Questions tagged [hashsum]
Questions related to hashes, hash values or hash codes that are returned by hash functions such as SHA-1.
290
questions
37
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4
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Find a file when you know its checksum?
I have the md5sum of a file and I don't know where it is on my system. Is there any easy option of find to identify a file based on its md5? Or do I need to develop a small script ?
I'm working on ...
- 9,554
0
votes
2
answers
6k
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different checksum of original file and copied file
I am running a script that copy a file from one location to other. In script I am calculating MD5sum using below command of original file and copied file and they are different:
echo -n "file" | ...
- 103
2
votes
1
answer
8k
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What is qemu-img consistency check?
I would be glad if someone could explain the meaning of qemu-img check <filename> command. Man pages provide very poor information about it:
check [-f fmt] [-r [leaks | all]] filename
...
- 621
1
vote
1
answer
124
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validate all packages to be correct
I have two machines. One of which started to act strange lately (aptitude segfaulting, apt requiring a library named lkbm.qo.6). As the broken machine is not vital to me, I don't want to squash and ...
- 193
6
votes
3
answers
8k
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using sed to replace pattern with hash values
I want to search the file and replace specific pattern with its hash (SHA1) values.
For example, let file.txt has the following content:
one S56G one two three
four five V67X six
and I want to ...
- 173
2
votes
3
answers
5k
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md5 or sha1 while copying a file
Is there a way in any linux distro to perform a md5sum or sha1 check while the file is being transferred from a local partition to an NFS one?
Example:
I have a NFS mounted drive and a very big file ...
- 121
5
votes
1
answer
537
views
Using kernel cryptographic functions
Is it possible to use kernel cryptographic functions in the userspace? Let's say, I don't have md5sum binary installed on my system, but my kernel has md5sum support. Can I use the kernel function ...
- 378
2
votes
1
answer
933
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How to compute a thumbnail filename from the shell?
I started noticing some time ago in Xfce4 that when I sent some file to the Trash, tumbler (the Xfce4 thumbnailer) would cause very high I/O load for quite some time. Upon investigating the issue, I ...
- 4,722
0
votes
2
answers
506
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md5sum check fails for git-man-pages.tar.gz package
When I try to verify the integrity of git-man-pages package I downloaded from "http://code.google.com/p/git-core/downloads/detail?name=git-manpages-1.8.4.tar.gz&can=2&q=" it fails with error.
...
- 1,071
1
vote
1
answer
403
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C-library HMAC_MD5 questions
We are working with an older software product that has some limited programming capabilities - specifically, no bit manipulation functions. This has created a significant problem as we need to ...
- 25
3
votes
2
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Store password as hash in wpa_supplicant.conf? [duplicate]
This question is very much related to this one.
I want to log into a user and password protected wifi which uses PEAP and maybe MS-CHAPv2. My wpa_supplicant.conf has to contain an entry like this:
...
- 709
18
votes
4
answers
37k
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A simpler way of comparing md5 checksum?
After downloading a file that has a md5 checksum available I currently check it with
md5 *file* | grep *given_checksum*
e.g.
md5 file.zip | grep -i B4460802B5853B7BB257FBF071EE4AE2
but it seemed ...
- 283
0
votes
1
answer
1k
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How to identify error in a particular file while checksum verification (which file having problem while verification) in shell script
I have two files on ftp location in csv.gz format and their checksum is in .csv.gz.md5 format. I am copying this file in my local system. I am generating check sum for it through md5sum. Now I am ...
- 2,281
0
votes
1
answer
807
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How to generate 4 WEP keys with linux commands?
I have a sagem router. this router is able to generate 4 WEP keys from a given passphrase.
Example:
Passphrase: "hahahahahahahahahahahahahahahahahahahahahahahahahahahahahahahaha"
key1: ...
- 301
5
votes
1
answer
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wpa_supplicant store password as hash (WPA-EAP with phase2="auth=PAP")
Is there a way to store my password in /etc/wpa_supplicant/wpa_supplicant.conf as some hash instead of plaintext?
By "password" I refer here to the password used for phase2 authentification. I do not ...
- 355
0
votes
1
answer
741
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md5 String and File different
Why do I become a different hash when I try:
md5 <<< "Hello"
md5 -s "Hello"
Is it because of a possible line break in the first example?
2
votes
0
answers
182
views
Compare two cdroms
I would like to verified if two CD-ROMs (UDF) identical or not.
One cdrom will be read at Windows and the other CD-ROM at Linux, where the CD-ROMs can be with different burning programs. This means ...
- 163
3
votes
1
answer
575
views
md5sum change after mount?
I have a ext3 filesystem on a .img file. After mounting and unmounting it, I noticed that the md5sum is changed, even if no file inside was changed!
md5sum myfilesystem.img
XXXX myfilesystem.img
...
- 3,443
5
votes
4
answers
10k
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is it possible to create a file given an md5 hash
I know this is a strange question, and I know that md5sum is nearly impossible to break...
but I'm just wondering if someone here knows if it is possible to recreate a file given it's md5sum hash?
I ...
