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Articles indexed in November 2012

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• Git workflow for small teams

  - by janos

  I'm working on a git workflow to implement in a small team. The core ideas in the workflow: there is a shared project master that all team members can write to all development is done exclusively on feature branches feature branches are code reviewed by a team member other than the branch author the feature branch is eventually merged into the shared master and the cycle starts again The article explains the steps in this cycle in detail: https://github.com/janosgyerik/git-workflows-book/blob/small-team-workflow/chapter05.md Does this make sense or am I missing something?

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• Forbidding or controlling "Hidden IT..." Who should write and maintain ad-hoc software applications?

  - by matcauthon

  Bigger companies usually have the problem, that it is not possible to write all programs employees want (to save time and to optimize processes) due to a lack of staff and money. Then hidden programs will be created by some people having (at least some) coding experience (or by cheap students/interns...). Under some circumstances these applications will raise in importance and spread from one user to a whole department. Then there is the critical point: Who will maintain the application, add new features, ...? And this app is critical. It IS needed. But the intern has left the company. No one knows how it works. You only have a bunch of sources and some sort of documentation. Does it make sense to try and control or forbid application development done ad-hoc outside of the IT department (with the exception of minor stuff like Excel macros)?

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• License validation and calling home

  - by VitalyB

  I am developing an application that, when bought, can be activated using a license. Currently I am doing offline validation which is a bit troubling to me. I am aware there is nothing to do against cracks (i.e modified binaries), however, I am thinking to trying to discourage license-key pirating. Here is my current plan: When the user activates the software and after offline validation is successful, it tries to call home and validate the license. If home approves of the license or if home is unreachable, or if the user is offline, the license gets approved. If home is reached and tells the license is invalid, validation fails. Licensed application calls home the same way every time during startup (in background). If license is revoked (i.e pirated license or generated via keygen), the license get deactivated. This should help with piracy of licenses - An invalid license will be disabled and a valid license that was pirated can be revoked (and its legal owner supplied with new license). Pirate-users will be forced to use cracked version which are usually version specific and harder to reach. While it generally sounds good to me, I have some concerns: Users tend to not like home-calling and online validation. Would that kind of validation bother you? Even though in case of offline/failure the application stays licensed? It is clear that the whole scheme can be thwarted by going offline/firewall/etc. I think that the bother to do one of these is great enough to discourage casual license sharing, but I am not sure. As it goes in general with licensing and DRM variations, I am not sure the time I spend on that kind of protection isn't better spent by improving my product. I'd appreciate your input and thoughts. Thanks!

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• Recommendation for a platform to teach game development to kids [closed]

  - by Moshe Kravchik

  My 11 years old son decided he want to create a Web game. He does not know much about programming and I never did any game development so I'm not the best teacher of the topic. On one hand I really want him to get into building things and doing his own game sounds perfect. So I'd like to find a way to keep him interested and progressing by himself. This means that I'm looking for a platform that is: 1. Simple for understanding and use, intuitive interface 2. Powerful 3. Good tools, preferrably free 4. Significant community for questions and tips 5. Localization - my son's English is quite poor (native Hebrew). We looked at Alice, but it was too limited in its abilities and isn't really a Web game building platform. HTML/CSS and Javascript - too low level for a kid to keep the interest. What would you recommend?

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• How do you track bugs in your personal projects?

  - by bedwyr

  I'm trying to decide if I need to reassess my defect-tracking process for my home-grown projects. For the last several years, I really just track defects using TODO tags in the code, and keeping track of them in a specific view (I use Eclipse, which has a decent tagging system). Unfortunately, I'm starting to wonder if this system is unsustainable. The defects I find are typically associated with a snippet of code I'm working on; bugs which are not immediately understood tend to be forgotten, or ignored. I wrote an application for my wife which has had a severe defect for almost 9 months, and I keep forgetting to fix it. What mechanism do you use to track defects in your personal projects? Do you have a specific system, or a process for prioritizing and managing them?

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• Insanity joining Server 12.04 to Windows AD

  - by Andrew Stebenne

  I've seen lots of stuff about this error on the internet, but had no luck implementing a solution. I'm trying to use Likewise-Open to join an Ubuntu Server 12.04 machine to a Windows Active Dicrectory domain controller and having absolutely no luck. I run: sudo domainjoin-cli join my.domain.gob ADMINISTRATOR and get back (after putting in the admin password): Error: DNS_ERROR_BAD_PACKET [code 0x0000251e] A bad packet was recieved from a DNS server. Potentially the requested address does not exist. I have heard that WAD insists on being your only nameserver, and in attempts to make that work, I've tried editing /etc/resolv.conf and /etc/network/interfaces but none of that has worked either. Ideas?

