Questions dealing with Ubuntu's layout of files, permissions, and files that reside in special locations on disk.

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3
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0answers
302 views

mystery of missing file modifications (hybrid drive + Ubuntu 12.04)

Last week (Sep 10) I worked a whole day (on my Ubuntu 12.04 HP elitebook 8530p laptop) using a tex editor (TexWorks) and Jabref to maintain a Bibtex library. Today however I noticed all my ...
2
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0answers
63 views

Difference between FUSE and VFS in linux?

What is the difference between VFS [Virtual File System] and FUSE [File System in User Space] in linux. I think, most of the popular OS today support VFS feature. I recently had a chance to go through ...
2
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0answers
256 views

Why aren't my changes to /etc/security/limits.conf having effect?

I am trying to provide support for core dumps on my Ubuntu machine (as by default they are disabled). So I have made the following changes to /etc/security/limits.conf: root hard core 1000 After ...
2
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0answers
207 views

A Linux container can use an authorized_keys file outside my home directory, but ephemeral containers based on it can't. Why?

In Ubuntu 12.10, I've created an LXC of type 'ubuntu' using the lxc-create utility. I then create ephemeral containers based on this container using the lxc-start-ephemeral utility, and I need to ...
2
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0answers
96 views

Does enabling ACLs have an effect on performance?

I'm looking at a web application that needs ACLs enabled. Are there any benchmarks or other documents to show what potential impact ACL does{n't} have when the file system is under heavy load? Also, ...
2
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0answers
301 views

No filesystem could mount root

I am trying to boot a linux kernel 3.7.0 on virtualbox and it keeps telling me the same message: "No filesystem could mount root tried ext3 ext4 vfat fusebk". I put append root=/dev/sda in my isolinux ...
2
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0answers
185 views

What is an appropriate way to install Lustre on a ubuntu 12.10 cluster

I have a 24-nodes cluster installed with Ubuntu 12.10. What is the suggested way to install a relatively new Lustre version on such a cluster?
2
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0answers
275 views

Auto-mount filesystems on boot fails (12.10)

I have a Compaq HP 8200 slim desktop running 12.10 with encrypted partitions (set up with the text-based installer). Everything's working fine, except... When I boot the computer, my /boot and ...
2
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0answers
480 views

Ubuntu 12.04 - syslog showing “SGI XFS with ACLs, security attributes, realtime, large block/inode numbers, no debug enabled”

I have been seeing these random logs in syslog on our production system. There is no XFS setup. Fstab only shows local partitions, only EXT3 . There is nothing in crontabs either. The only file ...
2
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0answers
652 views

Google Chrome causing file system to mount as read only

So disclaimer, I am using Lubuntu 12.04 but I'm almost certain it shouldn't make any difference. Earlier this week I resized my lubuntu partition on my harddrive with GParted to be 25 GBs smaller, ...
2
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0answers
286 views

Why don't I have permission to read files on the CD I bought?

I recently bought this book, which came with an accompanying CD. When I try to view the contents of the CD in Ubuntu, I don't have read permission for any of the files. ls -al in the root of the CD ...
2
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948 views

Setting up group disk quotas

I am hoping to get some advice in setting up disk quotas. So, I know about: Adding usrquota and grpquota on to /etc/fstab for the file systems that need to be managed. Using edquota to assign disk ...
2
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0answers
247 views

Mounting encrypted file system on Windows

Is there a way to mount (read/write) an encrypted file system on Windows? By "encrypted" I mean whatever it is that Ubuntu does to encrypt a file system when you choose that option during formatting. ...
2
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0answers
257 views

Why Is 32-bit Ubuntu Folder Size Much Larger Than 64-bit Version?

I noticed this when sync'ing a folder with hundreds of thousands of sub folders from my local 32-bit Ubuntu (10.04, ext3) to my remote 64-bit (10.04 ext3) VPS. The size of the local directory is ...
1
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0answers
37 views

How to change the default block allocation policy of a file system?

