Ubuntu Security :: Dual Booting With Truecrypt 6.3a Chainloading Grub2
Jan 4, 2010
I'm having problems getting TC to load grub2 1.97b4. When I hit ESC from the TC boot prompt, I get "no bootable partitions found".
I also booted into Ubuntu Live cd, mounted my LVM dm-crypted volume and tried to reinstall grub2 to my nonencrypted /boot under /dev/sda3 and TC still wont boot. Then I set the boot flag on /dev/sda3 and it still won't boot.
These are the commands I used to install grub2 to my /boot partition. Atleast that's what I think it did.
update-grub
grub-install /dev/sda3
grub-install --recheck /dev/sda3
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Jun 4, 2010
if it is possible to boot windows without the chainload option. I don't have xp on the first partition and I don't want to load xp bootloader on the first partition because it will overwrite grub2. All I want to do is boot xp directly from grub, is this not possible? Can't I just load the kernel like I do with linux? I've never had luck with getting grub2 to load xp, P.S. grub version is 1.97 from ubuntu 9.1 install
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Dec 27, 2010
right now I have windows 7 encrypted with truecrypt and I want to dual boot Ubuntu 10.04(not encrypted). I'm going to shrink my windows partition to install Ubuntu. Is there a way to add ubuntu to truecrypts bootloader?
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Jul 11, 2011
I installed Fedora 15, which was my first real departure from Debian based Linux OSs. I absolutely love the new Gnome 3, and was able to configure F15 to work as I wanted it to. On rebooting I realized that there was no boot loader screen, that F15 just booted and didn't give me a choice as to which OS I wanted to use. Eventually I was able to configure grub to let me see the boot loader and added my old boot loader as a choice. This worked well, maybe not a perfect solution, but it worked. This weekend I installed LMDE (Linux Mint Debian Edition) to another HDD. LMDE uses grub2 and after the install F15 was not recognized.
Two questions: Is there a way for grub2 to see F15? or Can F15 be installed using grub2? I really don't mind re-installing from scratch.
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Apr 29, 2011
I've been trying to get a dual-boot system with a truecrypted Windows partition and grub 2 in combination to work successfully and to date, I haven't had much luck. I'm using the grub 2 version from Ubuntu 10.04.2 LTS.I understand from searching through Google that there is presently no easy way to chainload the Truecrypt boot loader from Grub 2 in a similiar way that was done with Grub 1. This is because the Grub 2 payload is much larger and actually overwrites some of the Truecrypt boot loader, preventing it from starting.Does anybody know what might be going wrong here? I've been looking for ages now and can't seem to find any solution to this problem apart from restoring the Truecrypt loader to the hard disk and trying to chainload Grub 2 from Truecrypt. I'd rather use Grub 2 as the main loader though as Ubuntu Linux will be the main operating system in use.
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Feb 1, 2011
A little background: my primary install is fedora 9, I'm migrating to 14, and I need to change some partitioning (but not the F9, which is first on the drive). Because I installed a newer ubuntu a while back, I've been using ubuntu's grub2. That ubuntu partition needs to be moved, so I re-installed the grub 1 from F9 onto the MBR so the F9 doesn't depend on anything else.
This is when I learned grub 1 does not support booting ext4 partitions (which ubuntu uses). However, fedora claims that you can install grub 2 and have it chainloaded from grub 1, and in fact yum install adds a line to your existing grub 1 config to do so. That seemed like a nice solution since then all I would have to do is copy some grub.conf from the ubuntu partition into the F9 grub 2.
However, chainloading grub 2 does not seem to work very well. At all. I get to the grub 2 menu, but any option I choose -- including loading the F9 partition on which both grub 1 and 2 are installed, using the default config created by the installer, leads to an "unrecognized command" error, as if grub 1 was crapping out on a grub 2 config.
Anyone else had this problem? Better yet, has anyone done this successfully with any fedora version? I can backup ubuntu and copy it back in after I re-work my partitions, but while I'd prefer not to have to use grub 2 on the MBR, I'd still like to be able to boot ubuntu.
