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

learn more… | top users | synonyms (2)

1
vote
2answers
890 views

File system CRC check

I know that before running the kernel, u-boot (the boot loader) will check the kernel image CRC. Only if it is correct it will go further, else it will give a "Bad CRC" error. I want to do same thing ...
11
votes
3answers
2k views

What file systems on Linux store the creation time?

Are there any (good known, reliable) file systems on Linux that store the creation time of files and directories in the i-node table? If there are, is the "changed" time replaced by the creation ...
2
votes
1answer
457 views

How can I get write access to my usb drives?

I have trouble writing to external drives. They are monuted automatically in Nautilus, but I can not copy anything there ('Paste' and 'create Folder' are just greyed out). Does Anyone have ideas what ...
20
votes
3answers
7k views

Birth is empty on ext4

I was just reading up on the Birth section of stat and it appears ext4 should support it, but even a file I just created leaves it empty. ~ % touch test ...
2
votes
4answers
44 views

Does the inode change when renaming or moving a file?

in PHP the fileinode() functions returns the inode of a file. I was wondering if I can use it to determine if a file was renamed, moved or modified. I did some tests and it seems the inode stays the ...
2
votes
2answers
31 views

Several hard-links with different metadata in Linux using Ext4

Is it possible for Ext4 file systems (or maybe another one understood by Linux) to assign different metadata (like modification time, owner, access rights) to several hard-links that refer to the same ...
0
votes
1answer
26 views

Program to decrypt file for only one process

I looking for a program to encrypt and decrypt files (better if directory) on fly and for only one process via cli. In my mind it must work like sudo: If you run cat $crypted_file (also in superuser ...
5
votes
4answers
5k views

Mounting multiple devices at a single mount point on Linux

Is there a way to mount multiple hard drives to a single mount point? Let's say I run out of space on /home and decide to add an extra hard drive to the computer. How do I scale the space on a mount ...
0
votes
2answers
48 views

Ubuntu broken after power failure. How to fix?

I have Ubuntu 11.10. server which suffered from power failure today. Ever since the power went back on the unit works only partially. Some services work OK, some does not start, e.g. apache2ctl ...
14
votes
6answers
563 views

Showing only “interesting” mount points / filtering non interesting types

I used mount to show mounted drives, I don't want to see the not so interesting ones (i.e. non-physical). So I used to have a script mnt that did: mount | grep -Ev 'type (proc|sysfs|tmpfs|devpts) ' ...
0
votes
1answer
45 views

du and ls commands reporting wrong directory size

I'm used to the du command. I often use it with -h option. I report the result in a text file which I use to track space consumers. But I was wondered today to see a directory being reported as using ...
4
votes
6answers
312 views

Which partition is mounted to where? [duplicate]

How can we check the mount points for partitions listed in /dev/sd*? For example, I would like know if the partition for my home is /dev/sda4.
5
votes
2answers
1k views

Querying an overlayfs

I'm looking for a way to query a mounted overlay filesystem (overlayfs) in order to check it's upper and lower directory, but until now I haven't found any suitable command for that. Is there is a way ...
0
votes
2answers
6k views

How to force drop all partitions and erase disk from terminal?

My question is in fact related to OS X, however I'm using Linux tools to resolve my problem. I'm trying to delete all the partitions on my SSD drive and create new GUID (HFS+) partition table. Native ...
5
votes
2answers
8k views

Format external hard drive to linux compatible file system

How do I format my external hard drive to a very Linux compatible file system?
0
votes
0answers
10 views

Possible to detect and alert when SMB writes cryptolocker to a share?

I need to make an alert,task, or action when cryptolocker uploads a specific app into the OS How can I hook into the filesystem in such a way so that I can detect this? For reference, I'm using ...
3
votes
3answers
552 views

How to know if /dev/hda2 is Primary partition or Extended partition

If all four primary partitions exist on an IDE drive, they are numbered as follows: /dev/hda1 /dev/hda2 /dev/hda3 /dev/hda4 We have also the partitions on a disk with one primary partition and ...
1
vote
0answers
10 views

shared filesystem with offline access

I would like a shared filesystem with offline access. I have two machines. One is a light laptop with a small amount of SSD storage that I carry with me. The other is a stay-at-home computer with much ...
2
votes
4answers
1k views

Why is writing SLOW on raw device, and FAST on filesystem (USB key)?

