Debian Configuration :: DNS And Resizing Encrypted Partition
Feb 27, 2016
I have Debian and Virtual Box with another Debian. I have resized max size of vdi file with VBoxManage modifyhd but now I need to resize partition on virtual machine's system. I've downloaded GParted and I can run machine from this ISO as CD. Partition is encrypted on machine.Unfortunately GParted doesn't start with X so I have to use it in terminal. I can see partitions:
Code: Select allroot@debian:/# fdisk -l
Disk /dev/sda: 80 GiB, 85899345920 bytes, 167772610 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: dos
Disk identifier: 0x3914....
[code]....
So I though maybe I need to use this (URL...). I couldn't find similar tutorial about Debian or GParted but OK, it's just executing these commands, not modifying its source.list.But I cannot even do the update:
Code: Select allroot@debian:/# sudo apt-get update
Err: http://free.nchc.org.tw/debian sid InRelease
Temporary failure resolving 'free.nchc.org.tw'
Err2: http://free.nchc.org.tw/drbl-core drbl InRelease
Temporary failure resolving 'free.nchc.org.tw'
Reading package lists... Done
W: Failed to fetch http://free.nchc.org.tw/debian/dists/sid/InRelease Teporary failure resolving 'free.nchc.org.tw'
W: Failed to fetch http://free.nchc.org.tw/drbl-core/dists/drbl/InRelease Temporary failure resolving 'free.nchc.org.tw'
W: Some index files failed to download. They have been ignored, or old ones used instead.
So I check my internet connection. VirtualBox has 'attached to NAT' and before I run out of space on virtual machine, Debian could access internet. So it's only something about this GParted. I have modified /etc/resolv.conf with vi (even vim is not available). And it has two valid nameservers. I haven't restarted anything, as I'm not sure if I need to, after modifying resolv.conf file.But even in that case I cannot ping anything from GParted:
Code: Select allroot@debian:/# ping www.google.com
ping: unknown host www.google.com
How can I access internet from GParted and resize encrypted partition?
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Apr 4, 2011
When I installed Debian on this machine, I went with guided partitioning, encrypted lvm, and Debian defaulted to a 10GB / partition. I figured, hey, defaults are there for a reason, so left it alone.
Now that I need to shrink my /home and extend /, I'd like to do so as easily as possible. I installed system-config-lvm, read its man page ( which is really just a long description of the program, not much instruction ) and fired it up. Won't let me resize ( shrink ) /home, said files are in use.
Is there a way to use the nice pretty graphical tool, or do I need to boot to a non-X-using runlevel and log in as root, then muck about with CLI tools like lvresize and resize2fs?
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Jan 23, 2016
Is there a way where I can take like 50GB from my home folder (I have 375 avail., but using only 22GB) and put it to the root partition? Twice now my system has almost ran out of space on root, so luckly I was able to clear out old stuff so I don't have login issues after finding the hardway the first round lol. I just want to make sure I can login with out being forced back out because root don't have space to let me login.
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Apr 30, 2011
My partitions are set up as follows:
[code]...
I installed Ubuntu successfully using rescue mode on the alternate cd, and let Ubuntu use an internal boot and home. At the final stage grub refused to install to the MBR, and then refused to install to my /boot partition on /dev/sda2. It said: No boot loader has been installed, either because you chose not to or because your specific architecture doesn't support a boot loader yet. You will need to boot manually with the /vmlinuz kernel on partition /dev/mapper/volumegroup-natty and root=/dev/mapper/volumegroup-natty passed as a kernel argument. Returning to debian, I did a update-grub, which detects Windows and Ubuntu:
[code]...
How do I make grub decrypt the LUKS partition before attempting to load the Ubuntu kernel?
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Feb 16, 2011
couldn't find anything similar on the forum.I am writing a kickstart for fedora 14 with a partition table similar to:
part / --asprimary --fstype="ext4" --size=10000 --encrypted --passphrase=pass1
part /boot --asprimary --fstype="ext4" --size=130
part /var --fstype="ext4" --size=5000 --encrypted --passphrase=pass1
[code]...
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Jan 9, 2010
I used gparted in PartedMagic to resize my /home partition from 360GB to 160GB, and create a new FAT32 partition out of the remaining 200GB.My /home directory only had about 9GB worth of files in it and as far as I can tell there was no reason for any of them to be anywhere near the portion which was deleted. So the resizing and creating the new partition seemed to go fine. Then I rebooted and it got stuck while booting into Debian.
I tried checking my BIOS for an IOMMU option but there doesn't seem to be one at all. I also only have 4GB of RAM so I don't know why it thinks I have 4.75GB.
