Ubuntu :: Checksum - HDD Backup Using DD Over USB
Oct 1, 2010
Using Ubuntu 10.04 on an old HP DV4000 laptop. Trying to do a backup from my laptop's disk to an external USB drive using DD while booted from an Ubuntu boot disk. The laptop's hard drive is not mounted. I was also using a checksum to verify the backup against the hard drive like so:
Code:
$ dd if=/dev/sda of=/media/usbdrive/whatever.img
$ md5sum /dev/sda > laptop.md5
$ md5sum /media/usbdrive/whatever.img > img.md5
Unfortunately over two separate attempts I have not got the checksums to match. However, I have mounted the dd image and retrieved part of the backup from the image, with no apparent corruption. Are there any reasons other than data corruption that could be causing this? I have not tried to restore from said image to see if it "works" (for obvious reasons).
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Sep 8, 2010
I've got a few video files that came with md5's. I want to check them but I don't know how.
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Jul 11, 2011
I'm running 2.6.32-28-generic. I have a raid1 (two 1tb drives with two partitions... one for / and one for /home.) After a power outage, I'm seeing grub complaining about /dev/md0 not existing (ALERT! /dev/md0 does not exist. Dropping to a shell!)
I booted to the latest live CD to have a look around. My dmesg output includes these ominous lines:
Code:
Here is the whole dmesg output: [url]
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Jul 22, 2011
I have a large tarball which is bz2 compressed, and I would like to get a md5 sum of the files contained in it, as I have a separate directory on another server containing what I think are the same files. I want to check to see if the tarballs files are the same as the uncompressed files on the remote server. The files are big 10gb+ so I was wondering if there was a quick way without having to uncompress them all and then md5 them.
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Aug 10, 2010
I have Ubuntu 10.04 and I used my ssh to connect to a webserver. This is the version that I have installed.
Quote:
OpenSSH_5.3p1 Debian-3ubuntu4, OpenSSL 0.9.8k 25 Mar 2009
Apparently the server was hacked using my user and the server admin suggested the my ssh can be tainted.
do a checksum of the ssh, but I cannot find this file on my system.
Code:
md5sum /usr/sbin/sshd
And I will need a md5 hash from a good untainted version and I cannot find that as well on the openssh website.
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Oct 7, 2010
is there a command within ubuntu to create a checksum of a machine after i have installed all of my needed software. i'm interested in this as a defense against rootkits
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Oct 15, 2010
Where can I find the md5sum checksum for Ubuntu 10.10? They seem to keep it hidden.
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Apr 30, 2011
I have problem witch installing larger packages. Small packages works always. Some bigger works after few tries (like vlc-data). Large packages never works (wesnoth-1.8-music 138MB). I checked many mirrors: main, every from Poland and most from Germany. It same on kubuntu 10.10 and 11.04. My ISP doesn't use proxy of any kind. What could be the reason?
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Sep 1, 2011
I am new to Ubuntu and I need to know how is possible to calculate a file's MD5 checksum. Is there also any gui interface?
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Apr 23, 2010
How can I checksum a directory?
Using both cksum and md5sum yields the same error
Code:
root@linux# cksum /bin
cksum: /bin: Is a directory
root@linux# md5sum /bin
md5sum: /bin: Is a directory
[Code].....
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Oct 28, 2010
Using a 10.04 LTS installation disc, fresh are my install Firefox, multiple software, and the software updater thing did not work. Figured maybe I messed something up. I installed 10.04 LTS about 6 times from scratch, no other OS on the system. They all had issues loading software, I click on whatever it goes to launch and nothing ever comes up. I started doing updates through the command prompt using
sudo apt-get update
sudo apt-get upgrade
Then multiple packages broke. Tried sudo apt-get -f install but I keep getting an error that openoffice and firefox fail their checksum. Click on upgrade by 10.10 version gives me the screen that says are you sure, with all the information for the distro and then brings up a window that says download 2 out of 2 and it also crashes. So I figured alright, maybe the CD version I have is messed up. I downloaded the 10.10 iso image and burned it three times. Two of my live cds take me boot me to the purple ubuntu starting screen but nothing is displayed except for a little icon with a keyboard and the disabled person at the bottom. Then my computer reboots it does that continuously.
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Jul 17, 2011
I burned a new disk with ubuntu 11.04 image and I managed to boot the live cd using my external monitor, I've installed and went into my monitor settings, it displays my external monitor as unknown and doesn't even detect my laptop screen. Changing the driver being used in my xorg.conf to vesa allows me to boot properly and ubuntu uses my laptop screen (yet it still detects it as an unknown monitor). Installing any nvidia driver and using it breaks my system. Heres an image of the laptop when using the nvidia driver (btw I can still hear the ubuntu sound that plays when its reached the logon prompt).
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May 18, 2010
using Back In Time to backup my home directory to a second hdd that is mounted at /media/backupThe trouble is, I can do this using Back In Time (Root), but not using Back In Time without the root option. This is definitely a permissions issue - it can't write to the folder, but when I checked by right clicking on the backup directory and looking at the permission tab, it said I was the owner
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May 10, 2011
I install and tested Restore EE Backup server on a test PC with basic configuration and its working fine.
[URL]
The issue i have is where is the location these backup snapshots or files are saving? I want to add a separate Storage to save the backup?
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Jan 3, 2010
This is the first time I have made my own install disks, instead of buying a boxed set. Edmunds Enterprises apparently doesn't sell them anymore. The checksum values are listed on the download site, but how do I compare them with my downloads? My ext3 partition is formatted (blank) awaiting installation, so I will have to do this in Windows, and I don't know how.
