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• dns update frequency

  - by Roderik

  I was looking after the frequency of dns updates, since I had to change the location fo the vps that hosts the domain contents. What I ussualy read is that it takes up to 72 hours to get these changes propagated, sometimes this can be sooner based on your location. I changed the nameservers for the domain vasco-da-gama.nl about a week ago. When I ping the domain name from different locations it still points the old vps (which does not exist anymore). I was wondering if its normal that it can take this long for the change to point my new vps? If I might have done something wrong here, where should I look for it (it looks all ok, when I check it). If it is reachable from your location (if so, its probably a matter of time it will propagate to my location).

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• Text Terminal Hardware (for Linux)

  - by DLH

  Is there any way to obtain a hardware text terminal (preferably small in size) with a screen and a keypad to connect to a Linux machine (preferably via usb)? I'd like to be able to log into a command line and do some work there while simultaneously running a graphical environment on the main display. It seems like there should be some kind of lcd screen and qwerty keypad device designed for this purpose. Does this exist, and how do I get one? Edit: I'd be happy with a small networked device as well, as long as I could get a remote terminal into my computer.

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• Tool to annotate pictures (screenshots) for documentation purposes?

  - by René Nyffenegger

  Long time ago, I saw someone use a software (on Windows) that was specifically created to annotate pictures. It made it simple to add arrows, boxes, circles in "outstanding" colors to the image. Unfortunatly, I don't remember what program that was. Now, I have to document a GUI and I'd like to use this software in order to annotate screenshots of the software so that I can show the order of flow and dependencies between various aspects of the GUI. I'd be very happy if someone could point me into the right direction.

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• Fatal error on "mode 120000" file during git -> svn migration

  - by Oliver

  Following instructions from the following website: http://code.google.com/p/support/wiki/ImportingFromGit I'm trying to migrate a git repository to svn, but during the "git rebase master tmp" step it fails with the following error after apply the first few patches: $ git rebase master tmp First, rewinding head to replay your work on top of it... Applying: Imported Applying: Cleaned up the readme file Applying: fix problem with versions fatal: unable to write file foobar mode 120000 Patch failed at 0003 fix problem with versions When you have resolved this problem run "git rebase --continue". If you would prefer to skip this patch, instead run "git rebase --skip". To restore the original branch and stop rebasing run "git rebase --abort". I understand that 120000 may refer to a symlink, but Subversion has supported symlinks for a long time now. Subversion installed is 1.6.5, Git is 1.6.3.3. Running on Ubuntu Linux. The system is not running out of disk space and this operation is taking place within my home directory so permissions should not be an issue.

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• Role of systems in entity systems architecture

  - by bio595

  I've been reading a lot about entity components and systems and have thought that the idea of an entity just being an ID is quite interesting. However I don't know how this completely works with the components aspect or the systems aspect. A component is just a data object managed by some relevant system. A collision system uses some BoundsComponent together with a spatial data structure to determine if collisions have happened. All good so far, but what if multiple systems need access to the same component? Where should the data live? An input system could modify an entities BoundsComponent, but the physics system(s) need access to the same component as does some rendering system. Also, how are entities constructed? One of the advantages I've read so much about is flexibility in entity construction. Are systems intrinsically tied to a component? If I want to introduce some new component, do I also have to introduce a new system or modify an existing one? Another thing that I've read often is that the 'type' of an entity is inferred by what components it has. If my entity is just an id how can I know that my robot entity needs to be moved or rendered and thus modified by some system? Sorry for the long post (or at least it seems so from my phone screen)!

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• Allow and restrict remote sql server access

  - by Michel

  Hi, I want to expose my sql server instance via the internet. I've been programming asp.net to sql server for a long time, but for the first time i'm hosting the sql server myself instead of the clients server. So what i want to do is move my sql server from my dev machine at home to a virtual server (yet to hire). But of course i don't want anyone to just enter my sql server but just a few persons. So what i was thinking was to allow only a few ip addresses to the sql server instance. Can anyone tell me how i can expose my sql server to the internet and limit the access to the instance to only a few ip addresses? And ehm, if you know even better ways to secure it, i'd be happy, because this is the first time for me :) Michel

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• Advantage of using nexenta vs. OpenSolaris

  - by jotango

  I am currently building a NAS for about 24 TB of storage. Video files, slow access, long term storage. No performance issues. I am currently undecided between buying a JBOD case and installing OpenSolaris (because of ZFS), or purchasing a Nexenta license. The difference is about $ 12.500 for licenses over three years. What would you see as the main advantage in purchasing a nexenta license, beside the support? Did nexenta really enhance the basic OpenSolaris, or is it just a lot of marketing speak? No one really wanted to answer that question.

