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Questions tagged [checksums]

A checksum or hash sum

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45 views

When I was using Rufus to create a dual boot, this happened

When I try to use Rufus this happens, please help
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1answer
25 views

Create checksum sha256 of all files and directories?

I need to create a list of checksums of the files that are inside a directory, including any subdirectories. The command that I try to execute is the following: sha256sum -b * Usage: -b = Read ...
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11 views

CMOS checksum error and BIOS reset upon waking from suspend (HP Stream 14)

first post/first time asking anything in any forum ever! The only other existing post about my issue ( Ubuntu 18.04 on HP Stream 14 - Suspend Produces Checksum Error ) doesn't help much. :( I'm ...
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0answers
39 views

Create Tar On Ubuntu And Mac With Same MD5

I have a folder of files which I am trying to tar into an archive. I have the same files on a Mac and on a Ubuntu machine. If I run an rsync it shows that the directories are the same, but if I tar ...
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1answer
33 views

Ubuntu releases .iso torrent SHA wrong

I have downloaded ubuntu-16.04.1-desktop-amd64.iso and ubuntu-16.04.5-desktop-amd64.iso using a torrent client transmission. ubuntu-16.04.5-desktop-amd64.iso was downloaded from the ubuntu downloads ...
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1answer
94 views

SHASUMS AND grep in verifying Ubuntu download

I'm trying to better understand the use of "SHA256SUMS" and "grep." The Ubuntu verify and authenticate tutorial uses the following term: "sha256sum -c SHA256SUMS 2>&1 | grep OK" to verify the ...
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1answer
259 views

DHCP Discover ethernet frame check sequence incorrect

I did apt dist-upgrade on Ubuntu 18.04 LTS. After that I have broken dhclient. I can't get ip address from my ISP DHCP server. However Ubuntu gets IP from my dlink router. Static configuration works ...
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1answer
67 views

Same HASH value, different files - empty strings

Edited question for posterity: The reason my resulting hash values were the same is that the I'm computing checksums of two .iso files which contain "empty strings." I attempted to verify two ...
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0answers
50 views

sha256sum of image on dvd doesn't match to original ISO

I tried to check sha256sum of ISO after it was burn on DVD I used this command and got result that differs from original ISO's check: dd if=/dev/sr0 | sha256sum Does it mean that it was written ...
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0answers
83 views

Ubuntu LiveUSB kernel panic

I successfully booted into the 18.04 Live USB, but any time I select an option, including "Check disk for defects," it spits an "End kernel panic" error. Any fix for this? PS: I did download another ...
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1answer
4k views

Where is the Checksum for Ubuntu 18.04?

Where is the checksum for the Ubuntu 18.04 Desktop ISO image (ubuntu-18.04-desktop-amd64.iso)? I don't see it anywhere on the download page or on the release notes page. The Checksums on the cd ...
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0answers
38 views

How can I check iso hash on a USB stick? [duplicate]

I have to check the sha256 hash on a iso written on a usb stick. I have tried with: sha256sum /dev/sdc and with: sha256sum /dev/sdc1 but they don't match the right hash. I wrote the iso with a ...
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1answer
289 views

What packages in Ubuntu repositories provide BLAKE2 sums on 16.04?

I am looking to calculate BLAKE2 hashes for files on my Ubuntu 16.04 machine. I would like something similar to md5sum or sha512sum for BLAKE2, however have not found a package in the Ubuntu ...
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0answers
19 views

Sha256/ISO verifications: different methods, different results [duplicate]

I’m trying to verify Ubuntu 16.04.3 (64-bit) ISO. (I’ve checked 5 different images: 4 Ubuntu and 1 Xubuntu. For my verifications, I’m using Lubuntu 16.04(32-bit) installed on a quite old machine.) ...
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1answer
333 views

What is the checksum value for kubuntu-16.04.3-desktop-amd64.iso?

