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

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1answer
49 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
58k views

How to Fix “Read-only file system” error when I run something as sudo and try to make a folder/file?

When I try to save something or rename a file/folder it say this error " Read-only file system" or run something as root in the terminal it say this error sudo: unable to open /var/lib/sudo/"My User ...
12
votes
3answers
9k views

Can and should UDF be used as a hard drive format?

Several time recently I've seen UDF suggested as the solution to a cross platform format for a drive used on Linux, Mac OS X and Windows XP and above. I've searched here and not found the same ...
2
votes
1answer
121 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 ...
0
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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. ...
1
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1answer
1k 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 ...
8
votes
3answers
17k views

Read-only SD cards

I've got an IcyBox USB hub/card reader combo in my computer, running Ubuntu 12.10. It's got an issue with SD cards. It always mounts them read-only, regardless of the write-lock switch. This is ...
0
votes
2answers
28k views

Recover from a corrupted filesystem when fsck do not help

Something went wrong with my filesystem, Ubuntu set it to read-only and now under Ubuntu Live Disc, fsck can't fix it. I'm running 13.04 and it won't boot - at startup, it just shows the grub rescue ...
0
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1answer
38 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 ...
4
votes
5answers
12k views

Cannot transfer file due to “Filesystem does not support symbolic links” error

When I want to transfer files from my local hard drive to my thumbdrive, I keep getting this error: Filesystem does not support symbolic links. I don't know what this is, I need help with ...
1
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0answers
33 views

Drive path not retained in softwear memory after reboot [duplicate]

Question rephrased to better fit my situation at the time of asking: After rebooting my computer; all memory of recent file use by software programmes accessing files upon my second hard disk, are ...
2
votes
1answer
56 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 ...
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. ...
0
votes
3answers
447 views

Install Ubuntu in dual boot on an encrypted partition

I'm totally new to Linux and I'm trying to achieve something, but I don't know if my plans are okay. I would like to have Windows 8.1 and Ubuntu in dual boot. Windows is on my RAIDed SSDs, and I ...
1
vote
1answer
160 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 ...
10
votes
1answer
19k views

What represent .Xauthority file?

I had a problem wherein I couldn't get passed the login window in Ubuntu 12.04, even though I have the correct username and password, it still comes back to the login screen. I've found a solution ...
0
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0answers
31 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
1answer
60 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 ...
2
votes
2answers
46 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
63 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. ...
9
votes
3answers
15k views

Why does Ubuntu refuse to execute files from an NTFS partition?

I mount an NTFS partition (where I've got some Linux binaries and scripts alongside with Win32 and data files) with the following fstab line: /dev/sda5 /mnt/dat ntfs-3g ...
1
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1answer
23 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 ...
1
vote
2answers
480 views

File Permission In www/html Directory For Security

How can I give permission to directories and files in www/html for security. This files have an .js , .php , .sh extensions.They execute in www/html by apache's user(mine is www-data). When I give ...
21
votes
2answers
31k views

Too many open files - how to find the culprit

When running tail -f filename, I got the following message: tail: inotify cannot be used, reverting to polling: Too many open files Is that a potential problem? How do I diagnose what's ...
30
votes
3answers
21k views

How to move Ubuntu to an SSD

My current situation is: One hard disk Dual boot Ubuntu 11.04 and Windows 7. Partitions: 100MB Windows System thingy 144GB Main Windows 160GB Ubuntu 4GB Swap 12GB System Restore stuff Now I want ...
1
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1answer
33 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 ...
66
votes
11answers
98k views

How can I securely erase a hard drive?

I'm planning on selling a USB external hard drive that currently contains an old Ubuntu installation with stored passwords and banking information. How can I securely erase the drive before selling ...
1
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2answers
828 views

The best way to create a root filesystem, split between read only and writable

My aim is to create a system where the main parts of the root filesystem are stored on a read-only SD card, with writeable parts located on an SSD set to rw. This is to be done with a view to keeping ...
0
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0answers
31 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 ...
0
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0answers
25 views

Why are ext4 filesystems owned by root?

I formatted a flash drive to ext4 and created a new partition on my hard drive with fs type ext4. Both were owned by root and I had trouble writing files. Why does that happen? Also, if that has no ...
0
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0answers
25 views

What is the IO Block property in stat command in ubuntu?

srimanth@srimanth-Inspiron-N5110:~$ stat /home/srimanth/Videos/Better\ Call\ Saul/Better.Call.Saul.S01E02.720p.HDTV.X264-DIMENSION.mkv File: ‘/home/srimanth/Videos/Better Call ...
0
votes
1answer
53 views

I want to move /run/shm to my /home directory

Filesystem Size Used Avail Use% Mounted on /dev/sda6 9.1G 8.4G 214M 98% / none 4.0K 0 4.0K 0% /sys/fs/cgroup udev 1.9G 8.0K 1.9G 1% /dev tmpfs ...
0
votes
1answer
188 views

Migrate root filesystem from btrfs to ext4

I want migrate a Ubuntu installation off of btrfs as root because it frequently hangs and causes out of space errors and I really don't need the snapshots. The partition was created empty and not ...
0
votes
0answers
25 views

How could I set a file overlay on my whole system?

