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• linux system problem

  - by snakec

  very first thanks to u all for Ur support. I'm quite new to Linux .i know how to install software but i don't know 1: how to install library .a or .so files i: how to install tar.gz i use the method like ./configure. make make install but most of the time i got the message nothing to make .in lots of tar.gz there is no installation document no make file no .configure file that make me quite confused how to install them or run them now i got sample source code of cuda i got them in tar.gz form when i extract them i found a folder in folder i found folder like c ,doc,shared etc when i open each folder i found more folder n file like that src, doc common ,lib, in these folder i found source code file header files libraries file make files i don't know how to run this kind of project can the be installed on the system how to run them they don't have .run file or script they don't have configure file can any one explain me how to compile them ,how to run them & how to install them

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• Can you recommend a game server for a facebook board game?

  - by Yekmer Simsek

  I am seeking a game server that will scale well. All commercial and/or free software alternatives are welcome. Game will be a boardgame that is similar to poker. Some technical details are listed below. There will be a table which consists of 4 people, to send them message I need a channel manager. A table will be ready to play for at least 5 minutes. There should be a reliable channel manager. People will wait for some time(i.e.) and if they are not playing they will be kicked by server, so there will be a reliable timed task queue to execute some tasks. It should be quick enough to response and show the changes to all 4 people on that table simultaneously.To achive this server should have a powerfull I/O library. I think to use inmemory to have quick response times, but it comes with scalability problems. And some variables should be thread safe so a variable should be thread safe between multiple nodes. Flash(AS3) and Unity (.Net 2.0 C# mono) client API's should be available for socket connection. PS: I am using Reddwarf server, it lacks of documentation and multiple node.

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• Is there any way to automatically prevent running out of memory?

  - by NoahY

  I am often running out of memory on my VPS ubuntu server. I wish there was a way to simply restart apache2 when it starts running out of memory, as that seems to solve the problem. Or am I just too lazy to fix the problem? I do have limited memory on the server... Okay, more information: I'm running apache2 prefork, here are my memory settings (i've been tweaking them...): StartServers 3 MinSpareServers 1 MaxSpareServers 5 MaxClients 150 MaxRequestsPerChild 1000 The VPS has 1 GB of ram, running ubuntu 11.04 32-bit. As for scripts, I have a wordpress network with 5 blogs, an install of AskBot (a python/django stackexchange clone), and an install of MediaWiki that isn't really used. There is also a homebrewed mp3 script that accesses the getid3 library to display information on lists of podcasts, and it seems to be throwing some php errors, not sure if that's the culprit...

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• Corrupted files, hard drive test?

  - by all-R

  Hi guys, I'm currently on a macbook with a 1TB external hard drive connected trough a USB hub wich is connected on my macbook. The problem is, my disk, wich is partitioned in 2 (one HFS+ and one NTFS) keeps getting corrupted, recently it was my HFS+ partition, I could not repair it using the Apple's Disk utility, but was able to backup my files. Is it synonym that my hard drive is failing? Is it because of my USB hub? I also keep all my iTunes library on my external HD (HFS+ partition), and did a lot of transfer lately, adding files, removing etc. the last time, my partition got corrupted after a lot of deleted items. If anybody has an idea of what to check first, what could cause the problem, I would appreciate it :) Thanks!

