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• Routing different domains on a VPS

  - by Hans Wassink

  We just went from shared hosting to a VPS server. We have several domain names that we have pointing to our dns, but they all point to the root of the server. What I would like now is a setup where every domain name gets its own map so we can run different sites on the VPS server. Like: www.example.com points to: /var/www/example.com www.imapwnu.com points to: /var/www/imapwnu.com First of all, is this possible? Second, I have root SSH access and Webmin, on a LAMP server running on Ubuntu. Webmin doesnt have Bind9 (I dont know if I need that, some forums pointed me towards something called bind). Thanks in advance

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• Transitioning from a mechanical engineer to software developer. What path to take?

  - by Patrick

  Hi all, I am 24 years old and have a BS in mechanical engineering from Mizzou. I have been working as a mechanical engineer in a big corporation for about 2 years since graduation. In this time, I have decided that I'm just not that interested in mechanical engineering topics, and I'm much more excited about web technology, website design, etc. I do a very small amount of freelance web design just to get experience, but I have no formal training yet. Ultimately I could see myself being very excited about working for a small startup in web technology, or creating and selling my own programs in more of an entrepreneurial role. What path do you recommend for transitioning into this field? Go back to school and get a BS in CS? MS in CS? Tech school for classes? Self study? I'm feeling overwhelmed by the options available, but the one thing I know for sure is that I'm excited to make a change. Thanks!

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• Sabnzbd Installed on Linux NAS

  - by Mike Szp.

  I installed SABnzbd on a linux formatted NAS. Now the directory it downloads to is mapped differently on the NAS itself, because the path that SABnzbd knows about starts in it's own folder. If this sounds confusing let me give you an example: \\MYNAS\Volume_1\ That is the path of the drive on the NAS. I would like my SABnzbd downloads to go to: \\MYNAS\Volume_1\Downloads Right now SABnzbd is installed to: \\MYNAS\Volume_1\ffp\opt\optware\share\SABnzbd And the default download directory (as indicated in SABnzbd is): /ffp/opt/optware/share/SABnzbd/downloads/complete I know that the mapping is different somehow because It is installed on the NAS, but I just am lost as to what I should do. So far, I have tried for the complete folder: /192.168.restofip/Volume_1/downloads/complete /Volumes/Volume_1/downloads/complete /Volume_1/downloads/complete Does anyone know how to change the path so that I can have it download to one of the topmost folders on the NAS instead of having it download to a folder so deep in the drive?

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• Keyloggers and Virtualization

  - by paranoid

  Whilst pondering about security, and setting up different VM for certain online activities deemed more risky or requiring extra security (banking, or visiting untrusted websites, etc), I came to think about how such a setup (different VMs for different uses) would defend me against a keylogger. So, two questions then: 1: If a keylogger has been installed inside a VM, can it capture data outside its own VM? 2: The opposite, does a keylogger in a host capture strokes typed within a VM residing in that host? My bet would be No and Yes respectively, but I really have no idea. Anyone else does?

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• Software development process for a part time University project for 1 developer?

  - by Pricey

  I will be doing a part time University project soon and the time frame for it is around 8 months with approximately 10-15 hours a week spent working on it, with a review by a tutor each quarter. My question is what software development process would you recommend using when the course requires you to work on your own in order to manage yourself as well as the project? I wanted to use a weekly or bi-weekly iterative approach to my work but a lot of the processes seem tailored to teams of people. I am looking at XP (Extreme Programming) OR Scrum as something that is less than the norm for University work but again Scrum I don't know a lot about yet, and a question I have is; can you say you are doing XP without pair-programming? because my tutor seems to think that I have to stick to all the practices otherwise I can't do it (nevermind if I am working alone). We can have external user input as well but due to the small timescales with part time work it may be more beneficial for myself to be the user as well, which is not what I prefer considering how I can get lost in the design.

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• what are python libraries to work with git without installing git

  - by Arash

  I want to develop an application using python. It should be able to work with git repositories (show diffs, ...) I need a python library to work with .git repositories (creating, cloning, commit, ...) without installing git on my system. It would be nice if you give your own idea about each library you suggest. Information about how its documentation is? how bug free it is? and if it has an active development? is appreciated. Thanks in advance

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• Why was my site rejected for Google Adsense?