- 439
4
votes
1
answer
4k
views
Trailing space when generating md5
I apologize if this has already been answered, or if the answer is simpler than I realize, but I can't seem to figure out the following:
When I try to generate an md5 from a string, either with
echo ...
- 162
2
votes
3
answers
821
views
Sanity checking MD5 sums
Do MD5 checksums contain a checkbit?
I have to copy some MD5 checksums by hand (there's no other way) and was wondering whether there is any code out there that can validate a checksum as being valid ...
- 4,529
121
votes
13
answers
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How to create SHA512 password hashes on command line
In Linux I can create a SHA1 password hash using sha1pass mypassword. Is there a similar command line tool which lets me create sha512 hashes? Same question for Bcrypt and PBKDF2.
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6
votes
1
answer
5k
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RIPEMD-160 file digest
How can I make a file digest under Linux with the RIPEMD-160 hash function, from the command line?
- 14.3k
3
votes
2
answers
6k
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How to create a md5-file for every folder in a drive recursively?
I'm searching for a script which creates a md5 chechsum file for every single folder inside drive recursivley?
I do have a copy of md5deep on my machine but I'm not that good in scripting bash.
- 121
265
votes
21
answers
382k
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How do I get the MD5 sum of a directory's contents as one sum?
The md5sum program does not provide checksums for directories. I want to get a single MD5 checksum for the entire contents of a directory, including files in sub-directories. That is, one combined ...
user17429
3
votes
3
answers
828
views
How do I easily update list of md5sums?
Sometimes I use an unreliable medium (flash) to store a good deal of data. To at least recognise bit flips I store a file with the md5sums alongside. This file is usually created by a variation of ...
- 1,583
1
vote
3
answers
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How do I redirect command output to a file?
I have a command that I run in a folder that outputs MD5 hashes and filenames on the terminal:
ls |sort -nr | xargs md5sum
I need this output in a text file that I can download and compare to ...
- 13
34
votes
2
answers
12k
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Why does the gzip version of files produce a different md5 checksum
I have four files that I created using an svndump
test.svn
test2.svn
test.svn.gz
test2.svn.gz
now when I run this
md5sum test2.svn test.svn test.svn.gz test2.svn.gz
Here is the output
...
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12
votes
4
answers
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how can a makefile detect whether a command is available in the local machine?
I began to use org-mode for planning out my tasks in GTD-style system. Putting every org files in a directory of a Dropbox folder, I run emacs to edit / manage these files from three different local ...
6
votes
3
answers
3k
views
How to delete duplicates of files in directory and subdirs?
Is there any fast method to delete duplicates of files based on any hash sum (i.e. SHA1 to be fast). Because I've got some mess in my music files.
- 174
1
vote
2
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Fastest hashing method under OpenWRT?
I frequently verify the file integrity on my OpenWrt router by hashing the files. I didn't want to use sha256sum, so I decided to use the faster md5sum. Is there anything even faster available?
- 40.2k
2
votes
1
answer
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Running md5sum on a file's contents
md5suming a file is fine, but I cannot seem to invoke md5sum to calculate the hash based only on the file's contents. (For those wondering, I'd prefer that multiple wgets of the same file return the ...
- 249
2
votes
3
answers
2k
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Rename files with random characters from sha1sum. Will the names be unique?
I'm using this command to rename files with random characters from sha1sum and move all files from subdirectories to the current directory:
for fname in `find . -type f`; do mv "$fname" $(echo "$...
- 493
14
votes
3
answers
14k
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How to pipe md5 hash result in shell
I am looking for a simple way to pipe the result of md5sum into another command. Something like this:
$echo -n 'test' | md5sum | ...
My problem is that md5sum outputs not only the hash of the string,...
- 295
1
vote
1
answer
1k
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Good "progress bar" about md5sum checking progress?
I'm using this right now:
time md5sum -c *.txt | pv | grep -v ': OK$'
but aren't there any smart solutions that can list that how many files haven't been checked? I mean I have many md5sum's in .txt ...
- 40.2k
2
votes
2
answers
498
views
Replace all files with identical hash
I want to replace all files in a target path with the same name as original.file AND the same hash as orignal.file with new.file. What's the command to do this?
Say I have updated the contents of a ...
- 123
23
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1
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What methods are used to encrypt passwords in /etc/passwd and /etc/shadow?
A careful examination of the /etc/passwd and /etc/shadow files reveal that the passwords stored are hashed using some form of hashing function.
A quick Google search reveals that by default, the ...
- 6,240
0
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2
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Shell output question
What is the output of date -u +%W$(uname)|sha256sum|sed 's/\W//g' (on Arch Linux if it matters)?
How do I find that out?
user3496
19
votes
3
answers
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Calculate md5sum of a CD/DVD
I have an ISO file, which I burned to a CD. Now how can I check if the CD is correctly created? I would like a command that calculate the hash sum that I can use to check with the hash sum I calculate ...
- 20.3k
43
votes
5
answers
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How can I get a base64 encoded shaX on the cli?
sha1sum outputs a hex encoded format of the actual sha. I would like to see a base64 encoded variant. possibly some command that outputs the binary version that I can pipe, like so: echo -n "message" |...
- 59.2k