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• Pull/push student assignment files from computer lab computers (Windows 7)

  - by mkstreet

  I have a computer lab with about 35 PC's all running Windows 7. The students do their work and save it on the D-drive in a particular folder such as a folder with the same name as the computer's name (e.g. LABPC001). I'd like a centralized way to pull all these folders in to the teacher's computer in the lab to check the assignments. It would be best if this didn't involve using an external website (e.g. Dropbox). I would also like to be able to distribute (send) files to the students in these same folders. I've seen software applications that do this but they cost about US$1000 which is far beyond our means. Suggestions for free, or almost free, best ways to set this up?

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• Applications getting killed automatically

  - by nebi

  I am running httperf client on my m/c and after few seconds it is getting killed. dmesg shows: The command is: httperf --hog --client=0/1 --server=39.0.0.2 --port=80 --uri=/50kb --rate=20000 --send-buffer=4096 --recv-buffer=16384 --num-conns=6000000 --num-calls=1 Although I had done this test no. of times but never faced this error any time. From last two days I am observing this. My Ubuntu version is ubuntu 10.04. and httperf version is httperf-0.9.0 [ 2997.180620] Out of memory: kill process 7977 (apache2) score 70532 or a child [ 2997.180632] Killed process 7977 (apache2) [ 2997.184837] Out of memory: kill process 7971 (rsyslogd) score 8702 or a child [ 2997.184844] Killed process 7971 (rsyslogd) [ 2997.188823] Out of memory: kill process 7978 (apache2) score 1354 or a child [ 2997.188829] Killed process 7978 (apache2) [ 2997.192817] Out of memory: kill process 7973 (atd) score 561 or a child [ 2997.192822] Killed process 7973 (atd) [ 2997.196805] Out of memory: kill process 8102 (httperf) score 471 or a child [ 2997.196811] Killed process 8102 (httperf) Output of free command: total used free shared buffers cached Mem: 3862768 163000 3699768 0 2384 13068 -/+ buffers/cache: 147548 3715220 Swap: 3905528 0 3905528

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• Networking conflict - What is the most common default computer name for Windows?

  - by John

  I recently had to change the name of my computer to log onto a public wi-fi spot, because a computer with my name was already logged on. (I asked a guy there what to do after it said there was already a computer named "(omitted)" logged on.) I've never been at a wifi spot you had to log into before. I didn't even notice what the computer's name was before. My question is what are the most common default computer names. I'm curious. How often does this sort of problem happen? (For some reason my previous post was closed as off topic - so now I included the reason I'm asking. If it's still considered off topic (networking conflicts) I'll take it elsewhere, but the other forums I know of (ehow.com, answers.yahoo.com) are full of people that couldn't begin to answer a question like this.) Thanks.

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• Networking conflict - What is the most common default computer name for Windows?

  - by John

  I recently had to change the name of my computer to log onto a public wi-fi spot, because a computer with my name was already logged on. (I asked a guy there what to do after it said there was already a computer named "(omitted)" logged on.) I've never been at a wifi spot you had to log into before. I didn't even notice what the computer's name was before. My question is what are the most common default computer names. I'm curious. How often does this sort of problem happen? (For some reason my previous post was closed as off topic - so now I included the reason I'm asking. If it's still considered off topic (networking conflicts) I'll take it elsewhere, but the other forums I know of (ehow.com, answers.yahoo.com) are full of people that couldn't begin to answer a question like this.) Thanks.

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• Thunderbird: "Could not initialize the application's security component" [closed]

  - by user unknown

  In Thunderbird, on startup, I get the error message: "Could not initialize the application's security component" The message continues to check permissions of the profile, and free disk space. df -h shows, that I have 19G free disk space. find . -not -perm -644 -not -perm -600 -ls shows: No file without rw-permissions for me. Before the error occured, thunderbird worked well. But I changed my main mail-account. I had two, let's call them A and B, and used mainly A, but now I wanted to deaktivate it, and receive and send automatically via the second. I Had problems moving the filters from inbox A to inbox B (missing copy-functionality). In the web, I found (mollazine) hints, to move key3.db, cert8.db and secmode.db out of the way, but it didn't work for me. Another hint was to uninstall Quickcam(?. sic!), but I don't have Quickcam. A third to recreate the profile, but I have subdirectories, filters, addressbook, groups - mails back to the year 2003. I don't want to risk the loss of data. The whole errormessage is: Could not initialize the application's security component. The most likely cause is problems with files in your application's profile directory. Please check that this directory has no read/write restrictions and your hard disk is not full or close to full. It is recommended that you exit the application and fix the problem. If you continue to use this session, you might see incorrect application behaviour when accessing security features. When I open the error-console, it is empty.