  - by hyuun jjang

  I have a 3 year old blog and its got around 16 articles/tutorials about some programming problems and solutions. It's getting pretty much a lot of view lately so I decided to apply for a google adsense account. When I first applied via blogger, google replied with the following statement: Page Type: In order to participate in Google AdSense, publishers' websites and application information must satisfy the following guidelines: - Your website must be your own top-level domain (www.example.com and not www.example.com/mysite). - You must provide accurate personal information with your application that matches the information on your domain registration. - Your website must contain substantial, original content... So, as I understood it, I decide to buy a domain and point my blogger blog to that new naked domain. and here is the newly bought domain where all the contents of my old blog resides. http://icodeya.com/ I reapplied, hoping that this time, I will make the cut. But then I got this reply Further detail: Unable to review your site: While reviewing http://www.icodeya.com/, we found that your site was down or unavailable. We suggest you check whether there was a typo in the URL submitted. When your site is operational, you can resubmit your application with the correct site by following the directions below. I'm a bit disappointed. Maybe I did something wrong with DNS configuration or something. But you can clearly see that my site is fully functional. I heard that google sends robots to crawl on to the site etc. It's just sad because I invested on a domain name, and now I can't even find ways to earn from it. Any tips?

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• Ubuntu 12.04 LTS won't install - never finishes please help

  - by Richard Higgins

  Want to try Ubuntu after using Windows for 30 years. Tried to install it 5 times on a Lenovo X120e notebook and twice on a Lenovo M57 desktop. No luck, worse than what Microsoft puts you through. I burned 12.04 LTS to disc. It installs up to the "Who Are You?" screen, then stops. Accepted the recommended computer name and lower case user name. I chose "log me in automatically." After that there is no progress bar, no rotating or pulsing button, nothing to indicate the Ubuntu has not died or fallen asleep. Is that how it is written? Never heard of a program that would take a long time to install while a user looked at a locked, dead screen. I just bought the M57 desktop for my son. It came with Ubuntu 10 something. I wanted to upgrade to 12.04 but it crashed, twice, to a DOS screen saying the pc lacked a certain "init" file. Various help screen commands did not help. On the X120e, I thought a partial-failed Ubuntu install was causing the problem, so I removed the drive and deleted the Ubuntu partition and replaced it. But same result. After I fill in my name, accept computer and user name, the "continue" button does not appear to work. I can go "back" but not forward. I have waited torturous hours. It doesn't take more than two hours to install, does it?any It is my own fault because of the high expectations I had for a sensible, hassle-free installation, but I am immensely disappointed. Thank you for any response

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• Antenna Aligner part 2: Finding the right direction

  - by Chris George

  Last time I managed to get "my first app(tm)" built, published and running on my iPhone. This was really cool, a piece of my code running on my very own device. Ok, so I'm easily pleased! The next challenge was actually trying to determine what it was I wanted this app to do, and how to do it. Reverting back to good old paper and pen, I started sketching out designs for the app. I knew I wanted it to get a list of transmitters, then clicking on a transmitter would display a compass type view, with an arrow pointing the right way. I figured there would not be much point in continuing until I know I could do the graphical part of the project, i.e. the rotating compass, so armed with that reasoning (plus the fact I just wanted to get on and code!), I once again dived into visual studio. Using my friend (google) I found some example code for getting the compass data from the phone using the PhoneGap framework. // onSuccess: Get the current heading // function onSuccess(heading) {    alert('Heading: ' + heading); } navigator.compass.getCurrentHeading(onSuccess, onError); Using the ripple mobile emulator this showed that it was successfully getting the compass heading. But it didn't work when uploaded to my phone. It turns out that the examples I had been looking at were for PhoneGap 1.0, and Nomad uses PhoneGap 1.4.1. In 1.4.1, getCurrentHeading provides a compass object to onSuccess, not just a numeric value, so the code now looks like // onSuccess: Get the current magnetic heading // function onSuccess(heading) {    alert('Heading: ' + heading.magneticHeading); }; navigator.compass.getCurrentHeading(onSuccess, onError); So the lesson learnt from this... read the documentation for the version you are actually using! This does, however, lead to compatibility problems with ripple as it only supports 1.0 which is a real pain. I hope that the ripple system is updated sometime soon.

