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• What are the processes of true Quality assurance?

  - by user970696

  Having read that Quality Assurance (QA) is focused on processes (while Quality Control (QC) is focused on the product), the books often mentions QA is the verification process - doing peer reviews, inspections etc. I still tend to think these are also QC as they check intermediate products. Elsewhere I have read that QA activity is e.g. choosing the right bugtracker. That sounds better to me in terms of process improvement. The question that close-voting person obviously missed is pretty clear: What are the activities that true QA should perform? I would appreciate the reference as I work on my thesis dealing with all these discrepancies and inconsistencies in the software quality world.

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• No Wireless In Ubuntu 13.10 (maybe Need Wireless Driver) [duplicate]

  - by viktorhubinette

  This question already has an answer here: No Wireless In Ubuntu 13.10 2 answers hi after updating to ubuntu 13.10 i cant see the wireless networks on the network meny so what should i do ? tell me some commands you need to see to solve the problem. Thanks (i maybe need a wireless driver becouse i installed one when i haved 12.04 becouse i could not connect to wireless before too) i cant connect to wireless that my problem so what do i need to do to get this wireless working again? some outputs lsmod | grep rt1 nothing sudo modprobe rt18192cu FATAL: Module rt18192cu not found. iwconfig eth0 no wireless extensions. lo no wireless extensions. sudo iwlist wlan0 scan wlan0 Interface doesn't support scanning. rfkill list all nothing

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• Performance triage

  - by Dave

  Folks often ask me how to approach a suspected performance issue. My personal strategy is informed by the fact that I work on concurrency issues. (When you have a hammer everything looks like a nail, but I'll try to keep this general). A good starting point is to ask yourself if the observed performance matches your expectations. Expectations might be derived from known system performance limits, prototypes, and other software or environments that are comparable to your particular system-under-test. Some simple comparisons and microbenchmarks can be useful at this stage. It's also useful to write some very simple programs to validate some of the reported or expected system limits. Can that disk controller really tolerate and sustain 500 reads per second? To reduce the number of confounding factors it's better to try to answer that question with a very simple targeted program. And finally, nothing beats having familiarity with the technologies that underlying your particular layer. On the topic of confounding factors, as our technology stacks become deeper and less transparent, we often find our own technology working against us in some unexpected way to choke performance rather than simply running into some fundamental system limit. A good example is the warm-up time needed by just-in-time compilers in Java Virtual Machines. I won't delve too far into that particular hole except to say that it's rare to find good benchmarks and methodology for java code. Another example is power management on x86. Power management is great, but it can take a while for the CPUs to throttle up from low(er) frequencies to full throttle. And while I love "turbo" mode, it makes benchmarking applications with multiple threads a chore as you have to remember to turn it off and then back on otherwise short single-threaded runs may look abnormally fast compared to runs with higher thread counts. In general for performance characterization I disable turbo mode and fix the power governor at "performance" state. Another source of complexity is the scheduler, which I've discussed in prior blog entries. Lets say I have a running application and I want to better understand its behavior and performance. We'll presume it's warmed up, is under load, and is an execution mode representative of what we think the norm would be. It should be in steady-state, if a steady-state mode even exists. On Solaris the very first thing I'll do is take a set of "pstack" samples. Pstack briefly stops the process and walks each of the stacks, reporting symbolic information (if available) for each frame. For Java, pstack has been augmented to understand java frames, and even report inlining. A few pstack samples can provide powerful insight into what's actually going on inside the program. You'll be able to see calling patterns, which threads are blocked on what system calls or synchronization constructs, memory allocation, etc. If your code is CPU-bound then you'll get a good sense where the cycles are being spent. (I should caution that normal C/C++ inlining can diffuse an otherwise "hot" method into other methods. This is a rare instance where pstack sampling might not immediately point to the key problem). At this point you'll need to reconcile what you're seeing with pstack and your mental model of what you think the program should be doing. They're often rather different. And generally if there's a key performance issue, you'll spot it with a moderate number of samples. I'll also use OS-level observability tools to lock for the existence of bottlenecks where threads contend for locks; other situations where threads are blocked; and the distribution of threads over the system. On Solaris some good tools are mpstat and too a lesser degree, vmstat. Try running "mpstat -a 5" in one window while the application program runs concurrently. One key measure is the voluntary context switch rate "vctx" or "csw" which reflects threads descheduling themselves. It's also good to look at the user; system; and idle CPU percentages. This can give a broad but useful understanding if your threads are mostly parked or mostly running. For instance if your program makes heavy use of malloc/free, then it might be the case you're contending on the central malloc lock in the default allocator. In that case you'd see malloc calling lock in the stack traces, observe a high csw/vctx rate as threads block for the malloc lock, and your "usr" time would be less than expected. Solaris dtrace is a wonderful and invaluable performance tool as well, but in a sense you have to frame and articulate a meaningful and specific question to get a useful answer, so I tend not to use it for first-order screening of problems. It's also most effective for OS and software-level performance issues as opposed to HW-level issues. For that reason I recommend mpstat & pstack as my the 1st step in performance triage. If some other OS-level issue is evident then it's good to switch to dtrace to drill more deeply into the problem. Only after I've ruled out OS-level issues do I switch to using hardware performance counters to look for architectural impediments.