Every file system has some default block allocation policy. For instance unix file system scatters the blocks of a file randomly on disk while ext2,ext3 allocates blocks of a file in block groups. Is ...
1
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0answers
13 views

files are hiding automatically in between Ubuntu 12.04 and windows 8

I have installed both windows 8 and Ubuntu 12.04, in separate drives. i am using 2 other drives commonly between 2 OS to store the data. if i copy or use those files with Ubuntu,later if i tried to ...
1
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0answers
40 views

Ubuntu 12.04 ext4-fs error/inode

I am running a Dell PowerEdge T420 with Ubuntu 12.04 32bit. The hard drives are a RAID1 setup. Last week, I began getting errors that cause the build I am running to fail. I found this in the log ...
1
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0answers
26 views

Resizing Xubuntu patrition

Ok, here is the problem. I have a Xubuntu in Virtual box. I have resized the machine HD and added the missing space using GParted to the patrition as seen in this picture: After resize the new size ...
1
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0answers
30 views

Files not readable on Windows

I have a video server running Ubuntu 12.04.3 LTS, which works fine for what I need it to do. Although, as it is a video server from which I stream movies to my Windows machine, that's what I expect ...
1
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0answers
8 views

Does encrypting home folder during the installation also encrypt other user's home folder after the fact?

If I were to select the option to encrypt my home folder when installing Ubuntu, then does Ubuntu automatically encrypt other user's home folder that I create after I installed Ubuntu?
1
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0answers
18 views

Monitor all changes a program made during the installation

Ubuntu 12.04 64 I would like to monitor all changes a program make to my system during the installation and first startup. Is there any solution how i can monitor this? I checked out "iwatch" and ...
1
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0answers
114 views

How to store LXC container's files in another folder

Well the answer seems to be given on https://help.ubuntu.com/13.04/serverguide/lxc.html#lxc-hostsetup page under Using a separate filesystem for the container store title but it doesn't work for me. ...
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0answers
32 views

Ubuntu: Files Deleted Abruptly. HDD Space is still Full. Ubuntu 13.04

Somedays ago I was trying to open some file. It shown some error like 'Can't Read the File'. I ignored this completely. Then Today to see what has happened I restarted my system. To my astonishment ...
1
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0answers
192 views

Recover an overwritten file

My project c source code file became corrupted while making the tgz of the file. I wanted to make *.tgz of 4 files. The file names are common.c, common.h, myfile.c and myfile.h. I mistyped the tar ...
1
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0answers
34 views

Can't boot anymore, get a message on ubuntu purple screen

A friend has a Compaq laptop with a broken screen, so he use an external screen with HDMI and use Ubuntu 12.04 LTS. But after a while after he started the computer, the screen finally show up with ...
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178 views

Permission denied creating file on Ubuntu Server (Amazon EC2 instance)

sudo has been working fine for installing applications and running scripts, but when I try and create a file I am getting a "Permission Denied". I have tried: sudo cat > file.conf and sudo echo ...
1
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0answers
174 views

How do I get rid of a corrupted filename ( / inside ) in ext4 home mount point?

/home sudo ls -l rubish ls: can't access rubish/tongue/gif: none file of folder of that kind total 0 -????????? ? ? ? ? ? tongue/gif I could move the folder to the top of /home but I ...
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0answers
67 views

“Different filesystems on the same disk” issue on Community Ubuntu Documentation guide

Reading the Partitioning/Home/Moving guide (about to move my /home to a different partition), I came across this notice: If you're moving from Windows and your new home partition is going to be an ...
1
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0answers
53 views

How to organise my files?

For my work I need to write a lot of small programs that read some date from some files and generate other files that are read by other programs and so on. Very quickly the structure becomes so ...
1
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0answers
240 views

Filesystem locks up (read-only) after HDD -> SSD clone, no sudo access, no applications

I recently cloned my old HDD to a new smaller SSD and something must have gone wrong. Windows 7 works absolutely fine, but Ubuntu 12.04 has issues - at first, it works normally, but after only a ...
1
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0answers
132 views

Is it possible to extend filesystem using network drive?

