Questions tagged [checksums]
A checksum or hash sum
77
questions
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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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21
votes
6
answers
135k
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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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14
votes
3
answers
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Generate SHA, MD5 and other checksums from properties menu (added "Digests" tab)
I am trying to restore a function that I had on my last box. It added a tab in the properties menu of any file called "Digests". From there I could choose any/all of the hash formats, click hash and ...
Chuck
13
votes
1
answer
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MD5 hash for ubuntu .iso (14.04 through 18.10)
I cant find the MD5 hash for ubuntu-14.04.1-desktop-amd64.iso on this website.
Am I looking in the right place?
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11
votes
6
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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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9
votes
1
answer
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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 ...
- 12.4k
7
votes
1
answer
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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
...
user364819
6
votes
2
answers
3k
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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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6
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4
answers
3k
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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 ...
- 1,268
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"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 ...
4
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3
answers
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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 ...
user364819
4
votes
1
answer
3k
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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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4
votes
0
answers
2k
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Where are the instructions for checking md5 checksums? [duplicate]
Possible Duplicate:
How can I check the integrity of a downloaded Ubuntu CD?
Where do I find instructions for making sure the Ubuntu ISO I download is correct?
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3
votes
3
answers
844
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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 ...
user1595720
3
votes
2
answers
4k
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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3
votes
1
answer
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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 ...
- 31
3
votes
2
answers
5k
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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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3
votes
2
answers
2k
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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 "...
- 3,450
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1
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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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2
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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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3
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1
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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=/...
- 87
3
votes
2
answers
159
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How can I validate an installation DVD?
I have downloaded an Ubuntu ISO and burned it to DVD. While installing from the DVD onto VirtualBox I got an error which suggested either the HDD or DVD or overheating were the cause. I am ...
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3
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0
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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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2
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2
answers
2k
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is there a simple way to check a live CD for errors?
I was trying to use 2 methods "HOWTOMD5SUM" and "HOWTOSHA256SUM", but they are all way complicated for a newbie. Is there an application that could do the same in a simple way? I've already tried "...
- 11k
2
votes
3
answers
2k
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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 ...
2
votes
2
answers
370
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 ...
2
votes
1
answer
2k
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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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2
votes
1
answer
193
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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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1
answer
844
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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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2
votes
2
answers
145
views
What (apart from Software Updates) can update system executables?
When the Software Updater pops up with some updates to install, I run rkhunter just before applying them, as a check that my installation is clean. When done, I update rkhunter's file signatures.
...
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2
votes
2
answers
1k
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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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2
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1
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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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2
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1
answer
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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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1
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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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2
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0
answers
695
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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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2
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0
answers
285
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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 ...
- 2,439
2
votes
1
answer
2k
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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 ...
- 11k
1
vote
2
answers
492
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
2
answers
321
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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?
1
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1
answer
2k
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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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1
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1
answer
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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 ...
- 32.9k
1
vote
1
answer
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14.04.1 md5sums
The official checksum page only goes until 14.04. Where can I check my 14.04.01 download (119cb63b48c9a18f31f417f09655efbd)?
- 196
1
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1
answer
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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 ...
- 9,513
1
vote
1
answer
187
views
How can I find out if Nautilus uses copy/move validation?
Normally I use rsync or rdiff-backup to copy or move large amounts of files around with validation activated.
I don't know if Nautilus uses some kind of verification on copy or move commands.
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2
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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
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1
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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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1
vote
0
answers
1k
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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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1
vote
0
answers
187
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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 ...
user589917
1
vote
0
answers
931
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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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