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• I cannot see the drives on my computer

  - by Joseph

  I'm a new Ubuntu user and I installed this Ubuntu 12.04 fromn a usb stick. It all went fine(I think) but as I notice, there are no drives shown on the menu. I tried some command in the terminal to see if the drives are available and yes, they are available. My problem is how to make these drives show up on the menu above. Sorry if this question is somewhat vague. (I removed the image because I am not allowed to add an image because I have insufficient reputation)

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• What the best way to wire up Entity Framework database context (model) to ViewModel in MVVM WPF?

  - by hal9k2

  As in the question above: What the best way to wire up Entity Framework database model (context) to viewModel in MVVM (WPF)? I am learning MVVM pattern in WPF, alot of examples shows how to implement model to viewModel, but models in that examples are just simple classes, I want to use MVVM together with entity framework model (base first approach). Whats the best way to wire model to viewModel. Thanks for answers. //ctor of ViewModel public ViewModel() { db = new PackageShipmentDBEntities(); // Entity Framework generated class ListaZBazy = new ObservableCollection<Pack>(db.Packs.Where(w => w.IsSent == false)); } This is my usual ctor of ViewModel, think there is a better way, I was reading about repository pattern, not sure if I can adapt this to WPF MVVM

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• Is it possible to remove a particular host key from SSH's known_hosts file?

  - by Kaustubh P

  I usually end up deleting the entire known_hosts file, which I have no problems for. But just out of curiosity, Is it possible to remove just a single entry? I opened the known_hosts file, and other han understanding that the file contains fingerprints for a given machine, I dont understand anything. Below is the message I faced, which led me to ask this question. Add correct host key in /home/wissen16/.ssh/known_hosts to get rid of this message. Offending key in /home/wissen16/.ssh/known_hosts:1 RSA host key for foo.com has changed and you have requested strict checking. Host key verification failed. Thanks.

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• Exchange with Evolution or any other mail client

  - by Oscar Godson

  I see other questions about this, no answers and no one with a completely similar question. I work for a place with an Exchange 2007 server. There is an http://owa.ourserver.com that is accessible from anywhere. I've tried every combo I can think of for Evolution - Microsoft Exchange, including the MAPI plugin, but then I read that, that doesn't work on OWA Exchange email servers and I can't get it to connect at all that way. If there is no way to connect via Evolution, is there another mail client? I tried Thunderbird, but I couldn't get it to work with Exchange either...

