Questions dealing with Ubuntu's layout of files, permissions, and files that reside in special locations on disk.

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How to Confirm user group permissions in the current fuse user group

I have created a folder "mtp" in /Media and its /media/mtp. The basic property tells: Type:- Folder(inode/directory) and in Permissions it shows Owner and Group as root. It says you are not the ...
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2answers
26 views

tmp file in root folder with large size/ very long name

As the title, I have this file in root folder and I don't know what it is. Can I safely remove it? -rw------- 1 root root 925M lug 22 15:28 tmpTKb8nhN6ke4IJ bnWrrgcIz-iyhS8H5V ...
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1answer
28 views

Why are the MBR and GRUB present as files in the Linux filesystem?

A computer's master boot record consists of raw binary and does not reside on any sort of partition. Legacy GRUB and GRUB 2 are installed to the sectors inbetween the end of the MBR and the start of ...
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68 views

No mountable file systems on Macbook Pro

Downloaded 14.10 to install on a Macbook Pro. Then I get a message ubuntu-14.10-desktop. no mountable file systems
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1answer
33 views

I rm -rf'd /var/!

I recently rm -rf'd all of /var/ on my box and I've made a VM with the same OS/bit, I plan to upload all of the contents from the fresh VM and replace my messed up /var/ on my box with it. What's a ...
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2answers
24 views

Number pair prefix to config files

I have noticed some config files having a prefix. E.g. Inside my /etc/php5/cli/conf.d: 05-opcache.ini 10-pdo.ini 20-curl.ini ... Could someone explain this? I am thinking something along the ...
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2answers
32 views

Is there anyway to undo wipefs?

So I (very stupidly) performed a wipefs on my XFS formatted 4tb Linux (software) raid 5 array in trying to convert over to a bcache setup (I was following some instructions online and should have paid ...
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1answer
47 views

Cannot delete a folder

I have Segate backup + 1TB external HDD recently since 1 month i am unable to copy the files effectively sometimes the copying is 10 kb/s like that. and sometimes iam getting error like Input/output ...
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1answer
38 views

chown not working on remote filesystem, other commands (e.g., chmod) do work

I am trying to change the ownership of a file on a remote filesystem, but chown responds with chown: changing ownership of ‘foo’: No such file or directory However, as you can see, foo is there and ...
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1answer
59 views

File system went read only after adding ssh key

I followed this guide to set up ssh key on my digital ocean droplet, but since I made step 4 my file system went read-only. I changed /etc/ssh/sshd_config from PermitRootLogin yes to PermitRootLogin ...
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1answer
69 views

File creating permission Denied [duplicate]

I have removed Windows 7 and installed Unbuntu 14.04. I have successfully installed LAMP but the problem is that I cannot save a file with a PHP extension in local-server using the Bluefish editor . ...
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32 views

How to disable LVM for sda?

When I installed Ubuntu 14.04, I check use LVM option. I want to disable LVM for sda, but I don't want to wipe this disk. Is it possible?
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106 views

Unable to create a directory on a mounted file system (FUSE). mkdir: cannot create directory `dirname': File exists

I was trying out the FUSE file system. I downloaded fuse 2.9.3 and installed it to a directory in my Home directory. I did rest of the work as superuser (as I was denied to manipulate the mounted ...
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1answer
32 views

Copy a file from one ext4 partition to other

I have two ext4 partition and I want to copy some files from one partition to other in GUI not using terminal, but it does not allow me to do so. It simply a root permission problem. I just want to ...
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2answers
178 views

Is XFS a distributed file system or a journaling file system?