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Dec 20, 2010
I multi-boot Windows XP and 5 Linux distros on a single hard drive. Some of the distros come and go but I keep at least two that are my daily use distros. My boot loader is grub1 located on a ext3 formatted distro. I have installed a distro that requests the partition be formatted ext4, which I did. I have been trying to edit my grub1 menu.lst so that I can chainload the ext4 distro get errors or it goes to the command line with the last word being Grub. My question is, can grub1 ext3 chainload a grub2 ext4 distro?
Here is a sample of my menu.lst
Code:
title MEPIS at sda7, newest kernel
root (hd0,6)
kernel /boot/vmlinuz root=/dev/sda7 nomce quiet splash vga=789
initrd /boot/initrd.img
boot
[Code]...
Mepis is the location of my menu.lst and is ext3 on sda7 and aptosid is the ext4 distro that I am trying to boot on sda9 and it uses grub2.
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Aug 23, 2010
Is it possible to dual boot openSUSE & Ubuntu through GRUB 2? Apparently SUSE uses standard GRUB. I installed SUSE but only have Ubuntu options displayed on boot.
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Jun 13, 2010
The Problem, installing ubuntu over top of windows and vice versa causes the windows boot menu to forget about ubuntu.The Solution:1. Using bcdedit from within windows to edit the boot menuClick Start -> Type Cmd.exe run it in elevated mode (as an administrator) by right clicking it and selecting "Run As Administrator" Inside the console type bcdedit, notice that the ubuntu boot entry is still there, for example i use three o/s , windows 7 professional x64, windows 7 ultimate x64 and Kubuntu and it looks like this
Windows Boot Manager
--------------------
identifier {bootmgr}
[code].....
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Aug 7, 2010
I was dual booting on my netbook with Lucid and Windows XP, so the computer starts with the GRUB2 menu. I deleted the windows partition and now I only use Lucid on the netbook. I want to know how can I get the computer to simply boot into Ubuntu like a normal computer would do if it was not set up as a dual boot system?
How can I get the computer to go directly into the ONLY operating system rather than taking a detour through the GRUB menu?
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Nov 24, 2010
Don't know if I should have posted in Ubuntu specific section but since it involves grub2 and a quirk in my bios, I have attempted to multiboot 3 Windows versions and the problem I had was intalling a second Ubuntu. (Don't ask!) I had success multibooting with grub legacy on an older computer but this computer has a tricky mb which won't let me install grub to the second drive on an IDE port. What I mean by this is that since I already had boot files to the older drive in mbr- it won't allow me to install to mbr of the other drive in IDE port even if set first in bios boot order, my old computer allowed me to do so, exept perhaps its because 2 HDD were SCSI... (I have other HDD installed in RAID 0 on the other sata ports supported by mb (fakeraid) but I will use these for video editing as scratch disks later. One other HDD used for data is on the Raid port but not in an array).
I succeeded in installing Ubuntu desktop only after realising that I had to first switch my disk order in bios- otherwise the system would just hang. U. Desktop grub had sucessfully found Win bootloader links to both XP and Vista. I then installed Win 7 and used easy BCD and grub2 boot entry to link back to my Ubuntu Desktop grub 2 menu.
The problem occured when installing Ubuntu Studio ( for which I created a separate /boot partition) and I decided to install grub2 to mbr since it had correctly detected all my OSes! But then it seems it never installed correctly to the mbr. I still had Win 7 BCD bootloader in MBR! I tried to link easy BCD boot entry to the /boot drive but that didn't work and I ended up having to reinstall Win7 because I had overrid the BCD with faulty neogrub mapping entries- which I then removed and kept the orginal neogrub that still points to Ubuntu Desktop grub menu.
I also now realise that because I installed Ubuntu Desktop before I switched the HDD boot order in bios- U. Desktop's grub.cfg sees root of Desktop grub differently than neogrub BCD does root=(hd4,7) vs multiboot kludge (hd3,6) and at first I tried to install grub in the wrong hdds and partitions- I based mapping on neogrub's to find /Boot (hd3,2) and (hd3, 1) which is wrong!
What I am attempting to do now is to chainload grub2 from my Ubuntu studio located in /Boot with what I thought was the right mapping but still no success:
menuentry 'Chainloader' {
insmod chain
set root=(hd4,2)
chainloader +1
}
yielded error: hd 4,2 cannot get C/H/S values press any key to continue, also when in terminal in Ubuntu Desktop in
grub> find /grub/core.img
Error 15: File not found
I will attach Boot_info_script; at this point I am too tired and afraid that I will keep on installing grub to the wrong drive!
