md5sum is a computer program that calculates and verifies 128-bit MD5 hashes, as described in RFC 1321.

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36
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12answers
5k views

What is the value of MD5 checksums if the MD5 hash itself could potentially also have been manipulated?

Downloads on websites sometimes have an MD5 checksum, allowing people to confirm the integrity of the file. I have heard this is to allow not only corrupted files to be instantly identified before ...
2
votes
6answers
151 views

Compute md5sum of every 1MB part of stream from pipe

I want to do checksumming of large files and stream in unix/linux, and I want get many checksums from every large part of file/stream, every 1 MB or every 10MB. For example, I have disk image, ...
3
votes
1answer
78 views

Why does tar with -z option create archive with different hash everytime

Can you tell me why tar czf archive.tar dir creates archive with different hash everytime (I check with 'md5sum') Without compression parameter -z or with parameter -j instead all works fine. ...
25
votes
3answers
4k views

How accurate is `md5sum`?

When using md5sum to verify the integrity of a file, how accurate is the process? Does a verified MD5 mean that EVERY bit is exactly the same, or is there a threshold that must be broken before ...
1
vote
1answer
40 views

Quickly Maintain Database of sha256sums? [closed]

I have many different disks (primarily harddisks) storing various files. I want to know that they are all backed up in some form. Given that I have terabytes of files somehow (backups of backups ...
0
votes
1answer
415 views

Rename files by md5 checksum

What program can I use to rename files with their calculated md5 checksums? GUI or CLI Programs for Linux or Windows or scripts for DOS or the Linux terminal.
1
vote
3answers
187 views

Finding a file by md5sum

Given the md5sum of a file, I want to know if anywhere else in the directory tree is another file with the same md5sum (but maybe under a different name). How can I do that in bash? P.S.: To ...
0
votes
0answers
44 views

How to MD5sum via right-click in Lubuntu Precise?

I found this link (md5sum via right click in ubuntu) which explains how to do what I want to do in Ubuntu, but it doesn't work in Lubuntu... I don't have a "scripts sub-menu" in my right-click ...
0
votes
1answer
52 views

How to print md5sum on separate line?

I am trying to calculate the md5 hash of a string (say 'hunter5'). To do this, I run md5sum , type or paste the string, then type Control-D (EOT) twice. > md5sum ...
0
votes
2answers
169 views

find duplicate files by size and MDF

I am writing script to search for dups files and group them by size and then by their MD5 check sum. here is my script: find . -type f -printf "%s\n" | sort -rn | uniq -d | xargs -I{} -n1 find -type ...
0
votes
0answers
49 views

How to verify download of TortoiseHg software for Windows

When installing software onto my PC, I generally like to run a hash check against my download before installing it. Many download pages provide an MD5sum to use for this kind of check. See: Some ...
0
votes
1answer
2k views

MD5 hash of original Windows 8 pro iso file

What is the MD5 hash of the original Win 8 Professional ISO (upgrade version)? I downloaded the file over multiple download sessions, and want to make sure that the file is not corrupted. Does the ...
0
votes
1answer
747 views

How can I compute an md5sum on Macintosh OSX Lion?

How can I compute an md5sum on Macintosh OSX Lion? Is it built in to the OS or do I need to download an application?