Questions tagged [hashsum]

Questions related to hashes, hash values or hash codes that are returned by hash functions such as SHA-1.

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The download files has the same name, but different hashsum

I downloaded "testdisk-7.2-WIP.linux-x86_64.tar.bz2" from 2020 and 2021, they have the name and seems same version, but have different hashsums. Looking inside the packages, one is created ...
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How does md5sum computer hash values of some users that are in a text file then try to crack them [closed]

Can someone please advice what's best way to make md5sum compute the hash values of file that contains some users password that are already hashed with MD5, so the text file containing passwords that ...
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37 views

Linux SHA1 Time Complexity

Is time complexity of Linux SHA1 linear? That means that 2GB file is hashed twice longer than 1GB file?
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SHA1 verification of external deb package before install

I have a .deb file and its SHA1 checksum information. How do I check the .deb file's authenticity using this checksum before installing? There's many entries on Google for "how to verify ...
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How to create a deterministic tar.gz using tar? [duplicate]

I have followed following answer for Tar produces different files each time and Why does the PIGZ produce a different md5sum. My goal is to generate deterministic compressed file in tar.gz format (...
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Why is verifying downloads with MD5 hash considered insecure?

I have downloaded a Debian ISO with jigdo, the download has finished successfully, and printed the following message: FINISHED --2021-01-22 11:57:20-- Total wall clock time: 4.3s Downloaded: 9 files, ...
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2answers
23 views

Shell Script to compute hash for every X bytes

I have a file of size 128KB, and would like to compute SHA256 hash for every 32KB. i.e Hash 1 - Start of file - Start of file + 32KB Hash 2 - 32KB - 64KB Hash 3 - 64KB - 96KB Hash 4 - 96KB - 128KB I ...
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1answer
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How to verify integrity of software when the download provider doesn't publish hashes?

I noticed that certain software does not provide hash anymore nowadays. E.g. Zoom https://zoom.us/download wolf@linux:~$ ls -lh zoom_amd64.deb -rw-rw-r-- 1 wolf wolf 44M Jan 1 00:00 zoom_amd64....
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Concurrency of a find, hash val, and replace across large amount of rows

I have a bunch of files and for each row there is a unique value I'm trying to obscure with a hash. However there are 3M rows across the files and a rough calculation of the time needed to complete ...
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MD6 hash generation linux command for 128-bit, 256-bit, 512-bit MD6 hashes

there are multiple checksum commands in the GNU Core Utilities in most Linux distros for famous hashing algorithms like SHA2 or MD5, But I need a command for MD6 (message digest 6) checksum that can ...
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Recreate folder structure using md5 hashes

Given a long list of md5 checksums and copies of these files, renamed and in different folder structures: How can I recreate or recover the original filesystem structure? Assuming no hash collisions. ...
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Is the difference between md5, sha1 and sha256 sums the less important the larger the file?

I am compressing a number of files with size in the order of 5GB before sharing them. On the one hand, I would like to provide a hash sum for the recipient to check the files' integrity. On the other ...
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Hash-based filesystem?

Is there a hash-based filesystem, where: There is a store of blocks (perhaps 512b, 4KB or 128KB) indexed by the hash of their contents. Each block has a usage count. When it reaches zero, the block'...
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106 views

how to add md5sum value for csv file using awk

I have csv file as mentioned below format, 1,123-456,IND 2,234-567,US 3,345-678,AUS 4,333-444,SA I don't want to use any loops, I want to generate md5sum value for each row using AWK command as ...
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What command will give me a binary delta between two files and let me apply it?

I have two large files. a.qcow2 is 16GB. b.qcow2 is 17GB. The first 16GB of b.qcow2 is 95% identical to a.qcow2. What Linux commands will let me produce the delta between the two files? (Which ...
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verify sha1sum and print directory & filename of corrupt files

I have a series of directories with sha1sums and md5sums files in. The format of these files is the usual hash space space filename, with one hash/file per line. I want to verify the files and print ...
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Why are end-of-file and end-of-input-signal treated differently by sha256sum?