Note: I somehow got a problem loading into XP after all these failed attempts and a system 32 file seems to have gotten lost-haven"t attempted to fix yet. Just wondering in passing what happens if I chainloaded into Windows by error- if that could have corrupted it? Right now 3 out of 5 OS are bootable. I hope I can repair it without messing up my mbr again. Another issue is that some devices are on busy IRQs and then suddenly its resolved and my onboard LAN suddenly stops working at times so I don't know if any of this could cause XP to get stuck at loading screen.
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Feb 8, 2010
9.10 uses GRUB2, so the instructions below are obsolete. Is there anyone here who could provide instructions for adding Geexbox into the GRUB2 menu? If you already have a Linux OS installed on your system, you might just want to add a GeeXboX entry to your existing bootloader. This allow you to install GeeXboX very easily. From GeeXboX CD, simply copy the GEEXBOX folder into your Linux / partition (we suppose it to be /dev/sda1 here).
Modify the /boot/grub/menu.lst file to add:
title GeeXboX
root (hd0,1)
kernel /GEEXBOX/boot/vmlinuz root=/dev/ram0 rw rdinit=linuxrc boot=UUID=$my_uuid lang=en keymap=qwerty splash ...
initrd /GEEXBOX/boot/initrd.gz
quiet
Just take are about two things:
- the field root (hd0,1) is to be adapted according to the rest of your GRUB's configuration.
- the $my_uuid value is the unique ID of your partition. Check within your GRUB config file, which value is set for other OS on the same partition or use ls -l /dev/disk/by-uuid/ to see which uuid matches your partition.
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Mar 23, 2011
Alright, what I thought would be a simple task has me tied in knots.
I wanted to make a multiboot USB flash drive that I could easily manipulate to switch to various distros easily. My plans were:
1. Partition my 8GB drive to one large first partition (5GB) so that windows could access it. (P.S. GParted didn't partition correctly, needed to use fdisk. THIS MIGHT BE IMPORTANT IN SOLVING THE PROBLEM BECAUSE THERE MIGHT BE A BLOCK ERROR). I then made an extended partition with 5 500MB logical partitions.
2. Install Grub2 to MBR from Ubuntu
3. Expand ISO's of varios distros (Acronis Recovery, Puppy linux, etc.)
to the partitions, and create syslinux.cfg files for each (from the isolinux.cfg files that were already there)
4. Install syslinux to each partition's boot sector
Code:
#syslinux /dev/sdb5...
5. make grub.cfg on /dev/sdb1 chainload each partition.
THE GRAND PROBLEM:
Grub2 loads, but when selecting what I want to boot, I get the error
Boot error
which is syslinux, not grub2. So I know it's chainloading, but syslinux doesn't seem to find ldlinux.sys.
P.S. I'm not asking for other ways to make a multiboot drive, I know I can just direct boot from Grub2, but I want to be able to pass the boot to the boot loaders on the other logical partitions.
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Jun 15, 2011
I use openSuSE and want to try Ubuntu.This is the layout of the partitions:
Code:
sda1 /boot (SuSE)
...
[code]...
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May 23, 2010
After having encrypted my windows partition, truecrypt overwrote my mbr, and now I can't access grub during boot, not even when I press escape I was thinking of restoring my original mbr with the truecrypt rescue cd, boot into ubuntu and copy the mbr to the ubuntu partition, how to do it.
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Apr 9, 2011
I'm dual booting with windows 7 and Ubuntu and i was wondering where i should download AVG (i have a paid version) and what other security precautions should I take between both operation systems?
i have:
1 windows partition (~23gbs)
1 Ubuntu partition (~23gbs)
1 linux swap partiton (~10 gbs)
1 NTSF partition for storage (~170gbs)
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Nov 10, 2010
I really haven't used Fedora that much lately. I decided to give 14 a try and I wanted to duel boot with LXDE in case Debian SID crashes or there are other issues. Brief run down. I have both Debian and Fedora on seperate hard drives, both Encrypted LVM. Each hard drive has, of course, a boot partition that is not encrypted.
