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• AutoSSH for a robust tunnel

  - by Budric

  I'm trying to start an ssh tunnel from A to B and have it run despite things like: period network/wifi drops on A and remote server reboot on B. My ssh tunnel starts using upstart script on A with event start on (net-device-up IFACE=eth0) I've found autossh which is supposed to handle these kinds of things, but had some trouble getting it to work. The upstart executes: autossh -M 0 -2qTN -o "ServerAliveInterval 30" -o "ServerAliveCountMax 2" -L 5678:somehost:5678 user@B However when I log into B and kill -9 that tunnel session, autossh just exits with "Connection to B closed by remote host." That's not what I expected autossh to do. Any advice on how to set this up? Any GUI service monitoring utilities out there that essentially display a green light if a service is up? Thanks.

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• proper way to uninstall ubuntu server

  - by user314187

  I have installed ubuntu server on Widows 8.1 Hyper-V virtual machine. As part of learning I just want to remove the ubuntu server completely sothat I can reinstall the server once again to get a better understanding on the installation process. If I delete the Virtual Machine (By remove option in Hyper - V) I am able to delete the server and the hard disc where the server is installed. But, Using this process my Host OS Windows 8.1 is getting corrupted and had to reinstall the Windows OS (Tried this 3 times already). Can someone please tell me the right way of uninstalling the ubuntu server from the Hyper-V virtual machine. Thanks, Uday

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• What are the best social places for programmers to interact?

  - by Chevex

  I know this is not really the right place for this type of question, but I figure it will get me started and hopefully won't be closed right off the bat. I love the programming industry a lot, but I don't have many colleagues that aren't introverted and/or anti-social, or self-centered. What are some good places online to find programming friends that I could share my adventures with? I love stack overflow but it is more technical and doesn't really allow you to put up a personal project just for people to see and critique. Any suggestions? A good forum would be great! The only ones I can find are usually full of inexperienced people who just "want" to be a programmer. I'm looking more for a place who's members are already programmers discussing programming topics.

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• Ouya build experiencing odd graphical artifacts, screen half black

  - by Neeko

  I'm witnessing very odd graphical artifacts when I run my Unity game on Ouya. After the Unity splash screen, the game loads with the screen half black. This seemingly has started occurring out of the blue. It also doesn't occur in the editor or the standalone build, only on Ouya. I can't think of a single reason why this would be happening. If I open the Ouya menu screen and close it, the game returns to normal; somewhat, as there may be some artifacts lingering but the screen isn't half black like in the screen shot above. I know there's not much to go off of, but any insight into why this may be happening is greatly appreciated.

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• Setting up Oracle Linux 6 with public-yum for all updates

  - by wcoekaer

  I just wanted to give you a quick example on how to get started with Oracle Linux 6 and start using the updates we published on http://public-yum.oracle.com. Download Oracle Linux (without the requirement of a support subscription) from http://edelivery.oracle.com/linux. Install Oracle Linux from the ISO or DVD image Log in as user root Download the yum repo file from http://public-yum.oracle.com # cd /etc/yum.repos.d # wget http://public-yum.oracle.com/public-yum-ol6.repo If you want, you can edit the repo file and enable other repositories, I enabled [ol6_UEK_latest] by just setting enabled=1 in the file with a text editor. Run yum repolist to show the registered channels and you see we are including everything including the latest published RPMs. Now you can just run yum update and any time we release new security errata or bugfix errata for OL6, they will be posted and you will automatically get them. It's very easy, very convenient and actually very cool. We do a lot more than just build OL RPMs and distribute them, we have a very comprehensive test farm where we test the packages extensively.

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• ORA - 01033 Error in Java

  - by user1721921

  Today I am getting below error in J2EE application: java.sql.SQLException: ORA-01033: ORACLE initialization or shutdown in progress at java.lang.Throwable.<init>(Throwable.java) at java.lang.Throwable.<init>(Throwable.java) at java.sql.SQLException.<init>(SQLException.java:53) at oracle.jdbc.dbaccess.DBError.throwSqlException(DBError.java:134) at oracle.jdbc.ttc7.TTIoer.processError(TTIoer.java:289) at oracle.jdbc.ttc7.O3log.receive1st(O3log.java:408) at oracle.jdbc.ttc7.TTC7Protocol.logon(TTC7Protocol.java:260) at oracle.jdbc.driver.OracleConnection.<init>(OracleConnection.java:365) at oracle.jdbc.driver.OracleDriver.getConnectionInstance(OracleDriver.java:547) at oracle.jdbc.driver.OracleDriver.connect(OracleDriver.java:347) at oracle.jdbc.pool.OracleDataSource.getConnection(OracleDataSource.java:169) at oracle.jdbc.pool.OracleConnectionPoolDataSource.getPhysicalConnection(OracleConnectionPoolDataSource.java:149) at oracle.jdbc.pool.OracleConnectionPoolDataSource.getPooledConnection(OracleConnectionPoolDataSource.java:95) Can someone please let me know what does that error mean?