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• Problem installing qtbase

  - by teucer

  I am getting the following error when installing "qtbase" package for R: [ 68%] Building CXX object smoke/qt/CMakeFiles/smokeqt.dir/x_1.cpp.o /home/mroot/qtbase/kdebindings-build/smoke/qt/x_1.cpp: In static member function ‘static void __smokeqt::x_QAbstractPrintDialog::x_8(Smoke::StackItem*)’: /home/mroot/qtbase/kdebindings-build/smoke/qt/x_1.cpp:4893: error: cannot allocate an object of abstract type ‘__smokeqt::x_QAbstractPrintDialog’ /home/mroot/qtbase/kdebindings-build/smoke/qt/x_1.cpp:4834: note: because the following virtual functions are pure within ‘__smokeqt::x_QAbstractPrintDialog’: /usr/include/qt4/QtGui/qabstractprintdialog.h:89: note: virtual int QAbstractPrintDialog::exec() /home/mroot/qtbase/kdebindings-build/smoke/qt/x_1.cpp: In constructor ‘__smokeqt::x_QAbstractPrintDialog::x_QAbstractPrintDialog()’: /home/mroot/qtbase/kdebindings-build/smoke/qt/x_1.cpp:4896: error: no matching function for call to ‘QAbstractPrintDialog::QAbstractPrintDialog()’ /usr/include/qt4/QtGui/qabstractprintdialog.h:116: note: candidates are: QAbstractPrintDialog::QAbstractPrintDialog(const QAbstractPrintDialog&) /usr/include/qt4/QtGui/qabstractprintdialog.h:113: note: QAbstractPrintDialog::QAbstractPrintDialog(QAbstractPrintDialogPrivate&, QPrinter*, QWidget*) /usr/include/qt4/QtGui/qabstractprintdialog.h:86: note: QAbstractPrintDialog::QAbstractPrintDialog(QPrinter*, QWidget*) make[3]: *** [smoke/qt/CMakeFiles/smokeqt.dir/x_1.cpp.o] Error 1 make[3]: Leaving directory `/home/mroot/qtbase/kdebindings-build' make[2]: *** [smoke/qt/CMakeFiles/smokeqt.dir/all] Error 2 make[2]: Leaving directory `/home/mroot/qtbase/kdebindings-build' make[1]: *** [all] Error 2 make[1]: Leaving directory `/home/mroot/qtbase/kdebindings-build' make: *** [all] Error 2 ERROR: compilation failed for package ‘qtbase’ * removing ‘/home/mroot/R/i686-pc-linux-gnu-library/2.12/qtbase’ Any ideas?

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• Do there exist programming languages where a variable can truly know its own name?

  - by Job

  In PHP and Python one can iterate over the local variables and, if there is only once choice where the value matches, you could say that you know what the variable's name is, but this does not always work. Machine code does not have variable names. C compiles to assembly and does not have any native reflection capabilities, so it would not know it's name. (Edit: per Anton's answer the pre-processor can know the variable's name). Do there exist programming languages where a variable would know it's name? It gets tricky if you do something like b = a and b does not become a copy of a but a reference to the same place. EDIT: Why in the world would you want this? I can think of one example: error checking that can survive automatic refactoring. Consider this C# snippet: private void CheckEnumStr(string paramName, string paramValue) { if (paramName != "pony" && paramName != "horse") { string exceptionMessage = String.Format( "Unexpected value '{0}' of the parameter named '{1}'.", paramValue, paramName); throw new ArgumentException(exceptionMessage); } } ... CheckEnumStr("a", a); // Var 'a' does not know its name - this will not survive naive auto-refactoring There are other libraries provided by Microsoft and others that allow to check for errors (sorry the names have escaped me). I have seen one library which with the help of closures/lambdas can accomplish error checking that can survive refactoring, but it does not feel idiomatic. This would be one reason why I might want a language where a variable knows its name.

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• Client and Server game update speed

  - by user20686

  I am working on a simple two player networked asteroids game using XNA and the Lidgren networking library. For this set up I have a Lidgren server maintaining what I want to be the true state of the game, and the XNA game is the Lidgren client. The client sends key inputs to the server, and the server process the key inputs against game logic, sending back updates. (This seemed like a better idea then sending local positions to the server.) The client also processes the key inputs on its own, so as to not have any visible lag, and then interpolates between the local position and remote position. Based on what I have been reading this is the correct way to smooth out a networked game. The only thing I don’t get is what value to use as the time deltas. Currently every message the server sends it also sends a delta-time update with it, which is time between the last update. The client then saves this delta time to use for its local position updates, so they can be using roughly the same time deltas to calculate position updates. I know the XNA game update gets called 60 times a second, so I set my server to update the game state at the same speed. This will probably only work as long as the game is working on a fixed time step and will probably cause problems if I want to change that in the future. The server sends updates to clients on another thread, which runs at 10 updates per second to cut down on bandwidth. I do not see noticeable lag in movement and over time if no user input is received the local and remote positions converge on each other as they should. I am also not currently calculating for any latency as I am trying to go one step at a time. So my question is should the XNA client be using its current game time to update the local game state and not being using time deltas sent by the server? If I should be using the clients time delta between updates how do I keep it in-line with how fast the server is updating its game state?

