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• How do I obtain a valid DNS resolution given just an IP address?

  - by Dee Newcum

  Is there a publicly-available DNS server somewhere that will respond to requests like: 74_125_225_50.anyip.com And will return 74.125.225.50 for the above request? That is, every single possible IP address can queried by name instead of number. http://ipq.co/ is close to what I'm looking for, but it requires you to first register an IP address before you can query its DNS name. I want a service that does a straightforward mapping from domain name to IP address. Why do I want to do this? I have a program that we use at work that requires a DNS lookup, but I need to be able to give it bare IP addresses. (long story... it's a server that I don't control, so I can't work around it using /etc/hosts)

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• Locate rogue DHCP server

  - by Farseeker

  I know this is a serious long shot, but here we go. In the past week or so, for users connected to a particular switch in our network (there are four dumb switches all connected, and it only affects SOME, not all, users on the one switch) are getting DHCP addresses from a rogue DHCP server. I have physically checked every cable plugged into the switch in question to make sure that none of them have a router or wifi point attached to it. I know the IP of the DHCP server, but I cannot ping it, and it does not have a web interface. Does anyone have any suggestions on what I can do to locate it or shut it down? Unfortuantely all the switches are unmanaged, and as mentioned, there's no physical device (that I can find) plugged in to anything. It's getting critical, because it's screwing up the PXE boot of a whole bunch of thin clients.

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• Are all bluetooth adapters the same ?

  - by ldigas

  I have a wireless bluetooth mouse which I'm not using. It used to have a bluetooth adapter with it, which I lost a long time ago ... (don't ask). Since my regular mouse just died (bad contact in cable from messing with it too much) I was thinking of buying just the new generic bluetooth adapter ? Are all those adapters the same thing ? Or can this that came with the mouse be somehow different ? Edit by ldigas: How would one find out what bluetooth standard/class/adapter one needs ? (I don't see anything useful written on the sticker on the mouse). Or to put it bluntly - will it work with this one in your opinion ?

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• Bash: Reset and Clear Commands

  - by sixtyfootersdude

  I have been using the command: reset to clear my terminal. Although I am pretty sure this is not what I should be doing. Reset, as the name suggests resets your entire terminal (changes lots of stuff). Here is what I want: I basically want to use the command clear. However if you clear and then scroll up you still get tonnes of stuff from before. In general this is not a problem however I am looking at gross logs that are long and I want to make sure that I am just viewing the most recent one. I know that I could use more or something like that but I prefer this approach.

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• Fixing Windows 7 hibernation

  - by 80skeys

  I've been mucking around with the partitions on my laptop (I'm an experienced Linux/grub guy) and have somehow ended up affecting the ability of Windows 7 to go into hibernate mode. All other functionality seems to be okay. But when I press Hibernate, it behaves as if it starts to (screen goes dark, a little disk activity) but never powers off and if I move the mouse the login screen instantly comes up. I don't know if Window uses a separate partition for hibernation? There is a 200MB partition on the drive - I seem to recall it was related to diagnostics or some other Windows- boot menu stuff. In any case, wondering if there's some commands I can run to restore the ability to hibernate and also which partitions need to be marked "active" and if there's anything I need to do to the MBR of the hard drive or the MBR of the Windows partition? As I said, Windows boots fine as long as it is designated the Active partition. I just need to fix Hibernation.

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• How to become a Kernel/Systems/Device driver programmer?

  - by accordionfolder

  Hello all! I currently work in a professional capacity as a software engineer working with the Android OS. We work at integrating our platform as a native daemon among other facets of the project. I primarily work in Java developing the SDK and Android applications, but get to help with the platform in C/C++. Anywho, I have a great interest to work professionally developing low level for linux. I am not unhappy in my current position and will hang around as long as the company lets me (as a matter of fact I quite enjoy working there!), but I would like to work my way that direction. I've been working through Linux Kernel Development (Robert Love) and The Linux Programming Interface (Michael Kerrisk) (In addition to strengthening my C skills at every chance I get) and casually browsing Monster and similar sites. The problem I see is, there are no entry level positions. How does one break into this field? Anytime I see "Linux Systems Programmer" or "Linux Device Driver Programmer" they all require at the minimum 5-7 years of relevant experience. They want someone who knows the ropes, not a junior level programmer (I've been working for 7 months now...). So, I'm assuming, that some of you on stackoverflow work in a professional capacity doing just what I would like to do. How did you get there? What platforms did you use to work your way there? Am I going to have a more difficult time because I have my bachelors in CSC as opposed to a computer engineer (where they would experience a bit more embedded, asm, etc)?