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Jul 24, 2011
I am trying to re size a drive but after a message of successful resizing, nothing changes !
This is original size
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/k9-root 322M 253M 53M 83% /
tmpfs 2.0G 0 2.0G 0% /lib/init/rw
udev 2.0G 204K 2.0G 1% /dev
tmpfs 2.0G 1.0M 2.0G 1% /dev/shm
/dev/sda1 228M 15M 201M 7% /boot
[Code]...
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Sep 6, 2015
Debian encrypted LVM disappears every time on sda when I install any other also encrypted Linux distro on sdb.
How can I set up Debian that way that it wouldn't disappear or how can I recover it form UEFI?
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May 16, 2011
I installed an old version on accident, I used an encrypted LVM. When I removed the old debian and started the installation of the new version, the encrypted partition could not be used to install, and the drive itself was creating an error message when I tried to mount the installation there. This is probably a vague explanation of what is happening, but does anyone know how to remove these encrypted LVM partitions?
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May 2, 2015
I'm trying to install Debian on a USB to create an encrypted partition, I get an error message saying I need to install missing firmware rtl_nic rtl8168d-2.fw.So I download that file and try again this time I get an error " There was a problem reading data from CD Rom" .I not using a CD Rom I put debian on the USB as an ISO file first using Unebutin then tried Rufus.
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Dec 30, 2015
I want to move my old system to a new drive. Currently I have Debian installed with following configuration:
I have an encrypted system where everything is encrypted except /boot. Currently I've /boot and / installed on a 16 GB mSata SSD and /home on a regulard HDD. I've got a 500GB SSD for Christmas and want to move the whole system to the new SSD.
I just wanted to ask if I've got the process required to to this down:
1. backup root-directory (/) without and /boot /home using tar keeping file-permissions and owners to ext. hard drive
2. backup /boot and /home separately using the same method
2. replace HDD with SSD remove mSATA SDD.
3. boot via live-usb
4. create appropriate volume groups, partitions, setup encryption etc.
5. extract backups to appropriate partitions
6. chroot to old /.
7. edit fstab
8. reinstall grub
9. create new init ram img.
I'm pretty sure I've got steps 1.-6. down but I'm very shaky on what to do next.
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Jan 15, 2016
Is it better to install LUKS to raw disk (/dev/sdb) or disk partition (/dev/sdb1)? What are best LUKS options?
"cryptsetup benchmark" output
Code: Select allPBKDF2-sha1 1310720 iterations per second
PBKDF2-sha256 862315 iterations per second
PBKDF2-sha512 590414 iterations per second
[Code] ....
Is slow hash better or how to choose it? It is clear that aes-xts is best choise. Is 265 bit key good?
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May 31, 2011
is it possible to mount a truecrypt file container as a home directory before login, if so how to do that?
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Feb 1, 2016
I have two basically identical harddrives that are encrypted with LUKS containing a complete debian installation:
Code: Select allroot@x200s:/home/b# lsblk --fs
NAME FSTYPE LABEL UUID MOUNTPOINT
sda
├─sda1 ext2 0b851969-281e-4db2-8a5b-3798e801711b /boot
├─sda2
└─sda5 crypto_LUKS cfcf63ef-448a-4f72-9f58-8f7731cf3dfc
└─sda5_crypt LVM2_member 21CS3f-SQeQ-XcMr-kyDs-OPtR-egmT-HkvJAu
[Code] ....
sda is what I currently run to write this text, sdb is my former harddrive, connected via USB.
I want to access the root partition on sdb.
The problem is:
Code: Select allcryptsetup luksOpen /dev/sdb5 oldhd
Enter passphrase for /dev/sdb5:
root@x200s:/home/b# ls /dev/mapper/
control oldhd sda5_crypt x200s--vg-root x200s--vg-swap_1
root@x200s:/home/b# mount /dev/mapper/oldhd /mnt/
[b]mount: unknown filesystem type 'LVM2_member'[/b]
[Code] ..
Before all this, both sda and sdb where in the same volume group. I renamed the volume group of sdb to "oldDisk"
using
Code: Select allvgrename <UUID> oldDisk
How I can access the data on the root filesystem of my sdb..
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Dec 7, 2015
I use a static compiled kernel and a fully encrypted disk apart from a boot partition. I have recompiled and installed kernels many times. When I tried with the latest kernel from Testing, 4.2.6, the system will not boot. Not only that but the previous kernel now does not boot. However, a stock modular kernel does boot. The static kernel hangs at:
Code: Select allVolume group "dk" not found
Cannot process volume group dk
/run/lvm/lvmetad.socket: connect failed: No such file or directory
WARNING: Failed to connect to lvmetad. Falling back to internal scanning.
