Fedora :: How To Perform Scandisk And Defragmentation Like Operations?

Nov 25, 2010

I have got fedora 13 install on my system. I wanted to know how could I perform scandisk and defragmentation like operations in linux?

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Programming :: Perform Floating Point Operations In Linux Kernel?

Apr 7, 2011

how to perform floating point operations in kernel? i answered that its impossible to perform floating point operations in kernel.but he is telling that its possible but with some feature to be added.can any body know about this perfectly??

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Ubuntu :: Error: Can't Perform Indexing Operations For <unknown Type> Type

Feb 26, 2010

I just loaded octave. I ran through a few examples of how to implement a script file. Everything works until I get to "plot". When I run the "plot" command I get the following.

octave:2> test1.m
error: can't perform indexing operations for <unknown type> type
sh: gnuplot: not found
Just to double check my work, I ran the following code:
y=[1 2 3];

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Software :: Got A Fat32 Extern Hard Drive And Would Like To Do A Defrag And A Scandisk On It With Fsck?

Feb 24, 2010

I got a Fat32 Extern Hard Drive and I would like to do a defrag and a scandisk on it with fsck? Can any one tell me what is the command to do it? I could not find it on google,

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OpenSUSE Install :: How Much Defragmentation Is Enough

Oct 2, 2010

I've installed SuSE 11.2 onto an acer Travelmate 2310 with Windows XP. The laptop started out with three partitions -- one a small hidden acer partition, one ( C: ) the main Windows partition, and one ( D: ) to support a bios-enabled disk-to-disk backup capability. I would be able to shrink both C and D. I ran the defragmentation program four or five times against the C: partition. Each time I ran it, the program left a small moveable file at the very end of the partition. Is this file a deliberate Microsoft ploy to thwart partition shrinking? The Linux install did allow me to shrink D: to about 150 MB.

Shrinking C: was not even an option, however. Is this because the main Windows XP partition is unshrinkable? Is there any way to determine what file resides at the end of the partition? There is one minor problem with the 11.2 install. When I accept the recommended configuration then try to resize, the install program refuses to expand the Linux partitions beyond the recommended size values. I had to delete the recommended Linux partitions and recreate them manually, using expert mode. I haven't seen a bios option for disk-to-disk backup before. What will happen now that D: has shrunk to a point? I doubt that bios has access to the partition table! To be safe, I've turned the option off.

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Ubuntu / Apple :: Defragmentation/Partition Creation In OS X?

Mar 30, 2011

I'm trying to repartition the 60gb hd on my macbook 1,1 so that I can triple boot os x, ubuntu, and windows. When I try to repartition it all at once with diskutil resizeVolume, I get the error: "Resizing encountered error on disk disk0s2 gunton: No space left on device (2"

Everything I've found through google indicates that this means there is not enough contiguous disk space available to resize and create those partitions. I defragmented my harddrive using the online mode with idefrag, unfortunately that didn't work. I also tried boot camp to just do the windows partition first, but it says it that it cannot move system files or something, basically the same error as above.

My thought was whether or not I could either create an os x bootable cd (no dvd-r) and fully defragment it while it's offline, but a du -chs of the necessary directories was well beyond 700mb.

My next thought is the pertinent question: is there a disk defrag tool on the ubuntu live cd? if not, if i downloaded one and placed it on a usb drive, will it mount from the live cd? or is there another way to combat this partitioning problem that i'm unaware of? (i don't have an external harddrive, so i can't timemachine/reformat/restore system).

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Fedora :: Can't Perform Software Update?

Aug 31, 2009

Get message: "database disk image is malformed"

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Fedora Networking :: Perform A VPN Lan To Lan IPSEC Connection?

Jul 21, 2009

I'm trying to perform a VPN lan to lan IPSEC connection. By my side, I have a server with 2 IP's, i.j.k.l (destined to act as a VPN gateway) and i.j.k.m (the server). I am a newbie. I don't know if this configuration is normal, but it's forced by our partner.

My configuration is:

OS: Fedora release 7 (Moonshine)
OpenSWAN version: Linux Openswan U2.4.7/K2.6.23.17-88.fc7 (netkey)
# /etc/ipsec.conf - Openswan IPsec configuration file
# Manual: ipsec.conf.5


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Fedora :: Does SMP Perform At Its Optimum In Intel Core I7?

Sep 19, 2009

This is a general technical question about Symmetric Multiprocessing in relation to the Intel Core i7. (Actually, it's more about Hyperthreading than i7.) My understanding is that Symmetric Multiprocessing means that the operating system treats all processors as identical, and therefore it can assign a new thread to any free processor.

And that i7 appears to the OS as 8 processors, 0 thru 7. But from a performance perspective, the 8 processors are not identical, because each core has 1 execution engine plus the ability to store the state of 2 threads. This is, as far as I understand it, the essence of Intel's Hyperthreading. So each execution engine can quickly switch between 2 threads without bothering the OS, but only one thread at a time actually executes.

