Ubuntu :: My Experience Downgrading Ext4 File Systems
Jan 1, 2010
This post is not to ask for help, but rather to document my recent effort to downgrade my ext4 file systems to ext3 file systems. I don't know if it'll help anyone, but here it is anyway, fwiw.I am running ubuntu 9.10 on an older Dell GX-270, and had formatted my partitions with ext4 file systems. I began to notice partimage wasn't backing up my ext4 file systems and I decided to downgrade to ext3 file systems.My system has one 160GB drive and one 500GB drive. I also have an external usb2 500GB drive./home is on the internal 500GB drive. To convert it, I mounted an ntfs file system on the external drive, created a container file, put a file system on it, and mounted the container as a linux file system.
The backup was done done via rsync. rsync makes things really easy. It understands uids, gids, file permissions, and all kinds of links. That's one reason I created the container file on my external drive. NTFS doesn't understand uids gids, linux file permissions, or linux style links.
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Jul 12, 2011
i 've been using fedora 14,15 for like few months and i still have a 4GB NTFS partition win XP pro.i have installed fedora in about like 20gb for root and home ext4.i rarely use win xp nowadays (once in a week) considering i was using windows for like years.i have a commondata partition of about 130GB NTFS.i now dont want to use the windows and i want to convert the 130GB NTFS to ext4, but i am worried that if somehow at some point i crash my partition tables and i was using ext4 i wouldn't be able to recover the data as easily as i would in a windows.i want to know whether there is a reliable ext4 data recovery tool for fedora?igoogled and i found this link .. if any of you guys have used these tools can you share the experiences ?Mondo RescueTestDisk safecopy PhotoRecddrescue
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May 8, 2011
I recently upgraded to Ubuntu 11 and a few days later my ecryptfs filesystem began misbehaving in a weird way. In my home directory, many subdirectory names are duplicated verbatim. Here's an ls -F excerpt:
Desktop/
Desktop/
Documents/
Documents/
Downloads/
Downloads/
I can no longer access files in those directories (if I ls the directory, it appears empty; I can cd to it, but there's nothing inside). Not all of the directories are duplicated/damaged like this, but most are. A few non-directory files are also duplicated in this fashion, so for example:
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Jan 28, 2011
Can windows read files from a home file server with an ext4 file system? or do I have to partition the drive with the server (ext4) and an ntfs partition with the files on?
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Jan 29, 2011
How to get the permissions of any file systems
---------------------------------------------------
what does it mean?
"permission denied while opening filesystem"
through commands can we give/get permissions of file systems
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Jun 22, 2011
After an update recently I noticed that my process count jumped up quite a bit. Somehow it doesn't seem related (it was an apt update I believe), but I'll just throw it out there. All of the extra processes seem to be related to XFS and JFS file system kernel processes, but none of my file systems use XFS nor JFS, just EXT3 & EXT4. Is there any safe/easy way to kill off these processes and prevent them from re-spawning? I don't find having irrelevant idle processes to be beneficial nor efficient. It's using Ubuntu 10.04 64-bit. Only active file systems are EXT4 and EXT3.
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Nov 22, 2010
and also I need to find answers for following two questions.How to find mountable devices and their device files in Linux?How can I allow a regular user to mount a device in Linux?
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Mar 23, 2011
I have more than 60 ubuntu systems in my network. I want to copy files from one system to other ubuntu systems. All IP addresses are listed in a text file. So what command can I use to complete the task?
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Oct 21, 2010
I have 2 different mounts. One points to a local windows share(NTFS ->Samba) and the other one points to a PPTP VPN connection sharing(I belive that is NTFS too). I use "cifs" scheme in my fstab to mount these. And I use my Debian box to copy between these 2 mounts. I have started using Rsync for that purpose, I think that it works fine for now. My main problem is that it looks like Rsync cannot figure out if the files are same or not in source and target folders when I use these mounts. Most of the time Rsync copies the same files and folders over and over again even though those files and folders are on the target.
I am wondering if there is a way to make this scheme work? Being on a Vpn connection(slow) a Windows box, Rsync could have save a lot of my time if it could have recognized the files and folders that are same on both ends
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Jan 21, 2010
Last year I was looking into fault-tolerant distributed file systems and I recall one kernel-based system that required a physical partition on each machine in the cluster, but would treat it as a single volume - ie. a write on one server would appear on the disk on all the servers.Unfortunately I didn't bookmark the specific system I was looking at, and now a year later I can't remember the details.What I don't want is NFS - a single file server with a file system mounted on various machines. What I do want is mirroring - one disk shared among multiple servers, so that if one server dies, it doesn't make any difference to the rest of them.