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• Android frame by frame PNG animation

  - by Trick

  I am new at Android game development. I have done some apps before, but none of them are games :) So, I wanted to do a frame-by-frame animation of PNGs. I tried with AnimationDrawable, but OutOfMemory error comes quickly (I have a lot of PNGs). So I came upon SurfaceView. But I am stuck, because I really don't find any useful tutoirals/examples. What is the best way to make an animation like this? Here there already is a great answer to almost the same question, but all the links there don't work anymore. I would really like to here suggestions how to make an animation frame-by-frame with PNGs in Android and if you have any tutorials or examples, I will be really happy :)

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• Best accounting software for freelance/contractor programmer? [closed]

  - by user1352034

  I know this isn't exactly a programming question but I am hoping to find some programmers who freelance or do contractor work in the US. I have started to work on side jobs and have been billing my clients using Paypal. I then would store those records in a Google excel doc but realize this will get out of hand as time goes on and am looking for a good solution. I am no accountant so I am not sure of everything I would need but I am guessing basic invoicing, expenses, reporting, integration with paypal, etc.. Any contractors or freelancers in here could recommend what they use? I have researched a few but would like to hear what other people are using and how it is working out for them. Thanks for your time!

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• How do I X forward a Windows application to a Linux system using ssh?

  - by triunenature

  Ok, so if I have two Linux Machines (A and B) and I have a program on one, and want to run it on be I do: user@LinuxA:~$ ssh -X LinuxB user@LinuxB:~$ programName (Displays on LinuxA machine) Ok same thing, WindowsA LinuxB (Program on Linux) Start Xming X Server on Windows Run Putty, use x11 port forward with :0.0 After connect to LinuxB, run program, it loads in Windows! Now here is the question, WindowsA LinuxB, (Program on Windows) Run Windows Program On Linux, using a windows resources. How to make it work? BTW, I know it can because years ago, I read a white paper on it, but never actually tested it out.

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• Collision detection in multiplayer games

  - by Bane

  This a followup to my previous question: How to implement physics and AoE spells in an MMO game?. There, we concluded that all physics have to be done on the server, and that I should use cylinders for calculations. Now, how can I check for collision detection on a ground-to-player basis on the server? It's fairly easy if the ground is a flat space, I just check if the player's z coordinate is lower than some value and voila, but, what if the map/ground itself is a model? How do I know where hills are on the server-side? How do I know when object collisions happen? I'm using node.js and socket.io.

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• HTTP 303 redirection and robots.txt

  - by Ian Dickinson

  On a site I'm working on, we're using the HTTP 303 redirect pattern (see this article for background) to distinguish between information and non-information resources. So: some URL's under /id get redirected to dynamically-created pages under /doc. These dynamic pages are built from a database, and contain links to other /doc/ resources, so in general we don't want them to be crawled. Our robots.txt contains: Disallow: /doc However, we do want the non-redirected pages under /id to get indexed by Google et al: Allow: /id So the question I have, which I can't find an answer to so far, is: if an allowed /id page 303-redirects to a /doc page, will it still be blocked by robots.txt? If yes, we're OK, but otherwise I'm going to disallow all /id resources in the robots file, as having the crawler hammer the db would be worse than losing search indexing for the /id pages.

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• multi-clients web application,should I use custom user controls or a common user control

  - by ValidfroM

  Say my company is going to build a complicated asp.net web form education system. One of the module is web based registration. To make it flexiable, we decide to use user control(ascx) with rule-engine (work flow) regulating all business logic behide them. Thus in future,for different clients, we can simply config basic existing rules or adding new rules.(Rules stored in db or XML per client). Now the question is how to deal with the user controls (ascx)? My opinion is for different client build diffrent user control from scratch. other voice is like reuse existing user controls.

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• FAQ: Creating a new LDOM domain

  - by Owen Allen

  I got a question about creating LDOM domains: "I have a Server Pool set up, and I need to create a secondary LDom domain on a machine in the pool. When I click on the machine, though, the 'create logical domain' command is grayed out. The machine still has available CPU threads and free RAM. What's going on?" This one has an easy answer. In a Server Pool, the Create Logical Domain action is under the pool's actions, rather than the individual machine's actions. This is because the Server Pool decides where to put the new domain based on the Server Pool's placement policy. So, in this case, you need to select the Server Pool in the Assets section, and then create the new domain from there.

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• Running a compiled Java program

  - by Roshan George

  I have a question on a compiled Java program that I have written. I have a Java file that has three classes defined within it. When I compiled the program I got a total of four classes. How do I make this into a form where I can run my application just by clicking an icon or something, or by issuing just a single command. For example, if I make it as an exe file, it could run only on Windows, how do I make it into a form compatible with all Oses. And hoe?

