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

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7
votes
4answers
2k views

Drive reporting incorrect free space

So I swapped my shiny SATA SSD for an even shinier PCI-E SSD. I run my core OS on the SSD because it's silly-fast. I did this on my old SSD so I created a new EXT4 partition and then just dded the ...
7
votes
3answers
13k views

Simple way to consistently access a SMB mount?

Is there any simple GUI way to make an SMB share persistent? I don't quite remember the steps, but on Windows, once you've mapped a share to a drive, you're given the option to 'reconnect on boot' (or ...
7
votes
2answers
35k views

filesystem types for partitions [closed]

I am going to dual-boot install Ubuntu1 10.04 on my laptop with Windows 7. I was wondering what filesystem types (such as ext2, ext3, ext4, ReiserFS and whatever might come into mind) are ...
7
votes
1answer
2k views

What is stored in the “/var/lib/dpkg/updates” folder?

I've seen some folks have errors relating to files in /var/lib/dpkg/updates. All I can find about the directory is that the files in it are numbered 0000, 0001 etc. and that the error messages often ...
7
votes
1answer
8k views

How to get rid of unused jfsCommit processes?

On a Dell Poweredge T620 with Xeon hexacore processor, i notice that there are 14 extraneous processes for the jfs filesystem. On another server, there are similar processes for the xfs filesystem as ...
7
votes
2answers
5k views

What is the easiest way to merge / and /home?

I have separate / and /home partitions, of which both use ext4 as their filesystem. How can I merge them, and what is the easiest way?
7
votes
2answers
1k views

Is the copy speed from ext4 to NTFS the same as from NTFS to NTFS?

I've created a file sharing server with Ubuntu server and samba, the drive for sharing is on ext4, but all the users are on windows 7/XP Would the copy speed be faster if the drive would be on NTFS?
7
votes
2answers
2k views

Are pre-existing files in a mountpoint directory safe and uneffected?

I've noticed that pre-existing files in a "mountpoint" directory disappear when the mount command is applied... and then they re-appear when the directory is unmounted. Are these files just on ...
7
votes
3answers
12k views

How well is the HFS+ filesystem supported?

How well does Ubuntu support HFS+ (i.e. Mac formatted) filesystems? Can it read and write to them, and are there any potential problems to watch out for?
7
votes
2answers
7k views

Wammu - USB Device Name?

I'm trying to get to my phone's filesystem through USB in Wammu, but I'm stuck in the configuration wizard when it asks for a USB device name. After about an hour of Internet searching, here are the ...
7
votes
1answer
2k views

How do I make noatime mounts default?

I'm making an Ubuntu derivative, and I want to make noatime the default mount option for all filesystems (instead of relatime which is default in Ubuntu). There seems to be a boolean default_relatime ...
7
votes
2answers
9k views

Why does Ubuntu 13.10 not detect my Win7 partition?

I'm trying to install Ubuntu 13.10 alongside Windows 7 on my DELL INSPIRON 14z 5423 laptop and I'm new to all of this. I'm using the Ubuntu 13.10 64-bit ISO burned onto a CD. The first time I tried ...
6
votes
2answers
1k views

Why there are 2 directories having same content?

cd /proc/$$/root/bin cd /bin After running ls command on both the directory, I found that content of both directories are same (which is nothing but list of commands). Is there any specific reason ...
6
votes
2answers
4k views

Why do I get more free space than ext4 after formatting in XFS?

I've bought a 1TB external hard drive and after formatting the entire drive in ext4 Nautilus says there are 934.3 GB of free space. I've also tested formatting the drive in XFS, and in this case ...
6
votes
3answers
3k views

The best choice of linux file system and software that can be accesed from Windows

I am curently having ubuntu and win 7 dual boot and I want to delete my windows 7 and format all my partitions to use a linux file system. But I want to leave a door open in case I have any problems ...
6
votes
3answers
1k views

How can I find the total size of the contents of my Trash folder?