Is XFS a distributed file system or a journaling file system? In Wikipedia it says that XFS is a journaling file system, but in the Berkely website they mentioned that it is a serverless file ...
1
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1answer
138 views

Sanddisk drive write protected

My sanddisk usb write protected i tried ashokkrishna@ashokkrishna-Lenovo-B560:~$ sudo mount -o rw /dev/sdc1 /mnt mount: block device /dev/sdc1 is write-protected, mounting read-only # sudo mkfs -t ...
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1answer
60 views

Fat32 mounting as read only

I've edited my /etc/fstab to contain the following: UUID=F285-17E1 /media/TV-1 vfat rw 0 0 UUID=6CBA-1DEC /media/TV-2 vfat rw 0 0 UUID=7D3B-170D /media/TV-3 vfat rw 0 0 UUID=BBFF-1EE4 ...
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0answers
28 views

gdisk before umount -> file system corrupted

I think I did something stupid, but I don't know how to fix it... Please help: I connected a NTFS format 2TB HDD to my ubuntu, and would like to format it to ext4 I mounted it, and copied the files ...
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0answers
259 views

An error occurred while mounting /

for no reason I have not been able to boot Ubuntu 14.04 today. Splash screen at first displayed "An error occurred while mounting /". I tried to do filesystem check: ubuntu@ubuntu:~$ sudo fsck.ext4 ...
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1answer
23 views

New File System drivers for ubuntu [closed]

I have done some kernel development previously, simple ones really. I wanted to know what direction I should be looking in to create a custom files system of my own. Most things I have found with a ...
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0answers
34 views

Encrypting filesystems on 14.04

I recently installed Ubuntu 14.04.1 server on an HP ProLiant ML110 which had previously been running 12.04 and which has two additional hard disks containing data in an unencrypted form. I didn't ...
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2answers
43 views

Media Scanner Script

I am a beginner with Bash scripting. I have recently been working on a script to harden Ubuntu computers for a school project. Everything is going well, except that the students are not allowed to ...
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24 views

Mount disk with write permissions but leave it untouched

I have a raw image that I would like to mount to my system (Ubuntu 12). The problem is that I don't want to write anything to the disk itself, so the raw image will stay as it was before mounted. I ...
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1answer
12 views

What file lets me change the directories linked to through the places menu

I'm sure I've edited this before but I've searched around for answers and I can't seem to find what the file was. (ex to change the location of the pictures link under the places menu to somewhere ...
1
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1answer
65 views

How to recover after all files are deleted from /var folder?

I accidentally deleted all files inside folder /var. Now, my computer restarts but switches to Command line interface. So, how to make my system work as before?
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2answers
29 views

Default to showing and using pathbar in Ubuntu file dialogs?

I have fresh installs of Ubuntu and am trying to get it to default to showing the path bar in file open dialogs. Currently, if I am prompted to save or open a file a file dialog is shown but defaults ...
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1answer
53 views

How to Create Virtual Block Devices

I want to create multiple virtual block devices like /dev/sda and then use them to create an md device for test purpose. I have mounted my root filesystem on /dev/sda1 and don't have extra space to ...
2
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1answer
115 views

Accidentally partitioned media drive as ext3 during install (was ext4), how can I recover?

I recently did a fresh install of ubuntu on a system with an old ubuntu install. I have a separate hard-drive which used to have a single ext4 partition, but during the install I accidentally selected ...
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44 views

Can't remove or list a file inside Dropbox directory

I tried to delete a directory named .dropbox.cache under Dropbox folder(dropbox was not running or not started yet) with sudo rm -r -f <directory_name> but it results rm: can't remove ...
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0answers
33 views

Can't install OR liveboot 14.04.1

At the moment, I'm constantly having "can't find a medium with a filesystem" thrown back at me. This is an improvement from the thousands of squashfs errors I used to get (using a differnet USB drive, ...
1
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1answer
18 views

Minimizing effects of large number of files

I need to manage a filesystem with a large number of files (hundreds of thousands). This filesystem is rsynced periodically. The vast majority of files don't change often, but since there's so many, ...
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2answers
68 views

Directory using more space than expected

I have a directory on Ubuntu that contains 262144 files. Each file is a 25x25 png image. On average these files are approximately 1.14kb and no file is larger than 2kb. Yet this directory is using ...
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27 views

Windows VBox ubuntu vdi Error: unknown filesystem … grub rescue

Win 2003 Server --> Virtual Box --> Ubuntu 14 After running chkdsk/f on Win 2003 one VM (.vdi) stopped working Error: unknown filesystem. Entering rescue mode... grub rescue> _ And there it hangs. ...
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1answer
92 views

How do I fix a bad /etc/fstab if the hard disk read-only?

