A filesystem is a method of storing and organizing computer files and their data.
1
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2answers
74 views
Cannot access any files Manjaro Linux
I cannot open any files on my Manjaro Linux laptop. I really can't remember why it happened but I restarted my computer and now I dont have read/write access to any folder or file even though I've ...
3
votes
1answer
137 views
A clever way to defragment a FAT filesystem?
What is the best way to defragment a FAT filesystem when running Linux/Unix (on usb stick for instance)?
Copy all content elsewhere, format, copy back again?
Use FreeDOS defrag utility, in a KVM ...
2
votes
0answers
17 views
Redis-like temporary filesystem
Is there temporary file system (or ramdisk) that behaves like redis/memcache?
so if there is not enough memory, i will dump to disk, when the computer restarted, it could read back from disk
1
vote
0answers
57 views
/dev/shm/ecryptfs-$USER-Private keeps climbing in Kubuntu 12.10 Install
I'm having a problem with an installation of Kubuntu 12.10 with an encrypted home directory. I've been trying to figure it out for several weeks. For transparency, I'll note here that I posted this ...
2
votes
1answer
62 views
How to place big file on two disks without splitting?
I have a file 100gb in size and a server with two 72gb disk's.
The server runs Ubuntu Linux, with ext4 on the disks, and without LVM.
How I can put the 100gb file on the server with 72+72gb disk's?
...
-4
votes
1answer
80 views
File attributes does not exist in Linux? [closed]
There is no equivalent of Window's file attributes for Linux ?
0
votes
1answer
66 views
In Dolphin file manager Fedora 17, what is the shortcut to create folder?
In Dolphin file manager Fedora 17, what is the shortcut to create the new folder.
E.g. Ctrl + Shift + N creates new folder in Windows 7
1
vote
0answers
54 views
How can I delete data from in a hexdump file from one offset to another?
I've created a disk image which was zeroed, formatted to ext4 file system, and then had several various files copied to it.
I'm trying to extract these files using a combination of xxd and dd, but ...
3
votes
2answers
157 views
Mount HTTP Server As File System
I have a machine on which I wish to mount multiple remote servers to access them all centrally. For remote Linux based systems I am using SSHFS which works fine. But for Windows systems, or systems ...
0
votes
0answers
95 views
Log4j File Location
I have a Webapp running on an Amazon EC2 Linux AMI. I've been trying to configure my Log4J file for logging but haven't been able to figure out where the logs are getting created.
This is my log4j ...
0
votes
2answers
124 views
Writing a Linux file system for NFS
I want to write my own custom file system in Linux. Can I share it over standard NFS without making any changes to the local NFS server? If so what VFS APIs are required to be implemented by my file ...
0
votes
0answers
34 views
Guake : Opening a new guake tab in current directory
I am using Linux Mint Maya with Mate desktop environment and ubuntu 12.04 backend .
I was trying to open a new tab at the current directory using guake.
Though this option is in the preference but ...
1
vote
2answers
92 views
How to make a path world-readable?
To make some item X world-readable, it is not enough for it to have the right permissions: each component of the absolute path leading to it must also have the right permissions. (My understanding, ...
4
votes
1answer
139 views
Is it possible to disable file permissions on a ext3 or ext4 file-system?
Is it possible to disable file permissions on an ext3/4 file-system?
Just wondering if it's possible to completely disable or ignore file permissions on a ext3 or ext4 file system. Perhaps a mounting ...
1
vote
2answers
153 views
How can I expand ext4 partition size on debian
I have a drive with this configuration:
fdisk -l
Disk /dev/sda: 500.1 GB, 500107862016 bytes
255 heads, 63 sectors/track, 60801 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size ...
0
votes
2answers
786 views
Should a laptop user switch from ext4 to btrfs?
Related to this.
I'd like to take advantage of an OS switch to upgrade to BTRFS.
BTRFS claims to offer a lot (data-loss resiliency, self-healing if RAID, checksumming of metadata and data, ...
13
votes
3answers
261 views
Horrible situation - file systems mounted simultaneously by multiple independent OS instances
How do I get out of this situation safely?
Details are as follow:
A xen server has got block devices allocated to VMs. But these devices have also been mounted inside Xen.