I have a USB key (PQI U822V-Speedy 32G) that I am trying to benchmark quick'n'dirty on Linux. I'm testing write bandwith. dd on raw partition I created a partition starting at sector 2048, then did ...
0
votes
1answer
18 views

Smallest file block size (ext 3, 4)

I'm curious, what is the smallest size a file can really be on Linux? (Assuming Ext3 fs, so why not ext4 fs as well). Sure you can write a file that only contains one byte, or maybe even less; but ...
3
votes
0answers
195 views

Is btrfs suitable as backup filesystem?

Right now I have a pretty traditional backup filesystem structure on top of ext4. Every time a backup is made, a new folder backup-DATE is created to which files are rsync'ed (with hardlinks made ...
0
votes
1answer
44 views

how to read and write to a filesystem in linux?

I have a hard disk and partitioned it into several partitions. How can i read and write into the filesystem. What is the use of mountpoint? If a process has to write or read something from that ...
0
votes
0answers
25 views

want to execute a script which is in other filesystem [closed]

I want to execute a script which is in other filesystem. The other filesystem is also in the same server. e.g I am in A filesystem. I want to execute a script of B filesystem. Both A & B are in ...
18
votes
7answers
8k 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 ...
0
votes
1answer
32 views

Overhead when relocating a directory to a different file system using a symbolic link

I need to relocate some frequently accessed files to a different file system. The simplest way of doing this is to move the directory containing the files to the new file system and creating a ...
0
votes
0answers
20 views

Detecting filesystem changes without direct fs-support

How do I detect changes (additions, deletions, modifications) to a directory tree without filesystem support (like btrfs snapshots)? I want to list all changes to a specific directory tree on an ext2 ...
2
votes
2answers
958 views

Debian won't boot: udevd fails to load device sda and sdb

I can't boot my Debian system, I got this error during boot up: Driver 'pcspkr' is already registered, aborting. I have solved this by adding blacklist snd-pscp to /etc/modprobe.d/blacklist.conf ...
9
votes
2answers
11k views

how can I recursively delete empty directories in my home directory? [duplicate]

Possible Duplicate: How to remove all empty directories in a subtree? I create directories very often, scattered over my home directory, and I find it very hard to locate and delete them. ...
11
votes
3answers
3k views

EXT3: If block size is 4K, why does ls -l show file sizes below that?

If you run ls -l on a file that contains one letter, it will list as 2B in size. If your file system is in 4k blocks, I thought it rounded files up to the block size? Is it because ls -l actually ...
1
vote
1answer
25 views

Storing documents and backups on several different drives

Currently I have Ubuntu installed on a 120GB SSD. However I also have 3 more hard drives installed on the computer, 2 x 640GB in aRAID array and a 60GB SSD. What I am trying to achieve is to use the ...
0
votes
2answers
17 views

file creation and acces monitoring app [duplicate]

I remember long time ago I had some antivirus on windows which had wile accesses monitor, and could tell you if any process accesses a file.I need to monitor every file in my home folder(or any other) ...
2
votes
2answers
44 views

Concatenate two files to loop-mount the filesystem inside them

I have two files diskimage.part1 and diskimage.part2 on an external slow (USB 2) hard drive and I need to do the equivalent of cat diskimage.part{1,2} > diskimage mount -o ro,loop diskimage ...
1
vote
0answers
69 views

No space left on device, with 320 GB free

I'm a bit lost. I have a 500 GB external hard drive with its original filesystem still in place. The last command (dd writing to a file within this filesystem) failed with "no space left on device". ...
3
votes
0answers
27 views

ack.pl tool and ack.pl flags

I am using the ack.pl tool in order to search string or IP’s in files The official site of ack.pl is - http://beyondgrep.com/documentation/ Example of ack.pl CLI ( want to find the string ...
0
votes
2answers
68 views

Which file system is better for Ceph?