I was trying to compute sha256 for a simple string, namely "abc". I found out that using sha256sum utility like this: sha256sum file_with_string gives results identical to: sha256sum # ...
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1answer
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MX Linux ISO checksum mismatch

I went to the MX Linux website and their "Direct Download" linked me to their Sourceforge downloads page. I selected the first option - MX-19.2_September_x64.iso then checked the download ...
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2answers
398 views

How do I md5sum all files in /bin and sub directories and verify the hash using bash script?

I tried with find /bin -type -f -exec md5sum {} + >>sum.md5 The /bin directory contains a variety of files types, but the above returns the checksums for only regular files. Is there any way ...
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23 views

Hash sum via pipe, abort if no match

How can I verify a checksum of a file by piping it? e.g. I want to do something like curl -sL https://example.org/maybe-safe-maybe-not.tar.gz | md5sum 8da7904f495f682c39fa505b6404f9d1 | tar xvzC /usr/...
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2answers
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How to implement string to array hash in perl?

I am trying to count occurrence of each word on particular line of input. Given example (what I am trying to achieve): $./foo.pl asd fgh asd iop zxc asd: 1, 2 fgh: 1 iop: 2 zxc: 3 Just a program to ...
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Help with regex with sed -i for a tampermonkey script

I'm writing a tampermonkey script, using git and jsdelivr to store and send it to the users. For the jsdelivr to work correctly, i need to change the commit hash in the url. // @require https:/...
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how to check if someone override a directory?

Lets say i have an existing directory and someone did cp -r over this and some files changed. I want to detect this change. How can i do it ? I thought of using md5 or some checksum calculator for ...
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How to use openssl shake256 hash string into a specified length hash-string?

How to use openssl shake256 hash string to a specified length hash-string? I use the following command to generate a shake256 hash string with the default length in Linux: echo -n 28713 | openssl ...
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1answer
31 views

How to append input to sha256sum

I want to type in sha256sum, then << cat, so that I can enter in some word and then receive the output as the hash. But I can't do this because it shows me no file called cat, or shows me a ...
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Trying to use seek and skip, but md5 is different

I ran into an unexpected behavior when using dd. I write this to myfile: root@io-generator-app-0:/# dd if=/dev/urandom skip=10 of=/tmp/myfile bs=4k Then using skip option again to write it to some ...
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1answer
589 views

VirutalBox: apt download / hashing problem (APT Hash Sum Mismatch)

I'm trying to install docker with apt from the https://download.docker.com/linux/debian/ repo. Unfortunately installation always fails with a hash mismatch warning. I have already tried everything ...
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160 views

ConnMan: how to store password as hash?

We are looking for a way to get ConnMan to hash passwords (hashed on disk, i.e. not in plain text). We are wondering if it is possible to enable such feature by compile-time definition or runtime ...
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34 views

Checksum during rsync questions

Simple questions, I hope. if I'm running checksum (as a -c flag) on rsync, like so - rsync -c --log-file="/location/logfile.txt" \ -e "ssh -p {port number}" {source} {destination} will detected ...
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Checksum comparison file too large

I am trying to run a checksum comparison task on a large folder that I rsync from one Synology server to another. What I am trying to get is an output that shows me any differences between the ...
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326 views

Fresh download kali-linux-2020.2a-rpi3-nexmon-64.img.xz chksum mismatch

The downloaded file is a different size to that on the Kali website: https://www.offensive-security.com/kali-linux-arm-images/ Kali Linux RaspberryPi 2 (v1.2), 3 and 4 (64-Bit) Torrent 2020.2a ...
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409 views

How should I replace a value in JSON file with its md5 value using jq command?

I have a big log file containing a line as below example : {"data_1":210,"target_number":1096748811,"extra_data":66} {"data_1":0,"target_number":7130881445,"extra_data":56} {"data_1":1712,"...
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1answer
912 views

How to fix Kali Linux 2020.1 hash sum mismatch error?

