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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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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1answer
122 views

File corruption detection strategy

due to current high price of hdds, I would like to switch from running RAID1 to JBOD + offsite backup (Backblaze). In theory it's a much better approach (if PC gets fried by lighting strike, I still ...
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85 views

Backup solution: hash/checksumming and/or error correction

I'm trying to keep my data well protected with backups, using multiple hard drives (basically swapping the backup disk out every week). For checking validity, I was originally planning on md5summing ...
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1answer
882 views

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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1answer
52 views

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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1answer
964 views

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 ...
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15 views

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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233 views

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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142 views

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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88 views

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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45 views

What is the exact meaning of the QuickSFV comments at the end of an SFV file?

What are the QuickSFV comments at the end of an SFV file based on? 25-Monty_Python-The_End-EOS.mp3 D387716E ;Q1-1c11727069c13b6 ;Q1-///4AA== In version 2 it had a line more: ...
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Verify integrity of a file BEFORE rsync (preventing propagation of bit-rot)

I've got some ideas on how I could craft something together myself using Python and a utility like hashdeep to do this, but I'm willing to bet I'm not the first person that needed to solve this ...
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491 views

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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18 views

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 ...