A bit of investigation turned up Red Hat's GFS, which kind of looks like what I want, but looks more and more like an NFS model to me. I was wondering what everyone's opinion of the various options out there were.
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Aug 1, 2010
so here's what i want to do. I have a harddrive with Ubuntu 10.04 on it, the biggest partition is a 242gb ext3 partition. I want to format a part of that to FAT, without loosing any data from the hard drive.Is this possible?
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Mar 12, 2011
I have noticed the (understandable) tendency of new Linux users to think about disk drives in the 'Windows way'; their first thought is to exchange a new drive for an existing one, rather than combine both drives for a larger 'file system'.
There are times when replacing one drive with another is indeed the correct action (aging drive, failing drive, slow drive, etc). But in other cases it may be preferable to use the inherent strength of the fstab (file system table) file to combine physical drives to become a larger 'file system'.
Lets first look at a user with an 8 gig netbook who is running out of space. Rather than replace the 8 gig flash drive with a 32 gig device, the old and new devices can be combined to yield a 40 gig 'file system':
This same principle can be applied to a user with a computer using an 80 gig hard drive, and who 'adds' a new 320 gig drive instead of replacing the 80 gig drive with the 320 gig drive:
This same principle can also be applied to building a massive 'file system' without the requirement of using RAID:
The above 12 terabyte system can be built using a basic motherboard with four open SATA ports and four 3tb hard drives. No server based equipment is needed; no raid hardware or software is required. This is just something that Linux does (and does very well).
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Jul 4, 2011
I'm trying to install the 32 bit ubmbuntu 11.04 on my pc, and the installation freezes at the 'Detecting file systems' message. i have tried installing on a pc that had windows xp, and i also tried a clean install on a formtted hard drive, and i still get the same problem.
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Aug 6, 2010
I'm trying to figure out why files in linux are oriented in the folders the way they are. In Windows it's much simpler to picture. You have program files (C:Program Files(x86), system files (C:Windows), user settings for programs or personal stuff(C:User), and some weird folder names. I was noticing that the Ubuntu ext4 filesystem is a little more complicated. Some folder names are self explanatory, but others are not. Is there a guide, or some reading material on the history of the linux filesystem and how it morphed into what is presently used in Ubuntu?
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May 26, 2010
I have fedora12 on two pc's, i want to share some files between them which i was not able to do with nfs, so let me know the whole procedure to do that n also let me know where my shared files will be visible
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Jan 31, 2011
during the boot process mounting other file systems takes a while. Although it ends up resulting [OK] it was not like this before and it used to be was very fast. I took a look at /etc/fstab file which is posted below, and suspected that devpts is the problem. So I commented it out and reboot, but it wasn't helpful.
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Oct 5, 2010
I'm familiar with the software and hierarchy of the mount command but I can't find any info on why it is needed or preferred. What are the physical aspects of it? What is the burden of having files accessible all the time?
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Jul 23, 2009
I was wondering if it was possible to hide the File Systems from a user. So when then browse through folders or choose to save something the default folder is their "home" folder. I am using SAM Linux distribution and don't want my users to be able to screw anything up! I use thunar as my file manager and was just wondering if it is possible?
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Apr 29, 2011
I have to move files between two file systems /inst and /inst2.When I perform 'cp -a /inst /inst2' it copies everything even hidden files and preserves access permissions.But when I perform 'mv /inst /inst2' it also preserves access perms and moves everything besides hidden files.Questions :hy is so ?What tool to use when moving file systems from one fs to another (rsync) ?
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Jun 19, 2010
I have 3 linux systems configured for running applications in each, named system1, system2 and system3. I have around 100 GB of space in system3 under /usr but not much being used. In System1 very less space is there but mostly hits coming here and need to have proper backup, as the system1 is quite old and not planned partitons properly. So I want to use a disk having more space for backup requirements.
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Apr 30, 2011
We have upgraded CentOS release 5.6 (Final) with 2.6.18-238.9.1.el5 kernel. After the reboot all configuration files under /etc became READONLY. my file system's still in rw mode.code...
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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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Dec 19, 2010
if this a simple question I apologise, I'm using a SSH connection to a remote machine which also has ubuntu installed, my remote machine is connected to a windows server, using <places> <Network> and clicking on the server, doing this mounts the server into my remote file systemWhen i look around the file system of the remote machine i'm unable to make the windows server resource available to me.I Assume it has a service file in the /dev directory, but would not know what its called or what i would have to do with it.In the mean time i've managed to connect directily to the server from my local machine, (which is probbialy a better solution) but is it possible to see the server via my remate machine?
