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

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29
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File system compatible with all OSes?

I use Linux and Mac OS X on a regular basis, and sometimes I have to use Windows. I need to use a flash drive on all three, and I need a filesystem that will work well on all of them. None of the ext'...
2
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1answer
83 views

Listing script's file dependencies

Given a shell script, is there an easy way to extract what files it manipulates explicitly (so not like concatenating some command and than eval-ing it)? E.g. #!/bin/bash . /etc/someconfig.cfg ...
8
votes
1answer
241 views

How to re-size partitions in a complete hard drive image?

I have taken a complete image of a hard drive using: dd if=/dev/sda of=/home/user/harddriveimg bs=4M It would seem to me, that I should be able to re-size the partitions within it after suitably ...
3
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3answers
2k views

How is GRUB able to read it's config file on ext3 fileystem?

I have read that GRUB can read ext2 filesystems and has modules for doing this. What is the location of the mod on a Redhat system and how about if the /boot partition is ext3/ext4 or other filesystem ...
3
votes
2answers
2k views

Filesystem monitoring

A script where we need to come up with a way for the disk space monitoring to be smarter. On smaller file systems, we still want to alert at 90% full, but on larger file sytems, we should only alert ...
5
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2answers
1k views

Why is cd not a file in /bin? [duplicate]

Possible Duplicate: Why is cd not a program? I noticed that every other commonly used util, like ls, cp, rm, etc. are actually files in /bin -- but cd is not. Nor is it in any other binaries ...
1
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0answers
28 views

How can I access (including read and write) a linux file system from a windows machine on the same network [duplicate]

Possible Duplicate: How to share files between Linux and Windows? I have a Linux virtual machine (Hyper-V) acting as a web server on my network. I would prefer to browse it's file system from ...
2
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4answers
184 views

Is there a structured format of version info for OS-level executables?

I am looking for a structured format of version info for OS-level executables, such as in /usr/bin and /usr/local/bin. The problem we are having is the inconsistent architecture between our PROD and ...
2
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0answers
247 views

Can a FAT32 and NTFS file system exist without UUID?

I have an USB disk drive partioned with 2 FAT32 partitions, which is not getting detected in the embedded device, but gets detected in a Fedora system. Basically in the udev rules, I am not able to ...
2
votes
1answer
245 views

What does the CONFIG_NLS_UTF8 kernel option do?

The kernel configuration contains an NLS_UTF8 option. It can be found under File systems → Native language support. What does it do? Its description maintains that it is needed for using a FAT or ...
8
votes
1answer
5k views

On the Fly Compression for a Directory

I have a directory that is always going to be storing text files that are rarely (think weekly) used. Naturally this is a great place to use compression. However, rather than having to use tar ever ...
2
votes
2answers
91 views

'tie' [nonexisting] files to programs

Recently, I just had an idea which turned out to be pretty useful under certain circumstances. But first some simple explanation: In Perl, you have the option to tie variables to some functions ...
5
votes
2answers
5k views

Must the filesystem be unmounted while extending an LVM logical volume?

I have seen some tutorials on extending an LVM2 logical volume. None of them instruct you to unmount the filesystem. They claim that you can extend an LVM volume while it is in use. Is this right?
1
vote
2answers
270 views

zfs one pool error

I have zpool with name zroot and zroot has 4 pool when electricity down system reboots and than i saw some error with 1 pool: Solaris: Warning: can`t open object for zroot/var/crash log_sysevent: ...
4
votes
1answer
2k views

Removing files that do not exist

I apologize for the possibly misleading title, but it is the best way I could think of to describe the problem, which is: I have several files that I can cat, but when I try to rm them I get a "No ...
5
votes
1answer
477 views

Can I read and write to alternate HFS+ file forks or NTFS data streams from Linux?

It's possible to mount both Apple HFS+ and Microsoft NTFS filesystems under Linux. Both filesystems support multiple content streams per file, though this is not widely used. Apple uses the term ...
1
vote
1answer
1k views

Trigger action each time a file is modified [duplicate]

Possible Duplicate: Can a bash script be hooked to a file? Is it possible to mount a mechanism to a file to perform an action (e.g. mark the change in some log file and such) each time the ...
0
votes
1answer
481 views

File permission mechanism in Unix like systems

Can some one please explain with a an example the file permission mechanism in Linux and other Unix like systems ? What are the nine bits for ? Why do we have a group id for a user as well as for a ...
2
votes
1answer
2k views

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 ...
2
votes
2answers
3k views

Sphinx Search shutting down after `FATAL: accept() failed: Too many open files`

I'm running Sphinx Search Server V2.06 ( the latest stable release ) on an Amazon EC2 with Linux CentOS. In general it is running fine, but the searchd.log is showing this error over and over with ...
4
votes
1answer
628 views

Any command to view the file system internal fragmentation size under a directory?

If the block size of a file system is 4KB, then for a 1KB file, 3KB space(which is internal fragmentation) is wasted. So, under a directory, is there any command to summarize how much disk space is ...
6
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2answers
9k views

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 ...
9
votes
1answer
1k views

Why could the size of the “dot” file “.” exceed 4096?

Today I found an "empty" directory with a size of 4MB. It had no visible contents, so I tried ls -lah. This showed me some hidden files (not very large). Searching for the reason why the directory ...
1
vote
1answer
614 views

Read/write access on raw NTFS image

I backed up an entire 32GB NTFS partition to a raw image with with dd. The file-system on the partition in accessible under Debian after mounting with: $ sudo mount -o ro,loop /media/Path/To/...
2
votes
1answer
250 views

Why is some filesystem space used even though the filesystem is empty? [duplicate]

Possible Duplicate: ext4: How to account for the filesystem space? After googleing a little I find that ext4 reserve 5% for root: Reserved space for root on a filesystem - why?, ext2/3/4 ...
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0answers
632 views

Negative hdd usage. Available is larger than fullsize

Having issues with space accounting of lvm volume. 23G is available. But the full size of the partition is 20G. (So, it shows "-4.1G used" 0_O) > df -h Filesystem Size Used Avail Use% ...
6
votes
2answers
378 views

What filesystems preferentially reuse blocks from deleted files?

