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

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“Clean” Filesystem Hierarchy

The Linux filesystem hierarchy is full of unused folders that only exist for historical reasons. Do any distros install with only the directories that are actually used?
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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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Why do we need to specify partition type in fdisk and later again in mkfs?

I'm a little confused about fdisk and mkfs. So - here is typical USB flash drive partitioning and formatting: umount /dev/sdb fdisk fdisk /dev/sdb Command (m for help): d Selected partition 1 ...
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581 views

Gparted says disk is full but it isn't

I'm on Manjaro and today I woke up to find my computer having problems due to a full disk. I have deleted many things but this did not solve the issue. I have no idea what is happening. Is there a ...
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ext3 Filesystem shows full to most apps, but only 77% full to DF

Var is showing as full to many apps like Nagios, Puppet, and the LVM tools (pvs, vgs, etc) df -h output 6.0G 4.3G 1.4G 77% /var vgs output /var/lock/lvm/V_rootvg:aux: open failed: No space ...
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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 ...
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What causes /dev/disk/by-label to be populated?

I've noticed that Linux distributions typically have a /dev/disk/by-label directory, but this isn't always the case (For example, the CirrOS Linux test image doesn't have one). What's required on a ...
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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 ...
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HDD no longer able to mount after editing /etc/fstab

I have an SSD which holds / and my home directory, but I also have a 1TB HDD with most of my music on. I tried to edit /etc/fstab to automatically mount the HDD to save me time. I am running Kubuntu. ...
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vfat not recognized in debian

I want to mount my usb drive (kindle vfat32). When I do mount -t auto /dev/sdf1 /mnt/usb I get mount: unknown filesystem type 'vfat' I checked if the drive is recognized with sudo fdisk -l and ...
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How to increase the size of rootfs?

So I got this error today and decided to investigate: /etc/init.d/mysql: ERROR: The partition with /var/lib/mysql is too full! ... failed! I'm not sure how... but I've filled up my rootfs ...
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How can I backup a directory to NTFS while preserving Unix file attributes?

I want to make a backup of my home directory to an NTFS partition (an unfortunate limitation). However, when I last tried using just cp, the attributes (owner, etc) went away. How can I make a backup ...
4
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594 views

Virtual file made out of smaller ones (for mac-like sparse bundle solution)

I'd like to recreate a feature of Mac OS X called sparse bundles (disk images made out of smaller files, making them easy to backup after a small change). For that I'm looking for a way to ...
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What happens to partition labels after removing a partition?

What will happen to all the remaining partition labels if I remove a single partition? For example if I have a layout that looks like this: /dev/sda1 /dev/sda2 /dev/sda3 /dev/sda4 /dev/sda5 and if ...
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How to delete, without rm/unlink

Related to another question I asked here [http://unix.stackexchange.com/questions/253932/rename-folder-with-odd-characters] I'm wondering if it's possible to bypass the normal rm/rmdir/unlink ...
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Speed up copying 1000000 small files

I have 1000000 4-20 kb files in a dir. I need to copy that dir. But it seems I have to do a seek for each files so this takes quite a while. Is there a way in which I can speed this up? I am ...
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1answer
958 views

rootfs.jffs2 files system won't fit in mtd3

I have a files system that I am trying to put in flash memory mtd3 partition. I first boot using uboot and then do run sdboot to boot using SD card as shown below: U-Boot-PetaLinux> ...
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4answers
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Bash script to output path to USB flash memory stick

How would I return (output) the path to any USB flash memory stick(s) connected to the local computer using bash (Ubuntu and Linux Mint)? Background: I'm providing users with an automated backup ...
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Is it mandatory to have a file system and MMU in Linux? [closed]

Suppose I do not need a filesystem and I have only applications where data reloading may not be required - so MMU may be redundant. Can I remove these two items from Linux, and boot the OS ...
3
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1answer
549 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 ...
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Mount exFAT file system as user without specifying /dev/sdX1 in /etc/fstab

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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1answer
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A process, run as root, when performing mount, is mounting for `self`, how to make the mount global?

I'm mounting a share from within process'es context. That, ultimately, mounts the object on a per-process namespace basis, rendering it invisible for the rest of the system. The problem is partially ...
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1answer
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sshfs - can't unmount the point

I mounted a folder on a remote machine using sshfs, but didn't specify -o allow_other flag thus can't access the mounted directory. When I try to mount over with -o allow_other option sshfs gives me ...
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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 ...
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Taking file ownership when file and directory is readable/writable

I got some files in directory: drwxrws-wt 2 me mygroup 4,0K 10.1. 12:34 . -rw-r----- 1 someone mygroup 10G 10.1. 11:22 someonesfile me and someone are regular users without supplementary ...
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983 views

Disk size management

I am using Fedora 16. My /dev/sda2, mounted on / (root) with something like 50G got filled 100%: [foampile@~ 13:13:39]> df Filesystem 1K-blocks Used Available Use% Mounted on rootfs ...
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1answer
983 views

How race conditions affect reads and writes (that happen at the same time)

Let's say I open a file a for reading. What if an application, let's call it aWriter writes to this file in random intervals. Are there any possibilities of me receiving improper file contents if I ...
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1answer
472 views

Are there any differences between mounting a /proc filesystem inside a chroot compared to mounting it from the outside?

