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

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/proc/fs/jbd2/partition/history is not listed in my ext4 journal partition

I want to read the history file under my ext4 partition that is marked as journal. I have the /proc/fs/jbd2/partition/info file that produces the summary of what happened in the partition so far, but ...
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1answer
7 views

GRUB Rescue - Cannot use insmod, msdos3 does not appear and bootable CD is not working. Please help

First, I must confess that I know almost nothing about Ubuntu, GRUB, GNOME, or anything else to do with Linux. I've been using Windows for as long as I can remember, so my experience with Ubuntu spans ...
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1answer
15 views

what is the default ownership permission of /var directory?

I just messed up with my /var permissions , setting the chmod -R 775 and chown $USER:USER to it.. My poblem is, i want to set its default permission. Is there someone who can help me on this problem? ...
2
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1answer
23 views

How to get rid of disk icons in Unity launcher? [duplicate]

I have got here an installation of Unity and I am annoyed with the 3 disk icons in the Launcher right below the workspace switcher. Is there a way to prevent these icons from showing? Those 3 icons ...
3
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2answers
25 views

vmlinuz and initrd strange files appeared in “/” directory

I have recently noticed that four new files have appeared in my / directory: lrwxrwxrwx 1 root root 33 Apr 9 14:07 initrd.img -> boot/initrd.img-3.16.0-34-generic lrwxrwxrwx 1 root root ...
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0answers
25 views

How to allow only one program to read/write to a file at a time in Ubuntu?

Is there any way in the OS, to issue read/write lock on file? I mean, the file itself should not open, if a lock is issued! NOTE: Don't give me programming solutions.
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2answers
52 views

What harm can a cold reboot cause into your computer? [closed]

I was taking a look at the game DEFCON, and it froze my PC. Unfortunately, I only discovered the REISUB thing after a cold reboot. Now, what harm the cold reboot caused into my computer? Any type of ...
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2answers
66 views
+50

How to run a script when a directory is changed by another user?

I know has been a bit of discussion about topics similar to this. But here is what I am basically trying to do. I have a watch directory called watched and whenever a file is added to that directory, ...
11
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1answer
169 views

Where are SMS and MMS stored?

I have BQ Aquaris E4.5 Ubuntu Edition phone and I'm not able to get MMS. If someone sends me a MMS, I just get empty message with no sender or anything. I can see those messages in message-app but ...
0
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1answer
20 views

btrfs performance parallel access

I'm running a Raid5 (3x 500GB Sata2 HDD) based on btrfs 3.12 (Ubuntu 14.04 x64) and a VirutalBox VM uses this volume. As long as no other process accesses the volume, the VM runs fine. But recently I ...
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0answers
9 views

How to hide btrfs devices in nautilus dynamicly

According to this question and answer: How to hide btrfs devices in nautilus? Is it possible to do this dynamically? Devices like /dev/sdc1 might not be the same on next boot, so a static ...
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0answers
13 views

purpose of bamf-2.index [duplicate]

What is the purpose of /usr/share/applications/bamf-2.index ? I have noticed the applications it contains are installed in my computer. But I don't think it contains the complete list. Because the ...
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0answers
17 views

Linux, boot safe mode - repair broken packages not working?

Xubuntu 12.04 Application windows started to open only partly functional/broken? Some do not display fully, are not able to minimise, expand or close (missing these buttons) and are visually flat - ...
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0answers
35 views

Read only filesystem?

Whenever I try running apt-geti get this error: mike@mike-ubuntu:~$ sudo apt-get upgrade [sudo] password for mike: sudo:unable to open /var/lib/sudo/mike/1: No such file or directory W: Not using ...
0
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1answer
15 views

Is O_NOATIME safe to ignore?

I am designing a filesystem to be implemented in FUSE. I have a question regarding what is allowed and best practice. There are 2 scenarios: User process calls open(..., O_NOATIME). Filesystem ...
1
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2answers
30 views

Folder permissions changed [duplicate]

I have very specific questions regarding permissions. I have delved into the FilePermissions Wiki - https://help.ubuntu.com/community/FilePermissions Recently I installed an ecommerce open source ...
2
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2answers
29 views

How to protect essential Windows files on NTFS partition from edit/deletion in Ubuntu?

