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2
votes
1answer
45 views

Is there any reference for current binary file checksums (Ubuntu 12.04 LTS)

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 is there any ...
2
votes
1answer
96 views

Is it possible to disable zfs self-healing without disabling checksums?

I would like to disable ZFS self-healing in case of scenario as described here: https://pthree.org/2013/12/10/zfs-administration-appendix-c-why-you-should-use-ecc-ram/ In that scenario bad RAM (ECC or ...
1
vote
2answers
246 views

Check if MySQL Replication is in sync

The MySQL documentation about CHECKSUM TABLE is very minimalistic. My question: Is CHECKSUM TABLE a good way of checking if a MySQL Slave Table is in sync with the master? In other words: Can i use ...
0
votes
0answers
25 views

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 ...
1
vote
1answer
82 views

Does NTFS / Windows as OS performs checksumming on file movement operations by default?

That's what I can't find Does NTFS / Windows as OS performs checksumming on file movement operations by default? alike ZFS or somehow else...
1
vote
1answer
70 views

Check all debian binaries against the checksum of the original

I would like to check all binaries on my server against dpkg -e <path_to_deb_package> <destination> (for example rkhunter could do this check against the originals when doing ...
0
votes
2answers
242 views

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 ...
-2
votes
4answers
329 views

Why is the TCP checksum inverted?

From the Wikipedia page: The checksum field is the 16 bit one's complement of the one's complement sum of all 16-bit words in the header and text. Why, after summing the 16-bits in the header ...
0
votes
1answer
365 views

Tools for compare huge number of files in two different server [closed]

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 ...
2
votes
1answer
248 views

Is it possible to access the ZFS checksums to compare files

I have a FreeNAS 8 machine (FreeBSD 8.2-RELEASE-p1) with two different shares on it. I'm migrating files from Share1 to Share2. The Shares have different directory structures and naming conventions. ...
5
votes
1answer
2k views

How to get checksum data integrity on ext4?

On file systems like btrfs you can preform a scrub, which will go though all the data to see if the data still matches the file system checksum. I would like to check the data on ext4 if it is ...
0
votes
1answer
54 views

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 ...
1
vote
2answers
712 views

Is the TCP checksum over the payload?

I was somehow convinced that the TCP checksum was a header checksum (similar to the IP checksum), but I'm now having doubts reading the Wikipedia article: The checksum field is the 16 bit one's ...
-1
votes
1answer
106 views

MD5 for Git's git-credential-osxkeychain executable? [closed]

This question copied over from Super-User, where it was apparently unwelcome. Anyway, asked and answered: I'm setting up a GitHub account and have downloaded Git's git-credential-osxkeychain ...
2
votes
1answer
397 views

Gzip command to produce exact same output than tar -cvzf?

I did thought the following commands where equivalent, but they produce different checksums: tar -cvzf ... and tar -cvf ...; gzip ... does not produce the same output. sha1sumdiffers. What would be ...
1
vote
3answers
971 views

Install Java EE 6 on CentOS 6

Having problems installing Java EE 6 in CentOS 6 x32. I have removed all previous version of Java and freshly installed temporally jdk1.6.0_34. So my $PATH variable goes to: ...
0
votes
1answer
102 views

Rsync backups: checksums don’t match

I am a little confused by this although diff –rq dir/ dir1/ does not show a difference This rsync is to backup the directory rsync -avrREz --delete --links -e "ssh -l user" --delete dir/ ...
2
votes
2answers
511 views

Checksumming mysql replicas over ssl

After hours of struggling to understand the way percona toolkits (2.1) pt-table-checksum works, I try to try you. Situation Running MySQL replication (Master-active:Master:passive) Slave user is ...
3
votes
1answer
1k views

huge packet loss and checksum errors

Our 2008 server began to work very slowly within 2 weeks. Our web sites (iis 7.5) are loading very slowly and sometimes its freezing. We began testing with wireshark and saw that our packets are ...
1
vote
2answers
136 views

Network boot (PXE) and caching of files

I'm looking into changing how to deploy network boot for clusters of servers. My worry is network transfer since not all boxes will be close to boot servers and network might be slow. The machines ...
3
votes
1answer
180 views

What would cause a successful file transfer to have checksums not match?

After very large file transfers (this only happens with 10gig+ files) to a specific system, the receiving system would have a mismatched checksum of the file. The transfer seems to have happened ...
0
votes
1answer
184 views

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 ...
0
votes
2answers
458 views

Windows checksums?