In fact 44 of these ...
0
votes
1answer
73 views
Debian VirtualBox Guest - Common Files to Remove for Space Saving?
I have created a VirtualBox guest using debian-6.0.7-amd64. I am using it as a clone template to create Java work nodes, so my needs are pretty much limited to the JVM, networking, SSH and the basics ...
2
votes
2answers
67 views
how can “several file nodes” be associated with a single inode?
I am trying to learn about iNodes and file permissions. I thought that there is one inode that holds the permissions for a single file. The OS pulls a single inode into memory to check permissions for ...
0
votes
0answers
137 views
grub-install from the grub2 shell
I am trying to follow this answer but keep getting stuck with the following errors:
me@greenlane:~$ sudo grub-install --boot-directory=/boot /dev/sdc
/usr/sbin/grub-bios-setup: warning: File system ...
4
votes
0answers
204 views
Preventing access blocking while external HDD spins up?
I have an old laptop where I installed Debian along with a samba server which I am using to share read-write access to 4 external hard drives, which I use to stream my media from.
All works fine, ...
1
vote
0answers
32 views
Reasons for choosing primary over logical partitions [duplicate]
I guess anyone knows the benefits of logical volumes. But are there any reasons why I should choose primary partitions if I can?
3
votes
1answer
79 views
reasons for a dd image of an almost-empty drive not be small after gzip
i just cleaned a 50GB partition with dd if=/dev/zero of=/dev/sda1
then added some data to it (actually installed a linux distro) some 3Gb on ext4.
and decided to make a image.
dd if=/dev/sda1 | ...
0
votes
2answers
41 views
Changes to files don't show up until the partition is unmounted
I have a FAT32 filesystem mounted. After changing a file on it, I can read the file back and still see the old version. My changes don't actually persist until I unmount and remount the partition. Is ...
2
votes
0answers
78 views
Why does my Pandaboard boot partition need to be vfat, and the rootfs need to be ext3 or ext4?
While booting Android on a Pandaboard, I am partitioning the SD card into two partitions, boot and root. They contain different filesystems. Why does the boot partition need to be vfat, while the ...
3
votes
1answer
62 views
md5sum change after mount?
I have a ext3 filesystem on a .img file. After mounting and unmounting it, I noticed that the md5sum is changed, even if no file inside was changed!
md5sum myfilesystem.img
XXXX myfilesystem.img
...
2
votes
2answers
110 views
cannot touch -m a writable file
Can someone explain why I get permission denied when running touch -m on this file even though it is group writable and I can write to the file fine.
~/test1-> id
uid=1000(plyons) gid=1000(plyons) ...
1
vote
2answers
2k views
How to extract boot.img?
I am trying to see the content in a boot.img file from an Android image.
I googled and got http://javigon.com/category/development-tools/ to extract system.img. But it doesn't work for boot.img. When ...
2
votes
1answer
146 views
Why do inode-based file systems NOT need reboot after updating library versions? [duplicate]
I am trying to understand what an inode is. However, this passage from Wikipedia puzzles me:
Installation of new libraries is simple with inode filesystems. A running process can access a library ...
2
votes
3answers
67 views
How to prohibit from changing an owner of modifiable files?
I sometimes need to run a Qt Creator from root. After that, some config files of Qt Creator suddenly have a root as an owner. Therefore when running Qt Creator as user, I am getting nag warnings about ...
2
votes
2answers
140 views
dynamic file system with hooks
Is there anyway in linux (I don't care which distribution or flavor) to have a dynamic file system with read/write hooks? For example I would like to mount a dynamic file system at /dynamic and ...
1
vote
1answer
77 views
Can a overlay/union file system be used as makeshift deduplication?
Given a union file system (mhddfs, unionfs, aufs) would it save me anything if I overlaid a writable file system over one with a bunch of ISO files, say Ubuntu 10.04, and then use zsync to update the ...
3
votes
2answers
134 views
Is there any performance penalty to having multiple segments for one volume in LVM?
We have a big drive that we've split up using LVM. We allocated one segment to the root filesystem and several other segments to other filesystems. Then we wanted to add more space to the root ...
