MD5 (Message-Digest algorithm 5) is a 128-bits unidirecional hash algorithm.

learn more… | top users | synonyms

3
votes
1answer
27 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. ...
0
votes
1answer
54 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
votes
1answer
53 views

How to extract MD5 data from a CSV file

I have been sent a csv file that contains a list of emails that i'm told has MD5 encryption on it. I want to be able to extract the email addresses from the file. If i double-click it opens in Excel ...
3
votes
1answer
32 views

Any examples of duplicate MD5 Hashes?

I was wondering, as it is theoretically possible to have duplicate MD5 hashes, are there any known examples of this, or is it all just theoretical?
-2
votes
2answers
43 views

Is it possible to generate a file from a md5sum (or sha1 or such)?

Is it possible to recreate a file if you have the files md5sum? Or is it only possible through brute-force? Is it any differences between the different algorithms?
1
vote
1answer
36 views

How does applications read my hashed passwords?

mpdas (last.fm scrobbler for mpd) forces one to write password hashed in md5. But if it's hashed, how does it login to last.fm? Isn't hash function one-way only?
13
votes
6answers
427 views

How can I verify that a 1TB file transferred correctly?

I frequently transfer VM images from hypervisors to an archive server for long term storage. I transfer using netcat since it is faster than scp, rsync, ect.. hypervisor$ cat foo.box | nc ...
0
votes
0answers
32 views

Deleting sentences in database file

I'm writing a MD5 based antivirus, and my friend send to me a document with thousands of samples and their MD5. All is fine, but I have to delete all sentences what contain "File does not exists:" ...
0
votes
1answer
631 views

Can Robocopy ensure file integrity?

I am trying to copy a large file, around 10G size, over Internet using Robocopy, but I am a bit concerned about the file integrity. So can I just trust Robocopy to ensure file integrity or I need to ...
1
vote
0answers
26 views

Very strange harddisc behaviour

Running Windows 7 64bit. Harddisc is installed internally and connected via SATA: Videofile xyz.mp4 can be opened and played without any problems. If I remove the disc and put it in an external ...
0
votes
3answers
126 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 ...
10
votes
3answers
981 views

Files with same content but with different md5sums when gzip'd?

I don't know why this is happening, but I upload some files to Amazon S3 then delete the sent files checking their md5sum both in Amazon and locally. But recently I found this issue about the same ...
1
vote
1answer
66 views

How interact in for with bash?

I know this must be sound a weird question, but for me, that always developed in C, C++ and Java (and now in bash) seems more weird tough. I'm trying to check if md5 and filename from two list (one ...
0
votes
1answer
34 views

clear md5 cache on Mac

I noticed that calculating the md5 sums, for large files, take much less time the second time you run the md5 command on them. Is there any way to clear the cache? I'm actually writing a parallel ...
0
votes
1answer
571 views

how to detect file corruption?

Sometimes, my files become corrupted without me noticing - this happens to my photos a lot. This doesn't bother me when I notice it because I have backups. It's growing to be a pain to manually go ...
0
votes
1answer
177 views

md5pass or sha1pass on mac os

I'm looking for a hash tool on MacOS (shell), hope it works like md5pass on Ubuntu. Calculate case sensitive hash code. Calculate salted hash code. md5 is good, any other algorithm is ok. I ...
0
votes
2answers
136 views

What's the purpose of brute forcing MD5 hashes? [closed]

Great article about hacking passwords on Ars Technica: http://arstechnica.com/security/2013/03/how-i-became-a-password-cracker/ But what I don't understand is why? From a black hat's standpoint, ...
0
votes
1answer
512 views

EFI partition malware?

