Comments on: Mac OS X: Replicating md5sum Output Format

By: Raam

Raam — Thu, 02 Jun 2011 08:53:42 +0000

Glad to help, Carl!

By: Raam

Raam — Thu, 02 Jun 2011 08:53:23 +0000

Thanks for the tip, Mark!

By: Carl

Carl — Thu, 02 Jun 2011 08:51:22 +0000

Awesome! Thank you so much

By: Mark F Guerra

Mark F Guerra — Thu, 02 Jun 2011 01:42:19 +0000

I noticed that ‘md5sum’ on debian\ubuntu includes two spaces between the hash and the filename. On my Leopard mac, ‘md5 -r’ has only one space between the columns.

So look out if your script parses the output of md5 in a way that relies on that second space being present. In that case you should update your script to compensate, or otherwise somehow get the mac to include an additional space.

By: Raam

Raam — Mon, 29 Nov 2010 13:41:59 +0000

Hi MKB,

Does the temp.pdf file exist in the same directory as the 1.txt file? The md5sum program will read 1.txt and then look for temp.pdf in the current directory so that it can validate it.

By: MKB

MKB — Thu, 09 Sep 2010 08:14:03 +0000

I have an issue. On giving the following on the prompt:
md5sum -c 1.txt

I get the report as:

usage: md5sum [-bv] [-c [file]] | [file...]
Generates or checks MD5 Message Digests
-c check message digests (default is generate)
-v verbose, print file names when checking
-b read files in binary mode
The input for -c should be the list of message digests and file names
that is printed on stdout by this program when it generates digests.

What am I doing wrong. Please note the content of 1.txt is as below:

2e399d5b1db279126728ffac439cfe2c temp.pdf

By: Lance Quejada

Lance Quejada — Sat, 24 Jul 2010 04:33:49 +0000

Finally got md5sum working on osx http://bit.ly/cgk6mX http://bit.ly/dlwcdN #geek #osx

By: Raam

Raam — Mon, 07 Jun 2010 07:02:51 +0000

Hey Peter, you’re very welcome!

Interestingly, I just checked the man page for md5 on my system (also Snow Leopard, 10.6.3) and it does mention the -r option.

By: Peter DeGregorio

Peter DeGregorio — Mon, 07 Jun 2010 06:33:11 +0000

Thanks for this … Oddly, the man page for md5 on Mac OS X Snow Leopard does not mention the -r option, so this information you’ve posted is especially helpful.

By: Raam Dev

Raam Dev — Fri, 07 May 2010 15:36:40 +0000

@enogrob BTW, you may also be interested in this other post I wrote: Mac OS X: Replicating md5sum Output Format – http://bit.ly/5s3Pv3