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• Configuring Nginx for Wordpress and Rails

  - by Michael Buckbee

  I'm trying to setup a single website (domain) that contains both a front end Wordpress installation and a single directory Ruby on Rails application. I can get either one to work successfully on their own, but can't sort out the configuration that would let me coexist. The following is my best attempt, but it results in all rails requests being picked up by the try_files block and redirected to "/". server { listen 80; server_name www.flickscanapp.com; root /var/www/flickscansite; index index.php; try_files $uri $uri/ /index.php; location ~ \.php$ { include fastcgi_params; fastcgi_pass 127.0.0.1:9000; fastcgi_index index.php; fastcgi_param SCRIPT_FILENAME /var/www/flickscansite$fastcgi_script_name; } passenger_enabled on; passenger_base_uri /rails; } An example request of the Rails app would be http://www.flickscan.com/rails/movies/upc/025192395925

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• Rant - Why is Windows Azure not available in Africa?

  - by Allan Rwakatungu

  Yesterday at the .NET user group meeting in Kampala Uganda  I gave a talk on cloud computing with Windows Azure  (details will be in my next blog post). The guys where excited. Without owning they own inftrastucture and at low cost they can build scalable , highly available applications. Not quite. Azure accounts are only available to people in particular countries - none from Africa. I attended PDC in 2008 when Microsoft unleashed Windows Azure. One of the case studies to show the benefits ofr cloud computing was a project in Africa for an education service in Ethiopia. The point they where making was that the cloud was perfect for scenarios where computing infrastructure is not sophiscated, like Ethiopia. Perfect , i thought. So i got my beta account from PDC and started playing around in the cloud. Then Azure goes live , my beta account does not work any more and I cant pay because am from Uganda. Microsoft , this sucks. I dont know the reasons for Microsoft doing this, but am sure we can work out something. We in Africa need the cloud more than anybody else in the world. Setting up data centers that are higly scalable and available for our startups is not an option we have. But we also cant pay for cloud computing with Microsoft. Microsoft, we know we are a tiny insigficant market for a company your size, but your excluding us only continues to widen the digital divide. Microsoft , how about you have a reseller model for cloud computing. Instead of trying to deal direclty with each client you have local partners who help you sell and bill your cloud services. I think that would lead to Windows Azure being available in Africa. I can help you resell in Uganda.

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• What is the Best Free Linux Gateway

  - by rockinthesixstring

  I'm looking at moving away from using my DIR-825 as a gateway and moving into a Linux box to do it all for me. I've found IPCop, but I'm looking for something with a little more power. My main goal is basically to be able to point different external domain names to different internal servers. backup.example.com - 192.168.0.5 home.example.com - 192.168.0.1 I host my DNS on my own dedicated server (windows), so I don't know much about doing the gateway thing in my home (my hosting provider does it all for me). Do any of you know of any free Linux Distros that can accomplish what I'm looking for?

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• Limit disk I/O one program creates?

  - by Posipiet

  Hardware: one virtualization server. Dual Nehalem, 24GB RAM, 2 TB mirrored HD. Software: Debian, KVM, virt-manager on the server with several virtual machines that use Linux too. 2 TB Disk is a big LVM, each VM gets a logical volume and makes its own partitions in that. Problem: One of the programs that runs on one of the VMs creates huge disk load. This never was an issue, because the program never ran on such a powerful hardware. Now the CPUs are fast, and lots of I/O is the result. We cant do much against that at the moment, because the tool is a black box. On the other hand, the speedy computation is welcome. The program creates about 5 GB of temp files which get overwritten during the next iteration. Question: How can we limit the disk I/O for the process?

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• Script or Utility to convert .nab to .csv without importing double entries in Outlook.

