Debian :: From LVM/XFS/encrypted To Ext4/unencrypted?
Sep 5, 2010
The system disk on my lenny 64b system is using LVM, encryptions and XFS (/boot is ext2). I'm looking forward to turning it into old-style, ext4 unencrypted partitions (and thinking about btrfs in the future. Despite having used Debian for many years now, I haven't really ever tried a true migration and all of the guides out there are concerned with turning an unecrypted to encrypted. My basic idea was to use the installer and set up a minimal new system on a fresh disk, then migrate all of my stuff from the old system.
I have some doubts though
1- is this the easiest way to get the task done?
2- what do I have to copy from the current system /etc? and most importantly, what I should *not* copy?
3- how do I replicate the current package configuration on the new system without falling into a dependency hell?
I have Ubuntu Karmic. I chose to install with an encrypted home directory. Recently I got a warning that I only had 2GB of drive space left. This is mostly because of my videos. So I went and bought a new hard drive and partitioned it and made 1 ext4 partition and copied my videos all to the new hard drive. I added a line in my fstab to mount the new hard drive to ~/videos, but when I reboot the computer, there is a screen saying something like "error mounting /home/me/videos, press S to skip or something else to reboot". If I press S to skip, then when my system comes up there is a video directory but it's empty because my other hard drive didn't get mounted. I can run sudo mount /dev/sdb video/ and it will mount fine and I can see all my videos, so why can't fstab mount it? Does this have something to do with my encrypted home directory?
I just picked up a 1.5TB external drive. I want to wipe the NTFS partition (I assume that's what it is) that is there and replace it with an encrypted ext4 partition.
I accidentally deleted my root ext4 partition, which I had encrypted. I am unable to log into any os since I am blocked by a Error 17. Is it possible to retrieve an encrypted ext4 partition, does it even matter that it was encrypted.
I've got input/output error from files in encrypted ext4 partition (external hdd), and I cannot delete them. What can I do to fix this? I don't need to recover them, I just need to delete them
My wireless is 'almost' working, but frustratingly not quite there. Debian Testing (squeeze). I have two different wireless adapters. Both work flawlessly from an ubuntu live CD in the same machine, connecting to the same unencrypted access point so the problem is not faulty hardware, weak signal, overpowering signal, interference from other AP's, MAC filtering, or anything to do with WPA.
I have loaded the correct (I think) firmware packages for both adapters. dmesg is not complaining about missing or incompatible firmware. I have googled the various error messages reported in dmesg and found that the /etc/Wireless/RT2860STA/RT2860STA.dat missing config file is normal. I could not find anything that I understood concerning the BSS returned, data->length messages but since I see the same thing in Ubuntu (where the wireless is working flawlessly) I assume they are also normal and not related to the problem.
Both adapters can see all the available access points (using iwlist {iface} scan or using gui tools such as wicd, wifi-radar) NEITHER adapter will associate with any access point (and I've tried three different unencrypted AP's so far). I can connect to all/any of these AP's from an ubuntu live CD using the exact same hardware, so this is NOTHING to do with MAC filtering, etc... using 'iwconfig {iface} essid' as root to set the essid "appears" to work, but simple does not set the ESSID on either wireless adapter.
Using the GUI tools (which are only a front end for the command line tools so I have no idea why everyone thinks a GUI front end like wicd will magically work where the command line tools don't!!) I simply wait a long time for "getting network address" before it eventually fails. LOTS of information in pastebin, please make the effort to read it before asking me for things I have already supplied. And please keep any "RTFM noob" or "go back to ubuntu" replies to yourself. I HAVE read the f*cking documentation and I do not want to go back to ubuntu. I just want to get my wireless working in debian.
I got a problem booting ubuntu 10.4 RC but i solved it by replacing root partirion uuid in grub boot menu then I disapled totally uuid passing to linux from /etc/default/grub . but something else i noticed why grub choosed insmod=ext2 why not ext4 specially I use now ext4 .I tried by editing the grub boot menu replacing "insmod=ext2" by "insmod=ext4" it booted and the three lines error during booting that i used to see them science ubuntu 9.10 totally disappeared . really I dont understand can anybody explane for me.and if what i did was right ,can anybody tell me how to make grub always and permenantly detect ext4 as ext4 not as ext2.
I upgraded to FC15 in early june, come June 15 Thunderbird suddenly ceases to send or receive any email. It pops up with the message "You may have exceeded you maximum connections" and I've tried changing the cache connection count to 1 instead of the default 5 and every OTHER post about that error suggests to no avail. Funny thing, my primary desktop is still on FC13, same thunderbird version, arch and account setup (with SSL enabled) and works flawlessly. Even with -safe-mode enabled it doesn't work. My lightning calendar also doesn't sync since then.
I have found that if I turn SSL off IMAP works again, SSL SMTP still fails. If I turn SMTP SSL off it sends mail. The calendar is an https (SSL) link. Obviously the issue is SSL and Thunderbird in FC15. There are no errors/messages in the console, maillog or the in-built error console. I will NOT use mail without SSL as I may occasionally use unencrypted WiFi.
