Questions tagged [checksum]
A checksum is a value created from a binary file that can be used to validate its authenticity and integrity. An example of a checksum is MD4, MD5 and SHA-1.
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What are the most reliable attributes for comparing two files in order to confirm/verify they are 100% identical?
I had the following situation:
I copied 5.5 TB worth of data (in total over 100,000 directories and 10 million files) from an old disk to a newly-purchased external disk.
I used Ultracopier on ...
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netflix stall via linux iptables nat, tcp checksum errors (with workaround)
I've been trying to track down this problem for several days. I still haven't worked out what is going on, or how to fix it properly, but I do have a workaround.
Problem summary
Netflix stalls when ...
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Thinkpad T410 not booting: Simple solution?
I have a Lenovo Thinkpad T410 which I left outdoors overnight after a BBQ... No rain but likely some humidity.
Symptoms?
- Initially, screen remains black, nothing happens upon pressing power button....
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Unable to update Bios in Lenovo T61 due to damaged battery - What is the way to bypass this issue?
I would like to update bios on my T61 but unfortunately battery died back in the stone age. The whole notebook is a Dual core T7100 1.8 Ghz Centrino Duo without Nvidia graphic card (it has intel ...
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Is it possible to check a FLV for data corruption?
I have some FLV videos and I'd like to check them for possibile data corruption, even if I'm able to play them without problems. I don't really know if FLV videos store an embedded checksum string for ...
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How reliable is diff?
I copied a large directory from one volume to another (using rsync) and subsequently wanted to check whether the copy was indeed correct to verify the integrity of the data. To avoid the lengthy file ...
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Does it make sense to add checksums to archived data?
We want to archive some data for long term storage on optical media (M-Disks).
Does it make sense to create checksums for all files beforehand and burn them alongside the data onto the M-Disks?
This ...
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How to checksum a SquashFS filesystem on partitionless HDD
# lsblk -f /dev/sda
NAME FSTYPE FSVER LABEL UUID FSAVAIL FSUSE% MOUNTPOINT
sda squashfs 4.0
# mount -v /dev/sda /mnt
mount: /dev/sda mounted on /mnt.
$ df -B1
Filesystem 1B-blocks Used ...
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Get checksum over http or ftp
I am looking to provide a upload feature for my application that accepts a uri like http or ftp, which would be downloaded by the server and stored. I know that the files uploaded would be large (>1GB)...
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how and why do "cpgz" files appear out of regular zip files?
for some reason under Mac OSX HIGH SIERRA I have noticed that once functioning .zip files are turning up with "cpgz" at the end of the file.(funny_movie.zip.cpgz) I have a feeling it has something to ...
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Windows 10 corrupts FAT partition checksum
I have a FAT16 partition (primary) that takes a total of 10.00MB of a standard USB drive. The rest of the space on the USB drive is unallocated so this is the only parttion I have there.
When I plug ...
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How does rclone perform remote checksum, and what is its effect on bandwidth?
I'm trying to store photos on amazon cloud drive using rclone, and whenever I upload a batch of photos, both my upload and download spikes as reported by my ISP. So if I upload 75 GB, my monthly ...
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How to batch delete files based on their checksum matching an existing list of checksums
I'm looking for a means of deleting files based on their checksum matching a list of previously seen checksums in a text file or some other list.
The context is a large photo organization project ...
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How do I check integrity of a file from DreamSpark?
I have a very unstable connection and it cut off multiple times while downloading Windows 8.1 using Microsoft's SDM, so I'm kind of concerned to how I can check to see if the file is still intact once ...
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Window Vista cannot create new folder, note, etc when right click and recent items forever empty after crashes
Basically my computer crashes and after I reboot I got a checksum error, so I reboot again and these problems appears:
1):Unable to create new folder, notes, zip file,etc. (when I right click in ...
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Cannot open an encrypted file on OS X
I cannot decrypt files on OS X (10.6.8 and 10.8.2) which I have encrypted on Ubuntu (10.04) using ccrypt. As a similar problem, I have a password file created with KeePassX. I just cannot open it on ...
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I want a minimum value in a cell only if there are values entered entered
=MAX(150,SUM((D3+E3)*2))
is what I use but I don't need it to fill if values are not entered in D3 and E3
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Is a file Overlay a security threat?
How do you tell if the "Overlay" found on some files when searching the hash checksum on VirusTotal poses any threat?
Would the Overlay be part of the signed file? Does the VT page ...
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Is downloading a media file twice and comparing their hash values enough to verify their integrity?
I often use youtube-dl to download videos. As far as I know, there is no data integrity verfication built in to youtube-dl, so what I do to verify that a video isn't corrupted in some way after ...
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How to total 2 cells = Take the value in Cell A and if Cell A is blank then take the value from Cell B
Cell A Row 1 = 100
Cell B row 1= 100000
Cell C Total should be = 100
Cell A Row 2 = 0
Cell B Row 2 = 45000
Cell C Row 2 = 45000
Total of Cell C1 + C2 = 45100
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Impact of Enabling UDP Checksum (IPv4) on the System
AFAIK, UDP checksum is an optional feature on IPv4.
I want to enable it on a gateway (IPv4), but I want to know if it has any negative impact on the system, e.g., increasing CPU utilization or ...
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CheckSum error, cannot boot
I was watching a video on my Acer Aspire laptop when I accidentally hit it on the left side of screen with my leg, the hit was very minor. But just after the hit the video stuck and started giving a ...
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Shell script, AppleScript Mac OS X
I’m trying to copy embedded metadata from image files and write to a .txt file, as well as generate MD5 and SHA1 checksums for the same images to be added to the same .txt file.
I can run this ...
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Video upload checksums not matching
We have a setup that takes a small quantity of small video uploads directly from people's mobile phones using apps, onto a small VPS. It rejects them if the MD5 checksum on the phone doesn't match the ...
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How to do checksum on web hosting site?
I am having problems uploading a large file to a web site.
When the file is subsequently downloaded it is corrupt.
How can I do a checksum of the file while it is on the web site so I don't have ...
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KDE on Windows won't download/install
No matter which mirror I use, I get this error. I've tried a few times over the last several weeks.
Download failed
---------------------------
The download of ftp://kde.mirrors.tds.net/pub/kde/...