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• Does this file format exist?

  - by Jon Chase

  Is there a file format that handles the following use case... I'd like to create a tar file (or whatever - I'm just using tar here b/c it's a well known file format for containing multiple files) that would be usable even if I only had access to specific chunks of said file. For example, say I tar up my mp3 and photo collection into a 100GB tar file, then put the file into some long term storage somewhere. Later, I want to access a specific mp3 file. I don't want to download the entire 100GB tar file just to get to one mp3. In fact, let's say I can't download the entire 100GB tar file. Instead, I'd like to say "give me megabytes 10 through 19 of the 100GB tar file" and then have the mp3 magically extracted from those 10 megabytes. Does a file format like this exist?

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• Dvorak hotkey remapping in vim, worth it?

  - by Bryan Ward

  I've been trying to learn the dvorak keyboard layout of late and I have been making some good progress this time around. The trouble I am finding now is that all of my hotkeys are all in the wrong places. As a vim user this is particularly troubling. I have found good resources to switch the bindings back so that they are in the places in vim, but I wonder if this is worth it. I also use set -o vi in my ~/.zshrc file so that I can use the familiar bindings in the terminal as well. hjkl navigation is also featured in a number of other applications such as less. For those of you out there who have successfully made the switch, is it worth remapping things to be familiar again, or is it better in the long run to just deal with weirdly placed hotkeys?

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• Async & Await in C# with Xamarin

  - by Wallym

   One of the great things about the .NET Framework is that Microsoft has worked long and hard to improve many features. Since the initial release of .NET 1.0, there has been support for threading via .NET threads as well as an application-level threadpool. This provided a great starting point when compared to Visual Basic 6 and classic ASP programming. The release of.NET 4 brought significant improvements in the area of threading, asynchronous operations and parallel operations. While the improvements made working with asynchronous operations easier, new problems were introduced, since many of these operations work based on callbacks. For example: How should a developer handle error checking? The program flow tends to be non-linear. Fixing bugs can be problematic. It is hard for a developer to get an understanding of what is happening within an application. The release of .NET 4.5 (and C# 5.0), in the fall of 2012, was a blockbuster update with regards to asynchronous operations and threads. Microsoft has added C# language keywords to take this non-linear callback-based program flow and turn it into a much more linear flow. Recently, Xamarin has updated Xamarin.Android and Xamarin.iOS to support async. This article will look at how Xamarin has implemented the .NET 4.5/C# 5 support into their Xamarin.iOS and Xamarin.Android productions. There are three general areas that I'll focus on: A general look at the asynchronous support in Xamarin's mobile products. This includes async, await, and the implications that this has for cross-platform code. The new HttpClient class that is provided in .NET 4.5/Mono 3.2. Xamarin's extensions for asynchronous operations for Android and iOS. FYI: Be aware that sometimes the OpenWeatherMap API breaks, for no reason.  I found this out after I shipped the article in.

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• Platform Builder: Removing the Version Information from the Desktop

