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• iDeneb OS X Issues

  - by Charlie Somerville

  This afternoon I installed OS X Leopard on my computer through iDeneb. It mostly worked, but I have a few issues. Firstly, it doesn't seem like it's detecting my graphics card properly. I have a Nvidia 8800GT 512mb installed. As you can see in the screenshot below, it's not detecting it and limiting me to a resolution of 1024x768 (which is a pain in the arse to use) Secondly, I don't have any sound. It's not a massive issue like the graphics issue above, but I'd still like to get it rectified. Thirdly, (this is a very small one) my numlock light doesn't seem to be functioning. I don't really care as the numpad still works, but it would be nice to have the numlock light working. Can anyone lend a hand with any of those problems? Thanks. (bump for great justice)

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• Is there any reason to install software as root as opposed to sudo installing software as a sudoer?

  - by Tchalvak

  I'm setting up a new server running Ubuntu Server Edition, and I'm not certain what the difference would be between installing most of the basic software as root, vs installing the basic software as an admin user using sudo apt-get install . For one thing, I'm not sure whether after installing the software as root, I'll need sudo access when running the software as a user (e.g. if I install git as root). On the other hand, if I install software as a user, I could conceive of it not being available to other users that I create in the future. What's the best practice here?

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• Where can I learn various hacking techniques on the web?

  - by Carson Myers

  I would like to try my hand at hacking -- that is, exploiting various website vulnerabilities. Not for any illegal purpose mind you, but so I can have a better understanding and appreciation of these exploits while writing my own web software. I seem to recall that there was a community that hosted a bunch of demo websites, and you had to find and exploit certain vulnerabilities with each one. I can't remember what it is called but this is the sort of thing I am looking for -- I have read a tonne of little XSS and CSRF examples but have yet to find a real-life hands-on example of one. Does anyone know of such a place, where I can be given an example page and look for security holes? I would really rather not try this with actual websites, I don't want to break any laws.

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• Wireless is not currently enabled

  - by ikartik90

  I have a HP Pavilion TX2000 tablet PC with me with windows 7 OS running on it. I used to access the Internet using my D-Link DIR 615 wireless adapter on the tablet and it used to work quite fine until one day, when I hibernated my Windows 7, the wireless went off and the problem seems to persist even after my hard efforts to clear it. I checked if the router works fine, and yes it did as my iPod was still catching wireless signals on the other hand, when I checked mu device manager, I realized that I now had no wireless driver. I checked on HP's website for one, but ironically even they didn't have wireless drivers meant for my tablet for Windows 7. Please help me find a solution to this problem. Further queries will be entertained as frequently as possible. Thanks.

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• How to recover a server from a tar file

  - by Mitch

  In moodle the LMS you can export courses, as a tar.gz, some one said they were going to give me such a thing. I was suprised by the 6 gb size. I was even more suprised when I extracted it, and found the root directory to be the root of the server. The person giving me the course instead of exporting must have just tarred the entire server!! How should I go about recovering this? Is there anyway to start this up in a virtual machine? I have a whole linux server, what to do? I could probably just hand pick the data files I need, but how to access a mysql database with out running mysql? I am so stumped!

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• How can I convert an OpenOffice document to PDF from the Linux command line?

  - by Norman Ramsey

  I have students who, when asked for PDF, sometimes hand me an OpenOffice document or spreadsheet. file(1) can identify these documents, but I've been unable to discover how to convert them to PDF using the command line. (The man page for ooffice(1) lists an option to print a document but not to convert to PDF.) Google is unhelpful, except for giving me the uneasy feeling that this can't be done without a nifty script in a language I don't know against an API whose documentation I can't find. Can anyone help me solve the problem of converting an OpenDocument to PDF using only the Unix command line?

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• Why does the Java VM process eat up more RAM then specified in -Xmx parameter?