I have a 2011 Macbook Pro, running 10.8.2 and was worried that the laptop may have been tampered with while left unattended for a few days while abroad in Asia. I have mounted my EFI partition using: ...
0
votes
2answers
251 views

What's the percentage of having two files with the same byte size length giving the same md5 hash? [closed]

I'm developing an app that will store a lot of files, and in case of images, it will resize them and save the different thumbnails we need, so when a user uploads an image, it will save more 8 files ...
0
votes
1answer
202 views

MD5 (OSX) and Output

when using MD5 i get a text file output of the full path to the file and file name and then space and the hash. wondering if there's a way omit the path and just have filename = hash using terminal ...
0
votes
0answers
99 views

Use of TCP-MD5 option

For a research application we need to use the TCP-MD5 option (RFC 2385). After some research we have finally found that only a few GNU/Linux distributions support the option out of the box. We ...
3
votes
3answers
879 views

Is there a tool that automatically downloads and compares md5sums?

What I want but can't find: $ download -url http://download.com/me.zip -md5 http://download.com/me.md5 [================================================================>] 100% md5check .... OK $ ...
0
votes
1answer
149 views

md5sums differ between CIFS and NFS

I'm doing some research on 'cribbage' an Ubuntu 10.04 box which connects to 'prodcsamba01' via CIFS: cribbage $ mount | grep prep //prodcsamba01/prepfsnr on /prep type cifs ...
0
votes
5answers
5k views

Is it possible to decrypt MD5 Hashing? [closed]

I was seeing a video on how to hash passwords with MD5 Hashing. After googling on it I found out that Facebook also uses MD5 hashing scheme. Now I was curious to know if we can decrypt the password ...
0
votes
1answer
100 views

Verifying file integrity on NTFS under linux

I have an NTFS volume that I share between a linux machine and a windows machine. Recently I have had a couple of strange problems where files have become corrupted. This has affected some media ...
3
votes
1answer
588 views

Why do two identical zips on Linux have different md5 sum values?

I created these two zip files about 24 hours apart. $ ls -l /tmp/*.zip -rw-rw-r-- 1 scott scott 1401289 Mar 21 20:11 /tmp/inc1.zip -rw-rw-r-- 1 scott scott 1401289 Mar 22 19:29 /tmp/inc2.zip You ...
0
votes
1answer
472 views

md5deep not working with duplicated files in different directories

I want to use md5deep to check that some copied directories are copied correctly. But seems md5deep doesn't use the filenames stored in the genearted .md5-files when matching! This actually means, ...
1
vote
3answers
2k views

md5sum of files in two folders

I'm trying to compare all the files in two folders via an md5sum in one command. Some like the following (bash) in Debian: $ cd ~/FOLDER1 $ md5sum ~/FOLDER2/* | md5sum -c - The idea is that the ...
2
votes
1answer
208 views

Sorting a checksums file by file name

I'm trying to sort the output of the md5sum program by file name, numerically (that is, file names all match log-\d+\.txt). I tried sort -g "-t " -k 2 CHECKSUMS but it sorts by checksum. Using ...
3
votes
2answers
645 views

Is there a way I can compute MD5 or SHA hashes on Windows and Linux without the need for a specific application? [duplicate]

Possible Duplicate: Is there a built-in method for computing a sha1 or md5 hash in windows 7? If I am running Windows 7 or a distribution of Linux how can I compute MD5 or SHA hashes ...
0
votes
1answer
1k views

rsync directory complete but some files md5sum is different

I'm using rsync to copy a directory from host A to host B. After the rsync is completed successfully, I check the files with the directory and find that some files' md5sum is different but the ...
0
votes
0answers
231 views

Grub password appears to be plain md5 in hex, not md5-crypt in base64

The menu.lst file has a line that looks like "password --md5 c5ae09c39ad1e0d2aa12231eea7bc5c2" The grub-md5-crypt command creates salted, iterated md5 hashes that look more like ...
1
vote
2answers
2k views

How to copy files and create hardlinks instead of copying when files are identical

Are there any tools for Windows that can copy one dir to another read copied content generate MD5 if the current file is identical to a previously copied one, create a hardlink in destination dir ...
0
votes
3answers
547 views

How to convert Windows filenames (from a checksums.md5) to *nix notation so I can use it on my shell with md5sum?

