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

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175 views

Filesystem surprisingly large

I'm running a dual booted Windows 7 with Linux Mint right now and I just checked my filesystem size and it jumped from quite small (about 30 GB) to 200 GB recently (no clue what triggered this, I just ...
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1answer
44 views

Copy a file that is in the middle of being written

I have a program that writes to the standard output. It does not write all info at once, it does computation and then writes new bits. The output of the program is being stored in a file. $ ...
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1answer
51 views

Partitionning disk for installation, what size should I give to filesystem? [closed]

I am planning to install debian on dual boot, I have 250GB free for that, but I d prefer answer for any size. I want to separate filesystem on different partition (/, /boot, /root, /home, /var), but ...
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2answers
2k 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 ...
5
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1answer
622 views

Cannot delete broken symbolic link

I have a symbolic link formerly pointing to a Dropbox directory. I don't know what I did wrong, but apparently now it points to itself. hyper@mypi:/home/hyper/test$ ls -l total 1024 lrwxrwxrwx 1 ...
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0answers
74 views

Optimization for an SSD?

I am running Fedora 20 on a Laptop ( Lenovo Ideapad Yoga 2 Pro ) with an SSD. My filesystem is LVM with ext4 as the format option. I am now running Fedora as the only OS on the system with Legacy BIOS ...
0
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1answer
59 views

mke2fs difference between -i and -I options

sudo mke2fs Usage: mke2fs [-c|-l filename] [-b block-size] [-C cluster-size] [-i bytes-per-inode] [-I inode-size] [-J journal-options] [-G flex-group-size] [-N number-of-inodes] [-m ...
2
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1answer
41 views

Ignore file changes

I have a process, which generates a file with configuration data and then calls a subprocess with this data as parameter. I'd like to override the configuration data, which is passed. The problem is, ...
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0answers
86 views

How does fsnotify setting affect system performance?

Occasionally a software package I install complains that the default fsnotify setting is far too low for decent performance. Intellij IDEA or crashplan are two examples. They suggest using fsnotify ...
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1answer
60 views

Find total file size of a disk

I have a corrupted NTFS volume. I ran rsync to copy everything from it, which reported a total # bytes transferred at the end. What's another tool I can use to verify the total # bytes on the disk ...
4
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3answers
183 views

Linux file system that ages off older files when partition is full

I am wondering if there is a file system equivalent to a round-robin database, which for a fixed size, ages off the oldest files. It is pretty easy to implement with a simple cron job, which I have, ...
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0answers
2k views

kernel: “echo 0 > /proc/sys/kernel/hung_task_timeout_secs”

I got this errors in syslog. Any idea what does it mean? The system is running on Ubuntu 12.04, kernel: 3.8.0-35-generic #52~precise1 It looks to me like failure when trying to write to disk... ...
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2answers
90 views

Detect open sockets manually (not using nc or similar)?

I'm trying to debug a network problem on a embedded system which has a very limited set of userspace applications. Meaning I can't use any of the following sudo lsof -i sudo netstat -lptu sudo ...
3
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1answer
133 views

Make Linux forbid colons in file names on NTFS partitions

Does Linux really allow colons in file names, even on NTFS partitions? Why is that? And is there any option to set it straight, and do not allow colons (and other characters restricted by Windows) in ...
3
votes
1answer
41 views

“mke2fs -r fs-revision-level” - how is this used?

mke2fs -r offers Set the filesystem revision for the new filesystem. Note that 1.2 kernels only support revision 0 filesystems. The default is to create revision 1 filesystems. Trying to ...
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1answer
22 views

Space Problems? [closed]

I just got a new SD card for my pi. Trying to install node.js, I ran out of space (I've also recently installed a LAMP server system). But, when I plug it into my main (Windows-Ubuntu dual-boot) ...
1
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2answers
242 views

How to batch clean filenames containing invalid characters

I have a larger directory with files whose filenames contain special characters such as line breaks. The origin of these characters is seemingly that I copied and pasted text from within pdf files ...
6
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1answer
159 views

Does using noatime on modern Linux make sense?