Running WinMD5Free v1.20 said it's not matching current 8d8413fe8d7ca81bdab86180e8d5386e What is the checksum value for kubuntu-16.04.3-desktop-amd64.iso?
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2answers
252 views

Search file with known sha1 sum

I have to find specific file with known sha1 sum. I know in which folder the file should be, but there are sub-folders (up to max-depth 4). I know more or less parts of filename (contains words "...
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123 views

File move & copy utility that compares files after copying, preferably Total Commander-like

I particularly like the feature of Total Commander, that while moving or copying files it can verify whether the files were actually correctly copied and the copies match. Here is the list of Total ...
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0answers
73 views

Unable to get the same checksum value for a copied file

UPDATE 1: Attempted rsync as suggested by Jos: $ cd /media/oshirowanen/ $ rsync -avv HDD1/file.iso HDD2/file.iso sending incremental file list delta-transmission disabled for local transfer or --...
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0answers
34 views

On the ubuntu download server I'm getting permission denied trying to see the sh256 sum for the iso download

It looks like there is an issue with the ubuntu webserver, the sha checksum files are not available on the ubuntu site when I try to verify my download. Does anyone know where I can see the sha ...
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1answer
452 views

Cannot mount external HDD because of checksum error on a specific file

I'm getting the following error when trying to mount my external HDD. How to solve such an error? I gave a quick search, but didn't find anything helpful yet. Getting the same error if I try to ...
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0answers
24 views

What practical options does Ubuntu have to make daily personal backups? [duplicate]

To protect my personal data against sudden hard drive failure, I basically began mirroring my internal drives to an external hard drive a while ago. I do this regularly with all of my data partitions, ...
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1answer
366 views

How to make Ubuntu to show a notification when there is a btrfs checksum failure?

Like aa-notify, which shows a notification on my desktop when AppArmor denies something.
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6answers
6k views

Can two different firmware files have same md5 sum?

Can two different binary files have the same md5 sum? One binary firmware file have different version number and marked as revised, small bug fixed. But both files have same md5 sum, I would assume ...
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1answer
57 views

Verifying a large directory after copy from one hard drive to another [duplicate]

I have a home file server that I use Ubuntu on. Recently, one of my drives filled up so I got another and threw it in there. I have a very large folder, the directory is about 1.7 T in size and ...
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1answer
49 views

Checksum a group of folders to another group of folders using md5sum

I copied three folders from three different directories. I want to check the copies over the originals with checksum. Is this possible in the command line?
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1answer
1k views

Understanding `cksum` command output

When I run the command cksum I get the following as output 2836376023 36 myfile.txt I understand that 36 is the size of the file followed by the name of the file But I would like to know the ...
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1answer
294 views

How to use the update function in 'rhash'

I'm having trouble using 'rhash' to update an existing file containing md5 checksums on Ubuntu server 14.04. Here is my script: #!/bin/bash sudo rhash -r -u --md5 /checksum/these/files --output=/...
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1answer
2k views

Are there any know errors in the Ubuntu 16.04 bootable USB sticks that we create with the disk creator?

I have just created a bootable USB stick with the new ubuntu 16.04 iso. The md5 check gives me that everything is fine with the iso I make it from, but when I check for errors on the USB pendrive. I ...
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1answer
5k views

Ubuntu 14.04.4 – “Check for defects” – “Errors found in 2 files”

First off... First off, I've already searched Ask Ubuntu and found multiple other questions[1] [2] [3] [4], but a) most of them don't fully fit my circumstances, and b) the ones that do haven't been ...
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1answer
78 views

Looking for the checksum for Ubuntu 14.0.4.3 32bit [duplicate]

When I started the download for 14.0.4.3 32bit I didn't find any obvious link to a list of checksums. I'd suggest that site management add that information. in the meantime can someone point me to the ...
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2answers
1k views

Generate a separate .md5 file for each .fastq file in a directory?

I am trying to generate separate .md5 files for each .fastq file in a directory. I found solutions to generate a single .md5 file for many files, but this is not what I am looking for. I have file1....
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1answer
2k views

Should I be worried about “warning: checksum areas are greater than image size. Invalid section table?” messages during kernel upgrade?