I just recently download Kali Linux .ova from here When I run sudo apt update , it returns Get:1 https://packages.microsoft.com/repos/vscode stable InRelease [3,958 B] Get:2 https://packages.microsoft....
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hashes are the same: rmmod, modprobe, modinfo, modinfo, lsmod, insmod, depmod

I am get this same output after checking hashes of rmmod, modprobe, modinfo, modinfo, lsmod, insmod, depmod root@user:/var/log/apt# md5sum /sbin/modprobe 150aa565f1e37e2fd200523b6b4fcedf /sbin/...
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Acuracy Level of md5sum Comparison

Doing here some file listing with find command as follows: find /dir1/ -type f -exec md5sum {} + | sort -k 2 > dir1.txt Then: find /dir2/ -type f -exec md5sum {} + | sort -k 2 > dir2.txt ...
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How to calculate the checksum of a file's name?

I tried with openssl as it is very fast: openssl sha1 "$(basename "very_big_image.png")" But this just substitutes the actual file for check summing.
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Why does the PIGZ produce a different md5sum

I observe that when I use PIGZ version, generated tar file's md5sum hash is different than the next one generated. Instead of PIGZ=-n if I use GZIP=-n generated hashes are same. I have followed ...
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60 views

Get different md5 value when to verify ssh public key

The author wrote ssh public finngerprint in the webpage. fingerprint If you want to send me an email, my fingerprint is: 5029 E0D0 F458 72E4 09D3 308D 1D51 378E E348 35B6 Now i make a ...
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Hash Sum mismatch Installing docker-ce on Virtualbox Ubuntu Server 18.04

I am following the directions to install Docker-CE. Instructions located at: Get Docker Engine I follow all steps on the guide and get Hash Sum Mismatch when executing the command sudo apt-get ...
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Kali Linux: apt update returns “Hash Sum mismatch” error

I'm experiencing exactly the same issue as described in this question: Kali Linux: apt-get update returns “Hash Sum mismatch” error. Before you mark this as a duplicate however, I have tried the ...
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1answer
378 views

Argon2 Commands in the Terminal

I have been using Argon2 in my terminal (Debian), but I keep messing up, and I have been unable to find the manual or any other documentation that lists examples of commands that work. Could someone ...
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1answer
53 views

Update hash file when rechecking files

I'm currently saving each folder on a hash file with the following code find folder/ -type f -exec sha256sum {} > checksumfolder.txt \; I'm wondering if it is possible instead of checking/...
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Unable to pass argument to argon2 command

According to the manual of argon2 (Debian package), it says to pass the password from standard input. However, when I follow the instructions and attempt echo -n "password" | argon2 salt "...
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1answer
131 views

What encryption mechanism is used to store passwords in `/etc/shadow` in a typical Unix, such as Gnu/Linux?

(From a novice's point of view) The other day I was thinking about how a typical "passwd" command works in a LINUX OS. For example, when we type in "passwd", a prompt appears letting us type in our ...
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1k views

List all keys with SHA-1 in the gpg keyring

After reading a paper about "First Chosen-Prefix Collision on SHA-1 and Application to the PGP Web of Trust", I wonder how many SHA-1 keys are left in specific key rings. How to list all keys in a ...
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How to know if password in /etc/shadow is hashed with SHA or MD?

I want to know my /etc/shadow password hash if its SHA or MD or something else. From what I read, it is related to the $ sign, but I don't have any dollar signs. Im using Ubuntu 16 Example: user:0....
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How do I use GNU parallel to calculate sha256 hash?

Based on this: Simultaneously calculate multiple digests (md5, sha256)? I have a folder that has a large number of files that I want to compute the SHA256 hash for. I used to code segment: #!/bin/...
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1answer
262 views

Automatically verify passwords for classroom exercise? [duplicate]

I'm trying to write a bash script which, among several other things, will "log in" as a user (preferably with su if possible) without needing to interact with the password prompt, i.e., will ...
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How am I able to use the command “sha256sum x.img” “without” a network connection, and get a hash-response?

I am under the impression that sha256sum pings the distro side of things and reads "THEIR" hash file for my .img and gives me that info in a hash-printout in my term. If so, how I am able to get that ...
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285 views

PBKDF2 not the same

I am trying to calculate a PBKDF2 hash, but am getting inconsistent results. Message: Hello Salt: 60C100D05C610E8B94A854DFC0789885 Iterations: 1 Key length: 16 Expected hash: ...

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