Suppose, for example, all processors are idle and the OS assigns one thread to processor 0, then has a second thread to assign. Since all free processors are considered identical, the OS could assign the second thread to any free processor, say 1. The result would be that both threads are competing for the same execution engine, while the other 3 cores remain idle. Is my understanding of SMP correct?

If so, does linux SMP take full advantage of Intel Hyperthreading (which existed also in earlier Intel processors)? That is, does linux SMP assign threads in such a way that it attempts to choose an idle execution engine? I don't know what algorithm SMP actually uses to choose the processor. For example, it could be the first free processor, or any free processor chosen at random.How about Windows? How does it handle the situation?

Edit: I have also posted this question in linuxforums and phoronix forums. I hope this doesn't count as cross-posting, since those forums are not on this site and they have different readership. If it is indeed cross-posting, please let me know and I will avoid doing it in future.

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Fedora Installation :: Perform 256 Check Sum On The MacBook?

Aug 27, 2011

Last night I downloaded the iso for the full DVD install with the intention of installing it from the hard drive. Since my old Fedora Core 2 system is down right now I have the iso on my MacBook.How do I perform the 256 check sum on the MacBook? I tried the shasum -a 256 but I'm not sure it's doing the right thing.

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Fedora :: Bash Scripts To Perform Chores (No Urgency)

Apr 10, 2011

I have a number of bash scripts I wrote to perform chores. Despite that the very first line in all of them is "#!/bin/bash", I have to actually type "bash {scriptname}" to run them. Am I expecting too much and should be happy with this, or what do I need to do to be able to just type the script name to run it? It's no emergency, just makes my brain wonder.

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General :: How To Perform Root Level Commands - Fedora - Live Media

Jul 21, 2011

I need to use Live Media to make changes to a hard disk drive. I tried to sudo to no effect.

Seems like it would be troublesome to authorize root access on Live Media or have sudo allow commands such as pvcreate,lvcreate,vgcreate, especially if the hard disk is not encrypted.

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Software :: Any Good Defragmentation Software For EXT4 Filesystem?

May 10, 2011

Is there any good defragmentation software for EXT4 filesystem? All the posts i have read have made me confused - some says EXT4 does fragment other says it doesn't.I found one software but that one need some kernel patching. Is there any that is less demanding?

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Ubuntu :: File Operations Take 15 To 30 Seconds?

May 16, 2010

Sometimes while using Open Office, trying to open a file the dialog box takes 15 to 30 seconds of spinning balls until it shows me anything. Then changing a directory takes another 15 to 30 seconds. Visual feedback on selections take several seconds, and often I find myself a couple of subdirectories down from where I wanted to go due to caching of unacknowledged clicks.

My system is usually very, very fast, as one would expect from the specs. This problem happened, well, almost all the time with kernel 2.6.32-21-generic, now it just started happening again with 2.6.32-22-generic.During these slowdowns, opening Dolphin reveals the same problem, exceedingly slow response. While this is happening, top shows the system is not busy, and the hard disk light is not flashing. Idle is over 90% and user and sys are basically nothing. The system is basically doing nothing while making me wait.

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Ubuntu :: File Operations Is Buggy?

Sep 3, 2010

Whenever I move files from a USB memory stick or external hard drive or any other such device the file only seems to transfer 99% of the data and often during moving file operations will freeze and an offer of 'force quit' will come up (although file operations will eventually vanish with the 99% of the file being moved).

Can anything be done to rectify problems with file operations?

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General :: Set Operations For Strings In System?

May 11, 2011

Let me know unix commands to implement set operations on strings.

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Programming :: File/directory Operations In C?

May 5, 2010

How do you do things like list directory contents, mov/copy files, make directoriestc. in C?

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General :: Disk Operations Freeze Debian

Jan 28, 2010

I have just installed Debian testing on my new desktop and I am not very happy with performance - when I perform a disk intensive operation, e.g. upgrade packages in the system, everything seems to freeze, e.g. changing tabs in Iceweasel takes 3 seconds. I run the Debian on my 3 year old Thinkpad X60 ultra-portable, and I don't have these issues. (every single parameter of the laptop is much worse than the desktop).

I am using the default packaged kernel and scripts.

I run

hdparm -t /dev/sda1

And I got around 96GB/s, which is expected. What else can I try to make it work better?

rzes:/home/ga# hdparm -i /dev/sda
Model=WDC WD15EARS-00Z5B1, FwRev=80.00A80, SerialNo=WD-WMAVU1362357
Config={ HardSect NotMFM HdSw>15uSec SpinMotCtl Fixed DTR>5Mbs FmtGapReq }


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Ubuntu Security :: HD Operations Lite Flashes Every Second?

Mar 31, 2010

HD operations indicator-lite flashes every second, on all my hd's..? What is the OS doing?.. Is this a security breach?.. Does this mean that my files are being uploaded at about 10K per second..? Or is this just a software checking status every second..? What does what, that engages the hd every second..?