  - by evilpenguin

  I have multiple servers running CentOS 5.4 and only one application running on Java VM. I've configured the Java VM with the following arguments: java -Xmx4500M -server -XX:+UseConcMarkSweepGC -XX:+CMSIncrementalMode -XX:NewSize=1024m -Djava.net.preferIPv4Stack=true -Dcom.sun.management.jmxremote=true The machines I'm running the VM on has 6 GB RAM and no other applications running. After a while, the java process starts to hit the swap space really hard, I get this info out of the top command: 7658 root 25 0 11.7g 3.9g 4796 S 39.4 67.3 543:54.17 java On the other hand, if I connect via JConsole, it reports the Java VM has 2.6 GB used, 4.6 GB commited and 4.6 Gb max. java -version returns: java version "1.6.0_17" Java(TM) SE Runtime Environment (build 1.6.0_17-b04) Java HotSpot(TM) 64-Bit Server VM (build 14.3-b01, mixed mode) Why is the Java VM expanding so much past it's allocated heap size? And where does that memory go, if it's not reported in JConsole?

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• DNS Propagation Investigation Techniques?

  - by darkAsPitch

  So I changed the nameservers to veeter.com about 5 days ago now - and the domain is still not resolving over the net. It does intermittently, but then cuts out again every few hours. I run 10+ other domains through the same dedicated server (running CentOS/WHM) and they are all up - so it has nothing to do with that. I have asked my dedicated server support staff what the problem might be, they told me to "log into WHM and click on 'Add a DNS Zone' under the 'DNS Functions' section on the left hand side of the screen. Once you have done this and dns fully propagates it should resolve any intermittent dns issues you may be experiencing." BUT there is already a DNS zone in place for the domain on my server - so what should I do

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• Submitting R jobs using PBS

  - by Tony

  I am submitting a job using qsub that runs parallelized R. My intention is to have R programme running on 4 different cores rather than 8 cores. Here are some of my settings in PBS file: #PBS -l nodes=1:ppn=4 .... time R --no-save < program1.R > program1.log I am issuing the command "ta job_id" and I'm seeing that 4 cores are listed. However, the job occupies a large amount of memory(31944900k used vs 32949628k total). If I were to use 8 cores, the jobs got hang due to memory limitation. top - 21:03:53 up 77 days, 11:54, 0 users, load average: 3.99, 3.75, 3.37 Tasks: 207 total, 5 running, 202 sleeping, 0 stopped, 0 zombie Cpu(s): 30.4%us, 1.6%sy, 0.0%ni, 66.8%id, 0.0%wa, 0.0%hi, 1.2%si, 0.0%st Mem: 32949628k total, 31944900k used, 1004728k free, 269812k buffers Swap: 2097136k total, 8360k used, 2088776k free, 6030856k cached Here is a snapshot when issuing command ta job_id PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 1794 x 25 0 6247m 6.0g 1780 R 99.2 19.1 8:14.37 R 1795 x 25 0 6332m 6.1g 1780 R 99.2 19.4 8:14.37 R 1796 x 25 0 6242m 6.0g 1784 R 99.2 19.1 8:14.37 R 1797 x 25 0 6322m 6.1g 1780 R 99.2 19.4 8:14.33 R 1714 x 18 0 65932 1504 1248 S 0.0 0.0 0:00.00 bash 1761 x 18 0 63840 1244 1052 S 0.0 0.0 0:00.00 20016.hpc 1783 x 18 0 133m 7096 1128 S 0.0 0.0 0:00.00 python 1786 x 18 0 137m 46m 2688 S 0.0 0.1 0:02.06 R How can I prevent other users to use the other 4 cores? I like to mask somehow that my job is using 8 cores with 4 cores idling. Could anyone kindly help me out on this? Can this be solved using pbs? Many Thanks

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• C#: Why am I still getting an RCW error when exiting my application?

  - by shifuimam

  To be specific, the error is: An attempt has been made to free an RCW that is in use. The RCW is in use on the active thread or another thread. Attempting to free an in-use RCW can cause corruption or data loss. The application in question is a small applet that displays the current clock speed of the CPU as a system tray icon. I'm using a System.Timers.Timer object to refresh the systray icon at an interval of 2.5 seconds. There's a single context menu item to exit the application, which uses the following function to unload everything: public void ExitApp(object sender, EventArgs e) { //stop and disable the timer theInterval.Stop(); theInterval.Enabled = false; //unload the system tray icon TheIcon.Visible = false; //exit the application Application.Exit(); } If I take out everything but Application.Exit(); I get an RCW error and the systray icon doesn't go away until I mouse over it. Everything was working perfectly until I changed the window style of the hidden form used to initialize the systray icon and the timer. If it helps any, I'm using C# 2010 Express.