  - by Bruce Eitman

  The question of how to remove the version information from the desktop has been around for a long time. It came up again today. The question is about the string displayed on the desktop that looks like one of these, depending on the OS verison: Windows Embedded CE v6.00 (Build xxxx on xxxx) Microsoft Windows CE v5.00 (Build xxxx on xxxx) Microsoft Windows CE .NET v4.20 (Build xxxx on xxxx) I have looked into this in the past, but never really had a definitive answer. I have an answer now. The short answer is that the version information is displayed if the code is built without SHIP_BUILD defined.  I have to be honest, I have given this answer in the newsgroups in the past, but I still had questions. My questions have come from different build machines giving different results.   I have noticed that some engineer’s workstations would have the version information displayed, while others did not. I always stopped short of spending time investigating further because our release build machines never resulted in the version information being displayed. But, we do not typically define SHIP_BUILD for our releases because our customers want or need the debug output. So today I dug further into the question. The answer is actually quite simple. Microsoft builds the retail shell libraries with SHIP_BUILD defined and releases the libraries with Platform Builder. Normally the source code does not need to be built during Sysgen, so the libraries that Microsoft delivered are linked to create the Explorer shell. So typically the Explorer shell displays the version information for debug builds, but does not for retail builds. The trouble comes when the source code is forced to be rebuilt for a retail build. This might happen if an engineer uses “Build and Sysgen” or builds the Public\Shell folder from the command line with the clean flag. I am not sure if Build and Sysgen will cause the problem or not – I have never used Build and Sysgen and I strongly advise against using it (see Platform Builder: Don’t use Build and Sysgen) Copyright © 2010 – Bruce Eitman All Rights Reserved

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• Rendering with Direct3D

  - by Jamie

  Hi, I'm slightly confused about how Direct3D rendering works. Basically, as long as I render to one surface, everything is fine. But when I try rendering to multiple surfaces, it seems like everything is still rendered to one surface. I think there's something wrong with my calls. For each update cycle this is what I do 1. device-BeginScene() 2. sprite-Begin(...) ... A bunch of GetRenderTarget to store the old render target, then SetRenderTarget to set a new surface, and then things like CreateVertexBuffer, SetTexture, etc to draw on the new render target. Then resetting to the old render target. sprite-Draw([the back buffer]) (the back buffer is actually another surface, not the actual back buffer. But here it is being drawn onto the actual back buffer, I think) sprite-End() device-EndScene() device-Present(...) Also, it seems like if I mix sprite drawing and non-sprite drawing onto a surface, that first one set of render commands is executed and then the other set, rather than in order by when each command was called. If anyone could shed light on any of this, it would be much appreciated.

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• How to securely generate memorable passwords?

  - by Tim

  Whenever I need new passwords I use some tools to generate those, preferable memorable passwords, but I've been wondering how secure this might actually be. Using The xkcd random number generator is probably pretty bad, cat /dev/random is probably pretty good, but generating memorable passwords seems a bit more tricky. Whenever a program generates a memorable password, it only uses a subset of the total password space available, and it is not clear to me how big this space is. Of course a long password should help in this case, but if the `memorable' part of the program is too predictable, your passwords are not very good in the end. TL;DR: how secure are memorable password generators, given the fact that `memorable' passwords are a subset of total password space? Some tools I know of: pwgen -- seems ok, but passwords are not too memorable Mac Password Assistant - generates memorable passwords but it is unclear to me how this works.

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• Gmail page works but won't stop loading

  - by MLW

  When I open the GMail page in Chrome (9.0.597.102) on OS X (10.6.4), the page works fine and is functional, but it often remains in a "Loading" state, with the loading icon active, for extremely long periods of time. Functionally, there is no problem, since everything is accessible, and the problem is intermittent. Sometimes it immediately completes loading, other times it will claim to be "loading" for hours. My date is correct (as set with time.*.apple.com), and I don't have any Google Labs enabled. Does anyone else have this problem, or know the cause and solution?

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• A client wants us to screen work machines for pornography. Is it possible?

  - by Scant Roger

  A long-time client has asked us to help screen their work machines for pornography. They're worried about liability if sensitive materials were found. Their main concerns (for obvious reasons) are video, audio, and image files. If possible, they'd also like to scan text-based documents for inappropriate content. They have a hierarchy of not-for-work content starting with blatantly illegal (I don't have to list details), moving down to obviously offensive, and also including things that may be offensive to some - think lingerie ads, joke cards featuring butt cracks, and anything related to Howie Mandel. My questions are: Is this ethical? I think it is since every employee legally agrees that their work machine belongs to the company and is subject to search. The screenings are not to occur on personal machines brought to work. Is it feasible? I've done a lot of image processing/indexing but this seems like a whole new world of complexity. Any references to successful techniques for discovering porn? Is it appropriate for me to archive the results when something is discovered?