Is there any way I can find out exactly how much is in my Trash folder? I can see the size column, but if I have a folder in the trash, it shows the number of items in the folder rather than the total ...
6
votes
2answers
2k views

Which book should I buy to learn file system in Ubuntu? [duplicate]

Possible Duplicate: How to understand the Ubuntu file system layout? I am very new to Ubuntu and Linux and looking to learn Ubuntu/Linux. Which book should I buy to learn file system in ...
6
votes
3answers
17k views

Where to install software and executables for all users

By default some applications install into /usr/local/bin, but if I change users will that user be able to access this application? I read somewhere here (another question) that I should use /opt? But ...
6
votes
1answer
325 views

How can Ubuntu update running applications without having to close them while Windows cannot?

Running Ubuntu 12.04 64 Bit edition [ and Loving it :D] I mostly update through Terminal using sudo apt-get update && sudo apt-get upgrade I couldn’t understand this , That, having Firefox ...
6
votes
1answer
3k views

Will 11.04 use other filesystem than ext4?

I heard something of a filesystem change. Is it gonna happen in 11.04?
6
votes
3answers
5k views

Fsck gets mad when the file system is mounted

When I run fsck -fy in a terminal it says something similar to: WARNING!! FILE SYSTEM MOUNTED!! You will cause seviere damages. Why is that? This might be a little off-topic but I ran that ...
6
votes
3answers
773 views

What's the difference between “cd ../” vs. “cd /..”?

What do these two commands mean? cd ../ cd /.. I am ending up in two directories upwards the tree on the first command and in the root directory from the second command. Why does that happen?
6
votes
3answers
4k views

How to speed up rsync/tar of large Maildir?

I have a very large Maildir I am copying to a new machine (over 100BASE-T) with rsync. The progress is slow. VERY SLOW. Like 1 MB/s slow. I think this is because it is a lot of small files that ...
6
votes
2answers
220 views

I can continue playing a video after I Shift-Delete it. Is the disk-space freed when I close player?

I've noticed that I can actually Shift-Delete (ie. doesn't go to Trash) a video which is currently playing, and it still keeps on playing, even though there is no named reference to it in nautilus or ...
6
votes
2answers
6k views

Creating btrfs subvolume like @ or @home

Being intrigued by btrfs I decided to toy around with it in a VM. Installation works great as long as I remember to put /boot on a separate partition and it all seems to work fine. What I would like ...
6
votes
1answer
950 views

Is My Filesystem Corrupt or Something?

OK, so for the past 2 days my Ubuntu Install (10.10) has been acting in a very strange manner. Just after the login process is done, and the desktop is loading everything seems to be fine, it is fast ...
6
votes
2answers
4k views

Why has Ubuntu moved the default mount points?

Why has Ubuntu and many other Linux distributions moved the default mount points from /media to /media/$USER Example I plug in a USB drive and it's name is EXT4-250GB-USB it used to show up in ...
6
votes
2answers
6k views

What is the default character encoding?

I don't myself know how deep this question actually goes (for example, for all I know there could be several, depending on my task). Particularly, I am interested in what kinds of strings are used to ...
6
votes
1answer
799 views

Where on the filesytem could a user find the Unity scope files?

I am wanting to find the Unity scope folder so that I can study how the scopes are set up and programmed. Where on the filesytem could I find the Unity scope files?
6
votes
1answer
2k views

Can a wine app access files outside of the wine drive_c environment?

I am running Avisynth witih avidemux+avsproxy in wine, but the files which AviSynth needs to access via its .avs scripts must be in Windows format (eg. "C:\my\avisynth.avs"). Most of the files I want ...
6
votes
2answers
2k views

Technical differences between ways in which UNIX and Windows “mount” devices

Question from which this arose is here: What does it mean to mount something? Since asking about which is "better" or which "worse" can lead to subjective and argumentative answers, I'd like to know ...
6
votes
2answers
183 views

How can I know which folders are created by which program?

I have /usr/share/gtksourceview-2.0/ and I think it maybe due to Mousepad or Geany or Medit text editors. But how can I know for sure without uninstalling them and reinstalling one-by-one? (I don't ...
6
votes
3answers
2k views

Is it possible to take a snapshot of / (or other) filesystem, like in VirtualBox?

Taking snapshot of root partition will make possible to roll back to previous state. This is very helpful when something went wrong and/or data loss occurs. This feature can be seen in VirtualBox HDD ...
6
votes
2answers
51k views

Mount USB drive with write permissions for everyone or specific user

I know there are similar questions but I get some specific problem I can't overcome. I have: HDD split into two partitions. /dev/sdb1 and /dev/sdb2. sdb1 is NTFS and I don't need it. I need sdb2 ...
6
votes
1answer
7k views

How do I create a file and mount it as a filesystem?