  - by Chris

  Currently our environment is migrating from Groupwise 7 to Outlook 2003 and we have multiple users with mission critical outside contacts in their frequent contacts that will have to be imported in Outlook. Currently our only solution is to export GW contacts to a .nab, import to excel to scrub out the contacts in our own domain (to avoid double entry) and convert to .csv. This current solution will require a lot of man hours for hand holding because most of our users are not technically savvy AT ALL and are frankly too busy to do this themselves. Anyone know of any kind of tool or script to assist with this?

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• What's the best way to monitor a large number of application pools in IIS7?

  - by Kev

  Some background first - We're running IIS 7 on Windows 2008. We're running around 250 websites per server with each site in it's own application pool. I need a way to monitor each application pool for crashes and hangs and to send an email alert if an application pool is unresponsive for more than say 2 minutes. I thought about having a virtual directory mapped into each site with an ASP.NET page that we could poll via our existing monitoring system (HostMonitor). Does anyone else have experience in this area?

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• How to build Visual Studio Setup projects (.vdproj) with TFS 2010 Build ?

  - by Vishal

  Out of the box, Team Foundation Server 2010 Build does not support building of setup projects (.vdproj). Although, you can modify DefaultTemplate.xaml or create your own in order to achieve this. I had to try bunch of different blog post's and finally got it working with a mixture of all those posts.   Since you don’t have to go through this pain again, I have uploaded the Template which you can use right away : https://skydrive.live.com/redir?resid=65B2671F6B93CDE9!310 Download and CheckIn this template into your source control. Modify your Build Definition to use this template. Unless you have CheckedIn the template, it wont show up in the template selection section in the process task of build definition. In your Visual Studio Solution Configuration Manager, make sure you specify to build the setup project also. You might get this warning in your build result: “The project file “*.vdproj” is not support by MSBuild and cannot be build. Hope it helps. Thanks, Vishal Mody Reference blog posts I had used: http://geekswithblogs.net/jakob/archive/2010/05/14/building-visual-studio-setup-projects-with-tfs-2010-team-build.aspx http://donovanbrown.com/post/I-need-to-build-a-project-that-is-not-supported-by-MSBuild.aspx http://lajak.wordpress.com/2011/02/19/build-biztalk-deployment-framework-projects-using-tfs2010/

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• Run script when POST data is sent to Apache

  - by Nathan Adams

  Among my several years of running servers there seems to be a pattern with most spam activity. My question/idea is that is there a way to tell Apache to run a script when POST data is detected? What I would want to do is perform a reverse DNS lookup on the client's IP address, and then perform a DNS lookup on the hostname in the PTR record. Afterwards, perform some checks, excuse the pseudo-code: if PTR does not exist: deny POST request if IP of PTR hostname = client's IP Allow POST request else deny POST request Though I don't care about GET requests, even though they can be just as malicious, this idea is targeted towards spam comments which use POST data to send the comment data to the web server. In order to make sure there isn't much of a time delay, I would run my own recursive DNS server. Please do note, this isn't meant to be a sliver bullet to spam, but it should decrease the volume. Possible or impossible?

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• Making LISPs manageable

  - by Andrea

  I am trying to learn Clojure, which seems a good candidate for a successful LISP. I have no problem with the concepts, but now I would like to start actually doing something. Here it comes my problem. As I mainly do web stuff, I have been looking into existing frameworks, database libraries, templating libraries and so on. Often these libraries are heavily based on macros. Now, I like very much the possibility of writing macros to get a simpler syntax than it would be possible otherwise. But it definitely adds another layer of complexity. Let me take an example of a migration in Lobos from a blog post: (defmigration add-posts-table (up [] (create clogdb (table :posts (integer :id :primary-key ) (varchar :title 250) (text :content ) (boolean :status (default false)) (timestamp :created (default (now))) (timestamp :published ) (integer :author [:refer :authors :id] :not-null)))) (down [] (drop (table :posts )))) It is very readable indeed. But it is hard to recognize what the structure is. What does the function timestamp return? Or is it a macro? Having all this freedom of writing my own syntax means that I have to learn other people's syntax for every library I want to use. How can I learn to use these components effectively? Am I supposed to learn each small DSL as a black box?