Related to this earlier question I asked, I'd like to know what filesystems will preferentially reuse blocks that are freed when files are deleted (if any exist)? I am only interested in stable, well-...
2
votes
2answers
2k views

Is there an excellent tutorial on how to resize a rootfs partition (and shrink another) on a drive that is 100% allocated?

I'm experiencing the all-too-common "root partition full" situation. 100% of my hard drive is allocated. My home (ext4) partition has plenty of space to give up for my full root partition (rootfs). ...
3
votes
1answer
211 views

How do I choose between ext 3 and 4?

I tried looking at the difference, the main ones seem to be 4 supports more subdirectories in a file, supports larger files, has delayed write which I don't prefer as I don't want data loss. I also ...
54
votes
1answer
112k views

How to determine the filesystem of an unmounted device? [duplicate]

Possible Duplicate: Find filesystem of a partition from a script How to show the filesystem type via the terminal? I'm looking for a command that yields the filesystem type as mount would ...
4
votes
1answer
302 views

Unix and Linux without a file system?

I was reading Eric Raymond's the Art of Unix Programming, (Amazon and online) and at the very beginning of the book where he analyses what Unix does wrong he says: Having a file system at all may ...
39
votes
2answers
114k views

How to show the filesystem type via the terminal? [duplicate]

Possible Duplicate: How to tell what type of filesystem you’re on? Find filesystem of an unmounted partition from a script How can I quickly check the filesystem of the partition? Can I do ...
3
votes
3answers
991 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 ...
1
vote
1answer
486 views

About sector and blocks, and a little confusion in /proc/diskstats

I've been studying about diskstats lately, and I get that the amount of hdd read comes in sectors. But in most places I've noticed that there exists a slight misunderstanding about sectors and blocks. ...
2
votes
1answer
4k views

cannot 'ls' /mnt directory

I have a CentOS-6 machine that I'm working on that is running a live database. It's having a problem with the /mnt directory. I cannot ls the directory for some reason. stat is working and shows ...
1
vote
0answers
303 views

Unable to access Linux share from a Windows machine with NT_STATUS_BAD_NETWORK_NAME error

On the Linux machine I changed the smb.conf like this: [john] path = /root/john/downloads available = yes valid users = john read only = no browsable = yes public = yes writable = yes The path /...
0
votes
1answer
129 views

Filesystem writes seemingly lost

I've been experimenting with tcpdump, and I've found some very bizarre filesystem behavior. It doesn't look to be a tcpdump problem as I'll explain in a second. The following command produces no ...
0
votes
1answer
1k views

Does using lvextend destroy data already on the volume?

Does resizing a logical volume with lvextend and e2resize destroy data already on the volume? See also this related unanswered question and some examples of the process: Can I resize the root ...
6
votes
1answer
7k views

Difference between “chmod 775” and “chmod 2755”

What is the difference between "chmod 775" and "chmod 2755"?
6
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2answers
259 views

du command show a slash after directories?

How to use du command show a slash after directories? For example: du -ab /root/test/php-5.4.8/ Result: 1781 /root/test/php-5.4.8/main/internal_functions.c.in 973596 /root/test/php-5.4.8/...
2
votes
3answers
1k views

What logs would be written if file system is full in UNIX?

I am working on a unix server and I guess during some time in past the file system had been full. However, I need some solid data to prove it. Will there be any OS logs or something of that sort to ...
2
votes
4answers
4k views

Automatically change file permission upon write to a folder

How can I create directories so: /data /data/user1 /data/user2 and make sure that whenever root writes inside them, depending on which directory it writes to, different owners are set. Example: ...
2
votes
1answer
3k views

How to unlock read-only filesystem on OpenWRT router linux distribution?

I have installed minimal OpenWRT firmware on Linksys router. When I try to modify some of the files withing /etc/ directory for example firewall.user file by using command vi firewall.user it opens ...
2
votes
2answers
2k views

Filesystem type on Solaris 5.10

How can I get the file system type for each device on Solaris 5.10? I tried mount with no args but that only listed each mount point, similar to df. Also, how can I find where a specific directory ...
32
votes
2answers
22k views

What happens when you delete a hard link?

If you do rm myFile where myFile is a hard link, what happens?
36
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3answers
15k 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 ...
4
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2answers
1k views

How to create low-overhead file system

I have usb keychain with size of 7.5GB and I need to copy file on it with size 7.4GB. But I can't because superblocks consume 0.5GB of space.
5
votes
3answers
396 views

Effectivity of shred on different file systems

man shred warns that the command is not useful on file systems that don't overwrite in-place. I don't have much knowledge about the current and upcoming file systems, but I would suspect that many of ...
0
votes
1answer
68 views

/ permissions on a linux filesystem

Does the / have permissions attached to it? If so what are they and what command do you run to find out? The reason why I ask this is to know weather a NFS mount reflect this if your export is set to ...
3
votes
3answers
613 views

A lot of errors on ext4, however smart doesn't show any errors

I have a Debian box with additional ( it is not a system disk ) 1.5Tb sata hdd (wd caviar green). There is only one partition on the whole disk. Disk is used for backups from remote system (with ...