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

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What is the “-rescue” function of Clonezilla and when should I use it?

When running Clonezilla on a NTFS-drive with bad sectors the cloning is interrupted and I get a suggestion from Clonezilla to use the -rescue option to save as much as possible from the damaged drive. ...
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1answer
79 views

How can I zero the unused blocks on my filesystem in order to minimize the compressed disk image size? [duplicate]

If I dd my disk and compress the image with lzma or lzo the image is still big. The partition is 10GB used, 90GB available. But the image still around 20GB. I believe that is because I have copied ...
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60 views

How to check UBIFS for errors?

My ARM system uses NANDFlash and UBIFS. IS there a command that will let me check the filesystem, report any errors or warnings, and also report the current compression level?
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2answers
211 views

Strange mount entries, procfs on net:

On a device I get among others the following strange entries for mount: none on net:[4026532603] type proc (rw,relatime) none on net:[4026532424] type proc (rw,relatime) Any idea what or for what ...
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2answers
25 views

Where is the information about the file system format stored in External Hard Disks

I was reading about mounting in Operating Systems and have the following question related to it: When we plug an external hard disk it gets automatically mounted in our file system, the one our ...
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32 views

Is there a program like searchmonkey/Everything that previews images or webms?

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 ...
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36 views

Ubuntu file system corruption error won't boot

my digital ocean droplet is going through some tough errors and I can't find any help. Perhaps someone here could point me the way. I was using the droplet normally, after running a failed DeployBot ...
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1answer
21 views

Are there any type of representation on filesystem for network ports?

Say I wish to feed some data into a certain network port created on my system and do that manually. Is there any interface for it on filesystem? Maybe a special type of file that I could write into? ...
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27 views

Will linux terminal understand this path structure

I am trying to create a script that will run on Linux. This script is supposed to query a database on another machine and the query returns paths formatted in windows. However if I make the script and ...
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1answer
69 views

Write data/bytes in a file, out of content and metadata?

Using Unix & Linux FS, I aim to write data like: 10011010 11101001 01011011 10110110 01100011 01111110 00010001 11100101 10011101 01110000 11111110 11111111 10000001 10011100 11011100 10011111 ...
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1answer
249 views

Recovering from a chown -R / [duplicate]

I've made today the greatest error on my server using root user: chown -R 33:33 / instead of chown -R 33:33 . within some webroot folder. Well, this brought ssh down. I made it this far to get it ...
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1answer
67 views

If my program detects that a power loss will occur in a few seconds, what can it do to avoid data corruption?

A program (which needs to read and write from and to the filesystem), has the extra feature of being able to communicate with an external sensor. Therefore it has the unique ability to know if a power ...
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39 views

Make ubi filesystem image from directories

I have a rootfs directory which contains all the directory structure (bin boot dev etc home ... var) to be installed on an embedded board . What I would like to accomplish, is to make a ubi image ...
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1answer
170 views

A Start Job is running for dev-md1.device

Hello everyone I'm with the following error on my CentOS 7 I restarted the server is now the boot time is with this message is already so minimum 40 minutes, what should I do? Please Help-me?
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1answer
55 views

Compare size of file system

How to compare size of file system on 2 different servers Eg: Server1 Filesystem GB blocks Free %Used Iused %Iused Mounted on /dev/prddatalv 40.00 18.32 55% 65 1% ...
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1answer
32 views

Is it possible to mount a partition only for some users?

This thread comes from here. Even when it is an Android question, I think the theoretical command line part should better be asked here. In short: I have achieved to mount a Ext4 file system, but ...
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2answers
324 views

How can I know if my kernel has ExFAT support?

I would like to know if some ExFAT formatted SD card (or pendrive, USB hard disk... etc) will be read by the kernel of my installed Linux distro. I know that, since about 2013, most kernels include ...
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1answer
27 views

Relationship and distinction between VFS and FHS

It is clear that VFS provides programs to access different file systems with same interfaces. Meanwhile, FHS is standard for directory structure. I would like to have some inputs regarding them ...
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2answers
66 views

Lock a user with his home folder

Is there any way of making a user only able to see and modificate his home folder? I am currently on arch linux. Just explaining a little better, the user would not be able to see /etc or any other ...
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80 views

How to move space from 1 file system to another?

I am currently using Virtualbox to run this server where my current disk space is: $ df -h Filesystem Size Used Avail Use% Mounted on /dev/mapper/ol-root 50G 44G ...
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1answer
55 views

How to copy files that are very large

I would like to copy files which are nearly 50GB and 75GB of each to external drive. Please suggest best and fastest way to do that.
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1answer
54 views

The file system type of my home partition is 'swsuspend'. Is this recoverable?

Here's how this happened: I've got separate root, home, boot and swap partitions for my Arch Linux installation. Today I booted from a USB stick and mounted my root, boot and home partitions to ...
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1answer
106 views

What characters are valid to use in filenames? [duplicate]

I seems like it is possible to create filenames in unix with just about any valid character. touch \; && touch \\ && touch \" && touch $'\n' && touch $'\t' && ...
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25 views

What's the advantage of locale archives over locale files spread out in directories?

I am quite curious about why locale-archive files are preferred in many Linux distros and what and to which extent its advantage over compiled files for each locale would be.
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44 views

sysv and unknown partition table?