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• Problems with connecting to wireless network on windows 7

  - by Naveen

  I have a Dell laptop with Windows 7 (Home premium) 64 bit edition installed on it. I use a Wi-Fi router to browse the net. My problem is, I lose the network connection every 10 minutes or so. The network icon on the system tray shows the refresh icon and the status as "identifying network". The network is fine and works fine with my phone. I saw on the net this may be caused if I have enabled IPv6, so I disabled it but still problem persists. When I look at the event log I see the following entries: "Your computer was not assigned an address from the network (by the DHCP Server) for the Network Card with network address 0xXXXXXXXX. The following error occurred: 0x79. Your computer will continue to try and obtain an address on its own from the network address (DHCP) server." I have also installed VirtualBox(32 bit edition) on the laptop. Does anybody any solution to this?

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• Windows 8 on iSCSI with LIO target: thin provisioning

  - by LubosD

  I have installed Windows 8.1 on an iSCSI target. This target is provided by Linux LIO and is backed by a sparse file. One of the reasons I created such an installation was thin provisioning. In other words, when I free disk space on Windows, LIO should punch holes into the file, thus free storage space on the Linux server as well. I have checked my kernel's sources and the SCSI UNMAP command is really supported for file-backed targets. On the other hand, deleting files on Windows doesn't lower the amount of space taken by the backing file on Linux (checked with du). Actually, the backing file sometimes grows even more. Some sources on Google say Win8 should support UNMAP/DISCARD on iSCSI, but even in Wireshark I only see ordinary read and write commands when files are being deleted. Any way to fix or troubleshoot it?

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• ASUS WL-500gP v2 network between two local machines

  - by Epsiloncool

  I have two windows XP machines in my home networks, connected with ASUS WL-500gp V2 which also used as internet router. Problem is: while I have both computers normally goes to internet (used DHCP, static routes is ON, routing table is empty, operation mode is Home Gateway). I see both computers listed on the Network Neighborhood on 1st computer (wired to router), can enter to my own computer, but can not enter to other. I see only one computer (2nd) on the Network Neighborhood on 2nd computer (connected thru Wi-Fi), can enter to itself, getting error when trying to enter 1st computer address in address line (like \My1stComp). What is the problem? I totally crazy founding problem about 3 months.

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• What can I do in order to inform users of potential errors in my software in order to minimize liability?

  - by phobitor

  I'm an independent software developer that's spent the last few months creating software for viewing and searching map data. The software has some navigation functionality as well (mapping, directions,etc). The eventual goal is to sell it in mobile app markets. I use OpenStreetMap as my data source. I'm concerned about liability for erroneous map data / routing instructions, etc that might result when someone uses the application. There are a lot of stories on the internet where someone gets into an accident or gets stuck or gets lost because of their GPS unit/Google Maps/mapping app... I myself have come across incorrect map data as well in a GPS unit I have in my car. While I try to make my own software as bug free as possible, no software is truly bug free. And moving beyond what I can control, OpenStreetMap data (and street map data in general) is prone to errors as well. What steps can I take to clearly inform the user that results from the software aren't always perfect, and to minimize my liability?

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• How can WiFi access points recognize me?

  - by stephanos

  Due to heavy snowfall I was recently stranded on an airport. Having to do some surfing on my laptop I found an open access point. It offered 30 minutes of free surfing a day. I registered and used up my time. Then I wanted to see if I could use it again - mostly just for the fun of it. I opened a different browser then before and tried to register again. It didn't work. The access point recognized me and told me that I'd have to wait another day to get 30 free minutes again. I reconnected again to force a new IP - still the same. How did it recognize me?

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• How to open-source a project whose git repository has copyrighted media in the history?

  - by phyzome

  I want to release an audio fingerprinting software project under a free license, but the repository contains copyrighted audio files. The test cases also currently use these files. How do I release the code to the public with maximum version history but without violating copyright? Details: The code is versioned under git. We will collapse it all back into one branch before release. There are 400 MB of audio data. Some files are free-licensed music from e.g. Jamendo, others are MP3s from our personal collections. No matter what approach we take, we'll always keep an immutable copy of the original repo, so as not to destroy project history. Main question: How to handle the public release? Expunge all history of the files in question from the git repository and release the altered repo. (v64 pointed out a way to do this.) Alternatively, take a snapshot of the current state of the code and don't even bother having a public history of the pre-release code. Side question: How could we have avoided this dilemma in the first place, given that sometimes private code or media is needed for the early stages of a project?

