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Questions tagged [checksums]

A checksum or hash sum

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1 vote
3 answers
705 views

why there is two identical bash?

I have seen some bash scripts start with /user/bin/bash and others/bin/bash I did a check-sum with cksum 2695035772 1392424 /usr/bin/bash 2695035772 1392424 /bin/bash they look exactly the same, so ...
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0 votes
1 answer
33 views

How does Ubuntu's install CD file integrity self-check work (checksum, corrupt, digest)

How does the Ubuntu Install disk verify its own integrity after boot and before install? I'm very familiar with the process to do a manual check of the integrity of a Linux distro's .iso file with a ...
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0 votes
1 answer
55 views

How to check if 2 directories have the same content

What's an easy way to check if 2 different directories have the exact same contents?
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0 votes
0 answers
17 views

Getting error message "checksums do not match" when trying to install Fairphone Open on my mobile phone

Can you please help me sort this out? I have followed the instructions on https://code.fairphone.com/projects/fp-osos/user/fairphone-open-source-os-installation-instructions.html But can not figure ...
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  • 1
1 vote
2 answers
794 views

Can md5sum check based on just the filename, not the file path

Is it possible to have an md5 checksum file (as generated from somethng like md5sum -r * > checklist.chk where each line contains just the hash and the filename of the file (and not the path from ...
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1 vote
1 answer
490 views

Bad signature on verifying the 18.04.5 sha256 checksum

I was following the "How to verify your Ubuntu download" tutorial to verify the ubuntu-18.04.5-desktop-amd64.iso download. After the following command gpg --keyid-format long --verify ...
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  • 11
0 votes
1 answer
174 views

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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0 votes
0 answers
23 views

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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1 vote
0 answers
693 views

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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1 vote
2 answers
670 views

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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  • 1,725
0 votes
1 answer
186 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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1 vote
2 answers
205 views

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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0 votes
2 answers
919 views

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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0 votes
0 answers
613 views

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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2 votes
1 answer
582 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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0 votes
2 answers
784 views

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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1 vote
3 answers
1k 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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2 votes
2 answers
279 views

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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14 votes
4 answers
33k 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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  • 415
1 vote
0 answers
491 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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1 vote
0 answers
139 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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-1 votes
1 answer
148 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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  • 111
3 votes
1 answer
712 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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  • 157
0 votes
1 answer
559 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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  • 3
0 votes
1 answer
298 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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  • 157
2 votes
0 answers
220 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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  • 1,939
0 votes
0 answers
337 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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9 votes
1 answer
12k 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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  • 10.8k
2 votes
1 answer
1k 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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  • 133
0 votes
1 answer
503 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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2 votes
2 answers
1k 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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0 votes
0 answers
290 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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  • 2,604
0 votes
0 answers
422 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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  • 3,827
1 vote
1 answer
880 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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3 votes
0 answers
32 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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1 vote
1 answer
822 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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  • 1,603
10 votes
6 answers
25k 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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  • 721
0 votes
1 answer
81 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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  • 101
2 votes
1 answer
138 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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3 votes
1 answer
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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3 votes
1 answer
740 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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2 votes
1 answer
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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  • 10.6k
3 votes
2 answers
10k 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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0 votes
1 answer
104 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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3 votes
2 answers
3k 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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7 votes
1 answer
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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4 votes
3 answers
1k 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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2 votes
1 answer
729 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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  • 4,729
1 vote
2 answers
420 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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1 vote
0 answers
596 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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