I had 5.4 machine. Upgraded to 5.5 today via yum upgrade. All went fine. Rebooted. Wanted to convert root partition to ext4 (I have three partitions: /boot, / and swap). All of them on software RAID 1 (root is /dev/md2). I did the following for converting
yum install e4fsprogs tune2fs -O extents,uninit_bg,dir_index /dev/md2 nano /etc/fstab # I indicated here that my /dev/md2 is of ext4
I have a machine running Xubuntu [2.6.22-14-generic]. I have been trying to get this machine connected to wireless for ages, and I'm having another stab at it. So far I have install ndiswrapper and loaded the driver for a Linksys wireless adapter. The output of 'ndiswrapper -l' reports:
So as far as my newbie knowledge goes, I believe that step to be completed, correct?When I turn on the machine is type in
Code:
sudo sh modprobe ndiswrapper
to get the card running to where it will appear in the iwconfig dialog.The commands 'iwlist wlan0 scan' will list all the wireless networks around me, but I have been un-able to connect to any network, even unencrypted ones. I have tried to connect both through Wicd and command-line to no avail. For command-line I have used:
Code:
sudo ifconfig wlan0 down sudo dhclient -r wlan0 sudo ifconfig wlan0 up
[code]....
With the final 'dhclient wlan0' commands, the following is returned:
Code:
There is already a pid file /var/run/dhclient.pid with pid 134519120 Internet Systems Consortium DHCP Client V3.0.5 Copyright 2004-2006 Internet Systems Consortium
[code].....
I have attempted to go ahead a step further and connect to an encrypted wireless network, however, I receive the same message, as well as another error message upon trying to enter the key, with the following code:
Code:
iwconfig wlan0 key s:"thekey"
Error for wireless request "Set Encode" (8B2A) : SET failed on device wlan0 ; Invalid argument.
Here is a situation I have never come across (though I have only been using linux since 2004).I am running ubuntu 10.04 and using Wicd Network Manager.I can connect to my WPA encrypted home network, but if I go to my coffee shop to use their unencrypted wifi - I cannot.Even using the terminal. I think it is the way the device sees the network - but I don't know how to fix it.I have a screenshot with wicd here:And one with connecting to the essid here:Afterwhich, dhclient was unable to obtain an ipaddress - just like wicd above.
My iphone connected to this network easily without encryption or needing to use the browser to authenticate, etc.Any ideas on how to fix this?Specs:Samsung NC10lspci:
I manage a linux-based network, where some projects are currently under development. Our IT policy states that any email attachment shall be encrypted using GPG. Can I block other attachments using a firewall?
Note: Currently our mail server is not in campus. So I can only use a firewall for this security issue.
I just don't get it? I've attempted multiple times to get the knetworkmanager to connect to an unencrypted network, yet it keeps asking for a wep key. However the networkmanager in the Gnome version connects to unencrypted networks just fine. Why won't knetwork manager do the same?
I was having a discussion with someone who said that telnet, FTP, HTTP plain-text authentication in the local subnet is ok because it's a switched network. Also, that these protocols are not good over the net but in a local subnet they are just fine.
I know that someone can plug a hub in the network port and connect 2 (or more) PCs and see the packets. Also, heard about ettercap but haven't really delved into it. I know dsniff was written to prove the point that unencrypted protocols are bad. Would like to get opinion about unencrypted protocols over a switched networks.
I installed Ubuntu 10.10 64 on my laptop with the entire 500gb setup as encrypted LVM. This has worked well for several months with no problems. During this time i have been backing up the data to an external usb drive (1tb) on a regular basis. The usb drive was not encrypted. So, I thought it would be a good idea to encrypt the backup drive too. I wiped out the backup drive and set it up as one large encrypted lvm and mbr. This seemed to work fine but immediately afterwards I decided to erase that and set it up as encrypted lvm guid instead of mbr. I couldn't delete it while logged into my desktop so i decided to do it from a bootable gparted usb stick. In gparted i erased the 1TB backup drive once again and planned on setting it up the way I wanted once I was logged back into my ubuntu desktop. Now I cant boot into my desktop with the following errors:
cryptsetup: evms_activate is not available b0d) does not begin with /dev/mapper/
Then after waiting for a few minutes I get an error followed by (initramfs)
When booting from a live version of ubuntu the 250MB boot patition is recognized and 500 partion is there but it is labeled as empty/unused.
Also, I did choose to use the exact same passphrase as what is used on the main bootable drive when I set up the encrypted partition on the external 1TB drive.
I've just started using ubuntu one. However, some of the files I store on there are sensitive so I encrypt them using seahorse. Right click, encrypt etc etc. My question is, is there a way to automatically get the encrypt process to delete the un-encrypted file when it makes the new encrypted copy?