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• Asus x551c windows 7 Intel HD Graphics driver

  - by user3609459

  I did install Windows 7 64 bit on my ex. Windows 8 pro Asus x551c "Ultrabook". The CD with the drivers isn't useable since its a windows 8 only DVD-Rom. I got the Wi-Fi and other stuff running and already tryed 3 of the Intel-HD Graphic drivers for win7 64Bit i found with google. No one was compatible with my pc. Any suggestions how to get this running? I hate windows 8 and dont want to get forced to use it.

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• EXC_BAD_ACCESS error when box2d joint is destroyed

  - by colilo

  When I destroy the weldJoint in the update method (see below) I get an EXC_BAD_ACCESS error pointing to the line world->DestroyJoint(weldJoint); in the update method below: -(void) update: (ccTime) dt { int32 velocityIterations = 8; int32 positionIterations = 1; // Instruct the world to perform a single step of simulation. It is // generally best to keep the time step and iterations fixed. world->Step(dt, velocityIterations, positionIterations); // using the iterator pos over the set std::set<BodyPair *>::iterator pos; for(pos = bodiesForJoints.begin(); pos != bodiesForJoints.end(); ++pos) { b2WeldJointDef weldJointDef; BodyPair *bodyPair = *pos; b2Body *bodyA = bodyPair->bodyA; b2Body *bodyB = bodyPair->bodyB; weldJointDef.Initialize(bodyA, bodyB, bodyA->GetWorldCenter()); weldJointDef.collideConnected = false; weldJoint = (b2WeldJoint*) world->CreateJoint(&weldJointDef); // Free the structure we allocated earlier. free(bodyPair); // Remove the entry from the set. bodiesForJoints.erase(pos); } for(b2Body *b = world->GetBodyList(); b; b=b->GetNext()) { if (b->GetUserData() != NULL) { CCSprite *mainSprite = (CCSprite*)b->GetUserData(); if (mainSprite.tag == 1) { mainSprite.position = CGPointMake( b->GetPosition().x * PTM_RATIO, b->GetPosition().y * PTM_RATIO); CGPoint mainSpritePosition = mainSprite.position; if (mainSprite.isMoved) { world->DestroyJoint(weldJoint); } } } } } In the HelloWorldLayer.h I set the weldJoint with the assign property. Am I destroying the joint in the wrong way? I would really appreciate any help. Thanks

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• Move 2TB Win7x64 to 640GB HDD

  - by reedacus25

  Basically I just got a new (refurbished) HP H8-1260t to use for Windows Media Center. The shipping drive is a 2TB Hitachi drive, but I have an older and barely used 640GB WD Caviar Blue 7200RPM drive I would like to move my Windows install to. I have about 750GB of data with over 1TB free left on the drive. Having googled my heart and fingers out, I would think that I can shrink my partition down to the size it is full at now with over 1TB free for a second partition where I can move my media files to further shrink my boot partition so that I can fit a system image smaller than 640GB on that WD drive. I want to have a separate drive for Media and TV Recordings from my boot disk. Does this sound like the easiest method for me? Or am I doing this all wrong. Help appreciated.

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• ubuntu precise high hard drive I/O