So I made a mistake yesterday, accidentally deleting essential Windows files when working in Ubuntu (namely NTUSER.DAT). Just quickly my system set-up: I have Windows 7 (NTFS partition) and Ubuntu ...
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0answers
33 views

Ubuntu: Unable to mount SD card

I did go through other similar questions and realized that although the questions are the same but for the different reasons. Nothing so far I have tried based on online-help or suggestion helped me. ...
2
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0answers
22 views

What's up with the sudden appearance of .AppleDouble folders all over my filesystem?

Something I have never seen on my Ubuntu machine before now- .AppleDouble folders have appeared in many different folders all over my filesystem. It creeped me out- like someone on a Mac was looking ...
2
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1answer
23 views

Number of files shown via Properties and when copying are different?

I have looked at "Properties" of a folder to see the number of files and the folder's size. When I decided to copy the folder to my Desktop, number of files and the folder's size shown on the progress ...
0
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1answer
25 views

Dynamically set user groups for directories and files on a directory

I have made some vhosts which resides on my home folder, and i have given the group access to www-data user. This way the project (a web system) renders on the browser. This is a symfony based ...
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2answers
1k views

Does the /dev/null file actually have a fixed size?

I have just found out that /dev/null is a file and not a directory. I'm just wondering if it has an actual file size.
2
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1answer
14 views

Get back Documents folder? [duplicate]

I deleted my documents and downloads folder. How can I get them back. I don't want them to be like any other folder, I would like it to be like how it used to be where it shows on the side of the ...
0
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1answer
23 views

I want to resize my mount point partition of ubuntu 12.04 and install winndows 7 .HOw can I do that? [duplicate]

I want to resize the Ubuntu 12.04 partition and install Windows 7. How can I do that? Please refer to the screenshot of Gparted editor. I want to resize the dev/sda3 partition.
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Ubuntu hard reboot. Failed to power

I was told to do a hard reboot on my ubuntu 14.04.2 Ubuntu Desktop. Once i did it didn't turn completely back on. So i got prepared to run fsck, So i put in the recovery disk and rebooted my computer ...
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1answer
18 views

In a dual boot, why can I see and mount the Windows partition, labeled 'OS'? [duplicate]

Does it present a security threat in any form?
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0answers
37 views

I can't access into my Ubuntu account 14.04

For disgrace I have asked advice in "chiedi Ubuntu" forum - the Italian version of ask Ubuntu - and for following their advice, I can't get anymore in my Ubuntu account due to internal errors of the ...
0
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1answer
44 views

Manual Partitioning During Installation: Understanding File System Types

I am wondering if anyone can help me understand the difference(s) between the different file system types: ie. swap, ext4, reiserfs, etc... I am working with the manual partitioning during ...
0
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0answers
31 views

How to repair NTFS Filesystem

how can I restore NTFS filesystem...i had a partition on a 1 TB hard drive now on fdisk -l I receive 2 unknown systems one with id 72 and one with id 6c. I tried chkdsk in windows without success. ...
3
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1answer
34 views

Why does the path // exists? [duplicate]

I have on occasion accidentally typed this to change to the root directory. $ cd // It works fine and I am in the root directory because ls returns same results as if I am on root. But why is this ...
0
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1answer
30 views

Irremovable folder after wiping free space with bleach bit

I have a following problem. Yesterday I was using Bleach Bit as root to wipe free space. When I woke up Bleach Bit was not Responding and the terminal hangs on "suffix length = 235". So I force Bleach ...
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6answers
7k views

How is 'rm -rf /' able to delete all files in the system?

I haven't tried this command on Ubuntu (for obvious reasons) so I am not sure if Ubuntu will allow its execution. But it's famous for deleting everything. Just out of curiosity, what happens when the ...
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2answers
49 views

/opt folder missing in Ubuntu 14.04

I'm trying to install Eclipse "by the book" in /opt, but when trying to access /opt, it seems that /opt directory doesn't exist in Ubuntu 14.04: $ cd /opt/ bash: cd: /opt/: No such file or directory ...
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0answers
18 views

How to mount UBIFS/MTD partitions?