I have some checksums.md5 verification files from an ntfs external drive, but using windows notation: \ instead of /, spaces between file names (not escaped), reserved shell characters (like (, &, ...
2
votes
3answers
218 views

How do I check the checksum of a download and why should I?

My memory isn't great but I think five or six years ago, when I downloaded some package, there was never a checksum line under the download icon on the webpage. And no instructions to "check the ...
1
vote
1answer
2k views

md5sum on large files

Context: I have a large terabyte drive with various types of large media files, iso files etc. I would like to verify its contents using md5sum on the first megabyte due to speed/performance. You can ...
1
vote
3answers
2k views

How to add hash to MS Word documents?

I'd like to add a SHA, or some other kind of a hash to a Word (for Windows) document. Is there a good program / macro that would help me with that? Or some kind of a tutorial somewhere on the net? ...
-2
votes
1answer
2k views

Which tools do you guys use for MD5 brute forcing in Mac OS X? [closed]

I am new to Macs, so I don't know which tool is good for MD5 brute forcing in Mac OS X. Do you have any suggestions?
1
vote
1answer
61 views

Are there two same md5sums in different files?

Are there two files which has same md5sums but different content? Is there way to find such files easy-way? is there some article/blog post about it ?
8
votes
2answers
892 views

Is verifying a MD5 sum after copying 100GB of data safe?

I'm copying 100GB from a Windows 7 workstation to 2 external drives (if you have only one backup, then you have none). All files have a MD5 checksum. I've verified all MD5 checksums on the external ...
4
votes
3answers
586 views

Linux, is it necessary to to Md5sum when copying files to new directory on same hard drive?

I'm using an ubuntu server and the project I am working on has very strict requirements regarding making sure data is not corrupted. I can't seem to find a good answer on this, when doing a local copy ...
0
votes
1answer
286 views

how to use md5sum on certain files

Imagine I have a filelist like this: file1.php file2.php login1.php login2.php logout1.php logout2.php And I want to do an md5sum on files called login* <- something like that. I need to count ...
7
votes
4answers
10k views

How to install MD5 to Ubuntu?

How can I install MD5 in Ubuntu without using apt-get?
5
votes
3answers
2k views

How to verify a .md5sum file in snow leopard?

In snow leopard there is program that can do md4 checksums. How can I verifiy a .md5 file?
0
votes
1answer
656 views

DBAN MD5SUM Hash for Version 2.2.6 (i586)

Found this forum thread on SourceForge, but the MD5SUM Hash is for "dban.bzi", so that doesn't help at all. I checked elsewhere in the SourceForge forums, but I didn't find anything else. I also ...
1
vote
1answer
840 views

OSX 10.6.6 SSH md5 break-in check

Information Recently one of the linux servers that I access was compromised to steal passwords and ssh keys using a modified ssh binary. This lead me to question if the attacker had compromised my ...
0
votes
2answers
476 views

Ubuntu 10.10 desktop edition installation fails

I just tried to set up a VM using VirtualBox and Ubuntu 10.10 desktop edition. Installation proceeded fine, but at ~60-80% I got a message that it failed and it's most likely a defect CD or a read ...
1
vote
2answers
3k views

How can I copy files to an external drive and verify their integrity in OS X?

I'm moving large amounts of data from one external drive to another larger one. The files are important and the smaller drives need to be cleared and reused (HD camera). Is there some utility for ...
1
vote
2answers
1k views

Get md5sum without file name?

I need to get the md5 sum of a file on AIX, but the md5sum program prints the sum followed by the name of the file. How can I get the sum without the file name.
3
votes
7answers
798 views

Why do sites offer an MD5 hash of a file?

Why do sites offer an MD5 hash of a file? How does that help you verify the integrity/source of the file? Wouldn't paying attention to your URL be enough security?