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• WUBI restore using Windows system repair disc?

  - by davidp21747

  Can I use a Windows 7 system restore disc and system image disc (of Windows drive C) to restore WUBI if my computer crashes? I use Deja Dup for backups, and have a CD of the WUBI .iso installation file? I don't want to run Ubuntu in a separate partition because I find it convenient to run Ubuntu as a WUBI because I can use Windows drivers etc. Thanks for any advice. I have looked for an answer, but can't find one that answers this particular question.

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• Postfix and tmpfs for /var/spool

  - by Rob Fisher

  My main disk is an SSD so in order to preserve its lifetime by reducing writes I followed some advice and made /var/spool a ram disk by adding this line to /etc/fstab: tmpfs /var/spool tmpfs defaults,noatime,mode=1777 0 0 Later I configured postfix because I have a RAID array on my system and mdadm wants to send me email if the RAID array fails which sounds like a fine idea. Email sending worked fine until I rebooted, at which point: postfix: fatal: open /etc/postfix-out/main.cf: No such file or directory The fix for this is apparently: mkdir /var/spool/postfix postfix check Then I found I also had to do: mkfifo /var/spool/postfix/public/pickup service postfix restart Now sending emails works fine...until the next reboot. So: what is the most correct way to recreate the contents of /var/spool/postfix automatically at boot time if it does not exist? I am using Ubuntu Server 12.04.

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• Printing takes forever and gives pixelated prints

  - by kelvinsong

  I have a Brother HL-3070CW printer, which has some serious issues. Printing takes an abnormally long time, and if the file has anything more than text in it, it becomes horribly aliased and pixelated. The printer also sometimes complains about running out of memory. This problem has appeared on and off throughout various Ubuntu releases, and can sometimes be worked around by saving a file in Postscript through Evince, and printing the PS file in Evince. I tried to install drivers from the Brother website, but it gives an error "dependency not satisfiable: hl3070cwlpr" Help, I'm wasting a huge amount of paper and ink(not to mention time) reprinting pages over and over again in trial and error.

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• Printer Sharing Issue

  - by Sean Webber

  So I set up my printer on 12.10 to share via SAMBA. Windows 'sees' it, it will install it on windows (I have the printer driver installs but it asks for it in Windows default list.. ?), then I can print a test page to the ubuntu printer from Windows. But If I try to print something in Notepad/Wordpad it says 'Printing' but doesn't add it to the "See whats printing" list. If you do it in Google Chrome, however, it works. Any ideas?

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• Cant boot ubuntu 12.10 from LiveCD

  - by user106316

  I had ubuntu installed for a few weeks now untill it had a kernel update and i canceled the wifi driver because it didnt worked, since then i wasent able to boot into ubuntu. I tryed to boot from livecd but it didnt worked either. I was able to succssecfuly install windows 7 64 bit now and also format my hard drive but i dont like windows and when i tryed to install ubunru again to still didnt worked. Please help me! Thanks :)

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• "Failed to fetch" while updating

  - by Farouk BA

  I'm trying to update from ubuntu 12.10 lately but I keep getting the "Failed to fetch" error. W: Failed to fetch ht tp://security.ubuntu.com/ubuntu/dists/quantal-security/Release Unable to find expected entry 'independent/binary-amd64/Packages' in Release file (Wrong sources.list entry or malformed file) W: Failed to fetch ht tp://archive.ubuntu.com/ubuntu/dists/quantal/Release Unable to find expected entry 'independent/source/Sources' in Release file (Wrong sources.list entry or malformed file) W: Failed to fetch ht tp://archive.ubuntu.com/ubuntu/dists/quantal-updates/Release Unable to find expected entry 'independent/binary-amd64/Packages' in Release file (Wrong sources.list entry or malformed file) W: Failed to fetch ht tp://archive.ubuntu.com/ubuntu/dists/quantal-backports/Release Unable to find expected entry 'independent/binary-amd64/Packages' in Release file (Wrong sources.list entry or malformed file) E: Some index files failed to download. They have been ignored, or old ones used instead. I changed the server and deleted the source lists from /var/lib/apt/lists/ like some answers say but still. This is really annoiying.

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• Second Monitor Unable to Display at any Resolution

  - by Ryan Sharp

  After connecting the second monitor, the only way to get it to work is with 'mirror', which isn't what I want it for. If I select a display resolution for it, I get the following error: requested position/size for CRTC 148 is outside the allowed limit: position=(1908, 0), size=(1024, 768), maximum=(1920, 1920) I'm on 12.04, with AMD HD Radeon 6950, Post-update drivers. I appreciate anybodies help with this. Thanks.