I am trying to do a command line installation.Finished the installation and my wireless card wasnt working.Did a "sudo ifconfig wlan0 up" and got it working.But for some reason wireless-tools is not installed thus I dont have iwconfig, iwlist, etc.The wireless works and connects fine off a liveUSB.So I am going to give info from this liveUSB run and maybe someone can suggest how I can set the right settings on the Command Line Installation I presume in the etc/network/interfaces.
I followed this howto in order to mount CIFS shares on demand. This works great, however, this guide suggests leaving my network passwords unencrypted on the disk. This is a very bad security practice, as the passwords can be easly retrieved by booting the computer using a different OS.
I was looking for a way to secure things up, so I came up with this solution: Instead of storing the passwords plain text on the disk, I store them in a tar file encrypted using GPG. When I boot my system, I open this file to a directory in /dev/shm, and order AutoFS to retrieve the passwords from there.
This does the trick, but I presume this solution is not that secure, since /dev/shm content can be written to the swap partition. Is there any other solution which is a better security practice? Maybe using some sort of keyring service?
I recently downloaded and installed and updated Debian squeeze. Its a dual-boot machine and the migration process is going to take its own time. In the interim, I want to look at the ext4 partitions through windows. I know/knew about ext2ifs fs-driver.org but somehow I'm not able to view the ext4 partitions even though they show up in Control Panel as ext2ifs drives.
If you guys know of any other softwares which can do the same work or better please lemme know. I also tried something called ext2explore but that one crashes all the time around. Lastly, does somebody know which is the best way to be in the know of Squeeze development and the milestones within it.
I thought I'll be smart, and installed squeeze on ext4 partitions ( boot-ext2, root-ext4, home-ext4 and swap). With my Lenny (ext3), I use partimage to backup the / partition, and rsync to backup my /home files. Now, I found out that partimage does not work with ext4. Are there other GNU packages I can use to backup my / partition?
1. Edit ext4 entry in /etc/fstab /dev/sda2 ext4noatime,barrier=0,data=writeback,nobh,commit=90,errors=remount-ro01
2. Add this line in /etc/default/grub GRUB_CMDLINE_LINUX="rootflags=data=writeback"
3. Run update-grub
4. Reboot to recovery mode and run: tune2fs -o journal_data_writeback /dev/sda2(did not work) Reboot to a LiveCD and run: tune2fs -o journal_data_writeback /dev/sda2(did not work)
I've heard that ext4 has better performance, but that it will also eat my hard drive. Has this problem been fixed? What would be a safer bet on a squeeze box? Is there even anything to worry about?
I'm not sure if this is a Debian question or a VirtualBox question, so I'm posing here and will likely pose it on the VBox forums as well.When I install Debian into a new VirtualBox VM, it always installs Ext3 as the file system. I've tried the Advanced installer, but there does not seem to be a way to specify Ext4 as the file system.My questions are:- Is Ext3 the default for Debian 6?- Can I specify Ext4 as the file system at install? Should I even care? I know Ext4 is faster, but would that performance boost be meaningful for a laptop/cloud user?I know I can convert from an Ext3 to Ext4, but that's clearly a lot more work than just installing it during initial setup.VirtualBox does support Ext4, as I have installed Ubuntu 11.04 with Ext4 and it boots and operates fine.
I have a problem with my debian install. I 've got a laptop with 3 OS:
First I installed windows.
Then I installed ubuntu 15.04 in an encrypted partition, and another partition with /boot (/dev/sda6) created when I installed Ubuntu.
And, finally I installed Debian 8 in an encrypted LVM (/dev/sda8) with 3 partitions (/, /home and swap), and a /boot (/dev/sda7) partition created when I installed Debian.
Needless to say that both /boot partitions are not encrypted
Previously I had a similar configuration with ubuntu 14.04 and Debian wheezy.
The problem is that I can't start the system by using the Debian grub (/dev/sda7). So Ihave to boot the system using Ubuntu's grub (/dev/sa6). The second part of the problem is that when I boot Debian using /dev/sda6 (ubuntu's grub) , plymouth does not work.
I tried purging grub and reinstalling it again with the ubuntu partition mounted, and it did not work.
I did not have this problem with my previous configuration (with wheezy and xubuntu 14.04) ...
I've installed Squeeze on a USB stick, but can't get it to boot. I've had this problem before and gave up last time. I installed on an encrypted LVM - here is the grub.cfg
# # DO NOT EDIT THIS FILE # # It is automatically generated by /usr/sbin/grub-mkconfig using templates # from /etc/grub.d and settings from /etc/default/grub
[Code]...
I added rootdelay=10 and switched root from hd1,1 to hd0,0 as suggested elsewhere. Still no go, i jsut get dumped into ramfs shell with an error message saying that /dev/mapper/crunchbang-root doesn't exist.
I have buyed a dvd, but I can not play it. I've installed libdvdcss2 and libdvdread4 already. However, when I start Totem, it doesn't work. It says: "Could not read DVD. This may be because the DVD is encrypted and a DVD decryption library is not installed". I use debian stable (wheezy).