I just ran the command sudo apt-get dist-upgrade and this was the output: Reading package lists... Done Building dependency tree Reading state information... Done Calculating upgrade... Done ...
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3answers
637 views

How to automate the process of checking an Ubuntu ISO SHA256sum

I know that I can get the SHA256 sums (and MD5 sums) from http://releases.ubuntu.com/ as they are provided now within the folders, but is there any way of automating the checking process so that the ...
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1answer
411 views

Nautilus script to compare hash values of two files

Sometimes I need to check if two files are identical. I attempted to make a bash script to achieve that but I can not make my head around it. I found below script on the net, I placed it in Nautilus ...
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2answers
314 views

Check for redundancy before downloading any file

Is there a way you can check whether you have already downloaded a file previously or not before actually downloading it. I know - wget can do that, only if the filename of the file trying to be ...
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0answers
274 views

After Downloading with wget, Cecksums Hashes are different with original file. Is re-downloading the only way to repair?

It was a tar.gz archive (eclipse-java-luna-SR1a-linux-gtk-x86_64.tar.gz) and was downloaded 100% due to wget-log. Is there any way to recover this file without re-downloading? The size of local file ...
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2answers
3k views

MD5 checksum not matching

I just downloaded ubuntu-14.04.1-desktop-amd64.iso from the official website and ran a MD5 checksum d2b966f36e76486ff4c83fb085557f97 which doesn't match any of the MD5 checksums listed at http://...
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1answer
721 views

md5deep create checksum for directory with relative paths

How do I create checksum for a directory with md5deep, for checking duplication in another location? For example: I want to create checksum file for /home/user/Documents and I want check duplicate ...
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1answer
586 views

How to generate sha1 hashes of a whole dvd?

How can I generate one text-file containing all sha1 hashes of all files on a dvd with many folders and subfolders?
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1answer
355 views

MD5 of official Ubuntu downloads NEVER match

I have tried to download the 14.04.1 and 14.04 versions of Ubuntu serveral times from different mirrors on different PCs/Laptops using Firefox to download from the site and BitTorrent to download via ...
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1answer
146 views

How does the ubuntu Live CD check itself for defects?

One of the options when you boot up the CD is to check itself for defects. How does it do this? Surely there could be a defect that gives a false positive? Or is that incredibly unlikely - does it use ...
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1answer
56 views

Easy way to create an installation USB

Unetbootin and other scripts are too much of a hassle, and dd is just plain scary. How can an unenlightened user like me create an Ubuntu installation USB using intuitive, colorful graphical tools?
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1answer
599 views

14.04.1 md5sums

The official checksum page only goes until 14.04. Where can I check my 14.04.01 download (119cb63b48c9a18f31f417f09655efbd)?
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1answer
2k views

MD5 says the checksum is correct but still “Check finished: errors found in 2 files”

I'm attempting to dual boot windows 8.1 and ubuntu but I can't quite seem to create a USB boot drive without errors. Twice now I have downloaded ubuntu-14.04-desktop-amd64 from the official website, ...
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2answers
632 views

Recursive Checksumming

I've been using the following command line to do recursive checksumming of directories. It seems to get the job done, but still being a newbie I've been wondering, are there any potential problems ...
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1answer
2k views

“The ./boot/grub/efi.img file failed the MD5 checksum verification.”

Related question: Why does integrity check fail for the 12.04.1 Alternate ISO? I downloaded and wrote ubuntu-12.04.3-server-amd64.iso to a USB key, but when I boot from it and select "Check disc for ...
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4answers
2k views

Is there a checksum utility equivalent to Hashtab for Windows?

I use Hashtab in Windows to compute the hash of a file. All I have to do is right click on the file, click properties and in the properties menu there would be a tab called Hash and it contains the ...
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2answers
2k views

Better solution to a wrong md5 checksum

Sometimes, while downloading the ISO installation file, it may get corrupted on the way and becomes unfit for use. One possible solution that I know to deal with this problem is re-downloading the ...
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4answers
60k views

How to check crc of a file?

I was looking this question and appears everything but crc. Is there a good Ubuntu way around there to do this?
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1answer
2k views

is there a way to ignore checksum error?

I have downloaded installer of Mathematica from it's website but checksum does not match and i can't install it. Is there any way to ignore checksum and install it anyway?