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Ubuntu :: Disk Operations Freeze System

Jun 19, 2010

When I do some copying of files, or any background disk activity with file reading (transcoding a movie, uploading a big file to FTP, virus scanning) all computer becomes so slow, that I hardly can move my mouse, not to mention any productive use. I have SATA HDD, and Intel Quad CPU. I took measures to be sure it is not CPU or memory resource problem. Gentoo, Fedora, Windows don't freese that much on file reading. It is not a filesystem problem, or HDD, cuse I tried exactly this partition with other OSes.

Nice has a minor effect, but is is not enough, and I can't always start Nautilus with another nice level when I want to copy a file. What can I do to lower the priority of disk operations globally, and make apps to share disk thoughtput equally, not the one to occupie the disk until it finishes?

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Ubuntu :: File Operations In Unity Interface?

Jan 3, 2011

i just installed the ubuntu-netbook package to test out unity on my system.. on seems to work fine but how do i copy my files and folders to a usb drive ? wen i open files and folders using unity..it jus opens in a black window.. i cannot right click on any item..i can just open it.. how how do i do my normal file operations using it ?

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Ubuntu Servers :: Using SSD As Cache For Database Operations

Mar 28, 2011

Had anybody ever tried flashcache [URL] under ubuntu? My idea is to increase the throughput of a small server especially for database operations by using an SSD as cache.

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Ubuntu :: GUI Freezes During Right-click Thunar Operations?

Jul 6, 2011

This has been going on for a few days now... when doing anything involving an opened right-click menu in Thunar, there seems to be a chance that the entire desktop will "freeze". I can move the mouse cursor, but cannot interact with any windows. If I use ALT+CTR+F* to switch to a terminal session and switch back to the graphical session, all the windows on the desktop appear blank. The computer appears to be running normally, I just can't interact with the GUI.So far, I've just been shutting down and rebooting when this happens... any ideas on how to go about diagnosing the problem and/or regaining control of the graphical session? I am using compositing and making non-focused windows translucent, but no other actions cause the GUI session to freeze so I don't think it's just a graphical issue.

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General :: Record Operations In Log File From Terminal?

Jul 27, 2011

I would like to document my activity on linux terminal during some operation.I want to have text file which will contain all commands typed and output from those commands in a file.I know how to set this option in Putty but I have some problems in linux terminal.

bash | tee output.log

When I perform above spell, it only records STDOUT to file.on't have there STDIN,STDERRHow to have in this output.log file STDIN,STDOUT,STDERR

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Software :: File Operations Through Block Driver?

Jan 25, 2010

i have written block driver. its got registered succesfully.now i want to perform file opration like opening file reading/writing data into file which is stored into device.fter registration device node is created under /dev/xxx i am not getting, through this node how to open file which is stored in device.from one document i came to know that i have to use filesystem but in that doc how to use filesystem is not explained

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Programming :: Mount/umount Operations In C Program?

Feb 9, 2011

I need to do mount/umount operations in my c program. But my program can only be run under normal user. However, the user who run my program have sudo priviledges to do mount/umount operations. How can i apply the sudo privileges in the mount(2) system call?

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Ubuntu :: Power Operations In The System Menu?

May 7, 2010

Like this neighborhood. I just moved here from Suse. Was living a long time over at slackware but I'm here now.

Q: In suse if you click System in the menus in the top left hand corner all the power operations are there, reboot shutdown etc.

How do I do this on ubuntu - I really really don't like the thingy in the right hand corner...

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Ubuntu :: Graphical Operations (Scrolling / Moving) Slow

Jan 31, 2011

On one Ubuntu desktop 10.04 I got an ati 4800 series using the proprietary drivers. All was working well until a reboot a couple of days ago. I am not sure if it had something to do with one of the massive updates I installed on that day. After that, operations like scrolling, moving windows etc have been dramatically slow. I tried to boot from live cd with 10.04 and everything seemed ok.

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General :: Copying And Moving Operations And Their Performance Differences?

Oct 13, 2010


Well, let's suppose the file is very large, say 10 GB of disk space it is consuming. We perform the above steps. Which operations: cp (copying) or mv (moving) will be more efficient and less time consuming? The inode number 1566966 which was pointing to the file in my home directory is now pointing to the same file which is in some other directry, i.e. /tmp/. Isn't the inode value getting modified in some ways to point to the correct location / beginning of the data block on the hard disk? If the the physical location of the data would not change then we would not be able to free up space in our home directory. That means the mv operation is copying the file into some other location. In other words, it is also performing the cp operation first and then deleting the file from its original location, my home directory in the case above. However, when a file is copied it's inode value changes. But the mv operation is retaining the same indoe value. So, how to determine which operation - mv or cp - is more CPU-friendly or more efficient in terms of performance and time taken to perform the action?

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Ubuntu Servers :: Unable Me To Manage Files And Other Operations From Another Computer?

Jan 11, 2010

I need a tool that will enable me to manage files and other operations from another computer, access to my server. VPS and other host they usually provide cpanel and other webadmin app to do that.

I need advices on the followings:

1. FTP, allow me to access to my folder, like a web host
2. Access to config the server settings
3. Probably a GUI similar to cpanel

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