I've read the Ceph OS recommendations document, but still I have a question. Which file system is better for Ceph? XFS, ext4, or something else?
0
votes
0answers
29 views

How can I recovery data? Or how can I fix file system without deleting of data?

I have done fsck.ext4 -f /dev/sda5 but questions were too much and I close one several times. After that I used several times e2fsck. But it was very slowly and I stopped one several times too. ...
53
votes
1answer
2k views

Why are there so many different ways to measure disk usage?

When I sum up the sizes of my files, I get one figure. If I run du, I get another figure. If I run du on all the files on my partition, it doesn't match what df claims is used. Why are there so many ...
1
vote
0answers
19 views

Is there a way to backup and restore ACL file and folder permissions on linux the way that there is using icacls in Windows? [duplicate]

In Windows you can do this (backup and restore ACL permissions) can you do this in Linux? And to clarify, I mean ACLs in Linux, I do not mean the default permissions modified with chmod / chown.
2
votes
0answers
25 views

How to check if GRUB is password protected or not?

Is there any command to check whether GRUB boot loader is password protected or not? What is the file path? where it stores this information specially on Debian OS.
2
votes
1answer
39 views

What is in /dev /proc and /sys

After mount there are listed some filesystems. I need to know what's in the /dev, /proc and /sys. Some examples would be great!
-1
votes
0answers
29 views

get all files and folders from image file [migrated]

C program that reads a disk image specified as a command line argument and prints the paths for all files and directories in the image.If the entry is a directory, print a forward slash at the end of ...
3
votes
1answer
966 views

Can virtfs/9p be used as root file system?

Is it possible to use a folder shared from the host to the guest via virtfs/9p as the root file system inside the guest? Loosely related to my previous question: Can virtfs/9p be used to share the ...
3
votes
2answers
76 views

How can I test if my /tmp “works”?

I had to delete some files and whatever, long story, I ran sudo rm -rf /tmp/. Now, on mac (might be universal, I'm not sure) it is a symlink to /private/tmp/. But my /tmp/ folder has a thumbnail ...
1
vote
3answers
26 views

Should I put old projects in tarballs

I never really used tarballs/archived much, except for uploads (with compression). Now I've accumulated a huge list of software projects coding experiments -- basically directories with lots and lots ...
3
votes
1answer
4k views

Mounting a multi-partition (GPT/HFS+) USB 2.0 harddrive on Debian

I have a 3TB USB 2.0 hard-drive which has two HFS+ (Mac) partitions using GUID partition table for the partition records. It was partitioned with Mac OS Disk Utility. How can I mount these partitions ...
8
votes
1answer
358 views

mkdir: cannot create directory: Function not implemented

I am in college and have to submit my cs homework from a school Linux machine, but I like doing the homework on my laptop (Mac). So instead of copying my files over every time, then submitting them, I ...
1
vote
1answer
588 views

Why isn't sda1 showing up in dev and how can I fix that?

I have an embedded Linux device and I was trying to copy some files to it. I plugged in a USB stick, the dmesg shows that it was recognized, but for some reason /dev/sda1 never showed up. I'm trying ...
3
votes
1answer
20k views

read only root filesystem

Somehow my Debian went to read only in root file system. I have no idea how this could have happened. For example when I am in /root folder and type command nano and after that press Tab to list ...
4
votes
3answers
5k views

Fix EXT4-fs bad geometry (block count exceeds size of device)

I have a micro SD card which has a FAT32 partition and an EXT4 partition. The EXT4 partition will no longer mount. dmesg shows the following error: EXT4-fs (sdb2): bad geometry: block count ...
1
vote
0answers
17 views

How to diagnose potential JFFS2 flash problems?

I have a large fleet of embedded ARM systems using the JFFS2 filesystem. Are there any particular commands or log file entries I can query to gauge whether they are having any corruption or other ...