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• How to run Virtualbox on bridged and host-only networks?

  - by ril44

  I wish to run VirtualBox with my Ubuntu laptop on the home network (so the desktop PC can access it through the router) and also be able to ssh into the VirtualBox from host on the go (different network or with no internet). Previously, the only network adapter on the VB instance was a 'bridged connection' adapter. This allowed me to access the internet on the guest VB and for the other computers on the LAN + host to access it. However, whenever I took my laptop off the network, I could no longer access the guest from host. I read that I needed to enable a host-only adapter to access it off the network and a NAT adapter is used to access the internet from guest. My question is can I run a host-only adapter + a NAT adapter alongside a bridged network adapter in VirtualBox? I am confused what I would put inside /etc/hosts? Would I put both IP's (host-only and bridged) with the same servername in /etc/hosts?

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• Slightly off topic - How to Fix Sky Go Error [t6013-c1501] (and [t6000-c1501])

  - by bconlon

  Sky doesn't seem to understand what their own errors mean, so I cobbled together an understanding from some other posts and managed to get it working.When you see the error [t6013-c1501] instead of your TV programme in Sky Go, it seems to mean:'You registered a device, but then changed the hardware, so now I'm confused!'In other words, the Digital rights management (DRM) used between Sky Go and Silverlight stored an old fingerprint of your PC, but rather than recognising this and allowing you to remove the device, it just disappears from the 'Manage Devices' page.DISCLAIMER: Perform the following steps at your own risk. It worked for me, but I didn't care if it broke stuff. If you care....don't do it!So, to fix this I did the following:1. Login to Sky Go and click 'Watch live TV' from the home page. It will attempt to show Sky News and fail with the error [t6013-c1501].2. Right click on the error and you should see the Menu option 'Silverlight'. Select this and a dialog should appear. Click the 'Application Storage' tab and delete any entry that relates to sky go. Clcik OK to close the dialog.3. Open explorer and navigate to the folder C:\ProgramData\Microsoft\PlayReady4. Rename the file mspr.hds to mspr.hds.OLD5. Go back to the browser and click F5. You may need to logout/login (not sure).Note: Don't rename/delete the folder C:\ProgramData\Microsoft\PlayReady or you will get the error [t6000-c1501]. The folder must exist in order for the new file to be created by Silverlight. Techie talk:So whoever wrote the code to create a new mspr.hds file didn't write code to check the folder existed causing what I assume is a generic error t6000, probably something like:catch (Exception ex) { WriteToLog("Oops, something broke!"); }#

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• How should I approach learning programming languages?

  - by gcc

  I am a student of computer engineering. I have never done any programming before, and as you can understand, I don't know how to study it or how to make my own programs. My English is weak [edited for clarity - ed], and so if you don't like the choices I list, please feel free to provide others. How should I study? How should I learn programming languages? Study completely from a book. Don't study from a book, just try writing code. A mix of the two; study from a book, then try writing code. Study half the book, then write the code by hand on paper. Listed to the teacher, then try to solve general problems (those not from any specific chapter). I have send that question to stackoverflow before when I am at first year. Now, I want to construct webpage to guide fresh students by giving advise of yours and mines.Maybe, you wonder Why I want to construct webpage , I just want help the other student. I am giving a link to that question < http://stackoverflow.com/questions/3389465/how-should-i-study-programming-languagess If you have other advice, feel free. EDIT: This web cite, I think , is constructed to share member's life experience and also I know these experiences is valuable . So I have no right to want your opinion, But I want your opinion / experience even if you think it is not so helpful to other

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• Throwing and catching exceptions in the same function/method