I had created a bootable hackintosh usb stick but I found that I had a problem that could be solved by renaming a file or editing another. But the usb stick was read only and, in a moment of ...
0
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1answer
67 views

How can I make update-manager require less free disk space on root partition

My system contains a relatively small root partion (around 16) and the rest on home. Now my upgrade from 14.04 to 14.10 fails because it needs 8 GB of free space on root but I only have 4 GB and I see ...
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1answer
42 views

Monitor folder contents changes

I can monitor the content changes of a file using tail -f command Is there a similar way of monitoring the changes of a directory structure the way tail -f monitors file? I have a long running ...
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0answers
23 views

I have lags when I'm deleting files from desktop with Xubuntu

I have Xubuntu 14.04 and I am experiencing some lags when I work with desktop icons, especially when I'm deleting them. Haven't notice that with Thunar filemanager and in System Monitor couldn't ...
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0answers
34 views

setup tmpfs on same partition as /etc

I'm using 12.04 LTS. How do I setup tmpfs (I'm assuming this is the tmp directory, please be patient with me I'm not very advanced with Linux) on the same partition as the /etc directory? Current df ...
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1answer
47 views

How can I view thumbnails of pictures?

How can I copy the attributes of the pictures folder so that I can view thumbnails of pictures on, for example, network drives?
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1answer
32 views

Best underlying file system type and configuration for HDFS

I would like to reformat a local drive partition and turn it into a partition for HDFS. Which file system would be most performant for running HDFS on top of it? Any optimizations I should take care ...
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0answers
9 views

chinese floder name is gash when i recived it which created in windows

my chinese floder name echo like this "2014-09-24(yxy)(R-STHRSS20140923-0052)(Çຣ)Ôö¼ÓË«²ãVLANÓëÉ豸¶Ë¿Ú¹ØÁª¹Øϵ" ,file name too. it was created in windows platform,how can i fixed it.
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0answers
321 views

mtp usage: how to mount and transfer files to and from a Samsung: Galaxy model Android phone

how do I use mtpfs to read/write to a USB connected Android phone, connected as a mass storage device: thufir@dur:~$ thufir@dur:~$ mkdir phone thufir@dur:~$ thufir@dur:~$ sudo mtpfs -o allow_other ...
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0answers
82 views

Why MTP mounted files belong to root?

Xubuntu Saucy and an Android device running Kitkat. I connect it to my computer and it is mounted as MTP but the files on it belong to root so I can't modify them. Why is this and how can I change it? ...
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38 views

The / and /usr merge not implemented in my Ubuntu?

Reading through systemd docs I came across TheCaseForTheUsrMerge. The discussion about this topic dates from around 2012 AFAIK, and the opinion then was that all major distribution would incorporate ...
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84 views

Enabling xattr on Ubuntu 14.04

I'm unable to set any attributes on files using xattr -w 'key' 'value' hello.txt I keep getting: [Errno 95] Operation Not Supported: 'hello.txt' My /etc/fstab is: ...
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27 views

No more space in File System

These last day i ran out of space on file system, this means, i can't install more updates, packages, and programs. Does someone knows how can i "expand" my space on the File System... 15.6GB are not ...
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30 views

Convert filesystem to LVM - blocks

I'm trying to convert and ext4 filesystem to LVM. I found a script called blocks that pretty much automates most of it but am having issues getting it working. https://github.com/g2p/blocks#readme ...
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1answer
58 views

Large discrepancy between df and du

My / partition which holds everything (including /home), was suddenly using 100% of disk space. I removed a few files and now df shows $ df -h /dev/sda1 Filesystem Size Used Avail Use% Mounted ...
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0answers
23 views

How to solve my Filesystem check or mount failed problem

I tried to install Ubuntu 14.04 it stall in the middle of the installation so I rebooted my computer and now I get a message that says filesystem check or mount failed.what does this mean and how do I ...
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0answers
20 views

File not modified, Problem in saving JS file UBUNTU

At 13/08/2014 2.30pm I saved my file named script1.js. And OS was Ubuntu 14.04 tasty tahr. Text editor was sublime Text and browser was google chrome. It was containing more than 500 lines of code. ...