A filesystem is a way to organize and store computer files with their data.

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6
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842 views

Recover deleted file that is currently being written to

I started downloading a big file and accidently deleted it a while ago. I know how to get its current contents by cping /proc/<pid>/fd/<fd> but since the download is still in progress ...
8
votes
3answers
3k views

Which Linux file systems for USB sticks?

For Linux desktops, when Windows compatibility is not an issue, which file system is preferred for USB sticks? For example ext2, ext3, ext4, btrfs, nilfs, or even NTFS? Would journaling wear them out ...
5
votes
2answers
491 views

Testing ext3 filesystem on embedded device [closed]

My set up: An embedded device with flash memory on it. Flash is partitioned into ext3 filesystem partitions. Have busybox on it. My Goal: To uncover errors /bugs/ problems on ext3 filesystems. ...
5
votes
4answers
7k views

Why can't I copy my DVD with dd?

I tried dd, dd_rescue and ddrescue, all failed. I thought these tools bypass the filesystem and make a bitwise copy. dd is fooled, it finishes but just produces a small file and states it's finished. ...
6
votes
4answers
4k views

Case-insensitive file system for production server?

The initial situation looks like this: The corporate software is PHP-based. It is delivered by Apache 2 on a Windows 2003 Server. It is big. It is a legacy of rather unprofessional developers who ...
5
votes
3answers
9k views

How to Expand LVM2 Partition in Fedora Linux

I've been using Fedora 15 on a VMWare virtual machine. Over time, the disk space I initially allocated for the file system began to run out, only 12GB left. I've expanded the disk space an extra 25GB. ...
12
votes
1answer
1k views

What does the following kernel message mean?

The following appears /var/log/messages, what that means ? Feb 19 22:51:20 kernel: [ 187.819487] non-matching-uid symlink following attempted in sticky world-writable directory by sh (fsuid ...
1
vote
2answers
825 views

Embedded device: How to do raw reads and write to flash (emmc/movinand) bypassing file system cache

I have an embedded device with a flash memory running linux. I want to do raw read writes on the flash part but I also want to avoid any file system cache. How can I do this? Any pointers?
3
votes
3answers
1k views

Which file system to choose for small sized files?

I have a partition and it has ~100 GB of audio files. Most of them are mp3 or ogg, each has size of ~15 MB. I update it on a weekly basis. Right now, the partition is formatted as ext4. I have read ...
3
votes
1answer
1k views

Create iso image of ext3 type

I want to create an ISO image which can be mounted with an ext3 partition type. How can I do that? I am using this command: [root@manage upload]# dd if=testParti.txt of=./diskImage.iso 41+1 records ...
28
votes
8answers
14k views

Is there a file search engine like “Everything” in Linux?

On Windows there a nice file search engine called Everything, which is (unlike find) very fast and (unlike locate) always returns up to date results. AFAIK it works by filling a database from the ...
5
votes
2answers
241 views

What is “blocking” in reference to file I/O?

My textbook mentions it but doesn't specifically define it. From the context it's used in (in this example, pipes), I take it to mean that if one end of the pipe blocks, it's temporarily "disabled", ...
2
votes
2answers
409 views

Simultaneously move long list files to new location

I'm using a wonderful program called ExifTool to recursively rename a large batch of files. Here is example usage: $ exiftool -r -ext JPG '-FileName<CreateDate' -d %Y%m%d_%H%M%S.jpg . Error: ...
3
votes
4answers
2k views

In Mac OS X Snow Leopard, how can one file's permissions be matched to another?

I need to make the permissions of a file exactly match the permissions of another file in OS X 10.6. I don't see 'getfacl' or 'setfacl' as suggested in some other posts for Linux. And, it doesn't ...
2
votes
2answers
906 views

Too many open files in system in FreeBSD 9

I just installed FreeBSD 9 version with GNOME interface. Each time I want to open a folder from root a message box pops up and warns me with this message: Too many open files in system. What is the ...
12
votes
2answers
1k views

Is there a tool to visualize a filesystem allocation map on Linux?