  - by usr

  I've written a function that asks a user for input until user enters a positive integer (a natural number). Somebody said I shouldn't throw and catch exceptions in my function and should let the caller of my function handle them. I wonder what other developers think about this. I'm also probably misusing exceptions in the function. Here's the code in Java: private static int sideInput() { int side = 0; String input; Scanner scanner = new Scanner(System.in); do { System.out.print("Side length: "); input = scanner.nextLine(); try { side = Integer.parseInt(input); if (side <= 0) { // probably a misuse of exceptions throw new NumberFormatException(); } } catch (NumberFormatException numFormExc) { System.out.println("Invalid input. Enter a natural number."); } } while (side <= 0); return side; } I'm interested in two things: Should I let the caller worry about exceptions? The point of the function is that it nags the user until the user enters a natural number. Is the point of the function bad? I'm not talking about UI (user not being able to get out of the loop without proper input), but about looped input with exceptions handled. Would you say the throw statement (in this case) is a misuse of exceptions? I could easily create a flag for checking validity of the number and output the warning message based on that flag. But that would add more lines to the code and I think it's perfectly readable as it is. The thing is I often write a separate input function. If user has to input a number multiple times, I create a separate function for input that handles all formatting exceptions and limitations.

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• iOS NSError with global handler

  - by Sebastian Dressler

  I am in the beginning of programming an iOS app. Having read the Apple guides on how to deal with errors, I got the following most important points: Exceptions are for programmers Use NSError for the user Now, NSError is usually passed as out-argument which can then be used inside and has to be checked by the caller. However, I'm asking myself whether it is a good idea to use a global error handler, say a singleton which wraps around NSError and could be used to trigger errors and error handling from within the called function. Is there anything against that method or would it be a bad practice?

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• sudo access for desktop actions in Gnome/KDE?

  - by Jakobud

  I feel kinda silly asking this question. I'm using CentOS 5.4 and KDE. I downloaded an archive and I want to drag/drop the contents into a folder that I need root access to write to. I can obviously go into terminal and sudo blah blah. But how do I get sudo access for desktop procedures? Like for simple dragging and dropping of files? KDE just tells me that I don't have permission to do that, but doesn't give me the option of entering the root password or sudo.

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• How to configure in crontab with condition statement for checks

  - by chz

  We like to monitor the NAS storage mounted on a linux box. We only like to be notified via mail when the usage exceeds a certain number say 80. We have only seen in linux books where most of them are calling shell scripts at certain times. How do we write inside crontab to only mail us if it exceeds 80 ? Usual eg 2 2 * * * /home/someUser/script.sh 2&1 | mail [email protected] Looking for solution like below 2 2 * * * if [ someNumber "80" ] ; then /home/someUser/script.sh | mail [email protected] Sincerely

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• Awesome line up for SQLBits 8

  - by simonsabin

  We’ve got some really exciting things happening at SQLBits 8. I’ve been dying to tell everyone since I found out. The first is our line up from  Microsoft. We mentioned in the announcement of SQLBits that the SQLCAT team would be back. Well thats just the tip of the iceberg. Today we have announced that we will have the following speakers from the SQL Team. Mark Souza – General Manager for SQL Server Thomas Kejser - Senior Program Manager, SQL Server CAT Lubor Kollar – Principal Group Program...(read more)

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• Files don't sync with U1.

  - by wrenchman76

  I am running 10.1 (all current updates have been installed) and I'm unable to sync any files to U1. U1 shows my computer as being added to my account and I bought enough space to hold all the files I want backed up, but for some reason it still doesn't sync. I have marked the files to be synced and even checked the devices tab in the U1 preferences; it shows my computer as being part of my account but the connect button is inoperable and restart doesn't produce any effect when clicked. I have read all the FAQ I can find relating to my problem and have tried all the suggestions that seem to adress problems similar to mine, as well as adding and removing my computer from my account a bunch of times. None of these produced any effect one way or another. I'm not very techno savvy so step by step and/or lay mens terms are greatly appreciated, Thank you

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• Mitigating the 'firesheep' attack at the network layer?