I need to build and test system components on my Ubuntu laptop and I want to be sure that it won't damage (or replace any my current components) (I plan to build and test gtk, gstreamer and ...
0
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0answers
115 views

Stale file handle

i added new structure member for creator in ext2 inode structure at ext2.h, currently i downloaded linux-3.18.7 and modified and i enable the ext2_fs option in.config file, after compilation i entered ...
0
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1answer
18 views

Binding /var during installation

I want to install an SSD into my desktop PC, putting there the root and other folders like /etc. What I don't want to put there is /var, because I work with databases pretty often. So, what I want to ...
2
votes
1answer
55 views

Is it possible to prevent a file from being deleted unless in safe mode?

Is it possible to make a file only deletable when in safe mode on linux? Specifically I am using ubuntu 14.04 and I need to prevent a file from being deleted. If this solution is not possible is ...
1
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0answers
336 views

Explanation of entries in dmesg log in Ubuntu Server 14.04

A few days ago I did a clean install of Ubuntu Server 14.04. Everything is working fine, but when my system boots I get these entries in dmesg log: [ 3.106082] EXT4-fs (dm-0): mounted filesystem ...
1
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0answers
57 views

Recover the directory structure of a lost LVM Logical volume?

I am aware of the huge amount of data recovery questions on this site, and reading all of them I think my case is unique enough to warrant a new question. how it came to be I set up a LVM with ...
0
votes
0answers
53 views

ubuntu file system memory allocation

While building ubuntu OS image from source how to allocate specific memory to specific folders of filesystem i.e. /home will get xx GB, /sbin will get xxy GB, /bin get yytt GB etc. Is there any ...
0
votes
1answer
73 views

How can I design one Linux file system? [closed]

In an interview, I came across this question. He asked me "Design a linux file system." He asked to give what all things I would need, Data structures and all. Can anyone help me in this that how I ...
0
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2answers
32 views

Help with restoring windows 7 boot from ubuntu grub

I just sold my old laptop on ebay and had Windows 7 and Ubuntu 14.04 installed on separate partitions on the same hd. When I restored factory settings to Windows 7 I deleted the partition that Ubuntu ...
56
votes
8answers
42k views

How to find (and delete) duplicate files

I have a largish music collection and there are some duplicates in there. Is there any way to find duplicate files. At a minimum by doing a hash and seeing if two files have the same hash. Bonus ...
-1
votes
1answer
52 views

how to extend root (/) partition by freeing ext4 partition? [duplicate]

My root (/) partition is full and i want to extend my root file system by freeing extra memory present in other partition which is ext4. How to free some space with ext4 allocation and how to extend ...
0
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0answers
82 views

Cannot create File system on HD

When I run this command: partprobe ; mkfs -t ext4 -q /dev/tbdata/mediashare I get this error: Error: /dev/mapper/tbdata-vmbox: unrecognised disk label Could not stat /dev/tbdata/mediashar --- No ...
0
votes
1answer
26 views

Lost a desktop folder

I am pretty new to Linux and was trying to change the name of a desktop folder from Documents to Media when I got an error message about the pathway. I restarted the computer and lost the folder. I ...
0
votes
0answers
13 views

btrfs is full, but only half a disk is really used [duplicate]

I see this: root@wm-bot:/var/lib# du -ksh /var/lib/mysql/ 2.0G /var/lib/mysql/ root@wm-bot:/var/lib# root@wm-bot:/var/lib# df -h df: `/public/backups': Stale NFS file handle Filesystem ...
0
votes
1answer
16 views

How do you Identify apps or procs that create large tmp files?

I am having problems when using GNS3 on a Win7 host running a VMware Workstation Ubuntu VM. Not sure what app or process is creating large 3+GB temp files filing up my drive. How can tell. Below is ...
1
vote
3answers
6k views

How do I access the file system as a root or owner?

I need to add online store configuration files in file system var/www. but I can't access the file system, because it says that only owner can access it, the owner is root. So, how can I access those ...
-1
votes
1answer
483 views

Low disk Space in Root Filesystem Error

The system gives me the following error: The volume "Filesystem Root" has only 713.9 MB disk space remaining. You can free up disk space by removing unused programs or files, or moving files to ...