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• Linux memory fragmentation

  - by Raghu

  Hi all, Is there a way to detect memory fragmentation on linux ? This is because on some long running servers I have noticed performance degradation and only after I restart process I see better performance. I noticed it more when using linux huge page support -- are huge pages in linux more prone to fragmentation ? I have looked at /proc/buddyinfo in particular. I want to know whether there are any better ways(not just CLI commands per se, any program or theoretical background would do) to look at it.

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• TP-Link TL-WA701N not working good as wireless extender

  - by djechelon

  I bought the device in subject to extend the range of my WPA2/PSK-protected wifi network powered by a TP-Link TL-WR340G device (AP+router). I configured it as follows: Operation mode: Universal Repeater MAC of AP: scanned my SSID and got it Channel width: 20MHz Security options: the same as the parent AP (WPA2/PSK with AES encryption) After configuration inSSIDer shows me two APs beaconing the same SSID at different SNRs (because I was with my laptop close to the extender). After a few hours my tablet, far from the parent AP, stopped working. I found that the scan reported two networks with the same SSID: one WPA-protected and one free at all. This happened very frequently. Rebooting the extender by unplugging it worked but this doesn't last long. Sometimes the extender stops transmitting at all, sometimes it beacons an open network to which nobody can connect (because there is no DHCP). What's wrong with my configuration?

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• Podcast Show Notes: The Red Room Interview &ndash; Part 2

  - by Bob Rhubart

  Room bloggers Sean Boiling, Richard Ward, and Mervin Chaing bring their in-the-trenches perspective to the conversation once again in this week’s edition of the OTN ArchBeat Podcast. Listen. (Missed last week? No problemo: Listen to Part 1) In this segment the conversation turns to SOA governance and balancing the need for reuse against the need for speed.  It’s no mystery that many people react to the term “SOA Governance” in much the same way as they would to the sound of Darth Vader’s respirator. But Mervin explains how a simple change in terminology can go a long way toward lowering blood pressure. Those interested in connecting with Sean, Richard, or Mervin can do so via the links listed below: Sean Boiling - Sales Consulting Manager for Oracle Fusion Middleware LinkedIn | Twitter | Blog Richard Ward - SOA Channel Development Manager at Oracle LinkedIn | Blog Mervin Chiang - Consulting Principal at Leonardo Consulting LinkedIn | Twitter | Blog And you’ll find the complete list of the Red Room SOA Best Practice Posts in last week’s show notes. The third and final segment of the Red Room series runs next week.  I have enough material from the original interview for a fourth program,  but it’ll have to wait. Also, as mentioned last week, the podcast name change is now complete, from Arch2Arch, to ArchBeat. As WPBH-TV9 weatherman Phil Connors says, “Anything different is good.”   Technorati Tags: archbeat,podcast. arch2arch,soa,soa governance,oracle,otn Flickr Tags: archbeat,podcast. arch2arch,soa,soa governance,oracle,otn

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• DNS and DHCP not agreeing on an IP address

  - by Mr. Jefferson

  I'm having a problem where our Windows Server 2003 domain controller assigns my Windows 7 computer one IP address (x.x.x.75) via DHCP, but reports another (x.x.x.84) via DNS. This causes some interesting behavior on the network. If I change my adapter settings to get IP and DNS addresses from DHCP, I can access the internet, but no one on our network can access my computer. If I change my IP manually to what DNS says it is, I lose my internet access, but everyone can get to my computer again. I know that we have some old, invalid reverse DNS pointers hanging around (a reverse lookup on an IP address often gives more than one result, usually not including the one that is correct), so that could be contributing, but my problem is recent, and the invalid reverse pointers have been around a long time. What's going on, and how do I fix it?

