Software :: Encrypt Ext4 After Install?
Dec 8, 2010
I want to know if it is (a) possible to encrypt my Linux ext4 file system after I have installed the OS? (b) what is the best method/application to do this?Ubuntu gives an option to encrypt the partition via the installer. I would only like to encrypt the partition and not the drive because there are other partitions/OS's. I feel this is a necessary procedure for my portables (laptop, netbook) if they are stolen. I am predominately using Ubuntu 10.04 i686 with the ext4 filesystem.
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Jan 6, 2011
I want encrypt my fedora file system.
How to i can encrypt ext3 or ext4 file system.
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Jan 8, 2010
I Have shell script like this
Code:
#!/usr/bin/expect
set password "XXXXXXXX"
[code]...
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Apr 6, 2010
have the home directory encrypted after the initial installation? I know on a clean installation you can set this up.However, is there an easy way to do so after? Ubuntu Karmic x64
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Apr 23, 2010
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.
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May 19, 2010
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
[code]....
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Sep 16, 2010
I just trying installing OpenSuse 11.2 on a Dell Dimension 4500 2.0 Ghz with 512 mb memory and 40 gb hard drive.During the installation the following error was produced: "System Check for partition /dev/sdb1 contains no valid Ext4 file system". After the install process was completed, the keyboard and mouse were not useable
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Dec 22, 2010
I am looking for something like Ubuntu does (or claims to do :-) ): encrypt the home folder so that, once done, you can even forget that it ever was encrypted.
I have had a quick look to encfs, and to the KDE "right click menu"; but, when dealing with folders, it seems that they pack them into a single file and then encrypts it (if I have correctly understood).
So, what is the way of encrypting the home folder (and subfolders) as Ubuntu does? (and so that you can completely forget afterwards)
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Dec 18, 2010
I am trying to set up an atom D525 low power PC 64-bit with a 40 GB solid state disk drive. Is it possible to specify ext4 during the install for proper SSD suupport? I read somewhere that after install I can place a -discard line in fstab to enable trim.
Edit: should I have asked this in the x86_64 forum, as I was planning on installing 64 bit?
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Jul 2, 2010
Thinking of a re-install to remove LV and use Ext4 only. [Root is too large] Can I back up Home from the LV and move it to an external drive. If so will I be able to reinstall and Custom partition so I can use Ext4 and then copy the Home files back to my new Home partition. I have only a small knowledge of LV systems so just want to be carefull.
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Jun 9, 2009
I booted into the Fedora 11 on my netbook, and used the desktop icon to install to hard-drive. I specified to use "Free space", and hit next. From there, it just stalls. The "Install Fedora" window does nothing, and I'm going on a half-hour now of nothing.
Tried three times, still nothing.
The first time I tried, I chose to replacce old linux installation (ubuntu), and when I told it to install Fedora 11 root as ext4, it said the boot can't be ext4... so I chose ext3 and it said root device must be ext4...
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Feb 23, 2010
both root and home partition have suddenly become corrupt, and the repair tool from the installation disk just loops (Do you want to repair? Yes! Do you want to repair? Yes! Do you...).
Code:
[ 54.209685] ata1.00: exception Emask 0x0 SAct 0x1 SErr 0x0 action 0x0
[ 54.209758] ata1.00: irq_stat 0x40000008
[code]....
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Mar 24, 2010
After installing the recent kernel update and rebooting my machine I have found a horrible fact, my computer won't boot anymore. It seems my root partition was corrupted, and running fsck on it just sends me through a endless loop of "Ignore Errors {y}:" and "Force overwrite {y}:". I have already tried the use the repair system on the installation DVD but that doesn't do anything, the pop up asking if I want to repair the file system keeps coming up when I click repair.
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Apr 17, 2010
My openSUSE 11.2 system has periodic running of fsck disabled for ext4 filesystems (Maximum mount count = -1, Check interval = 0). What is the reason for this? Is it because fsck is not necessary on a periodic basis with ext4, and only necessary when errors are detected? Or is it because fsck has problems working on ext4 filesystems?
The ext3 filesystems do have it set (Maximum mount count = 500, Check interval = 5184000 (2 months)). I would like to know why fsck is not set to be activated for ext4.
