A filesystem is a method of storing and organizing computer files and their data.
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4answers
58 views
What does “mounting fs with errors” mean in dmesg and what to do after that?
I run dmesg and this is what I see:
EXT4-fs (sda1): warning: mounting fs with errors, running e2fsck is recommended
EXT4-fs (sda1): mounted filesystem with ordered data mode. Opts:
Here is the ...
4
votes
2answers
74 views
Creating formatted partition from nothing [closed]
I need to create filesystem with just one partition from nothing (/dev/zero).
I tried this sequence of commands:
dd if=/dev/zero of=mountedImage.img bs=512 count=131072
fdisk mountedImage.img
n
...
1
vote
1answer
45 views
ext4 drive takes forever to ls?
I've had an external HDD formatted in ext4 for a while. For some reason, it's started to take forever to list directories. Sometimes just running ls /mount/point/of/drive takes minutes, sometimes that ...
2
votes
1answer
31 views
Compare a filesystem to a dump
Is there a way to compare the current state of the filesystem to that stored in a backup created by dump?
I recently had some major corruption in the filesystem and my most recent backup is from ...
2
votes
3answers
67 views
How does Linux, the kernel, mount filesystems? What actually does this?
My question concerns the Linux source, and if it actually contains the code necessary, natively to mount, parse, and use a filesystem, or if that's added to the source.
If the Linux source contains ...
3
votes
3answers
83 views
How can I change the date modified of a folder to the last changed file inside? [duplicate]
In my media center directory all modified times of my folders are somehow not the desired date.
How can I change all modified times of the main folders to the modified time of the newest media-file ...
1
vote
3answers
50 views
Make system robust against unexpected power loss
Are there any common or standard ways to make a system more robust against unexpected power loss (I.e., without proper shutdown)? I was using a UPS but the battery is dying and I haven't had a chance ...
3
votes
1answer
57 views
file size shown by “du -k” is different in different file systems (PRAMFS and FLASH)
I have a file "xyz.log" which is of size 1.72MB
In FLASH file system : If I run du -k xyz.log output is 1761 xyz.log.
I copied the same file to RAM storage and run the du -k xyz.log output is 221 ...
2
votes
2answers
72 views
Finding sparse files?
Is there a straightforward way to find all the sparse files on my system, or in a particular directory tree?
If it's relevant, I'm using zsh on Ubuntu 12.04, although a more generic Unix-y answer for ...
1
vote
2answers
60 views
Cannot modify files in my home directory
I have a laptop running Ubuntu Server 12.04 and suddenly, yesterday, I don't know what happened, but all the permissions changed of my home directory, so when ever I try to create a file, it says ...
4
votes
0answers
75 views
Reading SIM data via file managers using USB datamodem
How to browse a GSM SIM card's filesystem in Linux / nautilus / pcmanfm filemanager, and read the files with suitable editors ?
There is one related post: Howto read SMS stored on a SIM card? But ...
1
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0answers
21 views
How to blacklist bad blocks from a MD-raid + dm-crypt + ext4?
I have a ext4 partition, on top of a dm-crypt, on top of a MD-RAID 10.
One partition (/dev/sdc1) dropped out of the array with a ton of read errors. I ran the manufacturer provided diagnostic tool ...
5
votes
1answer
69 views
What can go wrong if /var/tmp is on a temporary filesystem?
I have read that I should not mount /var/tmp as a temporary filesystem (e.g., as tmpfs), because files in /var/tmp must not be deleted on reboot. Is that correct?
Suppose I did mount /var/tmp as a ...
2
votes
2answers
49 views
Symbolic link of for my user, doesn't work for root
I am experimenting with the following scheme in order to share common data among different distributions.
In Fedora I have created a symbolic link /home pointing to:
...
0
votes
2answers
51 views
Which filesystem to backup is the best? [closed]
I just bought a disk to backup all my documents and to store it apart and I don't know what is the filesystem under Linux that gave me better reliability. Maybe I'll backup one time each month and it ...
0
votes
1answer
28 views
How to increase the link count for a directory, link count went to 0?
I have made myself land in this situation, it is a chrooted workspace on my system where I virtualize the entire file system ( so its not actual /var/log ) Is there a way that I can either delete this ...