I have a lovely mount: unknown filesystem type 'ubifs' error with Ubuntu 14.04. What package provides this functionality? It should be included in some previous versions of Ubuntu. The mtd-* ...
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3answers
45 views

Unnoticingly I deleted a directory. Is there a way to recover it?

I found something over the internet here https://www.howtoforge.com/data_recovery_from_accidently_deleted_files_or_crashed_drives_in_ubuntu ...
11
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5answers
506 views

Launch nautilus in location navigated to in Terminal [duplicate]

I find it rather hard to travel through my system using nautilus and much prefer using the cd etc commands in Terminal to get around my system, but I find that sometimes I do need to look at a list of ...
1
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1answer
56 views

Location of edited text files on Ubuntu touch

Where does the Ubuntu-touch editor (Edit from the Ubuntu store on the bq aquaris 4.5) save files? I am able to open files I edited on the "local files" menu, but I cannot find where they are stored on ...
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0answers
29 views

installing exfat-fuse: Error: can't find signing_key_fingerprint

I have a samsung evo 64gb, which has apparently been formatted with the microsoft exfat filesystem. I wish to mount it on an ubuntu 10.04 system. There are many responses in respect of how to do ...
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1answer
176 views

Where do deleted files go in Ubuntu?

I have a very simple question. Where do files go when you delete them? I know when I send files to "Trash", they go to "trash", but when I delete them, I do not know where they go.
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1answer
34 views

Replacing /etc/resolv.conf

I'm running Ubuntu 14.04 alongside windows 8.1. But in no way could I make the Internet work. I messed up trying to replace the /etc/resolv.conf file and it got removed... I would like to download it ...
0
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1answer
18 views

Missing File After Destroying KVM

I am using virsh to manage my KVMs on Ubuntu 14.04. I store my disk path targets (.IMG files) on an LV and mount it manually. I, of course, forgot to mount this LV after a restart but virsh was still ...
0
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1answer
22 views

Input/output error on /etc/shadow

the file /etc/shadow seems to be corrupted as every time I try to remove it throws an input/output error. Now this is a problem because it contains my passwords and I get login without it. Anyone now ...
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0answers
18 views

is it safe to trash .fuse file [duplicate]

Is it safe to send a .fuse file into trash? I do not remove it. I just want to send it to trash. Since files after trash are still accessible via the software it must be Ok. I just want to make sure. ...
0
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1answer
33 views

How increase filesystem size on ubuntu running inside windows [duplicate]

I am using ubuntu 14.04 and currently i am running it in the inside windows mode installed with Wubi. My problem is my filesystem is running on low disk space. Can i extend the filesystem size without ...
1
vote
1answer
33 views

ntfs-3g Failed to decompress file

For years the logs of my Ubuntu systems sharing drives with a Windows installation have been routinely flooding logs with: Mar 17 11:00:50 kemosabi ntfs-3g[483]: ntfs_attr_pread error reading ...
2
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1answer
40 views

Mount - Problem Remounting /dev/sdb1

How can I properly remount /dev/sdb1? Because when I remount it: sudo mount -o remount,rw /dev/sdb1 mount: cannot remount /dev/sdb1 read-write, is write-protected ...displaying that it is write ...
2
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2answers
62 views

I need help mounting an lvm2 partition with 14.04 LTS live USB

SOLUTION: I was able to mount the partition and copy the files to another drive! sudo fuseext2 -o ro -o allow_other /dev/mapper/vg1-lg1 /mnt was the key. I still have not been able to access the ...
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1answer
64 views

Xampp htdocs folder , sub folders and all files permiossion

I am not familiar with Ubuntu , i copied my project folder in htdocs but when i open my project in browser it loads but styling files (css files) doesn't loads . Its permission problem . I have done a ...
0
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0answers
20 views

Is there a way to log rejected file access attempts in the Linux file system?

It often happens when you install a new program or when you just configure something, that you hit issues with the file system permissions because you don't have the folder/file permissions set ...
0
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2answers
44 views

Windows can view directories but not ubuntu

Ok. I know i messed up by hibernating one OS and working in other. As i remember i hibernated the Ubuntu. Now a lot of directories are not showing up in ubuntu. But shows up & works in Windows. ...