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• Use hotplug and turn on/off PCI device for replacing NIC

  - by Ryota Hashimoto

  How can I turn off the PCI slots and change the device (especially NIC) without shutting the server down? I found a similar question (How do I turn off PCI devices?) but there are no /sys/bus/pci/slot and no files in /sys/bus/pci/slots. I'm using 12.04 LTS. $ uname -a Linux d1-c1-r1-p1 3.2.0-38-generic #61-Ubuntu SMP Tue Feb 19 12:18:21 UTC 2013 x86_64 x86_64 x86_64 GNU/Linux $ lspci | grep Eth 04:00.0 Ethernet controller: Intel Corporation I350 Gigabit Network Connection (rev 01) 04:00.1 Ethernet controller: Intel Corporation I350 Gigabit Network Connection (rev 01) 09:00.0 Ethernet controller: Intel Corporation 82599EB 10-Gigabit SFI/SFP+ Network Connection (rev 01) 09:00.1 Ethernet controller: Intel Corporation 82599EB 10-Gigabit SFI/SFP+ Network Connection (rev 01) $ ls /sys/bus/pci/ devices/ drivers_probe slots/ drivers/ rescan uevent drivers_autoprobe resource_alignment $ ls /sys/bus/pci/devices/0000\:04\:00.0/ broken_parity_status driver modalias rescan subsystem class enable msi_bus reset subsystem_device config firmware_node net resource subsystem_vendor consistent_dma_mask_bits irq numa_node resource0 uevent device local_cpulist power resource2 vendor dma_mask_bits local_cpus remove resource3

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• Confused about nova-network

  - by neo0

  I'm so sorry because this question doesn't related to Ubuntu. I asked in Openstack forum but this forum is not very active. So I think if someone have experience with Openstack Nova can help me with my problem. I've read some explanations about nova-network and how to configure it like this one from wiki: http://wiki.openstack.org/UnderstandingFlatNetworking I'm confusing about a detail. If every traffic from the instances must go through nova controller node, then why we still need the public interface for nova-compute node? Is it necessary? What happen when a request from outside to an instance. For example I have a controller node and a nova-compute node. In nova-compute node I run an instance with a Wordpress website. Then someone connect to the public IP of this instance. So the request go directly from router to the nova-compute node or from router to controller node then nova-compute node? Thank you!

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• Which languages are more conducive to telecommuting, and also less concerned with pairing?

  - by Dirk

  I don't know that it may even make a difference, and I reckon if it did the differences would be cultural rather than technical, but if one were going to set out today (2011) to learn a language, and specifically wanted to telecommute (so they could live in two different places during the year), are there any languages whose culture looks more favorably upon telecommuting than other languages / cultures? For example, I get the impression (and I am probably completely wrong) that in the Ruby community, you are more likely to be expected to be on-site and doing pair programming (though I suppose you can do pairing remotely too). As a corollary question, are there languages / communities where pair programming is less important, for people who wanted to program in part because they aren't social butterflies?

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• Microsoft Dynamics GP 2010 sortira le 1er Mai, amélioré en interopérabilité et en reporting

  Mise à jour du 24.04.2010 par Katleen Microsoft Dynamics GP 2010 sortira le 1er Mai, amélioré en interopérabilité et en reporting Microsoft Dynamics GP sera (enfin) très bientôt mis à jour, c'est une question de jours. Le premier Mai, le logiciel sera gratifié de plusieurs améliorations. Microsoft Dynamics GP 2010 comprendra de nouvelles fonctionnalités de reporting en business intelligence et sera mieux intégré grâce à un fonctionnement plus étroit avec Microsoft Dynamics CRM et Office Unified Communications, dans une logique d'amélioration de l'interopérabilité avec les autres produits Microsoft. Après trois ans d'attente, la patience des professionnels sera donc récompensée.