Compare the following: mount -t proc none ./my_chroot/proc and: chroot ./mychroot mount -t proc none /proc
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1answer
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What happened to /proc/sys/fs/relatime_interval?

According to one answer relatime interval can be changed by echo 60 > /proc/sys/fs/relatime_interval but I do not have such a file? Where did it go? $ ls /proc/sys/fs aio-max-nr ...
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warning: Filesystem seems to be mounted read-only

I have an old SGI indigo with an EFS file system (Extent File System ), and the password needs to be reset. I can mount the hard drive, but read-only. I need write permissions. # mount --rw -t efs ...
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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 ...
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ext4 corruption found in superblock, but filesystem can be mounted

After a crash, I've got an Ext4 filesystem (on an LVM LV) that gives the following error when running fsck.ext4 -nf: e2fsck 1.42.12 (29-Aug-2014) Corruption found in superblock. (blocks_count = 0). ...
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2answers
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Is reading a file on UNIX faster than writing a file?

Sorry for the sheer simplicity of this question. A rather obtuse performance bottleneck has boiled down to this very small query. I have done some empirical analysis and I think I might be getting ...
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1answer
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Ext2 block structure: size of reserved GDT Blocks

In every publication I found about ext2, the structure of a block group is defined as following: Super Block: 1 block Group Descriptor: N blocks Data Bitmap: 1 block Inode Bitmap: 1 block Inode ...
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Can linux systems on multiple virtual machines share the same swap partition? [duplicate]

I'm trying to save some disk space between multiple systems and re-using the same swap partition (which seems to be fine). I'm now getting into multiple virtual machines and am thinking of a ...
2
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1answer
4k 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: /, ...
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Download copy of file which updates on change

Sorry about the title, I didn't know how to write it - It's kind of confusing. Ok, I am using my Raspberry Pi (Debian) and I store code on this server in which people have access to. My problem at ...
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1answer
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convert /dev/md0 to /dev/sda1

I used a Software-RAID I and want to access the data without RAID now. After mdadm --fail /dev/md0 /dev/sda1 mdadm --remove /dev/md0 /dev/sda1 I tried mount -t ext4 /dev/sda1 /mnt but dmesg ...
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1answer
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skype not found on Oneiric 64, but it is right there [duplicate]

Possible Duplicate: Can't execute some binaries in chroot environment (zsh: Not found) I have something weird here. Cannot find a file although it is right there. $ skype command not ...
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1answer
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Mounting ufs partition with read/write permissions on ubuntu 10.04

According to this writeup ufs kernel module is compiled with only read permissions. I could mount a ufs partition with this command: sudo mount -t ufs -r -o ufstype=ufs2 /dev/mapper/loop0p1 ...
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Changing user and group ID system wide (including file system attributes)?

(this question possibly related to Linux: simulating/masking user ownership upon mount of 'external' partitions? - Stack Overflow) I typically use Ubuntu (currently 11.04) as my desktop OS; let's say ...
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1answer
736 views

immutable-like flag for perms

Is there any chattr flag that would allow me to lock a file's unix permissons, and not change them without resetting the flag? The file itself should still be modifiable, I just want to prevent ... ...
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FUSE Overlay filesystem for “too long filenames”

Is there FUSE overlay filesystem, that: * resolve on it's own "too long filenames" for underlying filesystem * otherwise (for filenames fitting into limits of underlying filesystem) just proxy 1:1 ? ...
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Do both “stat -f” and “cat /etc/fstab” show file system ids?

On Ubuntu 14.04, I am checking the filesystem for my home based on a file new in it: $ stat -f new File: "new" ID: 38d4cd29e44142c6 Namelen: 255 Type: ext2/ext3 Block size: 4096 ...
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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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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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What is this data that keeps reappearing after partition delete + new partition creation?

I deleted a big extended partition containing an ntfs logical partition with high percentage of occupied space and from that extended partition I made a new, smaller extended part. In it I ...
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RPM command stuck/FREEZE when installing RPM file

I want to install the following rpm from some reason RPM is stuck or freeze and not install the RPM package also I cant stop it by control C , please advice what could be the problem ? root]# rpm ...
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Ext2 filesystem for /boot partition

Is the ext2 filesystem good for /boot partition? I set ext4 for / root partition, but wasn't sure which filesystem to select for the /boot partition, and I just set ext2. Does it matter in this case?
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How to make an unallocated space “exist”?

I have Ubuntu and Windows installed together. I'm going to install Arch also along with them. For now, I what them to live there all together in my computer. I have the following: I'd like to ...