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• Workaround broken sudo?

  - by perreal

  I managed to break sudo by deleting the libc.so.6 sym-link in /lib. I copied the actual file and created a symbolic link with the same name under my home directory by using LD_PRELOAD=/lib/libc-2.11.3.so. At this point, all binaries linking libc are working through preload except sudo. For sudo, I need to write (and don't know why): $ /lib/ld-linux-x86-64.so.2 --library-path . /usr/bin/sudo but this gives me: $ sudo: must be setuid root Checking the permissions: $ ls -l /usr/bin/sudo $ -rwsr-xr-x 2 root root 166120 So the setuid bit is actually set. Question: I need to create a symbolic link named /lib/libc.so.6 through my active ssh connection without using sudo, or, make sudo work somehow. I don't have the root password and I can't connect through ssh anymore. Is there any other way I can get authorization?

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• share code between check and process methods

  - by undu

  My job is to refactor an old library for GIS vector data processing. The main class encapsulates a collection of building outlines, and offers different methods for checking data consistency. Those checking functions have an optional parameter that allows to perform some process. For instance: std::vector<Point> checkIntersections(int process_mode = 0); This method tests if some building outlines are intersecting, and return the intersection points. But if you pass a non null argument, the method will modify the outlines to remove the intersection. I think it's pretty bad (at call site, a reader not familiar with the code base will assume that a method called checkSomething only performs a check and doesn't modifiy data) and I want to change this. I also want to avoid code duplication as check and process methods are mostly similar. So I was thinking to something like this: // a private worker std::vector<Point> workerIntersections(int process_mode = 0) { // it's the equivalent of the current checkIntersections, it may perform // a process depending on process_mode } // public interfaces for check and process std::vector<Point> checkIntersections() /* const */ { workerIntersections(0); } std::vector<Point> processIntersections(int process_mode /*I have different process modes*/) { workerIntersections(process_mode); } But that forces me to break const correctness as workerIntersections is a non-const method. How can I separate check and process, avoiding code duplication and keeping const-correctness?

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• moving in the wrong direction

  - by Will

  Solution: To move a unit forward: forward = Quaternion(0,0,0,1) rotation.normalize() # ocassionally ... pos += ((rotation * forward) * rotation.conjugated()).xyz().normalized() * speed I think the trouble stemmed from how the Euclid math library was doing Quaternion*Vector3 multiplication, although I can't see it. I have a vec3 position, a quaternion for rotation and a speed. I compute the player position like this: rot *= Quaternion().rotate_euler(0.,roll_speed,pitch_speed) rot.normalize() pos += rot.conjugated() * Vector3(0.,0.,-speed) However, printing the pos to console, I can see that I only ever seem to travel on the x-axis. When I draw the scene using the rot quaternion to rotate my camera, it shows a proper orientation. What am I doing wrong? Here's an example: You start off with rotation being an identity quaternion: w=1,x=0,y=0,z=0 You move forward; the code correctly decrements the Z You then pitch right over to face the other way; if you spin only 175deg it'll go in right direction; you have to spin past 180deg. It doesn't matter which direction you spin in, up or down, though Your quaternion can then be something like: w=0.1,x=0.1,y=0,z=0 And moving forward, you actually move backward?! (I am using the euclid Python module, but its the same as every other conjulate) The code can be tried online at http://williame.github.com/ludum_dare_24_evolution/ The only key that adjusts the speed is W and S. The arrow keys only adjust the pitch/roll. At first you can fly ok, but after a bit of weaving around you end up getting sucked towards one of the sides. The code is https://github.com/williame/ludum_dare_24_evolution/blob/cbacf61a7159d2c83a2187af5f2015b2dde28687/tiny1web.py#L102

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• how can i disable safe mode for php on web server?