2
votes
3answers
79 views
Circumvent permissions of filesystem on an external drive
Suppose that I have only non-root access on a desktop Linux machine.
I want to work with an external, pluggable storage device (hdd, flash drive or memory card) with an ext{2,3,4} file system.
Since ...
0
votes
1answer
49 views
see actual partitions usage
I have recently learned that ext3 (or some other filesystems) reserve some space of a drive by default for previliged processes. One can change this by doing the following:
# tune2fs -m 4 /dev/sdXY
...
1
vote
3answers
131 views
Can a mounted encrypted filesystem be safe from root?
I have access to a shared remote computer from which I would like to run some code I have written which uses an interpreter (not a compiled code). I would like to protect this source code from other ...
0
votes
1answer
83 views
What is Linux for OpenVMS DIRECTORY/NOHEADING/NOTRAILING?
OpenVMS DCL command DIRECTORY/NOHEADING displays just the full file name including path info in a single-column format without any of the normal headings for a directory listing. The /NOTRAILING ...
1
vote
0answers
669 views
How to set up ZFS with ZIL and L2ARC SSD?
I have been considering bcache and flashcache.
However my friend suggested me something called ZFS. In fact it says that formating disk with ZFS can actually do the exact same thing without kernel ...
3
votes
2answers
154 views
Storing thousands of files in one directory
I have a web-site that I'm checking for performance issues and bugs, and i came across a caching code that caches thousands of files into one single directory.
I understand that this is not good and ...
19
votes
1answer
780 views
Purpose of /dev/zero?
I tried to cat /dev/zero, and it didn't seem to do anything. I googled /dev/zero, and it says it's basically a blank file with infinite size. Is cat printing an infinite number of non-existent ...
2
votes
1answer
418 views
Resize ext4 partition to create more inodes? [duplicate]
Possible Duplicate:
How can I increase the number of inodes in an ext4 filesystem?
An old headless no-X backup server I use has a small hard drive with three primary ext4 partitions: /, ...
4
votes
1answer
226 views
updating `/etc/resolv.conf` on a read only filesystem
I currently have a busybox based embedded linux system. The filesystem is a readonly mounted jffs2 filesystem. One problem I've run into is that /etc/resolv.conf can't be updated by DHCP.
Is it ...
3
votes
1answer
44 views
Emulating a file
I have certain application that opens a file with given path (presumably with fopen or derivative), reads the file, possibly writes to it and closes it. I have no control over this application other ...
2
votes
3answers
719 views
Best way to mount remote folder
I have two RasberryPi running debian wheezy and I would like to mount a folder from computer A on computer B.
What is the best (as in most efficient) way to do this?
I can do it via SMB, but that is ...
4
votes
4answers
73 views
Tool to compare files on one disk with registry information on another?
Been a long time since I got very far under the hood in Unix so I'm probably not even using proper terminology when I say 'registry,' but here's the situation.
I have a disk thats dying. Lots of i/o ...
13
votes
3answers
263 views
Securely delete files on btrfs filesystem
Sometimes, there's the need to delete a file in a filesystem, and make sure that the file is truly gone. A file that contains sensitive passwords, for example, should be throughly wiped from the disk.
...
4
votes
2answers
147 views
FHS differences between OS X, Linux and FreeBSD
I've read that there is a different behavior between FreeBSD and Linux with the /usr/local, in FBSD ports are installed there, in Linux not, can someone explain more on this?
I'd like to know where ...
0
votes
2answers
134 views
Problem mounting my iRiver story HD on Ubuntu
I would like to connect my iRiver Story HD to my ubuntu 12.04 machine but as I connect it I get this error:
Unable to mount Story HD
Error mounting: mount: wrong fs type, bad option, bad ...
23
votes
3answers
1k views
Why are text files 4kB?
For some reason, when I make a text file on OS X, it's always at least 4kB, unless it's blank. Why is this? Could there be 4,000 bytes of metadata about 1 byte of plain text?
1
vote
1answer
117 views
What parts of the filesystem to tmpfs/squashfs/sparseimage for USB live system
I want to create a live system on a USB key / SDCard with Linux Mint 14 (KDE or Debian Edition) that stores data persistently. The USB key needs to have at least one fat32 partition. As storage for ...
