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

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4
votes
1answer
53 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
votes
1answer
12 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 ...
0
votes
0answers
7 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 ...
0
votes
0answers
11 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 ...
0
votes
0answers
12 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 - ...
0
votes
0answers
22 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
votes
1answer
13 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
vote
2answers
28 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
votes
2answers
26 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 ...
0
votes
0answers
21 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
votes
0answers
20 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
votes
1answer
20 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
votes
1answer
23 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 ...
22
votes
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
votes
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
votes
1answer
19 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.
0
votes
0answers
18 views

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 ...
0
votes
1answer
17 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?
1
vote
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
votes
1answer
38 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
votes
0answers
23 views

Copy Problem application is not responding [closed]

When I start to copy some thing it starts with a instant speed of near about 23 Mb/s and after some time it falls down to 5.8 Mb/s not only after some time copy option does not respond. I have some ...
0
votes
0answers
30 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
votes
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
votes
1answer
22 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 ...
49
votes
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 ...
2
votes
2answers
40 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 ...
0
votes
0answers
15 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-* ...
0
votes
2answers
33 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 ...
9
votes
5answers
488 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
vote
1answer
45 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 ...
1
vote
0answers
23 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 ...
7
votes
1answer
173 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.
0
votes
1answer
32 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
votes
1answer
17 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
votes
1answer
21 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 ...
0
votes
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
votes
1answer
32 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
31 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
votes
1answer
36 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
votes
2answers
58 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 ...
1
vote
1answer
58 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
votes
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
votes
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. ...
2
votes
2answers
25 views

Is there a way to backup and restore basic file / folder permissions on Ubuntu the way that there is using icacls in Windows?

In Windows you can do this (backup and restore basic file permissions) can this be done in Linux? And to clarify, by basic file permissions I don't mean ACLs in Linux, I mean the default permissions ...
0
votes
0answers
26 views

Is there a way to backup and restore ACL file and folder permissions on Ubuntu the way that there is using icacls in Windows?

In Windows you can do this (backup and restore ACL permissions) can you do this in Ubuntu? And to clarify, I mean ACLs in Linux, I do not mean the default permissions modified with chmod / chown. ...
1
vote
1answer
21 views

Where to put binary file?

I am packaging my own application into .deb. According to this, my compiled application should be installed in /opt/my-package. However, the tool Lintian reports such error: E: dir-or-file-in-opt ...
0
votes
1answer
33 views

Which subdirectories of / should have compression disabled in btrfs root filesystem?

Imagine you set up your root filesystem to be btrfs with Ubuntu 14.10 defaults (one subvolume for / and one for /home) and you want to compress and deduplicate as much as possible. Which directories ...
0
votes
1answer
55 views

df is omitting some whole parts of my fs / disks. Is there something wrong?

EDIT(2015-03-08): I think this behaviour is caused by ubuntu-sdk using schroot and overlayfs to install its dev kits. See ...
1
vote
1answer
32 views

I have a directory named -H and would like to change the name of it [duplicate]

I am taking a class at Pluralsight and made the mistake of typing 'express -H' as instructed. Now I have a dir named -H and Ubuntu will not let me access it or otherwise deal with it. I would like to ...
0
votes
0answers
28 views

Apparmor problems

I followed this persons solved question here on how to mount Apparmor: https://forum.backbox.org/general-support/apparmor-is-not-working/. After I did however, I came up with this black screen with ...