Binary File Checksum Error
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and removed. (August 2012) (Learn how and when to remove this template message) Effect of a typical checksum function (the Unix cksum utility) A checksum is a small-size datum from a block of digital data checksum hash for the purpose of detecting errors which may have been introduced during its transmission checksum crc or storage. It is usually applied to an installation file after it is received from the download server. By themselves, intel hex to binary file converter utility checksums are often used to verify data integrity, but should not be relied upon to also verify data authenticity. The actual procedure which yields the checksum, given a data input is called a checksum http://www.linuxquestions.org/questions/programming-9/can't-fix-this-checksum-error-binary-file-my-very-first-question-help-pls-426712/ function or checksum algorithm. Depending on its design goals, a good checksum algorithm will usually output a significantly different value, even for small changes made to the input. This is especially true of cryptographic hash functions, which may be used to detect many data corruption errors and verify overall data integrity; if the computed checksum for the current data input matches the stored value of a previously https://en.wikipedia.org/wiki/Checksum computed checksum, there is a very high probability the data has not been accidentally altered or corrupted. Checksum functions are related to hash functions, fingerprints, randomization functions, and cryptographic hash functions. However, each of those concepts has different applications and therefore different design goals. For instance a function returning the start of a string can provide a hash appropriate for some applications but will never be a suitable checksum. Checksums are used as cryptographic primitives in larger authentication algorithms. For cryptographic systems with these two specific design goals, see HMAC. Check digits and parity bits are special cases of checksums, appropriate for small blocks of data (such as Social Security numbers, bank account numbers, computer words, single bytes, etc.). Some error-correcting codes are based on special checksums which not only detect common errors but also allow the original data to be recovered in certain cases. Contents 1 Algorithms 1.1 Parity byte or parity word 1.2 Modular sum 1.3 Position-dependent 1.4 General considerations 2 See also 3 References 4 External links Algorithms[edit] Parity byte or parity word[edit] The simplest checksum algorithm is the so-called longitudinal parity check, which breaks the data into "words" with a fixed number n of bits, and then
Start here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of http://serverfault.com/questions/615938/is-there-any-reference-for-current-binary-file-checksums-ubuntu-12-04-lts this site About Us Learn more about Stack Overflow the company Business Learn more about hiring developers or posting ads with us Server Fault Questions Tags Users Badges Unanswered Ask Question _ Server Fault is a question and answer site for system and network administrators. Join them; it only takes a minute: Sign up Here's how it works: Anybody can ask a question checksum error Anybody can answer The best answers are voted up and rise to the top Is there any reference for current binary file checksums (Ubuntu 12.04 LTS) up vote 2 down vote favorite I'm using rkhunter to check my system regularly - Sometimes rkhunter output some warnings on file changes (after update e.g.) rkhunter gives me the new file checksum and the old one, but file checksum error is there any reference, where I can check if it's the right checksum? I found some related questions, where a reference for checksums also would help: Correct procedure for RKHunter file changes Rkhunter reports file properties have changed Any ideas? ubuntu checksum rkhunter share|improve this question edited Jul 28 '14 at 12:14 0xC0000022L 82811327 asked Jul 28 '14 at 10:01 kapsi 1113 Some of these tools refer to the hashes found in the (signed) packages you install on the system. What I don't remember is whether rkhunter is one of them. –0xC0000022L Jul 28 '14 at 11:34 no I don't think so, 'rkhunter' just checks, if the files differ from the last check - you also have to use a switch to manually say "it's ok now" (--propupd) –kapsi Jul 29 '14 at 11:37 add a comment| 1 Answer 1 active oldest votes up vote 0 down vote debsums can check package files against a checksum manifest if such was shipped with the package. But as the manifest is on the same system, it is not a valid source in case you get hacked. Tripwire or