Questions tagged [checksum]
70 questions
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Windows Equivalent to `sha256sum -c` (cryptographic hash, digest file, recursive integrity check, SHA256SUMS)
What is the equivalent to sha256sum -c in Windows?
I have a set of very important files that I need to copy-to and mirror across many different types of disks in many geographically distinct locations. After relaying the contents to disk via USB,…
Michael Altfield
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RPM --queryformat FILEMD5S checksum is different than md5sum of machine
The RPM man page says:
The FILEMD5S Tag The FILEMD5S tag is used to display the MD5 checksum
for each of the files that comprise the package.
Array: Yes (Size: One entry per filemd5s)
Used with modifiers: N/A
But when run with, it gives a…
Tanmay Baranwal
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OSSEC Multiple "Integrity Checksum Changed" Alerts
I know this question has been asked several times, but the answers do not seem to work.
After installing OSSEC server on my Ubuntu Server 18.04 LTS machine, I've received hundreds of "Integrity Checksum Changed" alerts regarding files in the…
Leah96xxx
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Why does Linux' cksum command return the path
When running cksum on a file, let's say /tmp/foo.bar, the linux command returns three values: the checksum, the number of bytes in the file, and the path of the file.
Question: Why is the path of the file returned?
Since it is already given to the…
ezdazuzena
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How to verify checksum after copying 2 TB of 6 million files over USB?
I have a situation where I need to move over 2 TB of data from one server to another server in another data center. There are over 6 million files to copy.
The plan is to move data in phases. For example, as the first phase, copy data older than a…
screenslaver
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MySQL Table Checksum - Before or after MySQL dump?
The company I'm currently working for has a script that runs at night that takes a MySQL dump of the production environment and imports it into the staging environment. This is a very basic setup - No replication, no fancy backup or migration…
Justin
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recurring, queryable, cached checksumming of all files in a filesystem
I'm looking for a way to efficiently manage and leverage file-level checksums for all files in a filesystem over time.
Goals:
Configurable, fast refresh - only re-checksumming large files when other criteria indicate a likely change (file size,…
Royce Williams
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How can I replicate Microsoft .NET manifest hashes, ideally on Linux command line?
I have a .NET click-once application which, I found out the hard way (user could not install), checks the checksums of its configuration files against checksums in the .exe.manifest as calculated at build-time.
My user could not install, the error…
Wilbur Whateley
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tars with equal content have different checksums
Given are two directories a/ and b/ with apparently equal content,
$ diff -Naur a b
$
After packing the contents of contents of the directories in to tars,
cd a/ && tar cf ../a.tar * && cd ..
cd b/ && tar cf ../b.tar * && cd ..
I noticed that the…
Nico Schlömer
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FCIV recursive verification on a xml file
Copying files folder to files_copy folder, one wants to check the files were copied correctly. Fciv.exe permits to make an xml database of the original files and then compare it to the copied destination:
Taking an xml database recursively for the…
shkdd
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apt/maven/npm checksum failure on amazon ec2
I'm recently encountering multiple download checksum failures when booting ec2 machine.
This manifests itself with sporadic failures of apt, maven and npm installs.
In one case that the pom checksum failed, I found a Fastly Debug message in the…
Itai Frenkel
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Unable to POST/Upload files to a PHP page
I have a weird problem when I try to post contents or upload files by php to my server.
After submitting the form it sleeps for a while then shows a page loading error. I tried different contents and files with different sizes and found that it only…
Ahmad
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Tools for compare huge number of files in two different server
I have question. Have you ever use any tools that can fast compare the identical of huge number of files (let's say thousands files with total size up to 15 GB) in two different windows 2003 server? I want to make a test see if our backup tools are…
ronin
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TCP: Redundant checksum avoidance specification
TCP provides a mechanism to change the checksum scheme used by the two parties in a TCP session. There are four allowed checksum schemes according to this table, the last being "Redundant Checksum Avoidance".
As far as I understand from this Q&A,…
Randomblue
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how to properly compare the same two large files on two different servers byte for byte?
So I have two servers with the same 10gb gzip file on each.
On one server it unzips fine. On the other there are crc errors. The file sizes are the exact same.
the systems are exactly the same versions of the OS, gzip verson is the same, hardware…
John Ingles
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