  - by user1767434

  I am using wkhtmltopdf for making a pdf of a page. My code executes the shell to run a command using this wkhtmltopdf library. Everything works fine in my wamp server but when the code runs on my web-server it does not work and gives the following error: Warning: shell_exec() has been disabled for security reasons in /home/pssptech/public_html/.../cert.php on line 272 I think that the php is running on safe mode on the server that's why the shell execution is disabled. But the main problem is I am unable to find the php.ini file on my remote web-server. Can you tell me where can I find the config file so that I can disable the safe mode? Thanks in advance.

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• Can I compile mutt under cygwin?

  - by openist

  I've been trying to compile mutt under cygwin for a few days. The included version is outdated and does not include things I need like header caching. Anyways, I always get the message: "configure: error: no curses library found" I have all the curses + devel stuff installed + termpcap, which I heard might be related. I've tried re-installing, i've tried specifying the location on the configure command line, but i'm not sure i'm doing it right: "--with-curses=/usr/lib/libncurses.a --with-curses=/usr/lib/libncurses.dll.a --with-curses=/usr/include/ncurses" Here's my config.log: http://floatsolutions.net/docs/config.log Any ideas? EDIT: Context

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• How to handle the fear of future licensing issues of third-party products in software development?

  - by Ian Pugsley

  The company I work for recently purchased some third party libraries from a very well-known, established vendor. There is some fear among management that the possibility exists that our license to use the software could be revoked somehow. The example I'm hearing is of something like a patent issue; i.e. the company we purchased the libraries from could be sued and legally lose the ability to distribute and provide the libraries. The big fear is that we get some sort of notice that we have to cease usage of the libraries entirely, and have some small time period to do so. As a result of this fear, our ability to use these libraries (which the company has spent money on...) is being limited, at the cost of many hours worth of development time. Specifically, we're having to develop lots of the features that the library already incorporates. Should we be limiting ourselves in this way? Is it possible for the perpetual license granted to us by the third party to be revoked in the case of something like a patent issue, and are there any examples of something like this happening? Most importantly, if this is something to legitimately be concerned about, how do people ever go about taking advantage third-party software while preparing for the possibility of losing that capability entirely? P.S. - I understand that this will venture into legal knowledge, and that none of the answers provided can be construed as legal advice in any fashion.

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• How do I run a search query based on recipient in PowerShell for Exchange 2010?

  - by LucidLuniz

  I've tried to run the following commands but neither work and I'm not sure how I should setup the query. I tried to find a full list of available search strings but couldn't locate one online or using help. I did find the list here (http://technet.microsoft.com/en-us/library/bb232132.aspx#AQS) but it doesn't include the search queries I am looking for (based on the fact that it doesn't even list "Received:" which I know is an option because I use it all the time. Search-Mailbox -Identity -SearchQuery 'Received:' 'To:' -LogLevel Full –DeleteContent Search-Mailbox -Identity -SearchQuery 'Received:' 'Recipient:' -LogLevel Full –DeleteContent Thanks in advance!