Reading all physical volumes. This may take a while...
/run/lvm/lvmetad.socket: connect failed: No such file or directory
[Code] ....
And after giving the password the boot continues successfully. How to diagnose it further?
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Aug 24, 2010
I am trying to create an encrypted file and later mount it as a filesystem.
KEY=`tr -cd [:graph:] < /dev/urandom | head -c 79`
echo $KEY | openssl aes-256-cbc > container.key
dd if=/dev/urandom of=~/container.img bs=1G count=10
losetup /dev/loop0 ~/container.img
[code]....
The luksOpen command asks me for my passphrase, but always rejects it. I have retried this several times and written down the passphrase - and even tried with a very simple one just to check. And I never can make it work.
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Jun 28, 2011
how can I set the keyboard layout used by Debian to enter the password of my encrypted filesystem?
After my recent "aptitude upgrade", I have not been able to mount my encrypted filesystem anymore. I have discovered that the keyboard layout used to enter the password has changed. Problem is that with such layout I can't enter some of the characters composing the password. The encrypted filesystem looks intact, since I have been able to mount it and backup my files by means of a live CD. That means that I can edit any system file, if needed.
Every technique I have found to change layout cannot be employed in this case, since they rely on the system being up and running. I've tried editing /etc/default/keyboard, but that does not work.
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Feb 11, 2011
I have 2 identical disks originally configured as a pair for a server. Each of the disks has 2 partitions dev/sdb1,dev/sdb2. The sdb1 partitions I had configured as a raid1 mirror. The sdb2 partitions were non-raid and used as extra misc. Space. Further, the raid setup is also encrypted using dm-crypt luks. Now I want to redeploy each of the disks for new purposes. One of the disks i want to deploy exactly as before (keeping the partitions and content), however without being part of a raid array.
I've successfully deployed this disk into a new system and I am mounting the dev/sdb1 partition as dev/md0 because the disk is set to autodetect raid. Actually I am using cryptsetup and mounting with mapper. Can I get rid of the setting for auto detect on this partition without losing the data, or breaking the encryption? I just want to mount the partition as a standalone encrypted disk. Is it as simple as doing crypt setup luksOpen /dev/sdb1 then mounting it with mapper? Or do I need to change the partition in some way. Or do I simply continue to operate it as a 'broken' raid array?
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Jul 22, 2010
Now however its not letting me resize the Windows partition, mounted or unmounted. It currently occupies the whole disk. I would rather not reinstall the whole thing over again, but I will if I have to. Isnt there an easy way to shrink a Windows partition? I swear Ive done this before and it wasnt this hard. Could it be a problem with the Mint installer that now asks me if I want to unmount my disks before it goes into install mode? On this PC I would like to have
Windows XP
Mint
Ubuntu-Studio
Edubuntu
One of the E17 OSs
Puppy Linux (to create a remix)
I am probably going to put most of the linux partitions on the second laptop drive but I want to install files on a non WIndows NTFS partition.
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Dec 16, 2010
I know there are probably alot of threads about lvm however they aren't addressing my problem. I want to extend the PEs available in a VG. This VG already has LVs and those are active and mounted. From what I read from the manpages of pvresize this should be perfectly possible.
Code:
pvresize resizes PhysicalVolume which may already be in a volume group and have active logical volumes allocated on it.
I did the following steps and wonder if anyone has the same issue. THe machine where I am talking about is an ESX VM.
1. Resized the vmdk in ESX (+1G)
2. Let the kernel reread the device geometry: echo 1 > /sys/block/sdc/device/rescan
3. fdisk shows me the new size... so far so good
4. I resize the partition using fdisk (remove, recreate) and gave it the 8e type (lvm)
5. wrote config to disk
6. executed partprobe
7. pvresize /dev/sdc
Here it goes wrong! Pvresize says in the verbose output it sees the same size however at the end it says the pv has been resized. I have seen when I put volumes "offline" using vgchange -a n vg on a test machine, and then try pvresize it seems to work ok. This is against what is in the manual as it says pvresize should work on online mounted volumes.
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Nov 20, 2009
I have a small disk and I want to resize to 2 gb the swap partition, how I can do?