  - by pavolzetor

  on ubuntu precise, all apps starts slowly, and my hard drive is all time in use. What is the cause? it was never before, even nautilus takes a lot time to load, boot is also slower. top - 18:37:05 up 1:07, 1 user, load average: 2.03, 2.34, 2.25 Tasks: 182 total, 1 running, 180 sleeping, 0 stopped, 1 zombie Cpu(s): 30.2%us, 7.2%sy, 1.4%ni, 53.9%id, 7.1%wa, 0.0%hi, 0.2%si, 0.0%st Mem: 3941576k total, 3522048k used, 419528k free, 50156k buffers Swap: 0k total, 0k used, 0k free, 1827640k cached PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 2508 pk 20 0 1018m 189m 28m S 4 4.9 22:28.04 plugin-containe 1290 root 20 0 82336 16m 1492 S 2 0.4 0:04.41 landscape-clien 1305 root 20 0 97280 22m 5584 S 2 0.6 0:01.57 landscape-manag 4201 pk 20 0 17328 1312 924 R 2 0.0 0:00.02 top 1 root 20 0 24436 2364 1268 S 0 0.1 0:00.68 init 2 root 20 0 0 0 0 S 0 0.0 0:00.00 kthreadd 3 root 20 0 0 0 0 S 0 0.0 0:00.45 ksoftirqd/0 6 root RT 0 0 0 0 S 0 0.0 0:00.00 migration/0 7 root RT 0 0 0 0 S 0 0.0 0:00.02 watchdog/0 8 root RT 0 0 0 0 S 0 0.0 0:00.00 migration/1 10 root 20 0 0 0 0 S 0 0.0 0:00.43 ksoftirqd/1 12 root RT 0 0 0 0 S 0 0.0 0:00.01 watchdog/1 13 root 0 -20 0 0 0 S 0 0.0 0:00.00 cpuset

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• Kvpn on ubuntu 11.10 is stuck on 'Connecting'

  - by xupv5

  I recently installed open-vpn and it's gui, Kvpn, on my ubuntu system but after I load the configuration file and click 'Connect' it just runs through and gets stuck on 'Connecting', never actually getting connected. How do i get around this or what might i be doing wrong? The profile was set up using a .conf file and the network i'm trying to connect to needs only a username and password. I'm on a wi-fi connection, with one network card(also behind a university firewall, i suppose). Any help regarding connecting to a vpn on ubuntu would be much appreciated. Thanks!

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• Vista Startup - Cannot Find the File Specified

  - by Redmastif

  Yesterday I restarted my laptop because my Wi-Fi catcher wasn't working correctly, and when the computer reached the login screen, instead of showing my user account it said "Cannot find the file specified". I rebooted and ran the Startup Repair and Memory Diagnostics but nothing showed up. I also took the battery out for a minute and tried again but still no luck. The weird thing is that I cannot even boot into safe mode, it still shows the same error. I don't remember downloading or opening anything suspicious recently, and I have 3 different cleaners/anti-malware programs as well that I usually run about once a week. I did go into the registry recently but I didn't modify or delete anything as I was only checking to see if I had a certain key in it. I have a Dell laptop running Vista Home Basic SP2. If I have to I can reinstall the OS with the CD or even take it to Best Buy but I'd rather try and fix it first. Thanks.

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• Please help me debug this little C program on dynamic two-dimensional array? [migrated]

  - by azhi

  I am a newbie here. I have written a little C program, which is to create a two-dimensional matrix. Here is the code: #include <stdio.h> #include <stdlib.h> int **CreatMatrix(int m,int n){ int **Matrix; int i; Matrix=(int**)malloc(m*sizeof(int*)); for(i=0;i<m;i++){ Matrix[i]=(int*)malloc(n*sizeof(int)); } return Matrix; } int main(){ int m,n; int **A; printf("Please input the size of the Matrix: "); scanf("%d%d",&m,&n); A=CreatMatrix(m,n); printf("Please input the entries of the Matrix, which should be integers!\n"); int i,j; for(i=0;i<m;i++){ for(j=0;j<n;j++){ scanf("%d",&A[i][j]); } } printf("The Matrix that you input is:\n"); for(i=0;i<m;i++){ for(j=0;j<n;j++){ printf("%3d ",A[i][j]); } printf("\n"); } for(i=0;i<m;i++) free(A[i]); free(A); } I have run it, and it works fine. But I am not sure if it is right? Can anyone help me debug it?

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• Game Development

  - by Sundareswaran Senthilvel

  I'm planning to write a game from scratch (a BIG Game, for commercial purpose). I'm aware that there are certain compute libraries like OpenCL, AMD APP SDK, C++ AMP as well as DirectCompute - both from MS (NOT interested in CUDA) are available in the market. I'm planning to write the game from the scratch, which includes the following engines... 1.Physics Engine 2.AI Engine 3.Main Game Engine (... and if anything is missed). I'm aware that, there are some free physics engine libraries in the market. Not sure about free AI engine libraries. I'm bit confused in choosing between the OpenCL, AMD APP SDK, and C++ AMP libraries (as already mentioned i'm NOT interested in CUDA). I want my game to be published in Windows/Android/Mac OSX. It means it should be a cross-platform game. I will be having "one source code" that i'll compile for various platforms like Windows/Android/Mac OSX, and any others if i missed. Note: Since I'm NOT a Java guy, kindly do NOT suggest me the Java Language. For Graphics language should i use OpenGL or DirectX 11? I have heard that OpenGL runs on a single core, and not sure of DirectX 11. Between OpenGL and DirectX which one should i follow? or else, are there any other graphics language that i need to start with? I want to make use of the parallelism in GPU as well as CPU.

