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• Locate a user's bashrc file

  - by Starkers

  Really confused. Upon running cat etc/passwd I have found this: postgres:x:117:126:PostgreSQL administrator,,,:/var/lib/postgresql:/bin/bash meaning I have a postgres user, right? I want to change the bashrc environment file of this user to make commands available to it. /var/lib/postgresql doesn't contain a bashrc file, and /bin/bash doesn't contain it either, so I don't really know what's going on. All I know is a created postgres using the useradd command, so why do I have some weird user with no home directory? So confused :(

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• What 2D game engines are there available for C++?

  - by dysoco

  I just realized there are not C++ 2D Game Engines that I know of. For example, something like Pygame in Python, or Slick2D in Java. We have the following: SDL - Too low level, not a Game Engine SFML - Handles more things than SDL and it's more modern, but still not a Game Engine. I like it, but I have found it a little bit buggy with the 2.0 version. Irrlitch - It's a Game Engine, but 3D focused. Ogre3D - Same as Irrlitch Allegro - This is a Game Engine, but it's C based, I'd like a modern C++ library. Monocle Engine - This looks like what I need... but sadly there is no Documentation, no community... nothing, all I have is the Github repo. So, do you know any ? I'd like to use C++, not C#, not Java: I'm just more comfortable with C++.

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• Mint 13 no longer using NVidia card after restart

  - by GenericUsrnme

  Here's the story; I bought a new graphics card, along with other parts, about a week ago. I put them in, install new drivers everything's working fine. Now after a restart I boot into some lovely 1024x768 resolution with only one screen on. I check in the NVidia X Server settings to see if my screen was changed there, there's nothing there except Application profiles and nvidia-settings. I check hardinfo to see if the card is actually recognised; VGA compatible controller: NVIDIA Corporation GK106 [GeForce GTX 660] (rev a1) (prog-if 00 [VGA controller]) I don't really know much about the graphics end of things so I'm not sure what I should be doing here to fix this, I don't even know what I should be looking FOR even, so any help is much appreciated! Thanks in advance

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• Where do I look to investigate how guided partitioning in the Ubuntu Server 12.04 installer works?

  - by Kent

  I would like to know how the installer, and in particular the guided partitioning for Ubuntu Server 12.04 works under the hood. I'm not interested in documentation, I want to check out the real scripts and the logic in them. How do you recommend I dig into this? Where on the ISO are these parts located? I don't know what the installer for Ubuntu is called, or how it is configured. I am well versed in programming languages and command line GNU/Linux.

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• How to save one role implementing a client/server pattern in Azure?

  - by Alfredo Delsors

  Sometimes you need to have an instance performing a server role when other instances are playing the client role. An example can be a file sharing like in this great post: http://blogs.msdn.com/b/mariok/archive/2011/02/11/sharing-folders-in-azure.aspx, one instance shares a folder that all other instances are using to write files that the server processes. The problem is that there is not discovering mechanism in Azure that allows one instance to know where the instance acting as a server is located. A first approach can be having a server role and a client role like in the previous post. This means more instances, more money. A solution to save this "server" role is to use Instance 0, always available, to act as a server. An instance can know that it should act as the server checking RoleEnvironment.CurrentRoleInstance.Id.EndsWith(".0"). Other instances can iterate the RoleEnvironment Instances collection to find the instance whose name ends with ".0", getting its endpoints and acting as its clients.

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• How to reduce the size of a pdf file?

  - by Nicole

  I'm looking for a way in Ubuntu to reduce the size of a pdf (by reducing the quality of the images). I know that this can be done in Ghostscript by typing the following command in terminal: gs -sDEVICE=pdfwrite -dCompatibilityLevel=1.4 -dPDFSETTINGS=/screen -dNOPAUSE -dQUIET -dBATCH -sOutputFile=output.pdf input.pdf The problem is that I can't specify the quality with any accuracy. The parameter -dPDFSETTINGS=/screen is the one that decides the quality; but the alternatives are quite rigid (for example it is possible to do -dPDFSETTINGS=/ebook for slightly better quality). I'm looking for a way to reduce the size of a pdf in a way that allows me to specify the desired quality numerically. I know that this is possible in a Mac, so it must be possible in Linux -- right? Any help would be well appreciated.