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Jun 2, 2010
I was unable to boot into my system after I'd just shut it down, so I tried repairing it using my installation media... only to find that though my root Ext4 fs on sda6 was corrupted & *supposedly* repairable, the cd could not do so for some reason! All I can get is a command line, saying something about the root fs being mounted as read only, and I have no idea how to resolve this. I cannot afford to loose ANY of the data I have on here.
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Nov 11, 2010
I have done it quite often. Inserted and run the computer from a live CD so that the hard drive is not mounted an changed the partitions. It worked on the old reiserfs when I wiped the windows partition on my laptop to increase the space, it worked on ext3 partitions. Now I resized the swap partition and reduced the NTFS partition on my desktop - no problem. But it does not increase the ext4 partition. No error message it just does not do it. I tried several times with the suggested maximal setting, with a custom setting, etc. It just does not change size. Just for interest I booted into Suse11.0 live CD and tried from there. There I get the answer cannot resize partition as the file system does not allow resizing. Is something wrong with the system or does the partitioner not work with ext4?
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Jan 1, 2011
I have a system running OpenSUSE 11.3 using the bare server configuration.I had a partition for my /srv directory. All was fine until earlier today. I shutdown my system (to remove an old floppy drive from it). When I rebooted, /srv is emtpy (no files nor directories). This is somewhat vexing, as I had several sites running from there, as well as a fair amount of data.The appropriate partition (/dev/sda3) appears using fdisk. However, there is no mention of it in /var/log/messages.Does anyone know how to recover an Ext4 partition?
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Mar 18, 2011
I have a very simple question I am creating a new partition for storing files, installers, documents, etc, I am going to make it ext4, now my question is, do I have to specify a mounting point?? I would not like to do that, but if I do not specify a mounting point, will I be able to access that partition? So in what cases you specify mounting point and when you do not specify mounting point?
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Sep 2, 2011
Tired of fat32 fragility, I reformatted a 4GB pen-drive as ext4 using Yast's partitioner. I chose format as ext4 and checked fstab options "can be mounted by user", "no access time" and "ordered journaling". I thought that these fstab options would be ineffective since a removable device won't be added to fstab. when I insert the pen-drive it auto-mounts and the folder /media/EMTEC is created (EMTEC is the volume name). The relevant mount entries are:
Code:
:~> cat /etc/fstab | grep sde
:~> cat /etc/mtab | grep sde
/dev/sde1 /media/EMTEC ext4 rw,nosuid,nodev,relatime,barrier=1,data=ordered 0 0
:~>
There's no fstab entry, as it should be, and there is a mtab entry corresponding to the pen-drive, /sde1. However the /media/EMTEC as created (by udev, I suppose) is owned by root, I can't write to it. But if I change (as root) the /etc/EMTEC folder permissions so it belongs to the regular user, i can (obviously) write to it *and* it stays so *between* remounts. Haven't tried a reboot yet. What I'm not sure is if ordered journaling is OK for a pen-drive - or any kind of journaling, for that matter. Or will this significantly decrease flash memory life? Also, the fstab options set in Yast appear to be remembered by whatever creates mtab, as well as /media/EMTEC permissions. Is that so? Where are these settings kept? How does this work?
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Jan 14, 2010
I was wondering if it's somehow possible to install the Live USB to an ext4 partition, this because I have a 4gb filesize limit on fat32 and that means I cannot make the casper-rw any larger. And next to that I can decently manage permissions on that.
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May 29, 2010
I haven't used linux for a long time, after this break i wanted to install ubuntu and give it a shot but altough that i have a 10gb free space and another seperate 2gb free space for a possible linux setup, installer can't seem to recognize them.
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Jun 10, 2009
I have installed grub.efi in the ESP partition which is able to load ubuntu 9.04.I think it works with fedora 11 x64 as well. And I tried to install fedora in the partition which was used to install ubuntu. But the installer keep telling me that ext4 partitions are not bootable. But I don't need to install a boot loader on that partition
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Jan 4, 2010
Sometimes openSUSE boot ends with these errors:[url]
(I do not know why it prints an error on Ext2 filesystem when the disk is formatted Ext4...)
[url]
Here is my Fstab:
Code:
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Feb 5, 2010
I am dual booting OpenSUSE and Windows 7 Pro x64. Each OS is installed on a separate 1Tb hard drive. One question that I have tried to Google for a solution with no success is, how do you access ext4 from Windows? Shortly after I installed OpenSUSE, my OpenSUSE hard drive "vanished" from Windows 7. aturally, I can access all my hard drives from OpenSUSE, which does support the NTFS. I am quite sure that I am not the only person who has this problem as I know that dual booting Linux and Windows is quite common.