I am looking for a official source for windows checksums (in my special case windows xp). Normally I use the "Microsoft Benefit Portal" for that, but seems like it's gone, at least I can't find it ...
3
votes
1answer
979 views

Checksumming to verify rsync transfers

So rsync runs some checksums in the course of deciding what to transfer (i.e. what blocks within a file). But is there any reason to trust the file you end up with on the receive side any more than ...
3
votes
2answers
8k views

CentOS 6 on Hyper-V - network adapter doesn't work (no checksum feature)

I have installed CentOS 6.0 on Hyper-V Server 2008 R2 SP1. VM has only synthetic network adapter enabled. Installation was successfull (without any network), then I installed Linux Integration ...
1
vote
2answers
749 views

sqlite.bz2 File does not match checksum - centos 5.7

I have tried absolutely everything, without good results... yum always fails with "sqlite.bz2 File does not match checksum" for different repositories, every single time, but always with the above ...
2
votes
2answers
2k views

SCP - Is a checksum required?

I'm backing up and transferring files automatically each night via scp. I realize I get packet-level checksums via the protocol itself, but I'm wondering what the best practice is to ensure that a ...
7
votes
1answer
9k views

Too many incorrect checksum errors in TCPDUMP

I find too many incorrect checksum errors from a TCPDUMP done on a GNU Linux 64bit server. There are close to 50% incorrect chekcsums in the export? cksum 0xe61f (incorrect (-> 0x8c37) How can we ...
1
vote
1answer
128 views

Windows 2003 Std server sending ip packets with checksum 0

So I was just doing some server side troubleshooting on the network I noticed that 1 of the servers sends all packets with the IP level checksum set to 0. It caught my eye because in my wireshark ...
1
vote
1answer
95 views

MediaWiki panic after modifying a file. Checksums maybe?

I've recently installed the latest version of MediaWiki on a dev server. I wanted to add some information on the edit page, and for this needed to modify an existing .php file to add in some more ...
2
votes
2answers
489 views

daily rsync backups with hard links, checksums, and a new computer

I backup my laptop to a Fedora desktop daily using rsync with hard links. This has worked great for almost a year. I recently purchased a new computer, transferred over my data, and would like to ...
0
votes
1answer
178 views

how i can read n first bit command output in windows batch file?

i use checksum command in my batch file and the output of command as follow : 69514a29dc44cd83b42658e917ed9baf *file.txt i want to return checksum only so i should store it in variable without ...
0
votes
3answers
169 views

UDP pseudoheader

Is it true that in the UDP header 2 bytes store a checksum for verification purposes by the destination host, and that this checksum is generated from a pseudoheader? If this is true, then why does a ...
2
votes
2answers
2k views

How to enforce rsync against performing checksum?

We perform nightly backups of a Windows file server by first creating an incremental backup file on the server each night (as well as a complete backup on Thursday night), and then copying that to a ...
0
votes
1answer
52 views

need help on extracting a file when checksum matches

I need a help on untaring a file when checksum matches. Here is the scenario. i have a tar file and its check sum is dfsafdafsafasfsaf232, stored in a checksum file and need a script to match this ...
0
votes
2answers
2k views

File is possibly corrupt - Checksum error when installing Win7

I've just built a new dev server. I am putting Windows 7 on it as I don't have a Server license and just picked up an OEM W7 Pro license. I am getting the message: The file is possibly corrupt. The ...
3
votes
1answer
785 views

File corruption (bad checksums) in large files copied to VMware guest

In setting up a development lab, I've got a desktop system running ESXi 4.1.0 (free license) on SATA RAID 0 (already purchased and configured when I started this job; I'm open to hardware input as it ...
2
votes
4answers
2k views

Is there a generic filesystem checksum tool for Linux?

EDIT: clarify context I have several loosely synchronized filesystems on different machines. (some content is redundant, some is not, things get moved by hand by the users). These are large ...
2
votes
1answer
1k views

Does DisableTaskOffload disable all related LAN Adapter settings?

I have been getting problems disabling Checksum Offload in a lot of LAN adapters manually. Does setting the DisableTaskOffload value in the registry disable all of the related parameters regardless of ...
2
votes
2answers
127 views

How can I verify the integrity of a WAN connection?

We have two scanners in our branch office which upload images to the head office via FTP. In the last week, both scanners have started delivering a lot of corrupted images. I suspect that the problem ...
11
votes
3answers
6k views

Creating a tar file with checksums included

Here's my problem : I need to archive to tar files a lot ( up to 60 TB) of big files (usually 30 to 40 GB each). I would like to make checksums ( md5, sha1, whatever) of these files before archiving; ...
0
votes
4answers
339 views

Win32 software to sync a file system to a FTP server using checksums?

The simple question is how do you sync a Windows file system to an FTP destination periodically while never checking the destination for change unless something bad happens and not relying on file ...
22
votes
6answers
714 views

How do I prove two files are the same legally?

We had someone steal some files before quitting and it has eventually come down to a lawsuit. I've now been provided with a cd of files and I have to "prove" that they are our files by matching them ...