  - by pobk

  What are the sysadmin's thoughts on mitigating the 'firesheep' attack for servers they manage? Firesheep is a new firefox extension that allows anyone who installs it to sidejack session it can discover. It does it's discovery by sniffing packets on the network and looking for session cookies from known sites. It is relatively easy to write plugins for the extension to listen for cookies from additional sites. From a systems/network perspective, we've discussed the possibility of encrypting the whole site, but this introduces additional load on servers and screws with site-indexing, assets and general performance. One option we've investigated is to use our firewalls to do SSL Offload, but as I mentioned earlier, this would require all of the site to be encrypted. What's the general thoughts on protecting against this attack vector? I've asked a similar question on StackOverflow, however, it would be interesting to see what the systems engineers thought.

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• CS4326/7 sound chipset on Thinkpad 600E

  - by user7120

  OK, I know this has been a problem for a while, and I know by now this really old Pentium II laptop is really really really obsolete. However, I have installed Lubuntu 10.10 on this laptop and things seem to work fine except the sound. Now I've read and gone through a bunch of tutorials and guides to working around this, none of which have worked. I have gone through this Ubuntu bug report and that doesn't work either. The problem I think is that the latest workaround is (understandably) about two Ubuntu versions behind. Now I'm not sure what has changed since then to make that workaround not work, but I would appreciate any help. Thanks

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• From where can I install my nVidia drivers? [closed]

  - by Arthur Wulf White

  Possible Duplicate: How do I install extra drivers? Additional Drivers tool in Ubuntu 12.10? I have read here and here that I should be able to install drivers. So I'm finding the Additional Drivers menu. To install nVidia driver. I started looking for System -> Administration and not finding it. I have an icon that says System Settings and it has any option related to drivers. NOTE: I am using Ubuntu 12.10.

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• Can we ask idea of software?

  - by jailed abroad

  I am new to Programmers Stack Exchange. I have read the faq. I have a basic question here that can I ask about the idea of developing software. Just for sake of example, I have started a job in software house and my CEO hands me a project. And I have no idea or flow chart in my mind through which I would develop that application. For example client needs an E-diary. I have idea of WPF but lacking flow of app. So my question is can I ask about the app that "what would be the idea to develop the application"?

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• Can I see if and when a file was deleted on Windows Server 2003?

  - by user316687

  On Windows Server 2003, is there a way to see if and when a file was deleted? It's a web server with IIS, our web application let our users to load Word documents into server. However, we found that one Word file is missing, and would like to know is it was deleted or never existed (web app could'nt load it). EDIT: I tried to follow this: Enable auditing the folder you want to keep track of. Just right click on the folder, go to “sharing and security”, then “security” tab, at the bottom click on “advanced”. Select the auditing tab, click add, select the group or users to track, then pick what actions you want to track. To track file deletion you would enable: Create files/Write data Success/Fail Create folders / append data Success/Fail Delete Subfolders/Files Success/Fail Delete Suceess/Fail This one will apply from now on, past actions wouldn't be able to track?

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• Windows 7 - cannot access my own external disk

  - by Tomas

  I use Windows 7 Home Premium and external USB disk with NTFS partition. I cannot write-access the my own files on it, even as a member of Admnistrators group! Is there any way how to go around this permission checking, without actually writing some permission information to every folder on it? I have 3 external disks (up to 1TB), and I have thousands hundreds of files on each!!! Doing some permission change, that will actually go recursivelly through all folders on all my disks is plain brain damage!! 1) Is there any way how to change it somehow globally? (like mount options...) .. Or how to go around this annoying permission checking? It was working in Win XP normally! 2) if not, and I must do the recursive operation on all folders, how to do it PERMANENTLY, so that I don't need to do it again on another Windows 7 computer!

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• Oracle Partner Specialists – Sell & Deliver High Value Products to Customers

  - by Richard Lefebvre

  Normal 0 false false false EN-US X-NONE X-NONE MicrosoftInternetExplorer4 Do you want to know where to find useful information about partner training and other activities to complete Oracle Specialization available in the country you are personally based? Go to the EMEA partner enablement blog and read latest information regarding training opportunities ready to join for Cloud Services, Applications, Business Intelligence, Middleware, Database 12c, Engineered System as well as Server & Storage. Recently, we announced new TestFest events in France, which you can join to pass your own Implementation Assessment within the Specialization category you have already chosen. To find out where and when the next TestFest close to your location will take place, please contact [email protected] or watch out for further announcements of TestFest events in your home country. Turnback to the EMEA Partner Enablement Blog from time to time to update your own Specialization and join the latest training for Sales, Presales or Implementation Specialists:  https://blogs.oracle.com/opnenablement/