Now my issues are this. Fedora does not want to see Debian, Debian does not want to see Fedora (Lover quarrel I think.) Anyways I decided to just install G.A.G boot loader to the MBR and have grub installed on the boot partition for both Debian and Fedora. This worked great for Debian. However I can't seem to get the same grub commands to work with Fedora. As root I can't update-grub at all and when I try to grub-install to Fedora's boot partition it tells me that partition is not in the BIOS.
Now Truecrypt installed fine. But it will not run at all. Not when I click it in the accessories menu or if I try to run it for the command line. This is the first distro I ever had issues with concerning Truecrypt.
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Jun 19, 2011
I am thinking of installing Ubuntu on my machine, and I may need to still keep windows 7 around for certain games/apps. I want to do a full disk encryption using Truecrypt. As I understand, Truecrypt is compatible with both linux/windows/OSX, and has an option for a "hidden operating system."I want to Install both win7 and ubuntu, with ubuntu as a hidden OS. I have watched tutorials on ..... showing the method for creating a hidden OS for Windows, in this tutorial the second volume was created from the first volume and was effectively a clone of the original OS. Basically what I am asking is---- Is it possible for a hidden volume with a bootable version of Ubuntu Linux to cohabitate on the same drive as windows?If so, are there any howto's/tutorials you could point me to?
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Apr 8, 2010
I've been looking at setting up truecrypt on my laptop, but the guides on the truecrypt site and the ubuntu documentation seems to be incomplete or not address what i want to do.
What I have:
dual boot windows 7 / Ubuntu (lucid)
What I want is to dual boot with the hidden OS system:
Windows 7 (plausable)
Ubuntu (plausable)
Ubuntu (hidden install)
Is this possible? or is it better to make a hidden /home partition?
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Mar 21, 2011
I work for a all-in-one IT company, basically businesses hire us and we will fix all their problems from servers to pencil sharpenersI want to get some background with UNIX so i wanted to multiboot linux on my laptop and use it for a few weeks. After a few hours of trial and error i managed to install it! So to the point: i used Truecrypt to encrypt my laptop and it used a special boot loader that made me input the password just after the post.My question is, can i use Truecrypt with a multiboot 7/ubuntu? After it took me hours to install this , running into and trouble shooting various problems that were probably just my ignorance, but Linux feels very fragile and i do not want to screw it up.
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Jun 15, 2011
I have repeatedly installed Truecrypt and Easy Crypt but they do not "See" each other nor do they Encrypt Any Folder or File.
Easycrypt keeps telling me that I do not have Truecrypt installed!?
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Jun 22, 2011
TrueCrypt offers 3 hashes for use: RIPEMD-160, SHA-512, WHIRLPOOL.What do most people use? How does one go about deciding which one is appropriate for them? Do they differ in security or performance?
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Jun 30, 2010
I am having trouble getting my laptop set up the way I want it. I want to install Fedora 13, using Ext4 encryption, and I also want to install Windows 7 encrypted using TrueCrypt.
On boot, I would like to have Fedora 13s GRUB, offering me the two OS choices. If I select Fedora, then Ill get the cool graphical decryption screen, and if I select Windows 7 Ill get the TrueCrypt boot loader prompting me for the decryption key for the Windows 7 partition. Can anyone give me instructions on how to get this set up?
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Mar 23, 2010
When you are creating a TrueCrypt partition it asks what filesystem you will be using:
None
FAT
EXT2
EXT3
This is fine if you decide to create your partition on Linux but I am wondering what you would do if you wanted to create it on your XP partition and access it through the mounted drive. My XP is NTFS and that option does not appear.
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Mar 7, 2011
I downloaded TruCrypt but can't get it to launch.
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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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Feb 9, 2010
I have a 2nd hard drive that I have encrypted using true crypt. Is it possible to set this up with key files (or some other way) to auto mount when linux boots. I need it in true crypt because there are some work programs I dual boot to use in windows, and need to have access to the drive in XP from time to time, and true crypt can mount there as well. But 90+% of my time is in linux and I would like to have it auto mount through fstab (or whatever way it needs to be). My entire linux setup has been set up with encryption through dm crypt and LUKS (except for /boot). So I would think having a key file stored on the computer and an auto mount fstab would be just as secure as however secure my LUKS setup is. So any way to auto mount a true crypt 2nd drive volume?