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• Automatically analyze excel files

  - by dole doug

  I have to replicate a manual generation of a large number of excel files. I started to manually track the relations between cells ( files, formulas, etc). I also had a talk with the person which generates those files. For now I have a general understanding about how the excel files are generated, but "devil is in the details". I assume that I can write a script which will generate the hierarchy between cells and files, but this might require the same effort as manually noticing the relations. Also, I'm afraid that I'm not too experienced and my app is more prone to error approach than a manual analyze. How to handle this problem? Do you know about an open source project which analyze the excel files in a recursive mode following the formulas ?

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• restoring grub when Windows 7 MBR lost it

  - by Trent Hall

  My dual boot desktop was running only Windows 7 until it crashed on a windows update. Couldn't get it started again even after all the usual things that might fix it, so I installed Ubuntu 12.04, which has worked very well. unfortunately Carbonite doesn't run on Linux yet, and so I called Microsoft support to see if we could be Windows 7 up and running. Their attempts to get Windows 7 running resulted in writing a new MBR for windows, which failed and also somehow caused the loss of ability to boot into Ubuntu also. How can I get back to Ubuntu? I don't want to lose my settings in Ubuntu. Thanks... Trent

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• Great Presentation to the Israel Dot Net Developers User Group (IDNDUG)

  I continue to be impressed with the quality of .NET Developers in Israel.. we had a full house last night for a 2+ hour presentation on building business applications with Silverlight and RIA Services.   The audience was very engaged and had lots of good, relevant questions which created a really good conversation.    Check out the slides and demo. I started off by demoing the Right-to-Left text support for Hebrew that is baked in as part of Silverlight 4.   ...Did you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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• Firefox profile issue

  - by vooda gopal

  Is there any limit in the number of firefox profiles that can be created? My issue is I am currently doing selenium webdriver automation in linux for a device. There are 50 devices of same kind and framework will pickup a device depending on availability. I need to by pass unsigned ssl pages. I am using firefox 14. I have implemented following but it is not consistent. everytime a device is chosen adds cer of device to the cert file in firefox profile but I am getting sec_error_bad_signature very frequently. So I started recreating cert [delete and create if by opening firefox] file for every run. Now this is posing a problem if multiple devices are run at the same time. Hence I want to create separate firefox profile

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• Cyclic Dependencies.

  - by PhilCK

  Are cyclic dependencies a common thing in games dev? I ask as I keep getting into situation where I'm using and have been told more than once that they should be avoided. I am wondering if this is just a what people say as a general rule of thumb in the software development business. and that the nature of game programming produces such dependencies. // Foo #include <Bar.hpp> class Foo { bar& m_bar; }; and // Bar class Foo; class Bar { Foo* m_foo; }; I do this alot in Ruby, but dynamic languages are more forgiving in this instance, where as static ones, not so much.

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• SQL SERVER – Enable PowerPivot Plugin in Excel

  - by pinaldave

  Recently I had interesting experience at one conference. My PowerPivot plugin got disabled and I had no clue how to enable the same. After while, I figured out how to enable the same. Once I got back from the event, I searched online and realize that many other people online are facing the same problem. Here is how I solved the problem. When I started Excel it did not load PowerPivot plugin. I found in option>> Add in the plug in to be disabled. I enabled the plugin and it worked very well. Let us see that with images. Reference: Pinal Dave (http://blog.SQLAuthority.com) Filed under: Pinal Dave, PostADay, SQL, SQL Authority, SQL Query, SQL Server, SQL Tips and Tricks, T SQL, Technology Tagged: PowerPivot

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• cPanel email doesn't seem to work - error 550?

  - by Megh

  I am fairly new to the web hosting game, so bear with me :) Recently set up a VPS with cPanel and WHM. Everything is going well so far, I've created a user domain and transferred my website there, managed a couple of databases with phpmyadmin, everything was going great until I started messing around with email. I made an email account [email protected] through cPanel, although when I try and email this address I get the following error: Technical details of permanent failure: Google tried to deliver your message, but it was rejected by the recipient domain. We recommend contacting the other email provider for further information about the cause of this error. The error that the other server returned was: 550 550 Unknown user (state 13) Quite unsure of what to do next, in all honesty.