1
vote
2answers
58 views
FS permission scenario
How can I achieve this files & folders permissions scenario:
Consider these folder:
Folder A: 640 root apache /var/www/A/
Folder www: 640 root apache /var/www/
and this linux user:
id user1: ...
0
votes
1answer
38 views
How can I merge root and home in Fedora?
I've installed fedora with default configuration few months back and now I want to arrange the mount points. /etc/fstab look like that:
/dev/mapper/fedora_dhcppc4-root / ext4 ...
0
votes
0answers
52 views
System cannot load Ubuntu based OS's
I built a computer a few months ago, specs listed here. I then installed Linux Mint 13, but then when I wanted to install Ubuntu, the install would start, and I would select "Install". But when it ...
4
votes
2answers
74 views
When I move a file to a different directory on the same partition, does the file's data actually move on disk?
I could see it going both ways. If the filesystem stores it's directory structure and list of files in each directory, and then points to the disk location of each of the files, it shouldn't require ...
14
votes
6answers
516 views
Is it bad to have filesystems nearly full?
Example I have large/small sized filesystems JFS2/EXT3, whatever (and various OS, Linux, AIX), but some of them are on ex.: 90%, 95%, 98% usage.
Questions: Having filesystems nearly full does ...
2
votes
0answers
39 views
aufs with lower writable branch
I'm trying to hide some directories on a mounted file system (it's not about security, just aesthetics). I've mounted the file system regularly on /mnt/data and wanted to use aufs to overlay a ...
3
votes
1answer
51 views
Edge cases in filesystem operations during backup and file copy
I have a question about file access in Linux that I cannot sum it up completely.
Consider that I have a home directory that I backup it using rsync triggered via cron. My home directory is on an EXT4 ...
3
votes
2answers
44 views
How to make directory modication date change when files from that dir change?
For example, if a file has been changed in that directory, then directory modification date should be updated. Basically any changes that happen in that directory should trigger a "touch" on the ...
0
votes
1answer
72 views
Not possible to recover or delete file in a ext4 filesystem
How can I fix a message like this (read after a dmesg command)?
EXT4-fs error (device hdb1): ext4_lookup: deleted inode referenced: 119197
EXT4-fs error (device hdb1): ext4_free_inode: bit already ...
1
vote
0answers
57 views
find ount what [flush-8:0] is writing
Using iotop, I found out that [flush-8:0] is doing a lot of hard disk activity, which explains the annoying slowdowns. However, I can't figure out what's the actual cause behind this flushing. No ...
3
votes
2answers
69 views
Does the order of partitions matter much?
I've just ran a test install of Arch on a separate computer, and now I'm ready to do the real thing on my main one.
However, since the guide didn't explicitly recommend it, I did not install with a ...
3
votes
1answer
67 views
Copying Linux NFS files to a standard consumer external hard drive
I am a graduate student and a relative Linux novice. My institution has an in-house Linux cluster on which I run many scientific simulations. I have a Windows desktop computer from which I access ...
0
votes
0answers
17 views
No output from ldd on Ubuntu armhf root file system
I have taken the hf root file system provided directly by Ubuntu http://cdimage.ubuntu.com/ubuntu-core/releases/12.04/release/ubuntu-core-12.04.2-core-armhf.tar.gz and compiled my own kernel for the ...
2
votes
2answers
75 views
Can I recover from a system disk error on Ubuntu Linux?
I got a strange looking warning message in Windows Vista about a potential hard disk failure. I say strange because I have never in my life seen that type of warning in Windows. It suggested that I ...
2
votes
1answer
70 views
how to find the type of img file and mount it
I have to mount a .img file but I don't know what type of .img it is. How can I figure out what type of .img file it is?
# mount -t auto -o ro,loop gmapsupp.img /mnt/iso/
mount: you must specify the ...
2
votes
2answers
57 views
How to write to ext2 image without having root access
I have been able to mount a ext2 image without having root access by adding an entry to /etc/fstab. However, I am not able to modify this image (copy a new file to it) without having sudo permissions. ...
0
votes
2answers
55 views
What's the difference between Linux and Linux LVM?
If I want to install new hard drive should I make the file system Linux or Linux LVM?
Also after that I've got to format again with mkfs.ext4. Actually what are we doing?
The first one is formatting ...