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Jul 16, 2010
I installed TrueCrypt in Microsoft Windows XP SP3 (no Linux installations present) and I stopped the TrueCrypt service in the Windows enviroment, and then, I restarted, and all the sudden it seemed the PC can not see the Hard Disk at all at startup, nada... I believe I dismounted it by stopping the TrueCrypt service... So the PC no longer understands there is a TrueCrypt volume in place, and I inserted the TrueCrypt recovery disk, and it can not do any thing, I restored the bootloaders, the true crypt loader, and once I finished this, I press ESC, and it says there are no bootable devices, so nothing. I even decrypted the disk, and it seemed that nothing happened with the restore disk...
Is there any way I can make this partition bootable again? because I have every thing in that partition, every single bit of life... I have used TestDisk under Linux right now, but I am unsure of this, and I also further complicated the boot proccess, and now the PC states at startup about missing partition tables. When I start truecrypt from this Kubuntu live CD, I am unable to see the encrypted hard disk even with root, there is no way to see this hard disk, only can be seen in the TestDisk app. I really I am desperate, at least, if I can not make Windows Boot again, maybe just suck all the files out of the hard disk and put them some where for now, I really need to get back to work, and I cant seem to find a solution...
I know here at Ubuntu forums, some one may have the solution. And I do know for sure all the files on this volume are there because of the TestDisk app, so they are there, they are just not reachable.... (I have posted this problem on a Linux forums instead of a Windows forum because the only way to try to recover the volume is with Linux Kubuntu Live CD
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Sep 27, 2010
my current plan is to create a truecrypt container with the whirlpool hash. This container will be located on a hdd that is not where my OS will be located (so a separate physical sata drive).My concern is when this container is accessed, that some of the password information could be stored in my swap partition (which is on the main drive where the OS "/" is located)
I would like to have a script or command I could run that after I unmount those drives (or just halt the system) that my swap (and ram too if possible) could be wiped (or like overwritten with the shred command). Also, am I going about this the right way, or should I just use truecrypts FDE on the entire drive? In addition, when Ubuntu does it's default install, does it create a swap file in addition to a swap partition? If it does, would that be another vulnerability? If it is, how do I prevent this from happening?
I welcome any input you have on this. I am aware that once the drive is mounted, it is vulnerable, but I want the data to be secure as possible once my computer is turned off. Also, I have read that there are ram exploits where it holds your passwords for up to a few minutes after you turn the machine off, does anyone know how long that it and is there a way to clear it, or will only time let it fade?
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Oct 4, 2010
I'm simply interested in a more basic discussion of why one would choose one of these methods over the other. What do they offer that the other does not? I'll start with what I know:
- dm-crypt/LUKS
--- included in a lot of install images already; in other words, perhaps easier to implement on a fresh install
- TrueCrypt
--- multiple encryption algorithms possible
[code]....
For me... I have no need for Windows compatibility, though I do use OS X on a dual booting MacBook. I believe TrueCrypt woks with OS X, so that could be a bonus, though I can simply encrypt my home folder on OS X with it's own FireVault and be fine.My setup (after wiping and starting over) will probably be like so:
- /boot on it's own primary partition
- / on it's own primary partition with logical partitions within
--- /usr, /var, /etc, /opt, and the like on a logical partition
--- /home on a logical partition
/home will surely be encrypted and I'm leaning toward encrypting the rest as well, though perhaps it's not necessary. I'm open to input there as well -- is there anything the leaks from normal application use into /var or /tmp that would make one lean toward just encrypting the whole thing?
I opened up TrueCrypt just to look at it and since I can't encrypt a whole partition without losing data... I pretty much have to encrypt from what? A live CD? This could be a drawback -- I think since TrueCrypt isn't coming on install disks, I'd have to go with an unencrypted (or dm-crypt/LUKS) root partition and then use TrueCrypt to make a container (or partition) for /home only. I can't think of another way to do this since I can't encrypt the whole disk as one entity with my dual booting situation...
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