Re: Two 1541-II drives with problems

On 04/25/2014 07:16 AM, Marko Mäkelä wrote:
> On Thu, Apr 24, 2014 at 11:16:29PM +0200, silverdr@wfmh.org.pl wrote:
>>        diff - compare files line by line
>>
>> But diff can be used as well.
>
> To compare binary files that are of the same size, I often do something
> like this:
>
> od -Ax -t x1 file1.bin > file1.txt
> od -Ax -t x1 file2.bin > file2.txt
>
> diff -u file1.txt file2.txt

Looks a bit complicated. I usually do the following:

  cmp file1 file2

If you don't get a complaint, they are the same. If you get a message 
aboug differing, you do it again with the '-l' option:

  cmp -l file1 file2

This will list all the differences (octal) and where they are (decimal).

Then are times when I need to compare 2 whole directory trees (like 
verifying a backup done with 'rsync'). This is best done with

  diff -r dir1 dir2

and will tell you if files differ or are missing from one tree. It works 
with any size (tested up to 2 TB per directory). Doesn't care about text 
or binary.

Should work on most UNIX variants.

  Gerrit





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