How do I create a file of size 10M, format it with ext3 filesystem and then mount it in /media/fuse? I tried with mkfs -t ext3 file then to mount it mount -t ext3 file /media/fuse It didn't ...
6
votes
2answers
2k views

What differences do I need to know choosing between ext4 and NTFS (Performance etc)

I understand that ext4 if faster than NTFS. But whats the speed difference if its like < 20MB/s, perhaps its better to use NTFS for convinence? What are the other implications of this apart from ...
6
votes
2answers
3k views

Can I configure low disk space warning to a lesser threshold?

Ubuntu warns me about low disk space even when there are about 2 GiBs free. For me "low disk space" is 50 MiB or less as I use to use my disks at 100% capacity. The warning could be useful for me if ...
6
votes
2answers
693 views

Tell the kernel to strongly cache a particular directory

This question is a rephrasing of Optimizing EXT4 performance. I have a directory that contains build files, most very small, but totaling 5.6G. I usually access the same subset of files (some ...
6
votes
2answers
631 views

How can I create a filesystem “view” of a folder that excludes certain files?

I want to have a path in the filesystem that shows the entire contents of some other path, excluding a few certain files of my choosing. For example, if the following already exists, original-path ...
6
votes
2answers
3k views

Can I override an SD card's write-protect switch?

The write-protect switch on an SD card doesn't connect to any internal electronics, so it must just be respected by the software controlling the card reader. Is there any way for me to override this ...
6
votes
3answers
968 views

Symlinks and their paths are confusing - how can they be used effectively?

When exploring directories from a symlink (symbolic link) using Nautilus or Gnome Commander, the directory structure is displayed as if the symlink were a regular directory. When I open a document, ...
6
votes
2answers
4k views

Installing Ubuntu 14.04 on a F2FS partition

How can I install Ubuntu 14.04 on a F2FS partition? I created the partition with Gparted but during the installation the Ubuntu installer could not recognize the filesystem on the partition. I heard ...
6
votes
1answer
3k views

What is a safe ulimit ceiling?

This is the output of ulimit -a core file size (blocks, -c) 0 data seg size (kbytes, -d) unlimited scheduling priority (-e) 0 file size (blocks, -f) ...
6
votes
1answer
3k views

System displays “File system maintenance error, press ctrl+d” while booting

In my office I've Ubuntu 8.10 desktop installed and it's running for a long time. When ever the system is started, I'll get a file system maintenance error and something it's prompted for the root ...
6
votes
3answers
875 views

How to get a larger root partition on Touch

I'm trying to make Touch (14.10) work as an Ubuntu server. However the root partition is only 2 GB and is insufficient for the packages I need to install. Is there any way to get more space on the ...
6
votes
3answers
1k views

1TB SATA HDrive on Marvell Adapter disappears after 10.10 upgrade - Why?

Thanks for taking the time. I have a problem I've never had after an upgrade. One of my hard drive, a 1TB NTFS drive connected with the marvell SATA connector (88sx or smth like that ) to my Asus ...
6
votes
1answer
134 views

Resized VirtualBox VM disk, but when partitioning can't use all new available space

yesterday I've resized a VM Virtual disk from about 15 GB to about 26 GB. If I run fdisk I can check that disk is resized: Disk /dev/sda: 26.2 GB, 26214400000 bytes 255 testine, 63 settori/tracce, ...
6
votes
0answers
425 views

Disable filesystem read cache

How can I disable the Linux file system read cache for Ubuntu 12.04? I don't want to only free the actual cache. echo 3 > /proc/sys/vm/drop_caches but disable the read cache completely.
6
votes
1answer
915 views

File operations freeze when putting files larger than 10MB on an SD card [closed]

I have the newest Ubuntu 13 with all updates. When copying files to my 32GB SD card, the file operations freeze just before it finishes. It does not complete. Files greater than 10MB do this. ...
5
votes
4answers
920 views

Ubuntu won't allow to use “/” symbol

I'm trying to rename directory and I need to use "/" symbol but ubuntu won't allow it. Is where any way to "cheat" ubuntu into allowing me to use it?