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• Can I give my app my own ads? (iOS/Android)

  - by aldo.roman.nurena

  I want to know if I can develop my app on iOS and Android (no matter how, that's another thread) and give them my own ads, not the ones provided by them. This way I make the deals with customers directly. Implementation does not seem to be hard. The hard question is: will I get approved on the stores? It would be a free app with 3rd-party-ads Thanks! PS: I know I can distribute APKs out of the GPlay, but I don't want to do this. PS2: bonus points for WP/BB info, but not critical

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• Ubuntu not appearing in Boot Loader [new]

  - by Bryce

  I installed Ubuntu in a separate partition, along side Windows 8.1. However, Ubuntu/Grub does not appear in the Boot Loader. When I hold shift at startup, the regular Boot Loader (the one before I installed Ubuntu) appears with only Windows 8.1 as a boot option. I already tried the the Boot Repair from a Live USB, but nothing has changed. I have two partitions, one is a journaling file system (mounted on /) and the other is the swap. I read that it may be because Windows doesn't recognize the file system, but I don't know what to do about it. I don't know what I did wrong. Did I mount it in the wrong place? Any help would be appreciated. (If the problem is stupid, I apologize. I'm completely new to installing Ubuntu, and I could not find very detailed instructions.) Edit: In case this has any relevance, safe boot IS disabled.

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• How should I pronounce the :: and -> in PHP?

  - by NickC

  When I read these lines aloud to someone: $controller->process(); UserManager::getInstance(); How should the -> and :: be pronounced? Reading the characters themselves in cumbersome and I don't know of any nicknames for them. Being a developer who is used to C-style syntax, I'd like to say "dot", but I'd like something that is easy to say and people can easily understand. It would also be good to know if there are any pronunciations that have become de-facto standards among teams of developers.

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• Online architecture guide

  - by hunterman

  I am a newbie in gamedev, and I don't know about programmer's problems that can appear during development. So can you advice me some best practice for starting build new online multi-player game backend? I just saw reddraft server, and I think Spring library can also do some of its features. What is big difference? Do I need learn more spring or I have to use servers like reddraft or write these tools myself? I know that I need to learn hard and many - and the question is - what I should to learn now at the beginning? Thanks.

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• Switching hosting from Google Apps to GoDaddy

  - by Sahir M.

  I am in a pickle here. I just bought a hosting service from GoDaddy and I already have a domain registered with Google Apps. So I went into the domain control center from Google Apps and I changed the nameservers to point to GoDaddy's and then I deleted all the A records and also removed the www and main CNAME. Then I created an A record with host "@" which points to the IP address I got from GoDaddy (this is the server address I see under the category Server in the GoDaddy Hosting Control Center). Also, I see that in this domain center, the domain forwarding is set to forward to my address "www.domainsite.com". So right now when I go to my website I see the error "This website is temporarily unavailable, please try again later." Does anyone know how to set this up properly or know what problem I could be having? Thanks!

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• Doing affiliate program with shops who don't have a program already set up

  - by Jacobo Polavieja

  I am developing an online shop which has managed to agree with other shops to a comission per sale. Now, the problem, is these other shops don't have any kind of affiliate system. So my question is, is there any way we could arrange an easy way for this? They don't plan to develop anything as they are small shops, so... my only guess right now is to control on my site how many times the links to them have been clicked to have an estimate of potential clients, but don't know how they can know that user came through my site and purchased something. Thank you very much for your help!

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• How to create email request forms and auto-responder?

  - by mfc

  I'm building a site in css and I'm pretty new to any code or script other than html and css. I'm trying to create a landing page that requires an email from visitors and set up an auto responder to send to that newly submitted email. This would also be a signup for email newsletters. I have some idea how to create the form and have looked into a bit. I don't know how to make it a requirement to get past the landing page and into the actual website or set up the auto-responder. Any help would be much appreciated. Or if someone knows of a source that explains how to do this thing in particular it would be wonderful. I tried lynda.com but everything is so general and I can't seem to find info on exactly how to do this but I know its quite common. Thanks!