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• Screen rendering problems after upgrading to 12.10

  - by vjrj

  Since upgrading to Ubuntu 12.10 I'm suffering severe rendering issues in unity: Some parts of any application (for instance Firefox, or emacs, etc) are blank, or are not rendered, or are blinking. Some fonts in an application are not correct rendered, maybe only some part (see Eclipse screenshot). There is some shadows in desktop background. It's something that occurs from time to time (it's works great for hours and suddenly start to give this rendering problems). I was trying to find a bug in launchpad but without success. My card (using i915 module): 00:02.0 VGA compatible controller [0300]: Intel Corporation Core Processor Integrated Graphics Controller [8086:0042] (rev 02) I've tried to reset compiz/unity or gnome but does not help. Any tip? Update: A Firefox screenshot of how my profile in Ask Ubuntu looks like now

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• Problem opening .sh file

  - by Lautré

  I'm trying to install Torchlight from the Humble Indie Bundle 6. The installation file is an sh file. When I try to run the sh file I get this output. [ user@pc:~/Desktop$ sudo sh ./Torchlight-2012-09-26.sh [sudo] password for user: Current temporary directory (usually /tmp by default) does not seem to be executable! Please specify an alternative path by using the --target option.] How do make the tmp dir executable or specify an alternate path? I'm running ubuntu 12.10

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• Ubuntu 12.10 won't display properly after kernel upgrade

  - by Daniel

  After updating a system today, Ubuntu's doesn't display correctly. The desktop now looks like this. It was working properly before. I had to use the terminal to run synaptic package manager, so I could view the update history; which is as follows: Commit Log for Wed Nov 7 11:50:36 2012 Upgraded the following packages: linux-image-generic (3.5.0.17.19) to 3.5.0.18.21 Installed the following packages: linux-image-3.5.0-18-generic (3.5.0-18.29) linux-image-extra-3.5.0-18-generic (3.5.0-18.29) Prior to this issue, the last active driver was nvidia-current-updates, version 304.51. I tried using the nvidia-current driver, version 304.51.really.304.43 instead, but the problem persists. I tried running nvidia-settings from terminal, so I could try configuring something, but the application informs that the Nvidia driver is not being used. As the x-swat repository has nothing for Quantal, I desperately used the unstable x-edgers repository & upgraded, but to no avail; so I purged it. The display should normally be full HD, but the only available resolutions now are 1024x768(4:3) and 800x600(4:3). The system is Dell XPS-L702X, with NVIDIA GeForce GT 555M, and 17" screen. How can I fix this problem? Update: I tried using the Nouveau third-party driver & this fixes the issue. However, if you have any idea how to get the Nvidia drivers working properly with the latest kernel, please share; as I've noticed some videos playing very slowly on the system, though I'm not sure exactly why.

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• Bluetooth not finding any devices on 12.10

  - by DeanGrobler

  When I switch on my bluetooth and search for devices my laptop doesn't find any even though there's plenty in the area. Most likely this is because of drivers that are missing. So what I want to know is if there's a way I can view the exact details of what bluetooth device I have built into my laptop so I can start searching for a linux version of the needed driver. Any tips? PS - Running 64bit 12.10

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• From where can I install my nVidia drivers? [closed]

  - by Arthur Wulf White

  Possible Duplicate: How do I install extra drivers? Additional Drivers tool in Ubuntu 12.10? I have read here and here that I should be able to install drivers. So I'm finding the Additional Drivers menu. To install nVidia driver. I started looking for System -> Administration and not finding it. I have an icon that says System Settings and it has any option related to drivers. NOTE: I am using Ubuntu 12.10.

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• NetworkManager not populating resolv.conf

  - by Cerin

  I recently upgraded from 11.10 to 12.04, and now NetworkManager isn't populating /etc/resolv.conf when connecting to wireless networks, when it had been working perfectly in 11.10. I'm not seeing any explicit errors in either the NM UI or in syslog. How do I diagnose what's wrong? Edit: If I try to run resolvconf, I get the error "resolvconf: Error: /etc/resolv.conf isn't a symlink, not doing anything." What should it be a symlink to and/or how do I get NM to populate it? This says the symlink should point to /run/resolvconf/resolv.conf, but that file does not exist on my system.

