Ubuntu Security :: Restore The Original Image File That Have Hidden Data In With Steghide
Jan 27, 2011
i'm wondering if it's possible to restore the original image file that you have hidden data in with steghide. The basic Idea is you have a photo using gpg sign it and then embed the signature. then remove the signature at a later time and check it with the signature. I hope another "inverse" algorithm doesn't need to be written to undo the first (if a "inverse algorithm is possible). This assume you already have the pass phrase or that there is no pass phrase. I already know how to retrieve the original file just want to remove the hidden data from the Image and restore it's attributes.
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Jul 25, 2010
Looks to me like we're a baby-step behind Windows in not having GUI wrappers or frontends for the steganography (?) binaries I mentioned above. Or have my searches just not turned up the obvious GNOME solution?
Also, can someone tell me exactly what image file format works in login screen face lists, in place of the "generic user" icon one? And is there a command-line workaround to get unique ones assigned per-user? The "Login Window" utility in Ubuntu 9.10 seems a bit insistent on using the same image and path to images for all user icons -- hardly a user-friendly way of making user A's identifying icon different from user B's.
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Feb 16, 2010
is it possible some badware file were hidden and couldn't be observed in folders or removeable devices..?and how could we hidden file (like windows)..?
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Feb 28, 2010
They were controlled by BIOS for start-up without problem.Just wiped out Fedora and installed Ubuntu 9.10 64bit. During installing GRUB I saved it on Master, IIRC.Now Ubuntu and Vista startup are controlled by boot loader. I have to start Ubuntu first and on kernel selection select (loader)(on/dev/sdb1).Then Vista starts.It works.How can I restore to its original setup?Their booting is controlled by BIOS.
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Aug 15, 2011
I recently had a problem in Ubuntu 11.04. I had just installed GNOME 3, however, I didn't really like it as much so I decided to go back using GNOME 2,but then a whole bunch of things happened. I tried re-installing GNOME 2,but then I lost the Ubuntu enviorment and stuck only with GNOME and now I'm only left with a terminal whenever I log in. how to restore Ubuntu 11.04 back to its original state, like as if it had a fresh installation?
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Aug 17, 2009
how to restore the original yum settings?
I followed a walkthrough that set the yum config to be more robust(?) or harder to break F11 and since have had major problems installing things.
Can I roll this back or reinstall the yum parts of the OS from scratch to regain normal operation?
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Apr 9, 2009
When i click the green frog head, things dont behave as before. When i moved my mouse from the Favorites to Applications or to Computer/Recently Used/Leave tabs, the desktop enviroment would automatically switch, without me having to click them. Another thing is if i want leave the green frog toolbar i have to click somewhere withing the green frog head window to close that window. Before i was able to get out of it by clicking on any window out of it, like a firefox window. Also when i go to desktop setup , the only themes remaining are Oxygen and Aya.There were more before. Finally similar programs on the taskbar are grouped together which i don't like. how i could over these problems without having to reinstall the OS , preferably using the opensuse dvd.
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Apr 8, 2011
I have managed to delete my default openSUSE 11.3 KDE 4 desktop. I also ended up with this seemingly unchangeable desktop set up. How do I restore the original openSUSE 11.3 KDE 4 desktop ?
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Aug 5, 2011
The top right panel item contains the shutdown, time, network icons, etc. I don't use the messaging icon so right-clicked and chose 'remove from panel'. The whole lot disappeared! How can I restore things to their original state?
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Oct 23, 2009
I tried to install KDevelop4, decided I didn't want to use it, and now I am having trouble getting KDevelop3 working again. The only steps to installing kdevelop4 were installing a new version of kdevplatform and then kdevelop itself. I did this:
1) sudo yum remove "kdevplatform* kdevelop*"
2) disable updates and testing repo
3) sudo yum install "kdevelop"
The problem is that there is something wrong with the menus (File, Edit, etc). There are many important items missing, as well as one of them says "No text!". This indicates that this is not the original packaged version with F11 because I used it for a year and it was certainly not like this. Is there a better way to get back to the original version than I showed here?