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• Do programmers need a union?

  - by James A. Rosen

  In light of the acrid responses to the intellectual property clause discussed in my previous question, I have to ask: why don't we have a programmers' union? There are many issues we face as employees, and we have very little ability to organize and negotiate. Could we band together with the writers', directors', or musicians' guilds, or are our needs unique? Has anyone ever tried to start one? If so, why did it fail? (Or, alternatively, why have I never heard of it, despite its success?) later: Keith has my idea basically right. I would also imagine the union being involved in many other topics, including: legal liability for others' use/misuse of our work, especially unintended uses evaluating the quality of computer science and software engineering higher education programs -- unlike many other engineering disciplines, we are not required to be certified on receiving our Bachelor's degrees evangelism and outreach -- especially to elementary school students certification -- not doing it, but working with the companies like ISC(2) and others to make certifications meaningful and useful continuing education -- similar to previous conferences -- maintain a go-to list of organizers and other resources our members can use I would see it less so as a traditional trade union, with little emphasis on: pay -- we tend to command fairly good salaries outsourcing and free trade -- most of use tend to be pretty free-market oriented working conditions -- we're the only industry with Aeron chairs being considered anything like "standard"

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• How can I connect a SAS drive to USB? [closed]

  - by dave

  I have a Dell T710 with Seagate Cheetah 15k.7 SAS disks. If the T710 motherboard dies, I'll need to resort to one of my nightly off-site backups and salvage the journal/logfile from the SAS disk to bring the backup bang up-to-date. I need a way of reading the healthy-but-inaccessible SAS disc that does not depend on the only SAS-capable machine I have to hand. So I bought: SAS to SATA Adapter and: USB 2.0 to SATA Adapter with Power ...so that I could read the SAS drive via USB. I can plug it all together just fine. The chain looks like: USB - SATA - SAS. But the drive does not spin up and the computer doesn't even acknowledge anything being attached by USB. Is there a cheap external enclosure I can buy for SAS drives? I can't believe these USB to SATA adapters are everywhere but the USB to SAS adapters are almost non-existent...

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• Optimize Use of Ramdisk for Eclipse Development

  - by Eric J.

  We're developing Java/SpringSource applications with Eclipse on 32-bit Vista machines with 4GB RAM. The OS exposes roughly 3.3GB of RAM due to reservations for hardware etc. in the virtual address space. I came across several Ramdisk drivers that can create a virtual disk from the OS-hidden RAM and am looking for suggestions how best to use the 740MB virtual disk to speed development in our environment. The slowest part of development for us is compiling as well as launching SpringSource dm Server. One option is to configure Vista to swap to the Ramdisk. That works, and noticeably speeds up development in low memory situations. However, the 3.3GB available to the OS is often sufficient and there are many situations where we do not use the swap file(s) much. Another option is to use the Ramdisk as a location for temporary files. Using the Vista mklink command, I created a hard link from where the SpringSource dm Server's work area normally resides to the Ramdisk. That significantly improves server startup times but does nothing for compile times. There are roughly 500MB still free on the Ramdisk when the work directory is fully utilized, so room for plenty more. What other files/directories might be candidates to place on the Ramdisk? Eclipse-related files? (Parts of) the JDK? Is there a free/open source tool for Vista that will show me which files are used most frequently during a period of time to reduce the guesswork?

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• Automatic Remote REGEDIT?

  - by SUPER MARIO BROTHERS

  I've got a lot of computers on the domain here that do not have remote desktop enabled. I can open the command prompt and do this command: REG.exe ADD \\[the machine im doing this to]\HKLM\SYSTEM\CurrentControlSet\ Control\\"Terminal Server" /v fDenyTSConnections /t REG_DWORD /d 0 and it works perfectly fine, except for one thing - it makes a prompt asking if I'm sure I want to do this, Yes/No. How would I go about having a batch file auto-answer YES to this, so I don't have to type it every time? It wouldn't be a problem if it was just a couple hundred machines, but there's plenty more than that and it would take a while to do this by hand. Not to mention I might have to sweep a few times to make sure every computer is turned on and is affected by this.