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• Trouble setting up openVPN/VPN

  - by kkiller23

  I'm having trouble setting up a VPN on my VPS that's running Ubuntu 11.04. I'm been following this guide http://tipupdate.com/how-to-install-openvpn-on-ubuntu-vps/ I'm able to start the VPN, but the command it tell's me to do after I start the VPN doesn't work for me. I've tried it about 5 different way's and i'll show you what i get now. :~# iptables -A FORWARD -m state --state RELATED,ESTABLISHED -j ACCEPT iptables: No chain/target/match by that name. :~# iptables -A FORWARD state --state RELATED,ESTABLISHED -j ACCEPT Bad argument `state' Try `iptables -h' or 'iptables --help' for more information. I just can't get that to work and the VPN doesn't seem to be workign with out it. Can someone help me fix this?

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• Domain appears taken when searched from a different host, but whois says 'No match'

  - by Nanda

  I have recently registered a new .name domain. It is just myfirstname.name, something like nanda.name. My debit card has been billed, but my domain control panel doesn't show any information regarding the new domain. I have raised a ticket with their support and there is no response yet. It's been 3 days. I checked some other registrars and almost all of them say that nanda.name is taken, but when I search whois either from my command line or the numerous whois web services, I get No match as answer each time. What gives? PS : I should add that this registrar's support is known to suck, which, by the time I found, is a bit late.

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• SmS Gateways - How do other sites do it? [closed]

  - by chobo2

  Possible Duplicate: Send and Receive SMS from my Website I would love to have a feature on my site that sends Email reminders and SmS(text messages) to people mobile phones. I been searching around and all I am finding is api's that charge money per SmS message(as low as 1cent per message). However even at 1cent per message that is still too much. The amount of money I am charging per year could be servilely eroded by just the Sms messages along. I could of course charge more money for my service or have an add on for SmS messages but I don't think either would work as most people expect it to be free feature and if they have to pay anything that is because of their carrier charging them not the website. How do other sites do it? I guessing companies like google have their own gateway providers or something like that. But how about smaller sites what do they do? I can't see them paying per sms text message.

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• Can a whitespace regex character be used to perform a javascript injection? [migrated]

  - by webose

  if I want to validate the input of a <textarea>, and want it to contain, for example, only numerical values, but even want to give users the possibility to insert new lines, I can selected wanted characters with a javascript regex that includes even the whitespace characters. /[0-9\s]/ The question is: do a whitecharacter can be used to perform injections, XSS,even if I think this last option is impossible, or any other type of attack ? thanks

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• Website (X)HTML Code Change Detection [closed]

  - by 0pt1m1z3

  I am looking for an enterprise-grade service or a tool that can be used to scan / fingerprint websites and notify when major XHTML code changes are detected. The tool should be able to continuously scan thousands of websites and determine the percentage of HTML code that has been modified since the last run. And then either save the data where it can be easily accessed or send periodic notifications. I know of services like ChangeDetect.com, but they don't do markup only changes and instead focus on everything, including content. We don't really care about presentation content, because a lot of sites we need to cover are updated frequently with content.

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• How to Handle frame rates and synchronizing screen repaints

  - by David Kroukamp

  I would first off say sorry if the title is worded incorrectly. Okay now let me give the scenario I'm creating a 2 player fighting game, An average battle will include a Map (moving/still) and 2 characters (which are rendered by redrawing a varying amount of sprites one after the other). Now at the moment I have a single game loop limiting me to a set number of frames per second (using Java): Timer timer = new Timer(0, new AbstractAction() { @Override public void actionPerformed(ActionEvent e) { long beginTime; //The time when the cycle begun long timeDiff; //The time it took for the cycle to execute int sleepTime; //ms to sleep (< 0 if we're behind) int fps = 1000 / 40; beginTime = System.nanoTime() / 1000000; //execute loop to update check collisions and draw gameLoop(); //Calculate how long did the cycle take timeDiff = System.nanoTime() / 1000000 - beginTime; //Calculate sleep time sleepTime = fps - (int) (timeDiff); if (sleepTime > 0) {//If sleepTime > 0 we're OK ((Timer)e.getSource()).setDelay(sleepTime); } } }); timer.start(); in gameLoop() characters are drawn to the screen ( a character holds an array of images which consists of their current sprites) every gameLoop() call will change the characters current sprite to the next and loop if the end is reached. But as you can imagine if a sprite is only 3 images in length than calling gameLoop() 40 times will cause the characters movement to be drawn 40/3=13 times. This causes a few minor anomilies in the sprited for some charcters So my question is how would I go about delivering a set amount of frames per second in when I have 2 characters on screen with varying amount of sprites?

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