May you have ever used filesystem defragmentation tools (like Norton SpeedDisk or Piriform Defraggler) on Windows, you have probably seen such a diagram: It displays a filesystem sectors map, ...
62
votes
5answers
45k views

Can I configure my Linux system for more aggressive file system caching?

I am neither concerned about RAM usage (as I've got enough) nor about losing data in case of an accidental shut-down (as my power is backed, the system is reliable and the data are not critical). But ...
6
votes
2answers
22k views

Mount device with r/w access to specific user

How can I mount some device with read-write access to specific user?
4
votes
2answers
3k views

Not enough space on / to install new kernel update

During a recent update I received this: Installing: kernel-default-2.6.37.6-0.11.1 [error] Installation of kernel-default-2.6.37.6-0.11.1 failed: (with --nodeps --force) Error: Subprocess failed. ...
2
votes
1answer
1k views

skype not found on Oneiric 64, but it is right there [duplicate]

Possible Duplicate: Can't execute some binaries in chroot environment (zsh: Not found) I have something weird here. Cannot find a file although it is right there. $ skype command not ...
6
votes
1answer
6k views

bash force copy over same file

Our sysadmin has created a backup system that creates snapshots of the hard drive. When I try to restore an older version from the snapshot: cp /path/to/snapshots/foo.bar /path/to/folder/foo.bar ...
0
votes
1answer
113 views

How to create an FS under SunOS?

So there is a global zone, and we need to create an FS on a non-global zone. Also we need the new FS in a new DG/Volume inside the DG of the zone (if we see it from the global zone). How to do it? ...
1
vote
1answer
662 views

Mounting Remote Filesystem over SSH as a Different User

Due to a breach of security, the administrators of the work server have implemented a new method of security. To log into the server, we must log in as our own user (which has severely limited ...
5
votes
2answers
529 views

Can I move a directory with open files?

Imagine a bunch of processes using a /home/user/logs directory. They have some logs open for a longer time.
4
votes
1answer
3k views

The volume “boot” has only 0 byte disk space remaining

I am in Ubuntu 10.04. When I install the software updates with "Update Manager", there is a pop up dialog which tells me "The volume "boot" has only 0 byte disk space remaining" How to get rid of ...
3
votes
2answers
1k views

How to understand the filesystem concepts used by encfs?

I do not hold a deep understanding of computer science concepts but would like to learn more about how the utility encfs works. I have a few question regarding the concept of filesystem in regards to ...
5
votes
3answers
3k views

Directories with binary files in Linux

I noticed that when I install new application there are a few possible directories where the resulting binary file will be placed. You can install with packaging manager, compile with make, ...
5
votes
2answers
6k views

file block size - difference between stat and ls

I've noticed that when I do a: ls -ls file It provides block count, say 8 blocks. When I do: stat file I notice that the block count is 16, twice the number given by ls. The block size on my ...
20
votes
3answers
33k views

What is the most high-performance Linux filesystem for storing a lot of small files (HDD, not SSD)?

I have a directory tree that contains many small files, and a small number of larger files. The average size of a file is about 1 kilobyte. There are 210158 files and directories in the tree (this ...
4
votes
1answer
2k views

Sparse files/file holes and unexpected block size

For my own learning, I've been playing around with creating files with file holes. I created a util that simply reads from stdin and writes to a file, but before writing to the file, it uses lseek to ...
2
votes
2answers
959 views

How to detect and stop user from deleting particular file on Linux?

Is it possible to monitor user actions on the file system and prevent him from performing particular actions? Can inotify only monitor actions on the file system? What about fanotify? There's very ...
14
votes
4answers
3k views

Is there a way to sync only one partition?