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• See you at European SharePoint Conference, Barcelona, May 5-8, 2014

  - by Sahil Malik

  SharePoint, WCF and Azure Trainings: more information I’ll be at the European SharePoint Conference, in Barcelona, May 5th – 8th, 2014. They just released their full conference program. I have the following sessions planned, Monday, the 5th of May Full day workshop: SharePoint 2013 App Development (see the full outline here) Thursday the 8th of May, 10:15 AM Optimizing SQL Server for speedy SharePoint If you're a SQL Server DBA or a SharePoint admin, attend this session and WOW your bosses when you return. SharePoint is slow! Really? Okay, it is a common complaint I hear. But did you know, a few tweaks here and there, and with the very same hardware you can get many 100 times better performance. And many of these you can do on a running production environment. Read full article ....

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• Can you tell whether I have a hardware or software problem with a DVD-ROM drive?

  - by user8934

  Trying to copy the content of a DVD on a Asrock ION 330 running Maverick, i.e. with: dd if=/dev/sr0 of=dvdcopy ...I get errors in /var/log/messages: Jan 15 17:18:15 asrock kernel: [ 2616.445966] sr 1:0:0:0: [sr0] Unhandled sense code Jan 15 17:18:15 asrock kernel: [ 2616.445975] sr 1:0:0:0: [sr0] Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE Jan 15 17:18:15 asrock kernel: [ 2616.445984] sr 1:0:0:0: [sr0] Sense Key : Medium Error [current] Jan 15 17:18:15 asrock kernel: [ 2616.445994] sr 1:0:0:0: [sr0] Add. Sense: Id CRC or ECC error Jan 15 17:18:15 asrock kernel: [ 2616.446004] sr 1:0:0:0: [sr0] CDB: Read(10): 28 00 00 00 00 02 00 00 02 00 I'd tell it is a hardware problem, but it happens with various DVDs and on a second PC, also running Maverick... Both the PCs previously ran Lucid, same problems.

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• How to add UTF-8 support to my hard disk in fstab?

  - by punkmexic

  I use Ubuntu (Spanish language). Sometimes I get this error when I use special characters (codification error) so I read that if I edit a file of my hard disk by using gedit /etc/fstab and adding utf8 I can fix it.... I had this line: UUID=bfb5b95e-bf68-464a-8abf-d6027b039fa4 / ext4 errors=remount-ro 0 1 I adeed utf8 like this: UUID=bfb5b95e-bf68-464a-8abf-d6027b039fa4 / ext4 errors=remount-ro,iocharset=utf8 0 1 But I messed my Ubuntu and I can't log in now to my Ubuntu so im using live session... so I'll have to remove that code in order to be able to use my Ubuntu again. Can someone tell me how that line should look like?

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• Only allow root to change filesystem

  - by Uejji

  The VPS I manage uses a simple hard link rsync archive daily backup system saved to a loop file. This is great, because each backup only takes up as much space as what has changed each day, and all user/group permissions are kept. I would like to give users direct access to their home directories in each backup, but I'm worried about intentional or accidental backup data destruction, as how it stands now users can actually change, destroy or add to backed up data they originally owned. I've been looking for a way to mount this filesystem similar to an ro mount option, but something that would still allow rw access to root, but I've had absolutely no luck. In other words, I want users to be able to view and copy their backed up data without actually being able to change it, and have that data maintain the original permissions. I've got no real preferences as far as filesystem, as long as it's a standard unix filesystem that can preserve permissions, support hard links and deny write access to users without actually stripping the w permission from everything.