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• How&rsquo;s your Momma an&rsquo; them?

  - by Bill Jones Jr.

  When a Southern “boy” like me sees somebody that used to be, or should be, a close friend or relative that they haven’t seen in a long time, that’s a typical greeting.  Come to think of it, we were often related to close friends. So “back in the day”, we not only knew people but everybody close to them.  When I started driving, my Dad told me to always drive carefully in Polk county.  He said if I ran into anybody there, it was likely they would be related or close family friends. Not so much any more… the cities have gotten bigger and more people come south and stay.  One of the curses of air conditioning I guess. Anyway, it’s been a while.  So “How’s your Momma and them”?  Have you been waiting for me to blog again?  Too bad, I’m back anyway <smile>. Here in Charlotte we just had another great code camp.  The Enterprise Developers Guild is going strong, thanks to the help of a lot of dedicated people.  Mark Wilson, Brian Gough, Syl Walker, Ghayth Hilal, Alberto Botero, Dan Thyer, Jean Doiron, Matt Duffield all come to mind.  Plus all the regulars who volunteer for every special event we have. Brian Gough put on a successful SharePoint Saturday.  Rafael Salas and our friends at the local Pass SQL group had a great SQL Saturday.  Brian Hitney and Glen Gordon keep on doing their usual great job for developers in the southeast as our local Microsoft reps. Since my last post, I have the honor of being designated the INetA Membership Mentor for Georgia in addition to mentoring the groups in the Carolinas for the past several years.  Georgia could be a really good thing since my wife likes shopping in Atlanta, not to mention how much we both like Georgia in general.  As I recall, my Momma had people in Georgia.  Wonder how their “Mommas an’ them” are doing?   Bill J

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• Keep your Root Authorities up to date

  - by John Breakwell

  Originally posted on: http://geekswithblogs.net/Plumbersmate/archive/2013/06/20/keep-your-root-authorities-up-to-date.aspxBy default, Windows will automatically update it’s internal list of trusted root authorities as long as the Update Root Certificates function is installed. This should be enabled by default and takes manual intervention to remove it. With this component enabled, the following happens: If you are presented with a certificate issued by an untrusted root authority, your computer will contact the Windows Update Web site to see if Microsoft has added the CA to its list of trusted authorities. If it has been added to the Microsoft list of trusted authorities, its certificate will automatically be added to your trusted certificate store. If the component is not installed and a certificate from an untrusted CA is encountered then the following text will be seen: This is an inconvenience for the person browsing the site as they need to click to continue. Applications, though, will be unable to proceed and will throw an exception. Example: ERROR_WINHTTP_SECURE_FAILURE 12175 (0x00002F8F) One or more errors were found in the Secure Sockets Layer (SSL) certificate sent by the server. If you look at the certificate’s properties, you can see the “Issued by:” value:   This must match a Trusted Root Certificate Authority in the current user’s certificate store.   So turn on automatic updating of trusted root authority certificates. For Windows Vista and above, this option is controlled through Group Policy. See the “To Turn Off the Update Root Certificates Feature by Using Group Policy” section of the following Technet article: Certificate Support and Resulting Internet Communication in Windows Vista If Windows Update is a blocked site then download and deploy the latest pack of root certificates from Microsoft: Update for Root Certificates For Windows XP [May 2013] (KB931125)   Failing that, find a machine that has the latest root certificates installed and export them from there: Open up the Certificates console. Right-click the required Trusted Root Certificate Authority certificate Choose Export from “All Tasks” to open up the Certificate Export Wizard Choose an export file format – DER should be fine Provide a file name and complete the export. Move the file to the machine that’s missing the certificate Right-click the file and choose “Install Certificate” to open up the Certificate Import Wizard Allow the wizard to automatically select the certificate store and complete the import On a side note, for troubleshooting certificate issues it can be helpful to clear the SSL state:

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• How to install mod_wsgi 3.1 on Ubuntu 9.10

  - by pthulin

  I have a Python 3 web app so mod_wsgi < 3.1 doesn't cut it for me. However, on my Ubuntu 9.10 installation there doesn't seem to be a package for mod_wsgi 3.1. Is there an alternative repository that has a package for mod_wsgi 3.1? There's a new Ubuntu release not so long from now, will it contain mod_wsgi 3.1? Some other distro ready with mod_wsgi 3.1 to recommend? Maybe my best bet is to compile it myself? From a quick google it looks like I only need the python and apache dev packages installed. Thanks!

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• new monitor won't work on win3.1

  - by Rick Workover

  My old system monitor for my Windows 3.1 machine failed and the new flat screen has a sync error. The new monitors do not support the refresh/screen size it is set to. It boots up into Windows and the monitor is blank with a sync error. Without Windows 3.1 working I don't know how to change the refresh/size to get it to work. I haven't used Win3.1 in so long that I can't remember how to fix this. So, how do I reset the refresh rate and screen resolution it is set to, without being able to actually see anything?

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• Graphics card failure, anything I could try...

  - by ILMV

  My gaming PC has decided to die, it's not the first time but usually a quick ATX reset brings it back to life. Today it didn't. I disconnect all unessasary devices so I've only got the case button / LED cables, GPU, CPU, RAM and power connected, the computer still didn't turn on. I've not got a speaker on my motherboard so found a spare one I have for testing and when the machine starts up I get one long beep and two short beeps from my Award BIOS, which apparently means a video card error. I change it with the GPU from another machine and all works well. Q: So I have a faulty graphics card (an nVidia 8800GT OC), is there anything I can try to resurect it?

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• Guide to the web development ecosystem

  - by acjohnson55

  I'm a long-time software developer, and I've been thrown in the deep, deep end of developing from the ground up what will hopefully be a highly scalable and interactive web application. I've been out of the web game for about 8 years, and even when I was last in it, I wasn't exactly on the cutting edge. I think I've made judicious design decisions and I'm quite happy with the progress I've been making so far, but new, hot web technologies keep crawling out of the woodwork and into my headspace, forcing me to continually revalidate my implementation decisions. Complicating things even further is the preponderance of out-of-date information and the difficulty of knowing what is out of date in the first place. What I'm wondering is, are there any comprehensive books or guides dedicated to compiling and comparing the technologies out there, end-to-end in the web application stack? I'm happy to learn new techs on demand, but I don't like learning about them after I've already spent time going in another direction. I'm looking for the sort of executive info a CTO might read to make sure the best architectural decisions are being made. And just to be clear, this is a question about resources, not about specific technology suggestions.

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• Organizing Connections with Folders in Oracle SQL Developer

  - by thatjeffsmith

  How many Oracle databases do you work with on a regular basis? I’m guessing the answer for most of you lies between 1 and 500. This post is really geared for those of you who deal with more than just a handful (5) of database connections. Filters are nice when you need to work with a subset of table data, or even a list of tables. So why wouldn’t they be just as useful for organizing your connections? Here’s my complete list of databases: The folders aren’t there by default, you add them as you need them. Now this isn’t an overly large connection list. But when I need to fire up an impromptu demo for a customer, it’s very nice to be able to drill down into JUST those ‘safe’ environments. This actually saves me a few seconds every time I need to connect to one of my databases. So while it’s a very simple feature, it’s one of those things that I recommend EVERYONE take advantage of as it will save them hours of time over the long haul. Easier to find means I get to work a few seconds faster. This also helps me from making mistakes in ‘production’ environments! How to Add a Connection Folder Select a connection you want to organize. Mouse-right-click, and choose ‘Add to folder.’ You can throw it into a new container or an existing one. Lather, rinse, and repeat as necessary. The only trick is remembering to right-click! Special thanks to @dresendi for today’s topic! He asked how to do this and I realized I hadn’t blogged the topic yet