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• In C++ Good reasons for NOT using symmetrical memory management (i.e. new and delete)

  - by Jim G

  I try to learn C++ and programming in general. Currently I am studying open source with help of UML. Learning is my hobby and great one too. My understanding of memory allocation in C++ is that it should be symmetrical. A class is responsible for its resources. If memory is allocated using new it should be returned using delete in the same class. It is like in a library you, the class, are responsibility for the books you have borrowed and you return them then you are done. This, in my mind, makes sense. It makes memory management more manageable so to speak. So far so good. The problem is that this is not how it works in the real world. In Qt for instance, you create QtObjects with new and then hand over the ownership of the object to Qt. In other words you create QtObjects and Qt destroys them for you. Thus unsymmetrical memory management. Obviously the people behind Qt must have a good reason for doing this. It must be beneficial in some kind of way, My questions is: What is the problem with Bjarne Stroustrups idea about a symmetrical memory management contained within a class? What do you gain by splitting new and delete so you create an object and destroy it in different classes like you do in Qt. Is it common to split new and delete and why in such case, in other projects not involving Qt? Thanks for any help shedding light on this mystery!

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• Linux, PHP, and mysqlnd?

  - by bob-the-destroyer

  Looks like most common distros build their PHP packages without mysqlnd, instead relying on the old libmysql library. Are there any distros that do include the new mysql native driver even as an option in any of their officially supported repositories? If not, is it possible (and if so, how) to rebuild these three (mysql, mysqli, & pdo_mysql) extensions without having to rebuild the entire PHP install? In my case, there are several PHP functions I need that are available only if these Mysql extenstions are built against mysqlnd. So I'd be fine installing a new OS to get these if the OS offers and supports it.

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• Composer support

  - by Tomas Mysik

  Hi all, today we would like to introduce you our Composer support which will be present in NetBeans 7.3. If anyone of you does not know Composer yet, please be informed that: "Composer is a tool for dependency management in PHP. It allows you to declare the dependent libraries your project needs and it will install them in your project for you." So, what support do we have in NetBeans? The first step, as usually, is to open the Composer IDE Options panel: Once it is configured properly, it is time to create composer.json file where we can define dependencies (libraries) of our PHP project: The generated file is opened so we can review it and add any libraries:  Now, you are ready to install, update or validate library dependencies of your PHP project: We hope that you enjoy this initial support and that we will be able to improve it in the next version of NetBeans.    That's all for today, as always, please test it and report all the issues or enhancements you find in NetBeans Bugzilla (component php, subcomponent Composer).

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• Is there a keyboard shortcut to indent a nested bullet point in a table cell the proper way?

  - by ray023

  Open Word and insert a table (1 x 1 will work just fine). Right-click in the table and, in the context menu, select "Bullets" and a bullet image from the bullet library. Type something and press enter. Type something else, but, instead of clicking enter, right-click and select "Increase Indent" Notice something else moves into the proper indentation of a nested bullet: Outside of a Word table, you would simply press tab to get this behavior, but I want a keyboard shortcut (if available) to do this inside the table. This is what I've tried: Ctrl + Tab: Just indents the text, not the bullet Ctrl + T: Same as Ctrl + Tab Ctrl + M: Indents the text and the bullet but does not change the bullet style Can this be done outside the right-click context menu?

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• setreg.exe for Windows 7

  - by victoriah

  I want to use setreg.exe (http://msdn.microsoft.com/en-us/library/aa387700(VS.85).aspx) to disable the certificate revocation check. However, it's based on an older version of .NET than what I have. Microsoft says it's shipped with the older .net SDK, and when I download that, try to install, it says something like 'can't install SDK without .net 1.1'. In the article linked it says for newer versions I should use SignTool, but SignTool does not appear to have the function I need . Is it possible to either - a) find a tool that can perform the function I need that doesn't need me to install the older .NET b) get setreg.exe without downloading the SDK or do I need to install the older .NET on my machine? And if the latter is the case, what do I need to do to install an older .NET? Will it overwrite my current .NET? Thanks,

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• Firefox: show bookmarks location in search result

  - by merv

  I've been a user of firefox for years. Like most, I collected a large number of bookmarks, and over time it now contins lots of folders and nested folders... When I add a new bookmark, I would like to place in specific folder as other related ones. The thing is when I use the search functionality in the Bookmarks Library, it does not say what folder each item is in. And I end up manually looking through all folders (very tedious!) Any suggestion on how to do more efficiently?