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• How complex of a daemon should be run through inetd?

  - by amphetamachine

  What is the general rule for which daemons should be started up through inetd? Currently, on my server, sshd, apache and sendmail are set up to run all the time, where simple *NIX services are set up to be started by inetd. I'm the only one who uses ssh on my computer, and break-in attempts aren't a problem because I have it running on a non-standard port, and my HTTP server gets maybe 5 hits a day that aren't GoogleBot. My question is, what are the benefits vs. the performance hits associated with running a complex daemon like sshd or apache through superserver, and what, if any successes or failures have you had running your own daemons in this manner?

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• How can I pass referrer header from my https domain to http domains?

  - by nutcracker

  My website is 100% https. I have links to other http domains. The referrer header is not set when linking from a https page to a http page. From http://en.wikipedia.org/wiki/HTTP_referrer If a website is accessed from a HTTP Secure (HTTPS) connection and a link points to anywhere except another secure location, then the referer field is not sent. I would prefer that other domains can see the referrer so that they know that traffic comes from my domain. Is there a way to force this header or is there another solution? Update I've done some basic testing using a redirect: http page -- link to http --> 301 redirect --> http page = referrer intact https page -- link to https --> 301 redirect --> http page = referrer blank https page -- link to http --> 301 redirect --> http page = referrer blank https page -- link to http --> 302 redirect --> http page = referrer blank The referrer is lost when linking from a https page to a http redirect page on my own domain. So there is no referrer on the redirect.

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• Initializing entities vs having a constructor parameter

  - by Vee

  I'm working on a turn-based tile-based puzzle game, and to create new entities, I use this code: Field.CreateEntity(10, 5, Factory.Player()); This creates a new Player at [10; 5]. I'm using a factory-like class to create entities via composition. This is what the CreateEntity method looks like: public void CreateEntity(int mX, int mY, Entity mEntity) { mEntity.Field = this; TileManager.AddEntity(mEntity, true); GetTile(mX, mY).AddEntity(mEntity); mEntity.Initialize(); InvokeOnEntityCreated(mEntity); } Since many of the components (and also logic) of the entities require to know what the tile they're in is, or what the field they belong to is, I need to have mEntity.Initialize(); to know when the entity knows its own field and tile. The Initialize(); method contains a call to an event handler, so that I can do stuff like this in the factory class: result.OnInitialize += () => result.AddTags(TDLibConstants.GroundWalkableTag, TDLibConstants.TrapdoorTag); result.OnInitialize += () => result.AddComponents(new RenderComponent(), new ElementComponent(), new DirectionComponent()); This works so far, but it is not elegant and it's very open to bugs. I'm also using the same idea with components: they have a parameterless constructor, and when you call the AddComponent(mComponent); method in an entity, it is the entity's job to set the component's entity to itself. The alternative would be having a Field, int, int parameters in the factory class, to do stuff like: new Entity(Field, 10, 5); But I also don't like the fact that I have to create new entities like this. I would prefer creating entities via the Field object itself. How can I make entity/component creation more elegant and less prone to bugs?