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• How do I efficiently code both the client and server at the same time?

  - by liamzebedee

  I'm coding my game using a client-server model. When playing on singleplayer, the game starts a local server, and interacts with it just like a remote server (multiplayer). I have done this to avoid coding separate singleplayer and multiplayer code. I have just started coding and have encountered a major problem. Currently I'm developing the game in Eclipse, having all the game classes organized into packages. Then, in my server code, I just use all the classes in the client packages. The problem is, these client classes have variables that are specific to rendering, which obviously wouldn't be performed on a server. Should I create modified versions of the client classes to use in the server? Or should I just modify the client classes with a boolean, to indicate if its the client/server using it. Are there any other options I have? I just had a thought about maybe using the server class as the core class, then extending it with rendering stuff?

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• How can I let prospective employers know I'm a great developer?

  - by Zoe Gagnon

  I've recently read through Joel's guide to finding great developers (http://www.joelonsoftware.com/articles/FindingGreatDevelopers.html), and I feel really strongly that I am smart and get things done. The problem is, I didn't learn how to get things done until about halfway through college, so my GPA is less than stellar. Additionally, I've got a few other things going against me: late into the job market (~30), no internship, state college instead of university, and when I graduated, I pretty much had to take the first job that offered. With all of these things piled together, my resume (the first step to getting a job), is not terribly impressive. What can I do to let people know that I'm a great developer and would complement the best companies in the world?

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• Car Modelling for race game

  - by Mert Toka

  I am taking Computer Graphics course this semester and we have a video game competition. I am making racing game with simulated dynamics. Our professor told us that we don't have to do much of a modelling but since we haven't started the gaming part and since I have free time I want to model the car. My question is firstly which software do you recommend to design game components? I know Maya right now. Secondly, if I design the car or any other part, what should its polygon count in order to run game smoothly? I can design pretty much everything but I assume that it is hard to design low-poly models.

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• Visual Studio 2010 Short Cut Links!

  - by Dave Noderer

  This week Scott Cate came to South Florida and gave a great talk on his Visual Studio shortcuts and how he uses them. You can find a collection of short video’s he has done at: http://scottcate.com/tricks/ Also you might want to check out Sara Ford’s blog: http://blogs.msdn.com/saraford/default.aspx, she started doing a tip a day but has many more now. Scott covers many of these in the videos. And.. as with past releases, the languages team has provided PDF’s with a lot of keyboard shortcuts, this time for VB, C#, F# and C++. You can find downloads for all of these at the top of the FlaDotNet.com page and are included below: VB: http://www.fladotnet.com/downloads/VS2010VB.pdf C#: http://www.fladotnet.com/downloads/VS2010CSharp.pdf F#: http://www.fladotnet.com/downloads/VS2010FSharp.pdf C++: http://www.fladotnet.com/downloads/VS2010CPP.pdf Happy Keyboarding!!

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• Good Practices for writing large (team/solo) projects (In C)

  - by Moshe Magnes

  Since I started learning C a few years ago, I have never been a part of a team that worked on a project. Im very interested to know what are the best practices for writing large projects in C. One of the things i want to know, is when (not how) do I split my project into different source files. My previous experience is with writing a header-source duo (the functions defined in the header are written in the source). I want to know what are the best practices for splitting a project, and some pointers on important things when writing a project as part of a team.

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• Apress Deal of the day - 23/Feb/2011 - Ultra-Fast ASP.NET: Building Ultra-Fast and Ultra-Scalable Websites Using ASP.NET and SQL Server

  - by TATWORTH

  Today's $10 deal of the day at http://www.apress.com/info/dailydeal  is Ultra-Fast ASP.NET: Building Ultra-Fast and Ultra-Scalable Websites Using ASP.NET and SQL Server by Richard Kessig - ISBN 978-1-4302-2383-2 I won a copy of this book at 101 Books. Richard Kessig is an all-star member of forums.asp.net - see http://forums.asp.net/members/RickNZ.aspx - this book has been on before as deal of the day. If you did not get a copy then, I suggest getting it today. " Ultra-Fast ASP.NET provides a practical guide to building extremely fast and scalable web sites using ASP.NET and SQL Server. It strikes a balance between imparting usable advice and backing that advice up with supporting background information. $49.99 | Published Nov 2009 | Rick Kiessig"

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• DirectWrite Producing Strange Artifacts?