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• Help! The log file for database 'tempdb' is full. Back up the transaction log for the database to fr

  - by michael.lukatchik

  We're running SQL Server 2000. In our database, we have an "Orders" table with approximately 750,000 rows. We can perform simple SELECT statements on this table. However, when we want to run a query like SELECT TOP 100 * FROM Orders ORDER BY Date_Ordered DESC, we receive the following message: Error: 9002, Severity: 17, State: 6 The log file for database 'tempdb' is full. Back up the transaction log for the database to free up some log space. We have other tables in our database which are similar in size of the amount of records that are in the tables (i.e. 700,000 records). On these tables, we can run any queries we'd like and we never receive a message about 'tempdb being full'. To resolve this, we've backed up our database, shrunk the actual database and also shrunk the database and files in the tempdb system database, but this hasn't resolved the issue. The size of our log file is set to autogrow. We're not sure where to go next. Are there any ideas why we still might be receiving this message? Error: 9002, Severity: 17, State: 6 The log file for database 'tempdb' is full. Back up the transaction log for the database to free up some log space.

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• Back up of Streaming server

  - by Maxwell

  I want to take a new streaming server for my website which generally holds videos and audio files. But how do we maintain backup of the streaming server if storage size is increasing day by day. Generally on Database servers, like Sql Server, backups can be easily taken and restored very easily as they do not occupy much space for medium range applications. On the other hand how can we take backup of streaming server? If the server fails, the there should be an alternative server / solution that should decrease downtime of the server. How is the back-end architecture of YouTube built to handle this?

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• Taskbar Network "Repair" menu option gone in Windows 7

  - by JohnB

  I used to LOVE that feature in Windows XP! Just right-clicked on the WiFi icon on the Taskbar (lower right-hand corner), then Repair. It doesn't take that long, and it usually helped me since I constantly go back and forth between LAN at work, VPN on WiFi from work and home, and also VPN to my own personal server. Even if you didn't need to refresh, doing so never hurts! Unfortunately, the feature seems to be removed from Win7 :( Now you can check for problems, but it only does the refresh if it thinks it needs too, and the whole process tasks so darn long! Is there a way to Repair my WiFi connection quickly and easily on Win7?

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• Incorrect viewport on monitor everytime computer is booted

  - by doldertfo

  Hi, Every time I turn on my PC the viewport isn't aligned correctly on the screen - there is always a black strip on the right hand side. This is not a big issue as it can be resolved by pressing the menu button on the screen and doing a factory reset. However it is irritating having to do it every time. I am using a flat screen monitor with vga connections. The weird thing it never used to happen before with the tower Im using. Is potentially out of date drivers a problem? Thanks.

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• Decrypting Windows XP encrypted files from an old disk

  - by Uri Cohen

  I had an old Windows XP machine with an encrypted directory. When moving to a new Win7 machine I connected the old disk as a slave in the new machine, and hence cannot access the encrypted files. Chances don't seem good as documentation warns you: "Do not Delete or Rename a User's account from which will want to Recover the Encrypted Files. You will not be able to de-crypt the files using the steps outlined above." On the other hand, I have full access to the machine, so maybe there's a utility which can extract the keys and use the to decrypt the files... BTW, I didn't have a password in the old machine, if it's relevant. Ideas, anyone? Thanks!

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• Incorrect viewport on monitor everytime computer is booted

  - by dolderto

  Hello, Every time I turn on my PC the viewport isn't aligned correctly on the screen - there is always a black strip on the right hand side. This is not a big issue as it can be resolved by pressing the menu button on the screen and doing a factory reset. However it is irritating having to do it every time. I am using a flat screen monitor with vga connections. The weird thing it never used to happen before with the tower Im using. Is potentially out of date drivers a problem? Thanks.

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• Gateway NE56R & mouse swipe gesture...how to disable?

  - by Anders

  Can anyone tell me how to shut off the swipe gesture mechanism on my computer? It's driving me crazy. I cannot use a single application without having my computer screen minimize every time I move my hand over the mouse following a mouse-click, pointer movement, etc. Having to maximize my spreadsheets, documents, and applications so much is undercutting my productivity. How some software engineer/inventor imagined that this mouse/gesture swipe gimmick would be helpful to computer users is inconceivable to me. It is a massive annoyance. I've found instructions online for disabling this obnoxious feature, but all the instructions involve messing with my registry, which I don't want to do. I will be SO GRATEFUL to any techie who can tell me how to disable this horrible mouse swipe mechanism without having to alter my registry! I'm using a Gateway NE56R Notebook, Windows 7 operating system, and an Inland USB Mouse (model no. 37535). Thank you in advance!