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• How can I install Ubuntu's 10.10 kernel I Ubuntu 12.10?

  - by user103533

  I did use Ubuntu 10.10 for a long time, and now I replaced it with Ubuntu 12.10, every thing works great, but I do have one little problem, which is with my wireless card. On Ubuntu 10.10, it worked PERFECTLY, and it even worked better than in windows 7, so I was very happy with Ubuntu 10.10, but, like I said, after installing 12.10, my wireless card doesn't work any more, so I heard that KERNELS are the reason for that. Are kernels the reason for my wireless not working now? If yes then please teach me how to remove my current kernels and install 10.10 kernels. I went to -Additional Drivers- and i found something very weird i took picture and this is what it look like "apply changes" Button NOT active so i can't install driver :( anyway... my Wireless card is WL-138g v2 (remember on Ubuntu 10.10 it was WORKING 100% normally and FREE i did NOT pay for it driver) so... now what shall i do ? it is saying in picture // Using Non-Free firmware for linux kernel drivers from linux-firmware-nonfree (proprietary) // BTW i did "rfkill list" but NO-thing appear under that command.

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• Vista Home Premium won't connect to network.

  - by Ice

  I deinstalled some software (e.g. some Toolbars for IE and Norton security suite, because the free trial period of 60 days is run out and so i want to switch to microsofts free security essentials). But now i cannot connect to the network again: Neither over LAN nor over WiFi. Neither with standard DHCP ON (sets a 169.254.x.y address) nor with fixed IP-Address. No error during changing the settings. Ping to the Gateway e.g. doesn't work and gives "generall failure". The DHCP-Client sets no IP-Address. There is allways only 'local access' on every network-connection. i ran out of ideas, please help. UPDATE per 2011-03-11: I followed each and every hint but nothing changed. I did a research on microsofts homepage through all the sites belonging to network but nothing helped. What can i do next?

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• Java on 256MB system?

  - by Mike S.

  For a school project, I've registered a free VPS on a hosting provider (pipni.cz). It has 256MB RAM: Mem: 262144k total, 148104k used, 114040k free, 0k buffers It's running on Debian Squeeze. I always get this error when I run a Java program: Error occurred during initialization of VM Could not reserve enough space for object heap Could not create the Java virtual machine. I tried to use Xms, Xmx, Xss with low values and still same result. ulimit -v gives me "unlimited". My application will be pretty simple and I need to use rmiregistry also. Can somebody help?

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• SunSolaris 5.10 + jdk 1.6 howto install on clean machine.

  - by user51176

  Can anyone please tell me step by step for downloading sun solaris (assuming I have a free account) and then installing jdk1.6 on it that should work? like: Download SunSolaris iso from http://.... Download patches? (for free account?) what should I do... if needed at all. Download jdk package 1.6 for sun solaris from http://... Install the jdk using... Now java and javac will work with jdk 1.6 Thanks, I tried a couple of things nothing really worked... thanks

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• Combine WLAN with LAN

  - by fiatux

  I have D-link DSL 2750U wireless router. My PC and notebook are connected to router by Wi-Fi. They can share files or ping each other. I have a network storage unit plugged into router by an ethernet cable. Any of the computers cannot reach that storage unit or ping it. I guess my router isolates LAN network from WLAN network. Is there a way to combine them and get the router treat all devices connected to router in a single network? Thanks.

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• How to redirect a specific url through a proxy for multiple services?

  - by CrystalFire

  I have a website hosted on 000webhost.com for free. I am unable to connect directly to the site because Comcast has blocked a portion of 000webhost's servers for free accounts due to other people hosting malicious content. In order to maintain my website, I cannot use my computer to directly connect to the server. I am wondering if there is a way by which I can specifically forward attempts to access the server through a proxy, transparently. The current system that I am on is Windows, but I also have systems running Mac OSX and Linux, so solutions for any system could be fine. I've found answers which work for http, but I'm looking for a solution which will let me use all the other functions as well, such as ftp and ssh.

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