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• Sync custom AD properties to SharePoint Profile

  - by KunaalKapoor

  Here are some step-by-step instructions regarding configuring SharePoint to sync with custom AD attributes:Add the custom attribute in Active DirectoryThis part will have to be your doing; here is some documentation regarding creating customattributes in AD:http://msdn.microsoft.com/en-us/library/ms675085(VS.85).aspxhttp://technet.microsoft.com/en-us/magazine/2008.05.schema.aspxhttp://blogs.technet.com/b/isingh/archive/2007/02/18/adding-custom-attributes-in-active-directory.aspx2. Open up the miisclient.exe (C:\Program Files\Microsoft Office Servers\14.0\Synchronization Service\UIShell\miisclient.exe)a. This will have to be opened up with the farm admin account3. Click on "Management Agents" in the ribbon4. Right-click the Active Directory Management Agent ("MOSS-<name of sync connection>") and click "Refresh Schema"a. When prompted, enter the credentials for the farm account5. Once complete, close out of miisclient.exe6. Go into Central Admin --> Application Management --> Manage Service Applications --> Go into the User Profile Service Application7. Click on "Manage User Properties"8. Click on "New Property"9. Put in the correct information regarding the attribute that was created10. At the bottom of this page, under the "Source Data Connection" drop down, select the AD synchronization connection you have already configured11. For the "Attribute" drop down, select the new attribute you have created12. For the "Direction" drop down, select "Import"13. Click "OK"14. Run a full synchronization for the user profile service application and the custom property will get synced (as long as the attribute is set in Active Directory for the desired users)

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• Correct way to treat iptables init failure?

  - by chris_l

  Hi, I'm initializing my iptables rules via /etc/network/if-pre-up.d/iptables, using iptables-restore. This works fine, but I'm a bit worried about what would happen, if that script failed for some reason (maybe the saved iptables file is corrupt or whatever). In case the script failed, I'd like to: Start up my network interfaces without any iptables rules Start up OpenSSH server But not any other services like web server, ... (and maybe stop running instances) Is there a good canonical way to do that? Going into a lower init stage? - I haven't done that in a long time, and I think a lot about init has changed in recent years (?) - which stage should I drop to, and would the OpenSSH server and my network interfaces still run? Thanks Chris (On Debian Lenny)

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• Will increasing RAM improve Lightroom 3 large tiff loading times

  - by andy

  Set up: mid 2009 17" unibody MacBook Pro 4GB RAM 2.66 Core 2 Duo Snow Leopard 10.6.6 Lightroom 3 When working with 12 MegaPixel RAW files from a Nikon D700, no problem. Lightroom is fine. Recently I've been scanning film and they result in large tiff files, about 130mb each. The tiff files themselves are good, and I'm happy with my scanning workflow. Working with these files in Lightroom is perfectly fine, except for one step. When I choose one of these photos in the Develop module, Lightroom displays the "Loading" on the image for about a minute or two, which is quite long. Once the image is loaded, then everything is fine again, and applying effects is instant. So my only issue is reducing that "loading" time in the develop module (the library module is fine too). Will increasing my RAM to 8GB help? I'm worried about spending the money and it not making any difference. thanks andy

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• Where is Amazon Linux AMI Test Page EC2?

  - by fuzzybee

  I have set up my websites as directories directly under /var/www/html/ and they are working just fine (the websites are mapped to virtual hosts). So, this is mainly out of curiosity for the moment. Furthermore, being able to customise this might bring some benefits in the future e.g. branding the elastic IPs my computer use temporarily. Notes I can always create a index.html page under /var/www/html/ and modify it but that's not my goal here. I can also map the elastic IP address to a directory /var/www/html/default/ and do my stuffs there but that is not also my goal here My goal is the find the Amazon Linux AMI test page I've tried running Linux command to find it but it takes too long obviously

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• Book Review: Getting Started With Window 8 Apps By Ben Dewey

  - by Tim Murphy

  When O’Reilly gave me an opportunity to review this book I was excited.  It gave me a reason to finally put some time into this new platform and what developers will need to learn in order to be successful. This book by Ben Dewey is only 92 pages long, so if you were looking for an in-depth treatment of Windows 8 development you will need supplemental materials.  It is also due for an update from the perspective of recent changes made by Microsoft prior to the final release of the OS and tools.  This causes a few issues if you try to run the code samples because of namespace changes. I was encouraged by the fact that the author didn’t do the typical “hello world” app.  He uses a lot of pattern based development techniques and hits many of the main topics including: Application lifecycle Charms integration Tiles Sensors The lifecycle is critical for anyone who hasn’t done mobile development before.  Limited resources on these devices mean that the OS can suspend or kill your app altogether if it decides it needs to.  He covers tombstoning which is the key to Windows 8 and Windows Phone lifecycle management. He also dedicates a chapter to marketing and distributing the application you build.  From my experience with Windows Phone development this is crucial information.  You need to know how to test your application so that it is going to pass certification and present your app so that it is going to get noticed amongst thousands of other apps. The main things that I wish had been in the book explanations of more of the common controls and more complete explanation of patterns that were implemented. In the end this book is a good foundation getting exposure to the concepts that underlie this new version of the Windows platform and how it effects developers.  It isn’t a book that I would suggest for someone just getting into development with no understanding of pattern based development. del.icio.us Tags: Windows 8,O'Reilly,Ben Dewey,Book Review,Review