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• Growing mobile developers inside a web development org

  - by Arkaaito

  I work for a "mature web startup" as a web developer (mainly using PHP). Our main site has about 8 million registered members at the moment. However, the site is basically impossible to use on anything that's not a real computer. One of our most-requested features, if not the most requested, is a mobile app or mobile version of the site. I think we need to do it. Management thinks we need to do it. In fact, everyone in the company thinks we need to do it. But it's nigh impossible to hire someone with iPhone/Android skills in the present market. I'm the only person at the company with any level of mobile development experience currently, and I'm not that good (yet), so I'm seeking comments on how to bootstrap a capacity for mobile development. Anything from general tips (should I focus on developing my personal skills first or try to pick up a more experienced mobile dev?) to specific recommendations on training, etc., may be helpful, as long as it doesn't reduce to "sucks to be you." :-)

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• Linux/bsd tcp load balancing with 10 gigabit ethernet

  - by user37899

  Okay, I've been looking at layer 4 load balancing solutions for 10 gigabit links. I need the following properties Works at 10Gig ethernet speeds. Can support long live tcp connections. up to 1mil live tcp connections. Balancer not involved in the return path. Fault tolerant with tcp session fail over. low latency and good through put. can be scripted. Either a software or hardware solution. Can it be done? Anyone doing this?

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• Intel turbo boost - in reality

  - by gisek

  I have an Intel i7-3630QM processor in my laptop. Its speed is supposed to be from 2.4 to 3.4 GHz in turbo boost mode. In reality, will it ever run all cores on full speed (3.4GHz mentioned above) at the same time? I heard somewhere that this additional 1GHz is shared between all cores in laptops. If the boost is 1GHz per core it's pretty impressive (over 40% speed up). What does it really look like? How long can a processor run in turbo mode?

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• How can I better implement A star algorithm with a very large set of nodes?

  - by Stephen

  I'm making a game with nodejs in which many enemies must converge on the player as the player moves around a relatively open space (right now it is an open field with few obstacles, but eventually there may be some small buildings in the field with 1 or 2 rooms). It's a multiplayer game using websockets, so the server needs to keep track of enemies and players. I found this javascript A* library which I've modified to be used on the server as a nodejs module. The library utilizes a Binary Heap to track the nodes for the algorithm, so it should be pretty fast (and indeed, with a small grid, say 100x100 it is lightning fast). The problem is that my game is not really tile-based. As the player moves around the map, he is moving on a more or less 1-to-1 per-pixel coordinate system (the player can move in 8 directions, 1 or 2 pixels at a time). In preliminary tests, on an 800x600 field, the path-finding can take anywhere from 400 to 1000 ms. Multiply that by 10 enemies and the game starts to get pretty choppy. I have already set it up so that each enemy will only do a path-finding call once per second or even as slow as once every 2 seconds (they have to keep updating their path because the players can move freely). But even with this long interval, there are noticeable lag spikes or chops every couple of seconds as the enemies update their paths. I'm willing to approach the problem of path-finding differently, if there's another option. I'm assuming that the real problem is the enormous grid (800x600). It also occurs to me that maybe the large arrays are to blame, as I've read that V8 has trouble with large arrays.

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• Can my email address be revoked? [closed]

  - by Name

  I did some work with an organization and had a falling out, so I left them. They used postfix to have [email protected], and I had one. I set up gmail to get my mail via POP as well as to "send mail as @_.com". I think for a long time they forgot to delete my email address and now it seems that I can send but not receive mail at the address. What could a possible explanation for this be? Can they revoke delivery but not sending from the address? Why would they only revoke one if they cna revoke both? Is it more tedious or difficult a task to revoke sending? Thanks

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• Windows 7 x64 how to verify integrity of ALL files on an NTFS disk?

  - by kilves76

  Looking for a tool that would verify integrity of ALL files on a Windows 7 x64 NTFS disk reliably? This is for testing of experimental defrag software, so it really needs to be secure and foolproof. I know it will take a long time, there's millions of files on the disk, but safety just cannot be compromised in a situation like this. Freeware solution much preferred. Can be either Windows software (=inducing pitfalls about files changing due to booting Windows) or a stand alone boot (for example linux boot cd + usb key for storing chksum/metadata).