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• Java login through LDAP

  - by Salda

  I am starting to write an application for our office and the first step is authentication through LDAP where all users already exist. Everything I need is a code in Java to check if the pair <nick,password> is right. Google found me many links, but I think that I will find here the most sofisticate, short and up to date solution (I don't want to read all articles like 2 whole days to do something so simple). I have written many dkBs of code in C++, but in Java I am total noob and I haven't coded anything with LDAP yet so try to be simple if speaking in Java and LDAP terms if possible.

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• if a usb pen drive has 64349 cylinders, is it damaged?

  - by Andrew S

  I have a 4Gb USB pen drive that I'm trying to format with FAT32. When I run fdisk, it gives me this message: The number of cylinders for this disk is set to 64349. There is nothing wrong with that, but this is larger than 1024, and could in certain setups cause problems with: 1) software that runs at boot time (e.g., old versions of LILO) 2) booting and partitioning software from other OSs (e.g., DOS FDISK, OS/2 FDISK) I've tried deleting the partition table, creating new partitions, etc, but they never work. Sometimes I can write to the drive the first time I use it after formatting it, but then it becomes read-only in both Windows and Linux. I've tried this on multiple computers. Am I doing something wrong, or is the drive reporting an incorrect number of cylinders? Is the drive itself likely to be corrupted, and is there anyway to fix this under Windows Vista or Linux? Thanks

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• 12.10 Grub-customizer error

  - by SteveK

  I am trying to use grub-customizer in 12.10 which ran in 12.04. I now get error grub-mkconfig couldn't be executed successfully. error message: Generating grub.cfg ... Found linux image: /boot/vmlinuz-3.5.0-18-generic Found initrd image: /boot/initrd.img-3.5.0-18-generic Found linux image: /boot/vmlinuz-3.2.0-32-generic-pae Found initrd image: /boot/initrd.img-3.2.0-32-generic-pae Found linux image: /boot/vmlinuz-3.5.0-18-generic Found initrd image: /boot/initrd.img-3.5.0-18-generic Found linux image: /boot/vmlinuz-3.2.0-32-generic-pae Found initrd image: /boot/initrd.img-3.2.0-32-generic-pae Found memtest86+ image: /boot/memtest86+.bin Found memtest86+ image: /boot/memtest86+.bin Found Windows Recovery Environment (loader) on /dev/sda1 Found Windows 7 (loader) on /dev/sda2 I have removed and reinstalled it to no avail. steve@steve-Ubuntu:~$ grub-mkconfig --version grub-mkconfig (GRUB) 2.00-7ubuntu11 I also noticed that file device.map does not exits but in other forums read that it is not in 12.10. Help please

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• Would upgrading memory from 4GB to 8GB on my laptop solve swapping issues?

  - by Tom

  I have a laptop with 4GB of memory with Windows 7 on it and I often experience with Eclipse that it is swapped out to disk. On the net they usually write 4GB of RAM is more than enough for average use and aside from Eclipse+Android Emulator I don't really use other extra apps, yet Eclipse is always swapped out if I haven't used it for a while (say, 1 day) and it is annoying it to wait for it to be resurrected from swap. My question is: would an upgrade to 8GB solve the issue of swapped out applications? With 8GB would windows 7 keep everything in memory? Or it wouldn't change anything and Eclipse would be swapped out regardless of the amount of memory, because Win 7 has a habit of kicking out every application from memory which hasn't be used for a while?

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• Master Typing Productivity when Programming/SysAdmin [closed]

  - by Hartator

  I try to learn how to type fast and have managed to learn a lot. I am quite good at typing english text now. I do a lot of programmation though and if QWERTY seems fitted for english text, it doesn't seem fitted to type Ruby, Python, Javascript, Command Line or C++... I have read plenty of articles and if I respect their guidelines/tips, I am using a lot my right pinky specially to type []{}|\;:'"/?=+ enter delete. As you can see this symbols are the ones which are the most used when you are programming and we are using only one weak finger to reach them. Am I learning wrong? Is there is a way to be more productive? (I don't really want to switch to DVORAK) Have you some experiences/tips to share regarding this issue? Original Post : http://stackoverflow.com/questions/12230373/programmer-typing-productivty

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