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Dec 30, 2010
I recently had my laptop which ran windows xp, wiped and ubuntu installed in its place. I was told of all the grand benefits of ubuntu so I thought yeesss. Everything was running beautifully, everything was heavenly, until i encountered "a flash website ". This was strange because ..... worked fine.
Anyway ever since I encountered that site Ubuntu crashes on startup. I log in then crash. Its strange because sometimes it takes a while to crash e.g. when trying to open any application, or sometimes its instant.
1. How i diagnose this problem so it can be fixed, remember it may have to be before the log in.
2. Is there someway I can do a system restore to its original settings or something?
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Jun 29, 2010
well, by mistake i ran a command and chown the whole server apache:apache
now, i can't do anything... is there a way to restore the original permissions??
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Feb 26, 2011
I was in real doubt where to put this, so I hope I picked the right forum; otherwise, my apologies!
I want to build Roadsend PHP on my system. There seems to be no way to do this with the package manager, so I have to build it from source.
Turns out it depends on something called 'Bigloo'. Again no luck with the package manager, so I had to build this one from source too.
I took version 3.0c (Roadsend website recommends this version), did a
Code:
./configure && make && make install
, which did the job. Builing Roadsend worked, but I got a runtime error, which had to do with the Bigloo version.
No problem, I tought, then I'll just install Bigloo 3.1a. I did a "make uninstall" in the 3.0c dir, and tried to build 3.1a. This also worked, but now when I try to make Roadsend, I reports:
Code:
*** ERROR:bigloo.heap:
Release mismatch -- Heap is `3.0c', Bigloo is `3.1a'
So, somehow, there are still traces of 3.0c on my system. Maybe some file that didn't get deleted or some table entry that hasn't been undone?
My question is: How can I remove all traces of this version? Apparently, "make uninstall" is not thorough in this case.
And: Is there a general solution to remove everything when I did a "make install". So that my system is in the same state as it was before I ran the command?
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May 18, 2010
I have a weird problem that after increasing the screen resolution from 1024x786 (4:3) to 1280x900 something (also 4:3) that both top and bottom panels have disappeared. I am not familiar with the keyboard shortcuts to much but managed to get a terminal running so I should be able to do some command line stuff but as I am not too familiar where to edit perhaps someone can give me some pointers.
I guess first step is to restore the resolution to the original. Anyone any ideas?
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Feb 28, 2010
I use Lenny, and was trying to mount a .iso image, supposedly a cd imagem.
[code]....
This is what I get from dmesg | tail:
debian:/home/zac/cscd# dmesg | tail
[ 1811.505199] floppy0: disk absent or changed during operation
[ 1811.505207] end_request: I/O error, dev fd0, sector 0
[code]....
I did a little research on the web and it seems that this file is not really a cd image, but simply data in a .img file. What do you think of that?
debian:/home/zac/cscd# file cscd3.iso
cscd3.iso: data
Some people recommend to extract the data via the dd command, but it didn't seem very safe for me to do that!
[URL]
is it possible to extract the data into a directory (instead of a device) using dd? This file is supposed to be a software. I wanted to run it on wine by keeping it mounted on a mount point in my file system. Does it make any sense to try to do this if the file simply isn't a cd image?
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May 4, 2010
I'm setting up a server with Jaunty Jackalope version. I'm trying to test setting up a basic iptables rules... No matter which command I put in, it is failing on the first command when I run iptables-restore < file location (the first rule always fails). I'm doing this on the root user and first typing in the iptables rules in a test file. I've tried the first command starting with % sudo, iptables and -A. All have the same result. I've also tried letting the HTTP rule be first with the same result.
[Code]...