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May 1, 2010
I installed opensuse 11.2 some 6 months ago as an alternative to windows 7, on a 44GB partition. Having become my primary OS, I am looking forward to expand the ext4 partition from 44GB to the maximum possible. I have some 24GB unpartitioned space, and free space on NTSF partitions (one of which could be deleted if necessary). What is the best and safest procedure to perform the partitioning.
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Feb 14, 2011
I'm migrating my OpenSuse 11.3 (which was update from 11.2, 11.1 ........ ) to a new hard drive. My partitions were reiserfs and in the migration I'm "converting" them to ext4, the conversion process is simple and it works fine for all of them except the root one:
1) I create a new partition on the new hard disk (bigger than the original one)
2) I format it with ext4
3) I copy all the data with cp -a from the original partition to the new one
I already have all the partitions migrated to the second disk, then I have tried to do it with the root partition:
-I've booted with a system rescue CD and I've done !9 2) and 3) with no problems.
-I've edited and changed al entries in fstab and grub conf (menu.lst) to point the new partitions
-I've reinstalled grub and it seemed It will be no problems booting, but
It begins booting, the grub menu appears, It begins booting the kernel, but suddenly:
waiting for /dev/root to appear: OK
fsck.reiserfs -a /dev/sda2
........
mount -o ro,ad,user_xattr -t reiserfs /dev/root /root
and it fails, because sda2 is not reiserfs, but why does it try to mount it as reiserfs if I'm not saying anywhere it is reiserfs?
This is my fstab:
Code:
#/dev/disk/by-id/ata-ST3160211AS_6PT0V05Y-part2 / reiserfs acl,user_xattr 1 1
/dev/disk/by-id/ata-WDC_WD5000AADS-00S9B0_WD-WCAV91599607-part2 / ext4 acl,user_xattr 1 1
/dev/disk/by-id/ata-WDC_WD5000AADS-00S9B0_WD-WCAV91599607-part1 swap swap defaults 0 0
/dev/disk/by-id/ata-WDC_WD5000AADS-00S9B0_WD-WCAV91599607-part3 /home ext4 defaults 1 0
/dev/disk/by-id/ata-ST3500630A_9QG94AT1-part1 /mnt/backup auto noauto, defaults, users, exec .....
I've booted it also with SuperGrub2 disk and the same thing happened, so I think it's not a grub problem but I don't wknow why it tried to mount the root partition as reiserfs.
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May 22, 2011
I would like to ask you if there is a robust way to mount as a drive a ext4 partition inside windows 7 and if it is possible to use it also to storing window's 7 data.
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May 12, 2011
Kubuntu 10.04, i386, new install. Can't access EXT4 partition on same HDD. Celeron, desktop.
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Jun 15, 2009
I live in a country where 1Mbit broadband is a premium service for large businesses. I am paying a little over $40 a month for a 128k connection with monthly capping. I want to download Fedora but the download is just huge for my connection, especially as it is used for work 14 hours a day. I have attempted the LiveCD and got the 'ext4 cannot be used for boot' error. I also have several other specialised distros on this machine and it's going to be a pain inserting a new boot partition just for Fedora.
Like it is possible with Slackware, can I just download the first CD of the Fedora 11 set and get a minimal install from this or does Fedora need the whole set of disks? Is there a simple enough net install option that I could use instead? I can't understand why they can't just release something like Ubuntu's alternate install CD.
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Apr 20, 2010
telling me if this behavior of my openSuSE 11.2 installation is normal? I use a 64-Bit openSuSE 11.2 with kernel 2.6.31.x with root partition ext4. After adding and updating from repository kernel:/HEAD/etc to 2.6.34-rc4 I can not boot anymore due to a lack of module ext4. I thought today ext4 is stable and fix built-in in the actual kernel releases, isn't it? The error message at boot time: FATAL: Module ext4 not found. Which is right because in /lib/modules/<kernelversion>/kernel/ there is NO 'fs' subfolder. Isn't the kernel:/HEAD/ repository the official update path to get a newer major kernel? (besides openSuSE's Updates for security reasons) Do you know how I can fix it without self-compiling?
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