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• How to remove a directory which looks corrupted

  - by hap497

  Hi, I am using ubuntu 9.10. And I only directory, it shows as '?' for user/ownership. How can I remove it? -rw-r--r-- 1 hap497 hap497 1822 2010-01-28 22:48 IntSizeHash.h d????????? ? ? ? ? ? .libs/ -rw-r--r-- 1 hap497 hap497 194 2010-02-25 12:12 libwebkit_1_0_la-BitmapImage.lo I have tried "$ sudo rm -Rf .libs rm: cannot remove `.libs': Input/output error" Thank you for any pointers.

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• Why does Scala require functions to have explicit return type?

  - by garbage collection

  I recently began learning to program in Scala, and it's been fun so far. I really like the ability to declare functions within another function which just seems to intuitive thing to do. One pet peeve I have about Scala is the fact that Scala requires explicit return type in its functions. And I feel like this hinders on expressiveness of the language. Also it's just difficult to program with that requirement. Maybe it's because I come from Javascript and Ruby comfort zone. But for a language like Scala which will have tons of connected functions in an application, I cannot conceive how I brainstorm in my head exactly what type the particular function I am writing should return with recursions after recursions. This requirement of explicit return type declaration on functions, do not bother me for languages like Java and C++. Recursions in Java and C++, when they did happen, often were dealt with 2 to 3 functions max. Never several functions chained up together like Scala. So I guess I'm wondering if there is a good reason why Scala should have the requirement of functions having explicit return type?

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• Flashing screen hovering over menubar on left side

  - by iwekb

  Just installed Ubuntu 10.10 netbook version on an older Dell Laptop (no other operating system installed). When hovering with mouse over menu bar, the full screen changes to default coloured back ground shortly and then back to normal (as after start-up) again. And that each time the mouse is over any of the (default) icons on the menu bar. I am not able to select any icon. No left or right click works on icons or anywhere on the menubar apart from the left top small icon, white Ubuntu logo, and the right top small icons for WiFi, sound, mail, shut-down etc. Those icons work. I tried re-installation again and all patches are downloaded. Same problem. Problem is that I can't enter commands either to reduce e.g. the swappiness (if that would be of any help). Can somebody help me that encountered similar problem or knows a resolution?

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• How can I run everything as root

  - by Hermione

  I have dual booted to lubuntu (with Windows XP) and everytime and then I'm getting asked for my password. How do I run everything as root and not ask a password again? Ideally I wanted to run nginx but it has permission denied issues: apathetic@ubuntu:~$ service nginx start Starting nginx: nginx: [alert] could not open error log file: open() "/var/log/nginx/error.log" failed (13: Permission denied) 2012/08/03 20:06:25 [warn] 4762#0: the "user" directive makes sense only if the master process runs with super-user privileges, ignored in /etc/nginx/nginx.conf:1 nginx: the configuration file /etc/nginx/nginx.conf syntax is ok 2012/08/03 20:06:25 [emerg] 4762#0: open() "/var/run/nginx.pid" failed (13: Permission denied) nginx: configuration file /etc/nginx/nginx.conf test failed

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• Advise on effectively re-entering CPP world [closed]

  - by Aadith

  I am getting back into C++ world after nearly a decade. Apparently, there has been a world of development. Would like to get the developer community's advice as to what would be a good approach to have a smooth take-off. To start with, I have done the following: Read up (very briefly) on C++ 11 standards Installed GCC 4.7 Wrote a Hello World program I am sure getting a decent book and reading through it would do. But I am looking for any strategic advise experts might have to share. Trying to leverage on past experience to have a short but effective initial learning span. What would be top few things I would have to look into?

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• Too much to learn, dealing with overwhelming varieties of technologies [closed]

  - by zhenka

  I am about to graduate, and I am already working as a web developer in our library IT department. When I look at job postings I am absolutely overwhelmed by the sheer variety of technologies out there. Some companies care about math + algorithms + data structures. Some care about experiences in technology stack XYZ. SQL, css, html, frameworks, javascript, design patterns etc.. etc... etc... At some point I realized I just need to start at mastering a foundation to become employable at a better place and go from there. But the skill-set to get me in the doors varies and I just don't have time to learn everything. How do you deal with this issue? What is the essential stack to become employable? Say in php or ror arena. Perhaps a smarter move would be to move to a technology stack with less variety like .net?