[root@server12 ~]# lvdisplay
--- Logical volume ---
LV Name /dev/vg_fedora11/lv_root
VG Name vg_fedora11
LV UUID Zwl9te-GQ1j-5Py3-Jiz0-JFAY-sy7n-iaV2TP
LV Write Access read/write
LV Status available
# open 1
LV Size 52.32 GB
Current LE 13393
Segments 1
Allocation inherit
Read ahead sectors auto
- currently set to 256
Block device 253:0
--- Logical volume ---
LV Name /dev/vg_fedora11/lv_swap
VG Name vg_fedora11
LV UUID k61vCI-YAdI-XgNX-xRaG-B7jY-CTMQ-LKOjwk
LV Write Access read/write
LV Status available
# open 1
LV Size 3.92 GB
Current LE 1004
Segments 1
Allocation inherit
Read ahead sectors auto
- currently set to 256
Block device 253:1
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Feb 15, 2010
I want to give Mandriva 2010 a shot, and I want to resize my 500gb /home partition (logical) to make some room. It's an ext4 partition. Do you reckon I'll be safe resizing it from the Mandriva installer? or should I use an Ubuntu LiveCD first?
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Apr 1, 2011
I didn't like the fact that Ubuntu allocated like 5gigs of swap with its automatic partitioning / install. So I decided to shrink it with gparted now it doesn't show up when I boot I have to select swap on in gparted to use it.
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Sep 14, 2010
I have slackware 13.1 installed on my desktop and I have all my hard drive dedicated to it. But now Im thinking about resizing my hard drive so that I can install windows so my brother can play games on it ( probly giving 50 Gigs to windows )I heard that parted ( located on slackware cd 1 ) is what I should use. So I was wondering if I need to backup any important files before doing the resizing? I would also appreciate it if someone could link an good tutorial for doing partition resizing .
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Dec 17, 2010
when i have installed fedora 14 from the live CD....i noticed fedora give 4.9 GB SWAP partion:mad and give the root another 4.9 GB.... every time i monitor the swap is free cuz my RAM is 3 GB.... I want resize my root and take the space from the SWAP and give the SWAP only 1 GB... im worried that i miss up with system.... any clean graphical interface recommend me...? or any clean way to resize..?
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Jun 8, 2011
The following is what parted print outputs:
(parted) print
Model: VMware Virtual disk (scsi)
Disk /dev/sda: 26.8GB
Sector size (logical/physical): 512B/512B
Partition Table: msdos
[Code].....
I want to resize my swap partition /dev/sda2 to use 1GB out of the above space. How can I achieve that?
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Mar 11, 2010
Today I was messing around with my partitions, and I decided to shrink my main partition that had Windows on it, so that I would could have one big storage partition and then a Windows 7 one and a Ubuntu one. Well, it didn't really work so I decided just to wait for Lucid to come out and start with a fresh install. So I went into EASEUS Partition Manager and resized my main Windows 7 partition back to its normal size. It had to reboot and did its stuff, and then when I restarted my computer, grub was showing the grub rescue> thing. So I went into the Windows 7 recovery disk, and tried all the BootRec.exe options. None of those worked. So I decided to go to the extreme and just delete Ubuntu completely.
I deleted the entire partition with GParted and then resized the main partition all the way. Then I booted into a Ubuntu live usb and re-installed Ubuntu. I thought it would just reinstall Grub and I would be able to get to both Ubuntu and Windows 7. It did install Grub, but now I can only boot into Ubuntu. It's really weird, because I can boot into windows, it just says starting windows and does the loading thing. And then EASEUS Partition Manager comes and says that all resize operations were complete successfully(because I hadn't booted into windows since I resized stuff with it) and then the screen just stays black for a long time. I don't know what to do. If I wait long enough, my computer just reboots...
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May 10, 2010
I have a LVM logical volume, that contains a LUKS encrypted volume, on which is an ext4 filesystem. I shrank the partition to the minimum size. Next step is to luksClose the device, and then to resize the LVM logical volume. I suspect that LUKS has overhead. So if the ext4 filesystem was resized from, say 1TB to 500G, I have the idea that resizing the LVM LV to 500G does not take LUKS overhead into account and this might corrupt data on the end of the FS. So, what's the smart move to take? How do I calculate the safe minimum LV size? Or should I just give the 500G disk a few gigabytes extra to be sure?
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Aug 4, 2010
Are there any bad effects of resizing a partition? (like loss of data).
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Jan 15, 2010
I am new to linux and have installed fedora 12 on my system. The partition sizing which I had done is :
- 17 gb
home- 8 gb
mp -1gb
usr -2gb
Boot -200mb
swap - 4gb (I have 2 gb RAM)
all partitions of ext4 format.
I would like to know that whenever I am going to install any new software or packages then it will be installed in which folder or partition? I have only 170 mb space free in user and have not installed any thing yet. Do I need to resize it. If yes, then how can I do so?
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