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• Disable printing extraneous job info when I print a images

  - by pgrytdal

  As of 10/11/12 I this is still a problem. Peterling, that link you gave me was for Windows. Not Ubuntu. I need to know how to do this in Ubuntu. Whenever I print off an image, before the actual image prints, I get these weird "print job" sheets. (I named them that, because I don't know what else to call them.) They say something like: Media Limits: 0.12 x 0.38 to 8.38 x 10.38 inches Job ID: Officejet-Pro-L7700-64 Driver: hp-officejet_pro_17700.ppd Driver version: Description: HP Officejet Pro L7700 Make and Model: HP Officejet Pro L7700, hpcups 3.12.2 Printer: Officejet-Pro-L7700 Created at: Fri Sep 28 14:12:53 2012 Printed at: Fri Sep 28 14:12:53 2012 How do I fix this so the page doesn't print?

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• How to script a reinstall (apt repo's and installed packages)

  - by Kurtosis

  I need to wipe my hard drive and reinstall Ubuntu. /home is on a separate partition, so I can back that up to a backup drive, then copy it back to the wiped drive, install ubuntu, and point it at the existing /home, no problem. However, I also want to script a reinstall of all my apt repo's and the packages I currently have installed, so I don't have to waste hours doing that manually. Anyone know a good way to do this? PS - At least, I'm pretty sure I have to wipe the drive. Need to install Windows 7, and only have an HP system restore disk that formats the whole drive, and not a legit Windows 7 install disk that lets me install on a single partition. If somebody know a way to trick the system restore disk to install only to a single partition, I'd love to hear it.

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• Quickly Application making it run on startup

  - by unknownone

  I have a PyGtk application that I made using Quickly, and I would like to have it run on startup when installed. How would I go about doing this? I'm not sure if sticking the .desktop file in ~/.config/autostart/ would make it work or not. If that will fix it, I don't know how to add it to that folder since Quickly packages the project for you and has it's own installation script. Is it possible to modify what it does on installation? If possible, I would also like to add the program in the System Settings Personal tab, but I do not know how to do that. Thanks

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• Problem Trying to Install ROOT (by CERN) on Ubuntu 11.04 i386

  - by Jose Luis

  I hope you can help me with this problem I am trying to install root in my computer, but I have a problem and I don't know what to do to solve it I've downloaded the tar file with the root version that I want to install I've extracted the files in the tar file I've run the configure program succesfully, but when I run "make" command I get this result: cp /root/root/core/utils/src/RClStl.cxx core/utils/src/RClStl_tmp.cxx bin/rmkdepend -R -fcore/utils/src/RClStl_tmp.d -Y -w 1000 -- -pipe -m32 -Wall -W -Woverloaded-virtual -fPIC -Iinclude -DR__HAVE_CONFIG -pthread -UR__HAVE_CONFIG -DROOTBUILD -I/root/root/core/utils/src -D__cplusplus -- core/utils/src/RClStl_tmp.cxx g++ -O2 -pipe -m32 -Wall -W -Woverloaded-virtual -fPIC -Iinclude -DR__HAVE_CONFIG -pthread -UR__HAVE_CONFIG -DROOTBUILD -I/root/root/core/utils/src -o core/utils/src/RClStl_tmp.o -c core/utils/src/RClStl_tmp.cxx In file included from core/utils/src/RClStl.h:28:0, from core/utils/src/RClStl_tmp.cxx:16: core/utils/src/Scanner.h:16:27: fatal error: clang/AST/AST.h: No existe el fichero o el directorio compilation terminated. make: * [core/utils/src/RClStl_tmp.o] Error 1 rm core/utils/src/RClStl_tmp.cxx I don´t know what to do Please, help me thank you in advance

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• Change default display of the Ubuntu screen

  - by r15

  Currently I am working on a customize device which has Ubuntu 12.10. Now I have to restructure the screen of that device. I have added sample design of the screen. We are getting this screen when we start the device. How can I achive this. I know for this I have make changes in many configuration files of ubuntu. But I don't know how to start and in which files I have to make changes. So that I need some guidelines for this? and we are using lightdm as display manager. Feel free to ask me any question and sorry for bad english.

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• Learning the basics

  - by Kevin

  I am a Linux server administrator first and foremost... Having said that, I have been asked by a former high school teacher of mine to teach students a bit about programming. Like any Linux administrator, I know my fair share of Python and Bash. The problem is that I know NOTHING about the lower level stuff like "machine code" and compilation. The main purpose of this series is to teach programming, not computer science, so I don't need a graduate degree's level of knowledge for this, they will be learning Python first and foremost. However, I would like to learn enough to at least broach the subject with them, any ideas where I can learn that kind of stuff relatively quickly?