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Jan 27, 2009
I installed F9 for a friend. She wasn't getting any sound. I ran aplay -l, but got no sound card listed. I ran lspci -v, but got no sound card listed. However,the output of lspci -v said the computer had a particular motherboard. I Googled for it and was told it had an onboard sound card. That led me to the package called realtek-linux-audiopack-4.06a, which I installed. It included an installation script, which I ran.
The script didn't work to compile various files it was supposed to, but it did work to delete various files from my friend's system. Here are the bits of the script that removed files:
echo "Remove old sound driver"
if [ -d /lib/modules/$KERNEL_VER/kernel/sound ]; then
rm -rf /lib/modules/$KERNEL_VER/kernel/sound/pci > /dev/null 2>&1
[code]....
In the result, the failure of the compilation didn't matter, because lspci -v lied. She didn't have the motherboard shown, but a different one without an onboard sound card. Of the files deleted by the script.
I was able to reinstall libasound.so.2 and libasound.so.2.0.0, but I haven't yet tried to reinstall the other ones deleted by the script. Now, I want her to buy a sound card, but I'm afraid it won't work unless all the deleted files are reinstalled. I'm looking for guidance as to how I can reinstall the files deleted by the bits of the script I set out above, without completely reinstalling Fedora.
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Jun 15, 2011
we have a customer that ran a sudo chmod +x -R * command on his / filesystem by mistake and now the machine cannot be accessed on the network Has anyone any idea what chmod command to run to restore the system to its original state ?
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Mar 11, 2011
A few days ago I installed my first Linux product, which is Debian 6.0, and I installed the GRUB booting device on my main boot record, as it was suggested that it was a harmless step to take. Unfortunately, some quirk in my system made GRUB believe that I had XP when in fact I have Vista, so the options I have now are to boot Debian or to boot XP which is not on my computer. In other words, I have to get rid of GRUB now, but I'm realizing that he's not such an easy customer to kick out. I have moved my Linux installation to another drive, but the old GRUB always stays in place, and my Vista is stuck there frozen for eternity. So after considering all kinds of possibilities, I have come to the conclusion that the easiest way to restore my original boot record would probably be to find its backup copy that I assume the installation program made, and to copy it back into the right address at the beginning of the disk. I don't have the Vista recovery CD, so I really have to do this manually. So now my questions are these: did the installation program make a copy of the boot track, and if so, where did he put it and under what name, and finally, what command can I use from within the Debian terminal, which is now my only tool left, to copy the content of thesaid file into the first 512 bytes of the hard drive? I know that would be a simple matter for any serious geek, I guess I must be a little rusty. Anybody feel up to it?
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Jun 8, 2010
When booting into my slack12 fluxbox desktop today my fonts were so small they were hard to read. The same is true if I use kde. I didn't change anything that I can think of. I tried running fc-cache but it didn't change anything. My xorg.conf hasnt changed. Interestingly, my xterm font didn't change size, but the konsole font is tiny like my other desktop fonts.
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Dec 5, 2010
I have managed to write a bash script that moves files to the recylce bin instead of being deleted. Then (with a bit of assistance) wrote another bash script that deletes the files from the recycle bin. Now I need to write one that will restore the files preferably to their original location? I am very new to linux and stuggling with where to even begin...any ideas? There seems to be some advice about creating a cloning tree, but I've never heard of them?
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Jan 13, 2011
I am looking for an Open Source software making it possible to make a disk image of an Ubuntu installation as well as a Windows XP installation.I have checked out Clonezilla which almost solved the problem. However, the disk to which you restore needs to be the same size or bigger. I want to restore the whole thingo a smaller disk than the original.I am considering getting myself an SSD disk which will be considerably smaller than the 160 gb disk I have right now. I need it to work for Windows as well. Unfortunately I can't get rid of Windows quite yet I often participate in webinars on GotoWebinar and they do not support Linux ...