Starting from version 2.6.30 (which was released 5 years ago), Linux has the option relatime enabled by default. It means updates of file access time are very infrequent and prudent. But I still see ...
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2answers
68 views

Something like a symbolically linked file, but with change details attached?

Is there a file type or method for using files in which certain files look and behave like symbolically linked files, but contain extra meta information for changing the data when they are read? ...
4
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8answers
1k views

Which directory MUST exist in / to qualify an OS as Linux

Studying the lpic wikibook for the lpic exam 1, I encountered the following question. Which directory MUST exist in / to qualify this OS as Linux I've searched google and the wikibook but can't ...
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1answer
2k views

Read-only file system error while creating a directory?

I have got one of our production ubuntu machine setup by PRODUCTION Unix team here in our company but somehow when I am doing like this - root@machineA:/test01# ls -lt ls: reading directory .: ...
3
votes
1answer
119 views

How long do dentries stay in the dcache?

On Linux, when I create a new file and open it, an entry about it is created in the dcache's hash table, right? How long does that entry stay there? Does it get removed when nothing is currently using ...
0
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1answer
114 views

How to set automatically permission at automount without mask

I store my data on a NTFS parition to share it with my Windows. I use the dmask,fmask option in my fstab entry to avoid rwx default permissions to everyone, for coherence, security, and also because ...
2
votes
2answers
329 views

Resize vdi size doesn't work as supposed [duplicate]

I just installed the new one Debian xfce via VirtualBox, but decided to increase the vdi size from 8GB to 20GB (because it requires 42% of all disk space at this moment): VBoxManage.exe modifyhd ...
2
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1answer
2k views

Mount exFAT file system as user without hardcoding

I've "solved" the following problem, but not in a desirable way. First, mounting exFAT file systems in Linux was truly as simple as this site says. The catch is, "as long as you are root." A user ...
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4answers
1k views

What is the /dev/disk/by-uuid/ and why does it use all free space on the disk

I have the following Debian that works in Virtual Box: $ uname -a Linux debian 3.2.0-4-amd64 #1 SMP Debian 3.2.51-1 x86_64 GNU/Linux Recently I notice that I don't have any free space: $ df ...
0
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2answers
424 views

Impossible to mount USB hard drive. Filesystem not recognized?

I have been using a raspberry PI since more than one year, with two USB 500GB IDE hard drives as a NAS/torrent box. Yesterday, one of the two hard drives started a repetitive rattling noise, and I ...
3
votes
1answer
62 views

Where are information stored information about hard/soft links

Where does the *nix system store information about number of hard links to a specific inode? I can't find any information about that. Everywhere what a hard link is but rarely a bit more advanced ...
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2answers
434 views

How to create a fixed size Linux ramdisk which does never swap to disk?

I want to create a fixed size Linux ramdisk which never swaps to disk. Note that my question is not "why" I want to do this (let say, for example, that it's for an educative purpose or for research): ...
6
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5answers
923 views

How does one find out how many bits a file has in one command?

I know I can use ls -lat to find out how many bytes has a file and then multiply by 8 to find out how many bits. But is this possible in only one command line?
4
votes
4answers
304 views

Ext4 - How to enable extra sanity, checksums, validations, tests of any kind?

I'm running Ext4 on a harddrive, and to be perfectly honest, I don't really trust the drive because it's old and has a few badblocks. I have nonessential data on the drive, so if it died tomorrow, ...
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1answer
121 views

Monitor file access count by user

I have written a script which is deployed just by putting it in a globally accessible location for all users. I want to log the usage of this script. Is there a way in Linux to find out how many ...
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2answers
1k views

Why is dd using direct slower writing to disk than to a file

I am trying to compare aggregate write rates when writing to a file in a GPFS file system, as compared to writing directly to a disk on a system with Red Hat Enterprise Linux Server release 6.4 ...
2
votes
1answer
112 views

File containing ext filesystem

Let's suppose I create a file, map it to /dev/loop0, and create a LUKS partition inside dd if=/dev/zero of=myfile bs=1M count=1000 losetup /dev/loop0 myfile cryptsetup -c aes-cbc-essiv:sha256 -s 256 ...
2
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1answer
1k views

fstrim trims more than half of partition size even though partition mounted with discard

When I installed my SSD I just mounted with discard and didn't sweat it. However today I was reading about the pros and cons of using fstrim instead and decided to run the program to get an idea of ...
0
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1answer
148 views

Change the root filesystem on an embedded system

I'm using Buildroot to generate an embedded Linux with a kernel v. 2.6.39, which in the end starts busybox. Everything works fine when building with Initramfs as "rootfs". But Initramfs isn't the best ...
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1answer
346 views

Why is my ext4 filesystem recognizable only on the machine it was formatted on?