  - by smoth190

  I've written the basis to my UI system around Direct2D. I like it because it's fast and easy to use (even if I had to do some messy work to get it to work with DirectX11). However, I notice when using DirectWrite I'm getting strange problems with my text. As you can see, the e is a little screwwed up, and it overall looks a little bumpy. This only happens with certain fonts in certain sizes, and with certain arrangements of letters. This particular example is Verdana in size 16.0 font. Can I fix this? It's pretty annoying to change all my words and fonts because of this problem.

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• android: How to apply pinch zoom and pan to 2D GLSurfaceView

  - by mak_just4anything

  I want to apply pinch zoom and panning effect on GLSurfaceView. It is Image editor, so It would not be 3D object. I tried to implement using these following links: https://groups.google.com/forum/#!topic/android-developers/EVNRDNInVRU Want to apply pinch and zoom to GLSurfaceView(3d Object) http://www.learnopengles.com/android-lesson-one-getting-started/ These all are links for 3D object rendering. I can not use ImageView as I need to work out with OpenGL so, had to implement it on GLSurfaceView. Suggest me or any reference links are there for such implementation. **I need it for 2D only.

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• Proper fstab entry to mount a samba share in 12.04

  - by JPbuntu

  I am a little confused on the proper fstab entry for a samba share in Ubuntu 12.04 I can get the drive to mount manually by using: sudo mount -t cifs //192.168.2.2/raid_drive /mnt/homeserver -o username=jon,password=password So I tried putting this in fstab: //192.168.2.2/raid_drive /mnt/homeserver cifs username=jon,password=password,iocharset=utf8,mode=0777,dir_mode=07??77 0 0 Which gives me this error in syslog: kernel: [ 2217.925354] CIFS: Unknown mount option mode kernel: [ 2217.936345] CIFS VFS: default security mechanism requested. The default security mechanism will be upgraded from ntlm to ntlmv2 in kernel release 3.3 This guide says to use smbfs although I believe smbfs is deprecated? What is a common fstab configuration for a samba share in Ubuntu 12.04? EDIT: Using the accepted answer below I was initially getting this error message (from dmesg): [ 45.520883] CIFS VFS: Error connecting to socket. Aborting operation [ 45.520990] CIFS VFS: cifs_mount failed w/return code = -115 although it turns out this was due to network connectivity issues, and not related to improper fstab entry.

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• Recover personal PGP key from old home

  - by Oli

  Many lives ago, I created a GPG key to sign the Ubuntu Code of Conduct on Launchpad. I haven't really used it since. Some time later, I backed up my home and started fresh. That was all back in 2009. I still have the backup but now I'm starting to play around with Quickly and upload things to Launchpad, I could really do with having my PGP key back. I don't really know how the key is organised or where it's stored, but I'd like to recover my old key rather than generate a new one. Any idea where to start?

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• Advantages and disadvantages of libgdx [on hold]

  - by Paul

  I've been an android developer for a while and am thinking about getting into gaming. While looking for a game dev framework, I thought libgdx provides very friendly documentation and functionality. So I would like to use it if there is no big obstacle. But when I tried to see how many developers employ this library, I could find not that many. Is there anything wrong with this library? In other words, I would like to know its advantages or disadvantages from any experienced developer. UPDATE: After reviewing its documentations and trying to build simple games with libgdx, I decided to go with it as its documentations are good enough and its community is very active. What I liked the most is that it provides a bunch of demo games that I can learn a lot from.

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• HSSFS Part 3: SQL Saturday is Awesome! And DEFAULT_DOMAIN(), and how I found it

  - by Most Valuable Yak (Rob Volk)

  Just a quick post I should've done yesterday but I was recovering from SQL Saturday #48 in Columbia, SC, where I went to some really excellent sessions by some very smart experts.  If you have not yet attended a SQL Saturday, or its been more than 1 month since you last did, SIGN UP NOW! While searching the OBJECT_DEFINITION() of SQL Server system procedures I stumbled across the DEFAULT_DOMAIN() function in xp_grantlogin and xp_revokelogin.  I couldn't find any information on it in Books Online, and it's a very simple, self-explanatory function, but it could be useful if you work in a multi-domain environment.  It's also the kind of neat thing you can find by using this query: SELECT OBJECT_SCHEMA_NAME([object_id]) object_schema, name FROM sys.all_objects WHERE OBJECT_DEFINITION([object_id]) LIKE '%()%'  ORDER BY 1,2 I'll post some elaborations and enhancements to this query in a later post, but it will get you started exploring the functional SQL Server sea. UPDATE: I goofed earlier and said SQL Saturday #46 was in Columbia. It's actually SQL Saturday #48, and SQL Saturday #46 was in Raleigh, NC.

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