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Jan 5, 2010
I'm trying to resize image for mplayer overlay usage. I'm using "convert -resize" from Imagemagick. My problem is that after resize image doesn't have the original color depth nor palette.Code:convert logo1.png -resize 200 PNG8:logo2.pngI'm able to resize image correctly if I manually set depth and type, but this is not working when I have to resize images with different palettes.Code:convert -depth 8 -type PaletteMatte logo1.png -resize 200 PNG8:logo2.pngIs there any CLI tool or specific convert option to resize image with keeping all the other image related setting as original
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Dec 16, 2015
I am trying to upload some pics on my Facebook account using Firefox. When I click on Facebook's file upload icon, Firefox bring up a 'File Upload' window. I noticed that smaller image file is previewed on the lower right hand corner, while bigger image file is not. Is there anyway I can change this behavior or maybe change what Firefox is using to browse my files?
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Sep 1, 2010
I have SATA Western Digital 120GB 5 yeras old hard drive. There are four primary partitions. In order FAT-32, JFS, EXT4 and the last SWAP. Yesterday I copied the third ext4 partition with Clonezilla. Everything was OK. But Clonezilla issued therey strange for me message (and upsetting): "Hidden data between MBR and first partition" It was about 32KB. Clonezilla copied this hidden part as well as MBR. Clonezilla sugested that these hidden data may be used for some technical reasons. Now my questions:
1. What does it mean hidden? I partitioned disk with GNU fdisk.
2. Where they may come from these hidden data?
3. Should I be aware of them? Is it possible this is a some kind of hardware virus?
4. How to clean disk?
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Oct 1, 2009
Is there a way in SuSE 11.1 to have the conventional desktop, instead the plasma desktop? I thought that installing KDE 3.5 will fix it, but I was wrong. I really don't want to download back SuSE 11.0, just to have my old desktop layout. SuSE developers should at least leave it as an option than to force people to install it
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Feb 16, 2011
I was given a forensic Image which I now know is a DD image of the drive (Vista) and am trying to mount the image or extract the image to another drive. I'm not sure of the extention type or if the image is a partition or the entire drive. I think it is the entire drive.
Is it possible to mount a DD image to a device. If I can't do that I just want to extract the files to run some programs against the drive. Can I view the files under Ubuntu or do I have to remove the drive and stick it into a Vista computer.
I purchased a second drive today and was hoping the command line would be something simple.
Or am I on the wrong track, should I be doing this all in a windows environment. The reason I picked ubuntu was because of the reporting tools.
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Jul 7, 2010
Trying to configurate gadmid-bind, I change the user and group of my entire filesystem, I archive some advance getting all back but for now,sudo leave me with a problem about guid, i changed sudoers to root againg, but i don't get all back.I dosen't have network connection, because nm-applet dosen't start on my user, and when i run on a xserver with root user it give me: The device is not ready.
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Jan 22, 2010
I installed TrueCrype 6.3a on my 8.1 Ubuntu. Everything went fine until I got to the part where I need to protect my hidden volume from damaged caused by writing to the outer volume (these instructions: [url] ). I can't find the checkbox to "Protect hidden volume from damaged caused by writing to outer volume". The closest thing I can find is an option to "Protect hidden volume when mounting outer volume". Intuitively these don't sound the same to me. There are 2 difference between my setup and the instructions; 1) the instructions appear to be written for Windows and not Linux. 2) I am using a file volume and not a partition volume.
Does anyone know where the option is to protect the hidden volume when writing to the outer volume?
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Jan 27, 2010
What, if any, significance is there to the following message shown in the rkhunter.log?
Code:
[21:11:58] Checking for hidden files and directories [ Warning ]
[21:11:58] Warning: Hidden directory found: /etc/.java
[21:11:58] Warning: Hidden directory found: /dev/.udev
[21:11:58] Warning: Hidden directory found: /dev/.initramfs
What need would there be for hidden directories to exist in /?
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