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• Ubuntu 12.10 - Resolution stuck at 1024x768 using Open Source Radeon Driver

  - by mumble

  I'm using Ubuntu 12.10 with an ATI Radeon HD5670 card. I currently have the open source xorg-edgers driver. I've been using this driver interchangeably with the Radeon open source driver since fglrx seems to give me a lot of freezes. So I can't really use proprietary drivers, the Radeon driver seems to be stable for me, the resolution is the only problem. The resolution is stuck at 1024x768, where my monitor's native resolution is 1366x768. How do I enable that resolution? Going to System Settings Display only gives me 800x600 and 1024x768 by the way. And just another question, how do I know if xorg-edgers driver is enabled? When I run sudo lshw -c video, I still see the radeon driver. configuration: driver=radeon latency=0 Thanks a lot in advance!

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• Uninstalling Ubuntu dual-boot bootrec issues

  - by Raymond Standen

  So on my laptop I am currently planning on uninstalling Ubuntu 12.04 so I can upgrade my Windows 7 partition to Windows 8, then install Ubuntu 12.10. My issue being that when I boot the Windows 7 recovery disk, I believe i Need to use cmd to run bootrec /fixboot and bootrec /fixmbr. Now, whilst fixmbr works, fixboot yields me with an error regarding an unrecognised volume. When I turn on my PC now, I am no longer met the GRUB option, so I boot straight into Windows. My question is: As such, do I still need to have fixboot run or can I just format and resize the partitions now even with the error when running fixboot?

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• Google Authorship Image of my blogspot has been disappeared in Google SERP. Why?

  - by Sathiya Kumar

  I have a blogspot and i used my image to appear on the Google SERP for my keywords using Google Authorship Markup. My image was showed for last 2 months but while checking SERP for my blog, i found that my authorship markup is not working. My image, name and G+ followers count is not appearing near my blogspot URL in SERP. I didn't made any changes in my google+ profile or in my blogspot header tag where i had put the authorship code. I tried to find the reason but i didn't find any value answer. May anyone answer this question. Please let me know if you had already experienced like this.

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• Is there a way to make the speaker silent while the headphone-jack keeps working? 12.04LTS

  - by Cees

  The PC I am working on is in a loud environment. If I need sound, I use the headphone. On my own account this is easy: I mute the speaker in the sound-setting. I am not the only user, others use the Guest-session. And that's what this question about: Is it possible to turn off the speaker by default on a guest-session AND leave the headphone-output working? If yes, how can I fix it? I tried to loosen the speaker (hardware) connection but it is soldered to the mainboard. The soundcard on the PC is: HDA Intel at 0xfea78000 irq 44 /proc/asound/pcm ---------------------------+ ¦00-00: ALC662 rev1 Analog : ALC662 rev1 Analog : playback 1 : capture 1¦ ¦00-02: ALC662 rev1 Analog : ALC662 rev1 Analog : capture 1 Ubuntu 12.04LTS is running on the system, my account has all the (admin) rights

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• Advice: How to overcome the "accent" barrier in cross-geographical teams ?

  - by shan23

  I'm an Indian working in a MNC. As a result, I often have to attend(and contribute) to meetings where I have to listen to people who have a pronounced American accent. Some are still understandable, but a couple of people I have interact with speak such a different form of English, I mostly have to guess at what they are saying. When I ask them to clarify, they often speak the same sentence in the same tenor/speed, so my net gain is zero. My question is, how to politely put it across that due to their accent, I can't understand a thing, and may they please speak slowly and a bit clearly ? Some people might take it a bit personally, since "everyone else" is understanding them perfectly...and I don't want to cause offense at all. Any ideas ?

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• How to promote travel blog? [closed]

  - by Tschareck

  Possible Duplicate: What are the best ways to increase your site's position in Google? How can I increase the traffic to my site? I know this question might seem a little off topic, but blogging may become important part of travel. Nowadays, in time of Facebook, Twitter and similar services, keeping a travel blog may seem a little archaic. It's not 2005 anymore. But a lot of my travel colleagues update their blogs and have significant number of readers. I also tried to keep my blog when I travel. However it seems that the only reader is my mum ;) What is your advice on promoting a travel blog?

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