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Oct 5, 2010
As everyone know, the checksum of PEC in Sbus is CRC-8, but in my project, the checksum way is zero-checksum, the SMBus read transaction as below.
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Apr 9, 2009
I use wireshark (ethereal) to moniter the traffic passing through the NIC. I find that system always sends "bad checksum" TCP/UDP packets. In CentOS 5.2 this is seldom. Does your system (5.3) send "bad checksum" TCP/UDP packet ?
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Aug 5, 2009
I get the following error on 'yum update'. I have tried 'yum clean all' and also:
rm -f /var/lib/rpm/__db*
rpm --rebuilddb
# yum update
Loaded plugins: fastestmirror, protectbase
Determining fastest mirrors
* base: mirror.sov.uk.goscomb.net
* updates: mirror.sov.uk.goscomb.net
[Code]....
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Jan 19, 2010
I have a scheduled backup to run on our server at work and since the 7/12/09 it has be making 592k files instead of 10Mb files, In mysql-admin (the GUI tool) I have a stored connection for the user 'backup', the user has select and lock rights on the databases being backed up. I have a backup profile called 'backup_regular' and in the third tab along its scheduled to backup at 2 in the morning every week day. If I look at one of the small backup files generated I see the following:
Code:
-- MySQL Administrator dump 1.4
--
-- ------------------------------------------------------
-- Server version`
[code]....
It seems that MySQL can open and write to the file fine, it just can't dump
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Feb 2, 2011
I've tried to google but not much luck. What I would like to do is have anumber of folders on my desktop and their contents, replicated/duplicated into another folder on the same PC in real time. So for example, if I were to change an OpenOffice document in a specific folder on my Desktop it would be replicated/duplicated in real time. If I had three folders on my Desktop A, B and C they would also appear/be backed up (in real time) in a folder called /home/backup. Can this be done?
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Feb 21, 2010
I updated one of my x64 notebooks that has been offline for about a week. There were several updates needed. Towards the end of the update I got a message something about could not complete update because one of the updates was waiting for another process/update to complete.
I verified that it was still trying to update by opening terminal window. After I closed the info box which had a white minus sign it it and reran to check for updates, it said everything was up to date.
How can I be sure that the update in question was applied? Unfortunately don't remember which one. Is there a checksum run at the end of the updates to unsure the update is properly applied? All seems to be working fine.
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Aug 12, 2011
I am trying to install Unbuntu 11.04 on a Via raid 0. I have windows already setup and it boots fine, but Ubuntu does not see the raid set. Running dmraid -ay (or any valid switch with dmraid) returns :
sudo dmraid -ay -v
ERROR: via: invalid checksum on /dev/sdb
ERROR: via: invalid checksum on /dev/sda
no raid disks
mainboard is Asus M2V, with 2x Hitachi 250Gb disks in raid 0 configuration set in BIOS. I have a 3rd hard disk on the onboard Marvell 88SE6121 sata controller but this is not seen at all by Ubuntu either. I was thinking of installing it here if Ubuntu does not work the RAID, but no go it would seem. I do remember installing an earlier version of ubuntu on this very same board using RAID 0 (2x 80Gb drives at that time) and the RAID was reconised and worked fine straight from live cd to full install.
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Jun 30, 2010
does anyone know of a good backup software for Ubuntu 10.4 that will let me select which folders to backup, rather than a complete backup? My install and settings etc can be replaced, but my photos and memories cannot!
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Sep 1, 2011
I have installed Ubuntu 11.04 onto HP EliteBook 8540w notebook and would like to backup the entire disk using some popular backup tool.
I have searched in the internet and found the closest tool is PartImage. But the bad news is that it does not support ext4 fs!
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Nov 4, 2010
I'm getting an md5 checksum error during updating. Using the update manager. I'll post a snapshot.
Screenshot-Changes applied.png (38.46 KiB) Viewed 219 times
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Nov 18, 2009
The CheckSum file I downloaded for Fedora 12 contains a header line indicating the checksums are SHA1 when in fact they are SHA256.
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Dec 16, 2009
is there anyone who checked your downloaded file against the provided key? i have successfully downloaded the Fedora-12-i386-DVD.iso several times, but the SHA1 is not the one in Fedora-12-i386-CHECKSUM is there anyone who has the same problem? the SHA1 i calculated is: 0dc8ed436f0b44874454a379e8de5ad057c0115d
[Code]...
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Feb 7, 2010
I have downloaded both fedora 11 64bit DVD iso and fedora 12 64 bit live cd,but the install failed on a brand new AMD Athlon II X4. The f11 was polite and said there were errors in the media, but f12 displayed an illegible line of text and stopped. On prior installs there was a obvious checksum value to verify that the download was good So far I have been unable to find one. I'd like to verify that the download is good before I buy more crappy cd's that don't work.
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Feb 13, 2010
I have a problem. When I start Yast, and it tries to download the update repository, there is a checksum error. The problem is, that this error is always there, it occured about 2 weeks ago and never disappeared. When I change the update repository to a specific one, I chose a german one, there is still that checksum error. If I say yast I want to still use the repository with the error, there comes another checksum error, if i say i dont care about that one either, it says
Code:
"Download failed:./repodata/primary.xml.gz could not be retrieved from http://download.opensuse.org/update/11.2/Progress:-[DownloadCommand.cc:195] caught EOF from server"
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Dec 28, 2009
I am attempting to do a new install of OpenSUSE 11.2 x86-64 by burning a network install disk. I am having trouble getting it to work on my hardware however. Whenever I boot up with the disc, I get a "image checksum error." I have tried to redownload the image and also reburn it. The disc will boot in VirtualBox but will not boot on the machine. I do not understand what could be causing this because the CD drive in the machine is working just fine.
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