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Sep 29, 2010
iv been looking around at the different Linux systems particularity the smaller ones such as DSL, Slax and Puppy Linux. However i need a Linux distribution that doesn't have a GUI desktop environment just the plain old terminal to work on. The system would have to be able to boot from a USB drive also. If anyone knows a systems that fits those requirements or something else related please post. Also what file system is best for USB drives for booting systems?
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Jan 14, 2010
We recently had an issue with "cat /proc/mount" telling us that a CIFS file system was mounted, even though the mount was not working correctly. So we're not sure if we can trust linux to report malfunctioning mounts, so we're planning on adding a specific file on the mounted file system, and verify the mount by reading this file from the client side (linux). If linux fails to read it, we know that the mount have failed. But before we go ahead doing this I thought I'd just hear how others are doing this sort of thing - how do you make sure that mount points are up and working?
- kenneho
EDIT: I just saw that I've posted in the security area, not in the server area. How do I move it?
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May 12, 2010
For some reason, my downloads on Windows are really slow no matter what download accelerator I use. I've tried IDM, FDM , DAP , DAM , Orbit , Supersonic , jDownloader - they all have some problem . Sometimes the files just halt and refuse to be downloaded.
Warning : Not For Advanced Users!
On Ubuntu though I have found a wonderful solution that sees me all the time maxing out my download connection and often exceeding it with absolutely no problems.
Here's the combination :
Aria 2 + Flashgot.
I will show you how to set it up, how to configure it and how to pause , resume downloads.
That's all one needs!
1. To get started , let's download Aria 2.
Fire up a terminal and enter
Code:
sudo apt-get install aria2
2. And now Flashgot : Install the add-on from this site: [URL]
Close Firefox
3. Now to choose Aria 2 as the default download manager
Open Firefox
Tools
Flashgot -> More Options -> General Tab and select Aria 2.
4. Now in terminal:
Code:
cd
mkdir .aria2
Now create a file called aria2.conf inside .aria2( which is a hidden folder can be viewed by pressing Ctrl+H in the Home Folder)
Code:
cd .aria2
gedit aria2.conf
5. Open the file and type split=100 on the first line. That does it . Now to download anything say for example a video from ..... : [URL] in the bottom right corner click the flashing icon ( Flashgot Media) or alternatively go to Tools->Flashgot->Flashgot Media
6. Your download will start after selecting a download folder. A window will open which will display progress. To Pause , press Ctrl+C.
7. To resume open History, navigate to the page and again click 'Flashgot Media'
The file will resume.
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May 19, 2010
No matter what desktop I use, there are 5 nepomuk processes and one virtuoso-t process running, taking up quite a lot of CPU in total. These stupid things have been ruining my Ubuntu and KDE experience ever since I upgraded to 10.4. I want to have those things NEVER run again, no matter what they're for, preferably by editing a config file because using graphical settings in KDE hasn't actually disabled them.
EDIT: If I kill the process nepomukservices, it keeps coming back! Who does that??? I installed KDE 3.5 now (instead of the very bad KDE 4). I have no setting to disable desktop search, because the brilliant and good KDE 3.5 has no such useless, CPU hogging, feature. But somehow the evil KDE 4 still manages to hog down my system by keeping to spawn this nepomukservices process all the time even when I'm not logged into KDE4 at all!
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Mar 29, 2010
I've already asked this in the mythbuntu and didn't get an answer there so I'm trying here. OK just added another 2Tb WD drive to my mdadm controled RAID5 array, and the reshape is finished:-
Code:
Code:
Mar 28 18:28:36 alpha2 kernel: [104357.343421] md: md1: reshape done.
Mar 28 18:28:36 alpha2 kernel: [104357.525114] RAID5 conf printout:
Mar 28 18:28:36 alpha2 kernel: [104357.525119] --- rd:4 wd:4
Mar 28 18:28:36 alpha2 kernel: [104357.525122] disk 0, o:1, dev:sda2
[code]...
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Jul 31, 2010
Windows 7 by default cannot read/mount Ext4 type file systems. I installed Ext2fsd which allows me to mount my linux drive and navigate all the subfolders of my root (/) directory, however when I click on a folder from there (I.E, /home) this is what comes up: [URL].
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Nov 1, 2010
does the ext4 journalling file system need to be de-fragmented?
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