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• Growing Into Enterprise Architecture

  - by pat.shepherd

  I am writing this post as I am in an Enterprise Architecture class, specifically on the Oracle Enterprise Architecture Framework (OEAF).  I have been a long believer that SOA’s key strength is that it is the first IT approach that blends or unifies business and technology.  That is a common view and is certainly valid but is not completely true (or at least accurate).  As my personal view of EA is growing, I realize more than ever that doing EA is FAR MORE than creating a reference architecture, creating a physical architecture or picking a technology to standardize on.  Those are parts of the puzzle but not the whole puzzle by any stretch. I am now a firm believer that the various EA frameworks out there provide the rigor and structure required to allow the bridging of business strategy / vision to IT strategy / vision. The flow goes something like this: Business Strategy –> Business / Application / Information / Technology Architecture –> SOA Reference Architecture –> SOA Functional Architecture.  Governance is imbued throughout to help map, measure and verify the business-to-IT coherence. With those in place, then (and only then) can SOA fulfill it’s potential to be more that an integration strategy, more than a reuse strategy; but also a foundation for tying the results of IT to business vision. Fortunately, EA is a an ongoing process that it is never too late to get started with an understanding of frameworks such as TOGAF, FEA, or OEAF.  Also, EA is never ending in that it always needs to be apply, even once a full-blown Enterprise Architecture is established it needs to be constantly evolved.  For those who are getting deeper into EA as a discipline, there is plenty runway to grow as your company/customer begins to look more seriously at EA. I will close with a pointer to a Great Book I have recently read on this subject: Enterprise Architecture as Strategy (http://www.amazon.com/Enterprise-Architecture-Strategy-Foundation-Execution/dp/1591398398/ref=sr_1_1?ie=UTF8&s=books&qid=1268842865&sr=1-1)

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• Sevensteps and I are joining forces

  - by Dennis Vroegop

  As of today, I will be partnering with Sevensteps when it comes to developing great Surface, Windows Phone 7 and Windows 7 Touch applications. Below you’ll find the press release we sent out today. I am looking forward to this partnership and expect great things coming from us both in the future!   Dennis Vroegop, Microsoft MVP, joins Sevensteps partner network 1 March 2011, Seattle / Amersfoort Today Dennis Vroegop and Bart Roozendaal, both Microsoft Most Valuable Professional for Microsoft Surface, announce the joining of Dennis Vroegop to the Sevensteps partner network. Dennis and Bart already worked together very closely through the Microsoft MVP connection, but decided to combined their efforts to make the new Microsoft Surface and our solutions for it, a success. Dennis will join the other Sevensteps partners in creating state of the art solutions for Microsoft Surface, Windows Phone 7 and Windows 7 Touch. Dennis brings a vast amount of knowledge about these technologies, as well as his network in the Dutch developer community. With Dennis joining the Sevensteps partner network we bring unique expertise, power and insight in the platforms, that no other company worldwide can offer. This step brings our goal of Sevensteps being the knowledge hub for Microsoft Surface of choice a whole lot closer. About Dennis Vroegop Dennis is a Microsoft MVP for Microsoft Surface and chairman of the Dutch dotNed user group. He has a long history promoting Microsoft Surface in the developer community. Dennis is a regular speaker at local and international conferences and a frequent writer of articles, including but not limited to Microsoft Surface. Dennis has a bachelor’s degree in computer sciences and has spent all of his professional life writing software for the Microsoft platform. About Sevensteps For more information about Sevensteps and Bart Roozendaal please point to http://www.sevensteps.com Tags: surface,wp7,windows touch

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