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• How to disable the link MissingFile on Shotwell

  - by user86865

  I have some personal photos which are encrypted by CryptKeeper. I doesn't like to disclose them to anyone. Whenever i lke to view them, I mount them using CryptKeeper. I need to include these photos in Shotwell photo manager at the time of mounting. So, I mounted them using CryptKeeper. Then I imported them to Shotwell. I made a new event and etc to organize and view those photos. After that I unmounted them using CryptKeeper because someone may see it. Now I don't want any single trail on Shotwell beacuse of the same problem. But there is a new button 'MissingFiles' appeared and when i clicked on it, all the photo thumbnail which i unmounted showed there. I dont't want right'click on them and select 'remove from library'; beacuse when i want to view them next time on Shotwell, I need to import, organize, etc at that time. So, the only option here is to disable the unavailability of that MisssingFiles button.

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• How much ram to be able to convert large (5-6MB) jpegs? [closed]

  - by cosmicbdog

  I've got a project where we want to be processing large jpegs (5-6MB) with apache and php (using GD library). My understanding is that the server converts the image into a BMP making it quite ram heavy and currently we're unable to do it with our 1gb of memory. Here's the error we get: Fatal error: Allowed memory size of 67108864 bytes exhausted (tried to allocate 17408 bytes) How much ram should we be looking at running with to process images of this size? Edit: As Chris S the purist highlighted below, my post is apparently vague. I am doing the most basic and common manipulation of an image, say turning it from a 4352px x 3264px jpg of 5mb in size, to a 900px x 675px file.

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• PDF to Image Conversion in Java

  - by Geertjan

  In the past, I created a NetBeans plugin for loading images as slides into NetBeans IDE. That means you had to manually create an image from each slide first. So, this time, I took it a step further. You can choose a PDF file, which is then automatically converted to an image for each page, each of which is presented as a node that can be clicked to open the slide in the main window. As you can see, the remaining problem is font rendering. Currently I'm using PDFBox. Any alternatives that render font better? This is the createKeys method of the child factory, ideally it would be replaced by code from some other library that handles font rendering better: @Override protected boolean createKeys(List<ImageObject> list) { mylist = new ArrayList<ImageObject>(); try { if (file != null) { ProgressHandle handle = ProgressHandleFactory.createHandle( "Creating images from " + file.getPath()); handle.start(); PDDocument document = PDDocument.load(file); List<PDPage> pages = document.getDocumentCatalog().getAllPages(); for (int i = 0; i < pages.size(); i++) { PDPage pDPage = pages.get(i); mylist.add(new ImageObject(pDPage.convertToImage(), i)); } handle.finish(); } list.addAll(mylist); } catch (IOException ex) { Exceptions.printStackTrace(ex); } return true; } The import statements from PDFBox are as follows: import org.apache.pdfbox.pdmodel.PDDocument; import org.apache.pdfbox.pdmodel.PDPage;

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• How do I upload large (30MB) files via a web interface?

  - by Dan

  Because I'm stumped... The client needs to be able to upload large images to a library but the upload fails after 5-6MB (over my poor connection). It seems to be timing out as the filesize at fail isn't consistent. The setup is a form which is accepted by PHP. I've googled and played with php.ini and everything is set for big uploads and long timeouts. Platform is a dedicated windows server at GoDaddy. What's going wrong?

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• Cannot dump svn repository

  - by vinga

  I've a problem with my svn repo. I cannot use it, I even cannot dump it. svnadmin verify repo returns Can't set position pointer in file 'svn/db/revs/0/0' When I try to dump repo (no matter what revision range), console output shows: * Dumped revision 0. svnadmin: Final line in revision file missing space I've googled that this may be connected with wrong version apr apache2 library, but I have other repositories which work good, so I thing this isn't the case. Is there any way to save at least some files from my repo? Can svn repo get corrupted so easily (probably after power-cut, however I'm not sure).

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