ ./fileDownload.sh http://free.nchc.org.tw/linuxmint/isos//stable/17.3/linuxmint-17.3-mate-32bit.iso linuxmint-17.3-mate-32bit.iso
#   % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
#                                  Dload  Upload   Total   Spent    Left  Speed
# 100 1480M  100 1480M    0     0  4222k      0  0:05:58  0:05:58 --:--:-- 4232k
# MD5 (linuxmint-17.3-mate-32bit.iso) = 41c191ead435b895e74098c35519c8a2
# c91076dc8db7979572ebcba2e9fa5c06b995807b  linuxmint-17.3-mate-32bit.iso
# c571f805bed447ec335e43a2092caf86aba72a8341ef59964efae9da9658b3ca  linuxmint-17.3-mate-32bit.iso
curl $1 >> $2
if [ $? -eq 0 ]; then
  md5 $2
  # md5sum $2
  shasum $2
  # sha1sum $2
  shasum -a 256 $2
  # sha256sum $2
fi