We have disk about 1985, It has a Unix.But we didn't know type of Unix.I did the following step : dd if=/dev/sdc of./all_of_disk.iso #sdc is the given disk Then : hexdump -C all_of_disk.iso > ...
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1answer
56 views

Add data in a file, but not out of content? (steganography)

I aim to hide data into .txt and .xml files, from Linux OS, aand keep it readable on any OS. With Apple OS (OS X), I used to write 'secrete' data into files (actually in the Resource Fork of the ...
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612 views

how to check the format of a filesystem

I would like to check, in a bash script, on what filesystem type a directory is. The idea is something like if [path] is on a [filesystem] filesystem then filesystem specific command end if
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76 views

Does converting raw dd-image to VDI touch the filesystem?

I have a raw dd-image of a harddrive from a Mac, and I need to extract the files from it. The problem is that the filesystem (HFS+) is corrupt, and from what I've been able to google is that it's ...
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1answer
92 views

Root file system vs partition's file system

Based on the first paragraph from linfo as quoted below, one can conclude that root file system is actually the partition's file system where Linux is installed. The root filesystem is the ...
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1answer
42 views

Is it safe to move partitions like that?

I have SSD with installed both Windows 8.1 and Ubuntu 14.04. Windows has it's own UEFI starting partition and Linux has Legacy BIOS one. I would like to completely scratch Windows installation from ...
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1answer
37 views

What does [0x200000401:0x4:0x0] for a file ID signify

I tried to get the id(descriptor) of the file using the DFID which is defined as #define DFID "["DFID_NOBRACE"]" in lustre and got the output as [0x200000401:0x4:0x0]. So what does the fields ...
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1answer
53 views

xenix (sysv) file system doesn't support since kernel 2.1.21

xenix filesystem equvalent sysv filesystem, man mount says: Note that,cohorent, sysv and xenix are equvalent and that xenix amd cohorent will be removed at some point in future use sysv instead. ...
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51 views

What software is responsible to check permission of files to give access or not to users?

I want to verify that is it the responsibility of file system?
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155 views

How can I convert a disk from ext4 to ext2?

I have Ubuntu with a root volume using ext4. I need to downgrade it so that it is using ext2. Is there a way to do that?
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Partition's file system, VFS and root file system

It's clear to me regarding the partition's file system and VFS but not for the root file system. Let's say I have a disk with 3 partitions which are swap, installation and home. Each partition ...
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2answers
37 views

wicd does not work on read-only file system

My root filesystem is mounted read-only. I have installed wicd, but it fails to work with following error: IOError: [Errno 30] Read-only file system: '/etc/wicd/manager-settings.conf' It seems, ...
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0answers
36 views

What happens to directory entry when a file is renamed

What exactly happens to the directory entry when a file is renamed? Is it that the entry of the oldfile is flushed and the newfile is replaced at it's place or a completely new entry is made at the ...
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1answer
43 views

Striping a directory in lustre

What exactly happens when a directory is stripped in lustre? As far as I know if a directory is striped then whatever are the striping parameters set for the directory same are applied to the files ...
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3answers
82 views

What is the reasoning/design choice behind the unix/linux file system structure?

I've recently switched from using windows and I'll now be running linux on my computer. In windows there's the program files folder. Most of a programs files go into its own folder there which to me ...
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812 views

What are the alternatives to the FHS?

Please don't crucify me for asking this question. :) I'm a long time Linux user for over 15 years but one thing I hate with a passion is the mandated directory structure. I don't like that /usr/bin ...
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fs_usage: a part of stdout is missing.. Where did it go?

I'm using $ fs_usage -f diskio to spy on processus when I hear my hard drive spinning for no reason, so that I know who is working so hard.. Here is one sample line: 16:14:13.785568 ...
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52 views

How do I find out hard disk model and serial number in amazon machine?

when check in local machine /proc/scsi/scsi file it contains Attached devices: Host: scsi0 Channel: 00 Id: 00 Lun: 00 Vendor: ATA Model: ST3160215AS Rev: 3.AA Type: Direct-Access ...
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1answer
57 views

How to increase the size of a vfat file system to exactly the size of the containing partition?

This is a further question after this one. I google for it, but most of the search results are about how to grow the partition and the file system at the same time. I think this question is simpler ...
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49 views

File System that is order sensitive [closed]

Is there a file system that is unix compatible that is order sensitive? For example the following 2 directory structures would be different. a b c and a c b
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16 views

Modify /dev/zero Output Minix [duplicate]

I am trying to modify the /dev/zero block file so that it returns a character "Z" for example instead of zero. I tried opening /dev/zero thinking I would be able to see the code and modify it. To my ...
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2answers
40 views

Is there a variant of the “cp -a” command that avoids copying from other filesystems?

Let's say I have a directory /data/something with the following subdirs: /data/something/iowa /data/something/wyoming /data/something/burkinafaso /data/something/slovenia All four subdirs have ...
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240 views

To fix “Read-only File system” issue when SSH access to IP Camera

Currently I have a IP Camera, which allows the SSH access as root user. The build-in Shell is BusyBox 1.19.3 (but guess not relevant to this issue). There are a few directories, such as /bin, /root, ...
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after extension of partition grub says unknown file system

I have a vServer with Debian Wheezy running, yesterday I wanted to extend the partition but after the reboot grub2 says error: unknow filesystem. Entergin rescue mode... grub rescue> Here I am in ...
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1answer
68 views

Why readdir() only reads 32K of directory entries at a time?

readdir() only reads 32K of directory entries at a time. Why does it read only 32K entries? Is it dependent on buffer or any other parameters? Can I change that value so that I can read as many ...
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2answers
30 views

is VFS a module?

While studying VFS, this question popped into my head. Is it okay to think of VFS as a module? The reason why I thought like that is because VFS has the characteristic of simplifying actual file ...