Questions tagged [checksums]

A checksum or hash sum

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24 views

ISO image changes after it has been booted from

I wrote lubuntu-20.04-desktop-amd64.iso to a USB flash drive that I had previously overwritten with random data, and then I successfully verified it using this script: # head -c $(stat -c %s lubuntu-...
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Is the MD5 checksum for 18.04.1 image available?

Last night I downloaded via torrents the disk image ubuntu-18.04.1-desktop-amd64.iso . Downloading via the official website was taking too long and but using torrents allowed me to download the image ...
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Checksums via HTTP and not HTTPS

I'm concerned that Ubuntu checksums are provided via http and not https server. I'm storing a number of iso images and time to time I run a checksum script that validates my images against the ...
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How to bypass Hash Sum check for apt-get update

I have ubuntu 16.04 based vms and dockers using mssqlserver driver 17. Installed the classic way curl https://packages.microsoft.com/keys/microsoft.asc | apt-key add - curl https://packages....
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Check sum error when extract files

I'm using Ubuntu 19.04 I was trying to extract some files. all the files were downloaded from internet. size is about 500 MB to 1.5 GB. all the time it is appearing "Checksum Error" what can do to ...
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How to verify Clonezilla Checksum?

I have downloaded Clonezilla from here. Now I want to verify the Checksum of the downloaded file using these instructions. But my file name is clonezilla-live-20190903-disco-amd64.zip, which is ...
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1answer
46 views

Compare and rename duplicate files between two folders

For example: I have 2 folders: one and two. What is the command or script to do the following tasks: Check sha256sum of all files in one (and its subfolders). Then write their checksums in one.txt. ...
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Uniquely identify a debian package

I see three checksums in a .deb package: md5sum sha1 sha256 Why do we need 3 checksums? Can we use any one of these to uniquely identify a Debian package?
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2answers
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Permission denied running sha256sum. How do I check the iso files?

When I run: sha256sum -c SHA256SUMS | grep OK Output: sha256sum: ubuntu-18.04.2-desktop-amd64.iso: permission denied sha256sum: ubuntu-18.04.2-live-server-amd64.iso: no such file or directory ...
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Unable to download checksum files (SHA256SUMS), they just open a text window on firefox. How do I actually download the files?

I'm trying to verify the iso file I've downloaded, but I can't download the checksum files from http://releases.ubuntu.com/bionic/. When I press the links they open as another tab on firefox.
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271 views

Ubuntu Server 18.04.2 HWE kernel: ./boot/grub/efi.img file failed the MD5 checksum when booting UEFI

I downloaded Ubuntu Server 18.04.2 (classic installer) and put it on a flash drive. I then ran the integrity check and all was well. But then I realized that I wanted to install the HWE kernel. After ...
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Unable to Checksum on Windows with Bash

Okay, my level is this - I don't know what Bash is, but I think I am using it because the tutorial told me to... https://tutorials.ubuntu.com/tutorial/tutorial-how-to-verify-ubuntu It then told me ...
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535 views

BAD signature when trying to verify SHA256SUMS for Bionic Beaver ISO

I am attempting to verify my download of Bionic Beaver on Windows 7. I feel like I am missing something very obvious. I went to http://releases.ubuntu.com/bionic/ and clicked on both SHA256SUMS and ...
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Is there a way for a casual user to verify the authenticity of a downloaded Ubuntu .ISO?

I'm quite surprised that an issue this big has so little conversation around it. I'm a casual Ubuntu user, and I just downloaded the ISO from ubuntu.com. I don't have a PGP web-of-trust set up on my ...
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1answer
8k 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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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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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
105 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
371 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
495 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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128 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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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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281 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
10k 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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1answer
744 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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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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405 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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677 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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225 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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153 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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On the ubuntu download server I'm getting permission denied trying to see the sh256 sum for the iso download [closed]

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
710 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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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
569 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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14k 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
66 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
62 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
2k 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
544 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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2answers
7k 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
95 views

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

When I started the download for 14.0.4.3 32-bit 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 ...
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2answers
2k 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
928 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
524 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
385 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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372 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
1k 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 ...