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• SQL SERVER – First Month as DBA Trainee – Disasters and Recovery

  - by pinaldave

  This blog post is written in response to the T-SQL Tuesday hosted by Allen Kinsel. He has selected very interesting subject for T-SQL Tuesday – Disaster and Recovery. This subject took me in past – my past. There were various things, I had done or proposed when I started very first month as a DBA trainee. I was tagged along with very senior DBA in my organization who always protected me or correct my mistake. He was great guy and totally understand the young mind of over-enthusiastic Trainee DBA. I respect him very much. Here are few things which I had learned in my very first month (not necessarily I have practices them on production). Never compress (zip) native backup using any tools, when disaster happen sometime the extra time to un-compress the database can be too long and not acceptable for business SLA Do not truncate logs After restoring full database backup – only restore latest differential back, no need to restore all the backup Always write WHERE condition when deleting and updating Sr. DBA always advised me – always keep your résumé ready and car ready – you never know when you can not recover disaster! Well for sure it was a joke. Today’s T-SQL Tuesday remind me of my very first month as DBA trainee. Reference: Pinal Dave (http://blog.SQLAuthority.com) Filed under: About Me, Best Practices, Pinal Dave, PostADay, SQL, SQL Authority, SQL Query, SQL Server, SQL Tips and Tricks, T SQL, Technology

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• vncserver too many security failures

  - by cf16

  I try to connect to my vncserver running on CentOs from home computer, behind firewall. I have installed Win7 and Ubuntu both on this machine. I have an error: VNC conenction failed: vncserver too many security failures even when loging with right credentials (I reset passwd on CentOs). Is it something regarding that I try as root? I think important is also that I have to login to remote Centos through port 6050 - none else port works for me. Do I have to do something with other ports? I see that vncserver is listening on 5901, 5902 if another added - and I consider connection is established because from time to time (long time) the passwd prompt appears,... right? please help, what to do? even if prompt appeared and I put correct password I get: authentication failure. how to disable this lockout for a testing purposes?

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• Which mail clients can give reminders about unresponded emails?

  - by ulidtko

  In my daily e-mail often happens the following scenario: I send somebody an email which describes some problem and requests an action from the recipient. Typically, I wish to ensure that this action was taken, or at least somehow resolved; when this happens, the email recipient should notify me with a response email about what was done, and what was not and why. But, sometimes emails don't get read by the recipient, or he forgets to reply to me. At the same time, I cannot constantly keep in memory the list of all emails for which I was waiting an answer and still didn't receive it. So I wonder, is there in any email client such a feature which would allow me to somehow mark specific outgoing emails as "demanding reply"? The mail client could in this case notify me if any "demanding reply" emails still aren't replied for a long time.

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• Rebuilding /etc/rc?.d/ links

  - by timday

  A regular filesystem check on a Debian Lenny system triggered an fsck, and that nuked a handful of links in the /etc/rc?.d hierarchy (unfortunately I didn't keep a list). The system seems to boot and run normally, but I'm worried its storing up trouble for the future. Is there an easy (fairly automatic) way of rebuilding this piece of the system ? As I understand it, the links are generally manipulated by package postinst scripts using update-rc.d (and I haven't made any changes from the installed defaults). Without any better ideas, my plan is one of: Diff a listing with another similar system to identify which packages need their links repairing. Wait until the system is upgraded to Squeeze (hopefully not too long :^) and assume the mass package upgrade will restore all the missing links.

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• Reminders about unresponded emails?

  - by ulidtko

  In my daily e-mail often happens the following scenario: I send somebody an email which describes some problem and requests an action from the recipient. Typically, I wish to ensure that this action was taken, or at least somehow resolved; when this happens, the email recipient should notify me with a response email about what was done, and what was not and why. But, sometimes emails don't get read by the recipient, or he forgets to reply to me. At the same time, I cannot constantly keep in memory the list of all emails for which I was waiting an answer and still didn't receive it. So I wonder, is there in any email client such a feature which would allow me to somehow mark specific outgoing emails as "demanding reply"? The mail client could in this case notify me if any "demanding reply" emails still aren't replied for a long time.

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