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• Recording slow web stream

  - by Budric

  I'm trying to record an mpeg2 video stream from a website that doesn't have the greatest bandwidth. The video often buffers. I want to download the stream and watch it offline. The extract stream format received is: Stream #0.0[0x44]: Audio: mp2, 48000 Hz, stereo, s16, 192 kb/s Stream #0.1[0x45]: Video: mpeg2video (Main), yuv420p, 704x576 [PAR 16:11 DAR 16:9], 15000 kb/s, 27.19 fps, 25 tbr, 90k tbn, 50 tbc I use the following tool to transocde the stream: ffmpeg -i "http://url" -y -vcodec libx264 -b 3000k -acodec copy /tmp/stream.mp4 Unfortunately after a few seconds ffmpeg stops recording with an error [mpegts @ 0x1f0b9c0] PES packet size mismatch [mp2 @ 0x1f14640] incomplete frame Error while decoding stream #0.0 [mpeg2video @ 0x1f16860] ac-tex damaged at 0 26 [mpeg2video @ 0x1f16860] Warning MVs not available I've tried encoding with vlc as well with similar issues. Although vlc doesn't stop encoding, the output video has regions where it hangs. vlc -I dummy "http://url" --network-caching="1000" --sout="#transcode{vcodec=h264,vb=3000,acodec=mp3,ab=192}:std{access=file,mux=mp4,dst=/tmp/stream.mp4}" [mpeg2video @ 0x7f2d4c001e20] ac-tex damaged at 9 33 [mpeg2video @ 0x7f2d4c001e20] Warning MVs not available [mpeg2video @ 0x7f2d4c001e20] concealing 132 DC, 132 AC, 132 MV errors [mpeg2video @ 0x7f2d4c001e20] ac-tex damaged at 16 17 [mpeg2video @ 0x7f2d4c001e20] Warning MVs not available [mpeg2video @ 0x7f2d4c001e20] concealing 836 DC, 836 AC, 836 MV errors libdvbpsi error (PSI decoder): TS discontinuity (received 4, expected 3) for PID 0 I also tried flv transcoding and it shows up with its own set of issues, like output flv file hangs in certain parts. Anyone know what's wrong or how to fix this?

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• Should I expect my team to have more than a basic proficiency with our source control system?

  - by Joshua Smith

  My company switched from Subversion to Git about three months ago. We had weeks of advance notice prior to the switch. Since I'd never used Git before (or any other DVCS), I read Pro Git and spent a little time spinning up my own repositories and playing around, so that when we switched I'd be able to keep working with minimal pain. Now I'm the 'Git guy' by default. With a couple of exceptions, most of my team still has no idea how Git works. For example, they still think of branches as complete copies of the source code, and even go so far as to clone the repo into multiple folders (one per branch). They generally look at Git as a scary black box. Given the fundamental nature of source control in our daily work (not to mention the ridiculous amount of power Git affords us), I'm of the opinion that any dev who doesn't achieve a certain level of proficiency with it is a liability. Should I expect my team to have at least some understanding of how Git works internally, and how to use it beyond the most basic pull/merge/push operations? Or am I just making something out of nothing?

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• Planning milestones and time

  - by Ignas

  I was hired by a marketing company a year ago initially for link building / SEO stuff, but I'm actually a Web developer and took the job just in desperation to have one (I'm still quite young and just finished 2nd year of University). From the 3rd day my boss realised that I'm not into that stuff at all and since he had an idea of a web based app we started to plan it. I estimated that it shouldn't take me longer than two months to do it, but as I was making it we soon realised that we want to add more and more stuff to make it even better. So the development on my own lasted for about 4 months, but then it became an enterprise size app and we hired another programmer to work along me. The guy was awesome at what he did, but because I was assigned to be programmer/project manager I had to set up milestones with deadlines and we missed most of them, because most of the time it was too much work, and my lack of experience kept me setting really optimistic deadlines. We still kept adding features and had changed the architecture of the application twice. My boss is a great guy and he gets that when we add features it expands the time frame in which things should be done so he wasn't angry at me nor the other guy. But I was feeling bad (I still am) that I suck at planning. I gained loads of experience from the programming side, but I still lack the management/planning skills which make me go nuts. So over the last year I have dedicated probably about 8 months of work to this app (obviously my studies affected it) and we're launching as a closed beta this month. So my question is how do I get better at planning/managing a project, how do you estimate the times? What do you take into consideration when setting goals. I'm working alone again because the other guy moved from the city. But I'm sure we'll be hiring to help me maintain it so I need to get better at it. Any hints, points or anything on the topic are appreciated.

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• networking fails when DNS servers are specified manualy

  - by Matthew Scouten

  When I let Windows-7 use DHCP to find its own DNS server, everything works fine. Then I use ipconfig to get the IPs of the DNS servers in question, and specify them manually. Now the network stops working. (I need to do this because my next step is to restore the router that is going to lie about the proper DNS server. Don't ask why, it is required by my father's work. The IT there are not exactly on the ball.) Why would this make a difference? It is the same set of servers, just obtained differently.

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