Xubuntu liveCD 11.04 running on "bad machine" with mdadm RAID1 array with an unrecognizable ext4 filesystem: To rescue some files, I installed a new hard drive and formatted it to ext4. I copied ...
2
votes
1answer
695 views

How to Free Up Space in a Dynamically Growing qcow2 VM image?

This has happened to one of my VM's that's running CentOS under Proxmox. I copied about 40 GB of data into a VM. I then deleted that 40 GB data a day later. Now taking a backup of the same VM takes ...
4
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2answers
10k views

How to repair a corrupted HFS+ partition from a damaged hard-disk?

I have a friend's Mac OS X disk that comes with an HFS+ partition. I am supposed to recover the personal data from this disk, and I'm not yet sure if the filesystem is corrupted or the disk is dying). ...
3
votes
1answer
134 views

Something like VMware “Changed Block Tracking” (CBT) in linux

I'm wondering if is there any possibility to track changed blocks in linux with an ext3/ext4 filesystem (or a specific one supporting it). I mean a feture like the Changed Block Tracking (CBT) ...
2
votes
1answer
114 views

Linux Equivalent of Windows Reparse Points?

I've recently become aware of a neat feature of Windows file systems called a reparse point. My understanding is that they are files whose contents when read are not the contents on the actual disk, ...
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2answers
50 views

Machine keeps backups of files that I have already deleted

I recently found out that my machine keeps backups of files that I have already deleted. For example, a file called a.svg that I have deleted in the past, still exists in the directory it was deleted ...
8
votes
2answers
498 views

Why does the Linux kernel report “out of disk space” when in reality it is out of i-nodes

A friend of mine who likes programming in the Linux environment, but doesn't know much about the administration of Linux recently ran into a problem where his OS (Ubuntu) was reporting "out of disk ...
2
votes
2answers
776 views

How to clean journals in ext3/ext4 filesystem? [closed]

Some preamble: I'm taking bitwise copy of disk devices (via dd command) from twin hosts (i.e. with the same virtualized hardware layout and software packages, but with different history of usage). To ...
3
votes
1answer
451 views

How do I mount a UFS disk in read-write mode?

I have a system drive that has filled up to the last sector, so that it doesn't boot anymore. The file system is UFS (it's an old Freenas 0.7 installation), but since UFS write support doesn't appear ...
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0answers
14 views

Recover deleted Directories in centos [duplicate]

How can we recover deleted directories in CentOS 64 bit. I have tried it with test-disk but unable to update. Can anyone let me know the solution?
0
votes
1answer
91 views

where is the user content on a Mac OS X disk?

I have a friend's Mac OS X disk that comes with an HFS+ partition. I am supposed to recover the personal data from this disk (it's not yet clear if the FS is corrupted or the disk dying), but for the ...
2
votes
1answer
36 views

How to prepare a new MicroSDXC card for use with Android?

After buying a 64 GB MicroSDXC card and plugging it into my Android phone, it wasn't recognized. What do I need to do to use the space on this device? Many articles suggest installing closed source ...
2
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0answers
66 views

How to restrict directory name creation to pattern?

I have FreeNas CIFS share. Mount command result: /dev/ufs/VSPHERE on /mnt/VSPHERE (ufs, NFS exported, local, soft-updates, nfsv4acls) I want to restrict users from creating directories that do not ...
0
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3answers
370 views

How are filesystem snapshots different from simply making a copy of the files?

by doing this, # btrfs subvolume snapshot /mnt/1 /mnt/1/snapshot # tree /mnt/1 /mnt/1 ├── a ├── snapshot │ ├── a │ └── subv └── subv └── b 3 directories, 3 files We can create snapshot ...