Solved

File download checksum

Posted on 2008-10-11
4
803 Views
Last Modified: 2012-05-05
I was downloading a fle today and I saw that there is a checksum link where it listed the hash result. Before I google around. How do I check the integrity of the file with checksum? If I want other people to download my file with checksum, how would I do that? I am new to the Unix and open source and I'd like to learn more about the file integrity process. Any tips will be appreciated. Thanks

PS. I use Windows XP
0
Comment
Question by:netdoc01
4 Comments
 
LVL 40

Expert Comment

by:omarfarid
ID: 22695072
try the commands

sum fillename

cksum filename

please see

man sum
man cksum
0
 
LVL 8

Accepted Solution

by:
StrongBad_Rules earned 500 total points
ID: 22695074
A checksum is a form of redundancy check, a simple way to protect the integrity of data by detecting errors in data that are sent through space (telecommunications) or stored for some time. It works by adding up the basic components of a message, typically the assorted bits, and storing the resulting value. Anyone can later perform the same operation on the data, compare the result to the authentic checksum, and (assuming that the sums match) conclude that the message was most likely not corrupted.

Microsoft has a checksum utility here:
http://www.microsoft.com/downloads/details.aspx?FamilyID=B3C93558-31B7-47E2-A663-7365C1686C08&displaylang=en

If you publish data for download, you would calculate the MD5 checksum and then the people that download it can verify that the file is intact be comparing the checksum that they get on their system.  It is useful to make sure that the download is intact and that the user is getting the official file. (when downloading from mirrors, etc.)
0

Featured Post

U.S. Department of Agriculture and Acronis Access

With the new era of mobile computing, smartphones and tablets, wireless communications and cloud services, the USDA sought to take advantage of a mobilized workforce and the blurring lines between personal and corporate computing resources.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Every server (virtual or physical) needs a console: and the console can be provided through hardware directly connected, software for remote connections, local connections, through a KVM, etc. This document explains the different types of consol…
When you start your Windows 10 PC and got an "Operating system not found" error or just saw  "Auto repair for startup" or a blinking cursor with black screen. A loop for Auto repair will start but fix nothing.  You will be panic as there are no back…
This video shows how to set up a shell script to accept a positional parameter when called, pass that to a SQL script, accept the output from the statement back and then manipulate it in the Shell.
Two types of users will appreciate AOMEI Backupper Pro: 1 - Those with PCIe drives (and haven't found cloning software that works on them). 2 - Those who want a fast clone of their boot drive (no re-boots needed) and it can clone your drive wh…

830 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question