1
vote
1answer
33 views
not able to add files to HDD
I created a single primary partition to my WD WD800BB-55JHA0 80GB HDD using MBR partitioning scheme. Into this partition I created an ext4 file-system with 200048640 inodes! Then I created loads of ...
0
votes
1answer
19 views
Amazon EC2: Giving Permanent Permission To A Sepecific Directory In Amazon Linux AMI
I have a Symfony2 project that needs full read write permissions to three directories: app/cache, app/logs, and few other directories which are used for uploading. The problem is everytime I push an ...
2
votes
1answer
28 views
How to find the files that are last changed under a directory and its subdirectories?
I would like to know how to find the files that are last changed under a directory and its subdirectories.
ls -lt doesnt work, because if a file is changed and therefore its time is changed to be up ...
2
votes
2answers
62 views
Does named pipe modify the filesystem?
As title. If I create a named pipe and then read/write on it, is the filesystem where the named pipe resides affected? I.e. is the data buffered on the filesystem until read, or does it reside in ...
1
vote
1answer
39 views
Non-persistent differencing file
I have a large file (5-10 GB) and want to access this file in a special file system with the following conditions/features:
There is a single process that reads and write on the file.
When the ...
0
votes
2answers
82 views
cannot create symbolic link on CentOS 5.6 - File exists error
I am trying to setup a symbolic link on my CentOS 5.6 machine to point dev_crmpicco/ to ~/vhosts/dev/dev_crmpicco/web/
I am using the following command:
[crmpicco@devel dev]$ ln -s ...
2
votes
4answers
66 views
Any implementations of unix with “flat”, tag-based file systems?
As I understand, files in Unix are all stored in a "flat" structure in the hard drive -- the file system is merely links from directories to other directories and eventually to leaves/nodes/files. ...
2
votes
1answer
92 views
Dropbox on Debian EAGAIN error on NTFS share
I am experiencing some weird problems, when using dropbox on my Debian install:
I run Debian with testing repositories enabled
I have Dropbox installed from the website
My dropbox-location is on a ...
2
votes
1answer
33 views
Using symbolic link on directory with contents
I'm working on a Debian machine with a bunch of different filesystems and I'm trying to manipulate a large amount of data in MySQL. I've run out of room in my home directory, but there's a ton of ...
28
votes
4answers
741 views
Append huge files to each other without copying them
There are 5 huge files ( file1, file2, .. file5) about 10G each and extremely low free space left on the disk and I need to concatenate all this files into one.
There is no need to keep original ...
2
votes
2answers
54 views
Determining if a file system object is a procfs/sysfs/etc. “virtual file” which doesn't report its length correctly
Some kinds of pseudo-files, like many in the procfs and sysfs virtual file systems, have no file size (stat returns st_size == 0) and do not support SEEK_END in fseek. These file system objects, such ...
2
votes
1answer
119 views
Contiguous copy – How do I copy files contiguously?
I want to copy a number of files onto a flash drive such that each individual file is contiguous. They do not need to be contiguous with each other, and can be in any order. The files will be very ...
5
votes
2answers
112 views
mount options shown in /proc/mounts
IIRC then the mount options shown in /proc/mounts have changed. Some time ago acl and user_xattr were shown, now it seems that only noacl and nouser_xattr are shown if these features are turned off.
...
2
votes
2answers
79 views
How to mount an OpenBSD hard disk image on Linux?
First, I'll start by explaining how I got my problem, this will help me get across what I need.
A few months ago, my laptop hard disk broke. I had no quick replacement, but I needed that laptop the ...
2
votes
1answer
44 views
Creating partition from a start point till the end of the disk using parted
This is my partition table :
Model: ATA Hitachi HTS54757 (scsi)
Disk /dev/sda: 750GB
Sector size (logical/physical): 512B/4096B
Partition Table: gpt
Disk Flags:
Number Start End Size File ...
2
votes
3answers
114 views
When installing linux on USB Drive, which filesystem should I use to format for best performance?
I'm planning on installing Linux on a USB drive, and I was wondering which filesystem I should use to format the drive for best performance (overall responsiveness), and life of the drive?
2
votes
3answers
65 views
determine user-modified files
I plan to reinstall my operating system since I messed up some stuff. Access to files and folders is painfully slow sometimes, even if they contain just a few files.
But of course, I don't want to do ...