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• Unity-2D ALT F1,F2 custom configuration

  - by LGB

  I have been using Ubuntu since the first public version (I used Debian before). I always have had the policy to change between 8 workspaces with ALT F1...F8. I know this is not a "standard" or so, but I prefer this. It worked well with Unity (Unity-2D, I mean) too, after some configuration. But currently the odd thing happened that after a system restart this is not the case anymore, I am totally lost what could happened. Now ALT F3...F8 works, but not ALT-F1...F2, which just focuses launcher/dash, which is not the thing I want. I know this is the standard meaning of these key combinations (AFAIK) but defining my own key combinations worked before and now it stopped working ... If someone have any idea how to restore my custom configured meaning for ALT F1...F2 too, please share with me. Thanks!

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• Is it possible that Unity would some day switch back to Mutter?

  - by David

  I remembered that the first Unity was indeed built on Mutter, but later ported to Compiz due to poor performance. I also know Canonical practically incorporated Compiz to work closely for future Unity, so this is getting less likely. But Compiz just seems pretty outdated now that GNOME3/GTK3/Mutter is becoming more mainstreamed, and it is known to deliver some performance issue, but on the other hand Mutter seems pretty good and is still steadily developing now, I'm just wondering if anyone related to the project is still testing and evaluating the possibility of Unity on Mutter? Not that you have to tell me now if you're going to do it or not. I just wanna know if anyone is considering it. Thanks.

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• What standard superseded 830-1998?

  - by user1564158

  I have been looking into how to document software projects more formally, and I have learned about IEEE 830-1998: Recommended Practice for Software Requirements Specifications. However, as you can see from that link, it has been superseded. I know that 830-1998, and probably even 830-1993, are probably just fine for use. However, if nothing else, I would like to know what standard has superseded it. In this case it may not matter, but if other standards are superseded for more technical things, I think it would be a good idea to link somewhere what standard superseded another (if it is not another one in the same line (830, in this case)). It is worth mentioning that: The most recent standard when searching for "Software Requirements Specifications" or "Software Requirements" on the IEEE Standards Association website is 830-1993, The 2004 (current) version of SWEBOK references 830-1993 (paragraph 2.5), The document's Wikipedia article doesn't mention that the standard was superseded. TLDR: How do you find what standard superseded another, and which one took 830-1998's place?

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• LL(8) and left-recursion

  - by Peregring-lk

  I want to understand the relation between LL/LR grammars and the left-recursion problem (for any question I know parcially the answer, but I ask them as I don't know nothing, because I am a little confused now, and prefer complete answers) I'm happy with sintetized or short and direct answers (or just links solving it unambiguously): What type of language isn't LL(8) languages? LL(K) and LL(8) have problems with left-recursion? Or only LL(k) parsers? LALR(1) parser have troubles with left or right recursion? What type of troubles? Only in terms of the LL/LALR comparision. What is better, Bison (LALR(1)) or Boost.Spirit (LL(8))? (Let's suppose other features of them are irrelevant in this question) Why GCC use a (hand-made) LL(8) parser? Only for the "handling-error" problem?

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• Tab navigation and double content

  - by Guisasso

  I have a website in which i use tabs to navigate between pages. For example, page a displays A as an active tab and B and C background tabs. If the visitor gets to the website via page B, i also would like to display to page d, but not a and c. Question: I know i can just create index2 for b for example, so when the visitor gets to b from a, i display a,b,c and index1 when visitor gets to b from d for example. Is that a bad practice? I know double content isn't good, but in which other way can i or should i approach this problem? The tab navigation i designed uses < li and id tag do display active tab, defined in the < body tag.

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• Using "prevent execution of method" flags

  - by tpaksu

  First of all I want to point out my concern with some pseudocode (I think you'll understand better) Assume you have a global debug flag, or class variable named "debug", class a : var debug = FALSE and you use it to enable debug methods. There are two types of usage it as I know: first in a method : method a : if debug then call method b; method b : second in the method itself: method a : call method b; method b : if not debug exit And I want to know, is there any File IO or stack pointer wise difference between these two approaches. Which usage is better, safer and why?

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