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• Can Excel sorts be saved and used again?

  - by Robert Kerr

  On an Excel 2007 worksheet, I have several tables, each sharing the same columns. For every table, I sort in several particular ways, depending on the task at hand. It gets tedious going to the Data tab, clicking Sort, unchecking the "my data has headers" checkbox, then add/removing the columns and ordering sort criteria. Is it possible to: * Save a given sort criteria (a named sort)? * Apply the sort against any selected range? * Create a button to execute each saved sort? In the end, I would create 4 or 5 named sorts and a button for each on the worksheet. Then would be able to select any range of rows, from any table, and click one of the sort buttons. The sort would execute.

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• How to make this OO?

  - by John

  Hello, Sorry for the poor title,I'm new to OOP so I don't know what is the term for what I need to do. I have, say, 10 different Objects that inherit one Object.They have different amount and type of class members,but all of them have one property in common - Visible. type TObj1=class(TObject) private a:integer; ...(More members) Visible:Boolean; end; TObj2=class(TObject) private b:String; ...(More members) Visible:Boolean; end; ...(Other 8 objects) For each of them I have a variable. var Obj1:TObj1; Obj2:TObj2; Obj3:TObj3; ....(Other 7 objects) Rule 1: Only one object can be initialized at a time(others have to be freed) to be visible. For this rule I have a global variable var CurrentVisibleObj:TObject; //Because they all inherit TObject Finally there is a procedure that changes visibility. procedure ChangeObjVisibility(newObj:TObject); begin CurrentVisibleObj.Free; //Free the old object CurrentVisibleObj:=newObj; //assign the new object CurrentVisibleObj:= ??? //Create new object CurrentVisibleObj.Visible:=true; //Set visibility to new object end; There is my problem,I don't know how to initialize it,because the derived class is unknown. How do I do this? I simplified the explanation,in the project there are TFrames each having different controls and I have to set visible/not visible the same way(By leaving only one frame initialized). Sorry again for the title,I'm very new to OOP.

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• How to change drag & drop behaviour in Windows 7's explorer?

  - by Pekka

  I have a new touch screen, and am playing around with its functionality. The most productive use for me is organizing files (literally) by hand. It's fun working through a list of files, dragging and dropping them to the right locations using your index finger. It feels better on the wrist than mouse-clicking, too. The only problem is that when I drag & drop files across drives in Windows 7, the default behaviour is to copy the file instead of moving it. I know I can influence this using right click, but that is of course no option in my situation. How can I change the default drag & drop behaviour in Windows 7's explorer?

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• "Work stealing" vs. "Work shrugging"?

  - by John

  Why is it that I can find lots of information on "work stealing" and nothing on "work shrugging" as a dynamic load-balancing strategy? By "work-shrugging" I mean busy processors pushing excessive work towards less loaded neighbours rather than idle processors pulling work from busy neighbours ("work-stealing"). I think the general scalability should be the same for both strategies. However I believe that it is much more efficient for busy processors to wake idle processors if and when there is definitely work for them to do than having idle processors spinning or waking periodically to speculatively poll all neighbours for possible work. Anyway a quick google didn't show up anything under the heading of "Work Shrugging" or similar so any pointers to prior-art and the jargon for this strategy would be welcome. Clarification/Confession In more detail:- By "Work Shrugging" I actually envisage the work submitting processor (which may or may not be the target processor) being responsible for looking around the immediate locality of the preferred target processor (based on data/code locality) to decide if a near neighbour should be given the new work instead because they don't have as much work to do. I am talking about an atomic read of the immediate (typically 2 to 4) neighbours' estimated q length here. I do not think this is any more coupling than implied by the thieves polling & stealing from their neighbours - just much less often - or rather - only when it makes economic sense to do so. (I am assuming "lock-free, almost wait-free" queue structures in both strategies). Thanks.

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