Is there a way to sync only one partition instead of all partitions? Something like "sync /dev/sdc1".
2
votes
1answer
2k views

/etc/fstab is mounting rw filesystem as read-only

A partition of my internal hard drive (not the root partition) I want to mount automatically on boot. I've been using /etc/fstab to mount my external backup drive automatically read-only, so this is ...
5
votes
6answers
4k views

How to make a variable symlink ? (or something similar)

How can I make a variable symlink that would point to a different location according to the current user? Is it possible? Should I use something else instead? A mount point? How? Here is the problem ...
3
votes
5answers
7k views

how to mount this disk?

I'm trying to mount a disc created some time ago in Amazon EC2. This is what I see (line breaks added for the sake of readability): $ sudo file -s /dev/xvda4 /dev/xvda4: x86 boot sector; partition 1: ...
5
votes
2answers
1k views

Immutable bit on AIX?

Under Linux I can: chattr +i SOMEFILE so that even root can't modify the SOMEFILE. Are there any similar solutions for AIX?
3
votes
1answer
113 views

Copying a file that is written at the same time

This related question can't solve my exact problem, so I'm writing a similar question. My scenario is the following: a program (run by wine) writes to a file sized about 10-500 KB. About 1 KB ...
0
votes
1answer
791 views

trouble with irssi and cifs

I'm having trouble getting irssi, the irc client, to write to a mounted cifs share. I have the uid, and gid set to my user as well as setting the permissions on the share to being very permissive. ...
0
votes
1answer
192 views

System crashes during boot while mounting /lib/init/rw

After a nasty crash, my system keeps crashing during boot. After a little bit of investigation I have discovered that it crashes executing the following function (in /lib/inin/mount_functions): ...
4
votes
3answers
3k views

ReFS but for Linux

Microsoft is going to bring a "Resilient FileSystem" with Windows 8, but only for servers. I'd like that on a Linux desktop, but my search reveals no contender. There are so many filesystems for ...
16
votes
4answers
12k views

Mount a filesystem read-only, and redirect writes to RAM?

Is it possible to mount a loopback file as read-only, and redirect all writes to RAM?
2
votes
2answers
148 views

What file system is my file on? [duplicate]

How do I figure out which file system a given file/directory is located on? (For example, I would like to know if the file/directory is a temporary file in RAM, or if it's stored on disk. And what ...
14
votes
3answers
2k views

Where do open file handles go when they die?

What happens to the files that are deleted while they have a file handle open to them? I have been wondering this ever since I figured out I could delete a video file while it was playing in MPlayer ...
7
votes
2answers
6k views

How does linux work with symbolic links?

I mean what's going on when some process wants to read a symlink? What's going on when something changes a symlink during a read or even write process? For example: I have 2 huge, similar 100G files ...
4
votes
2answers
1k views

Salvaging a “broken” hard drive

My girlfriend's macbook's hard drive failed, so I gave her a new one and reinstalled OSX on it. Works fine. However, I wanted to see if I could use her old hard drive for backups/fun. I was able to ...
31
votes
5answers
50k views

How can I increase the number of inodes in an ext4 filesystem?

I had a problem (new to me) last week. I have a ext4 (Fedora 15) filesystem. The application that runs on the server suddenly stopped. I couldn't find the problem at first look. df showed 50% ...
8
votes
4answers
4k views

Safely use SD cards when power can go out at any time

We're working on a small embedded Linux system (2.6.35-ish) with a smallish internal NAND device for the OS and applications (250-500Meg) and an SD card with 8Gb SDHC SD cards for data. The unit's ...
17
votes
3answers
7k views

(How) can I create a tmpfs as a regular (non-root) user?

The distribution is an Ubuntu server running the 2.6.35-30 Linux kernel. I would like to have a directory that sits completely in memory. Is this possible without root privileges?
7
votes
2answers
4k views

ISO file readonly?

I have an ISO file and I mount it under /mnt/isofile. Then I copied this file to another folder. But the contents are read-only and belonged to root. I tried to use chmod and chown. But it prompts ...
0
votes
0answers
97 views

At the root level (/) directory, why is that .. refers to itself? [duplicate]

Possible Duplicate: Why does '/' have an '..' entry? I understand that in the filesystem hierarchy starting with / as top-level directory, under which all the other sub ...