I'm running very low free disk space on my file system. Is it possible to extend file system size using network drive (using LVM or similar) Preferably I would like to use Google drive (There is ...
1
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0answers
181 views

Not Able to boot after installing Ubuntu 12.10 and 12.04

I am using an Intel based Acer laptop and the first time I installed Kubuntu 12.10 I got a blank screen. After this I tried Ubuntu 12.04 but the result is the same. I tried many times but the ...
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0answers
1k views

Errors during start-up: “Scanning for Btrfs filesystems”

I have installed Ubuntu 12.10 desktop on three systems and one virtual machine. On every system I have opted for a single Btrfs partition. During start-up I get the following two error messages. It ...
1
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0answers
136 views

file acess slow after deletion of many files

I recently accidentally created millions of files in one folder (rougly 5 million) and due to limitations I couldn't process them correctly (maximum argument count exceeded for wc / ls and such ...
1
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0answers
522 views

NTFS partition not clearly unmounted PLEASE HELP

When ubuntu boots, I get this error: The NTFS partition was not cleanly unmounted. This probably indicates that the system was not shut down properly. Please run chkdsk /r from Windows; once ...
0
votes
0answers
11 views

inspect a storage device file system structure

I am trying to understand the different file systems ,FAT ,EXT and NTFS .But I think that it is difficult without a way to see and examine with my eyes.So is there a tool that could help me .I mean ...
0
votes
0answers
43 views

My Private folder has become empty

I don't really know what happened. I just meant to change all the names of the folders in /home so that the first letter of all of them would be lower case. I did it with the command bulkrename of ...
0
votes
0answers
19 views

Can use of symlinks be circumvented?

I am trying to download Android source from Git repository. I would require a lot of free space on my home folder to download the whole source and build it. So I decided to download the whole source ...
0
votes
0answers
31 views

Trying Ubuntu from live DVD: hangs and/or gives “unable to find a medium…” error

I have an older desktop (general specs below) that I want to "Try Ubuntu" (12.04.4, i386) on using the live DVD before I install. However, I'm having several issues. The first few times, after ...
0
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0answers
3 views

Distributed share storage across WAN

I'd like to build something which looks like "BranchCache" in Windows Server with Ubuntu. That is : - publish/share a folder on an Ubuntu Server in site A - have a user located in site B access the ...
0
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0answers
19 views

The number of file descriptors is limited by your shell

i am trying to start Informix server. i am getting error when i run command ./oninit .error is The number of file descriptors is limited by your shell . can any one please guideline how to remove ...
0
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0answers
25 views

ecryptfs mounts as read only

I did the following (http://haridas.in/how-to-put-encrypted-contents-on-cloud-storages.html), and after mounting, the mounted dir is read-only filesystem: I created two dirs: one to /home/user/dir1 ...
0
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0answers
36 views

Ubuntu 12.04.4 ext4 filesystem, excessive overhead

I'm experiencing a baffling problem with two 12.04.4 servers I've just installed - there is what appears to be excessive file system overhead for anything I save on its folders; for example, a single ...
0
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0answers
89 views

error: unknown filesystem; grub rescue

yesterday there was a power failure at my house and when i turn on my desktop, i had problems with user permissions on linux. I restarted linux and then, while booting, it gave me that error described ...
0
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0answers
24 views

how to make the compressed filesystem smaller

I'm trying to make an image of my currently installed Ubuntu using relinux. I'm working on Ubuntu 12.10 and my machine is dell inspiron I've followed this video ...
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0answers
26 views

wrong file system type passed to fsck

My Ubuntu hanged today while it was downloading, as it was unresponsive for long i shut it down forcefully . Later when i switched it on, it was not coming up so i used a live cd to fix the file ...
0
votes
0answers
34 views

My encfs folder three times larger than original

Recently I've noticed sudden grown of size of my encfs folder. Size of data 2.3 Gb, size of encfs folder is 6.6 Gb. What could cause this? This is how mount output looks like: /dev/sda6 on / type ...
0
votes
0answers
47 views

Linux name sorting order?

In Windows I could name a folder foobar as _foobar and it would appear on top of a sorted list in the file explorer. What prefix should I use for the same effect in Linux. And what is the default ...
0
votes
0answers
45 views

Datarecovery Attempt to read block from filesystem resulted in short read while opening filesystem

I have following problem: i accidently deleted some files on my ubuntu. When i try to use debugfs to recover my files i get following error: Attempt to read block from filesystem resulted in short ...
0
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0answers
8 views

Finding out what files are missing on my computer

Something weird has happened to my Ubuntu and some files are missing. Syslog says: syslog Now I wanna find out what files are missed or preferably even damaged. I think there must be some way doing ...