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• Java EE 7 support in Eclipse 4.3

  - by arungupta

  Eclipse Kepler (4.3) features 71 different open source projects and over 58 million LOC. One of the main themes of the release is the support for Java EE 7. Kepler specifically added support for the features mentioned below: Create Java EE 7 Eclipse projects or using Maven New facets for JPA 2.1, JSF 2.2, Servlet 3.1, JAX-RS 2.0, EJB 3.2 Schemas and descriptors updated for Java EE 7 standards (web.xml, application.xml, ejb-jar.xml, etc) Tolerance for JPA 2.1 such as features can be used without causing invalidation and content assist for UI (JPA 2.1) Support for NamedStoredProcedureQuery (JPA 2.1) Schema generation configuration in persistence.xml (JPA 2.1) Updates to persistence.xml editor with the new JPA 2.1 properties Existing features support EE7 (Web Page Editor, Palette, EL content assist, annotations, JSF tags, Facelets, etc) Code generation wizards tolerant of EE7 (New EJB, Servlet, JSP, etc.) A comprehensive list of features added in this release is available in Web Tools Platform 3.5 - New and Noteworthy. Download Eclipse 4.3 and Java EE 7 SDK and start playing with Java EE 7! Oracle Enterprise Pack for Eclipse was released recently that uses Eclipse Kepler RC3 but will be refreshed soon to include the final bits.

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• Open file with java application [migrated]

  - by Giaphage47

  I am using Ubuntu. I would like to have a user be able to double-click (or whatever they have set to open a file) on the save file for a java game i'm making, and have the game start and automatically load the save. How could I make the game launch instead of opening the file, and then pass the save's file name or location as an argument? Would i have to have the game create a new mime type the first time it ran, or something similar, so that Ubuntu knows what to do with the save when the user tries to open it?

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• I need advice on how to debug a cluster

  - by alcor

  I'm the only developer of a complex critical software system, written in Visual C++ 2005. It's deployed on a classical Microsoft cluster scenario (active/passive), that has Windows Server 2003 R2. If a server A goes down, the other one (B) starts and take the ownership of its duties. You have to know that: both servers have the same Microsoft patches/fixes, same hardware, same everything. both servers use the same memory storage (a RAID-6 through fiber channel). this software has a main module who launch the peripheral modules. if a peripheral module crashes, the main module restarts it. When I switch the application in one of the two servers (let's say the B server) two of the peripheral modules of the main applications just started to crash apparently without reason about 2 seconds after the start of the peripheral module. What could I do to analyze/inspect/resolve this weird situation?

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• SharePoint Saved My Puppy

  - by Mark Rackley

  The SharePoint journeys video contest ends today, and I thought I’d submit my video about how SharePoint has changed my life. The video has not been approved yet for some reason, so I thought I’d post it quickly here… When it does get approved, please be sure to rate it.  Thank you SharePoint for giving me back my puppy… Maybe we can start a write-in campaign or something???  And be nice.. it’s all in good fun.

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• registration form with payment system ( paypal ) [closed]

  - by Alecs

  I'm using an ajax registration form plugin for my website and I'm thinking to implement also Paypal. Here is how I want to implement it : I have 3 labels ( Name, Phone, Email, ) and a " Buy " button. After the user is typing his name, phone and email they click on "Buy" and they will be redirected to the paypal payment page or if it's possible to stay on the same page. Probably, what I need to know is how to make the "Buy " only after the forms ( name, phone, email ) are validated. Is there a plugin, or a snippet of code already made to not start something which already exists.

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• How can I redirect any kind of access to my site to somewhere else, except for me?

  - by Omega

  My site, www.example.com has a MyBB forum installation, and has many users constantly checking it out. I would like to make a major change to it - basically, I want to delete everything it has and start clean. However, this rebuilding process may take me hours since I need to do a lot of things. Thus, whenever an user tries to enter any part of my site (www.example.com, www.example.com/blog etc), the user will always be redirected to www.example.com/underconstruction so they can see a nice HTML site explaining the current situation. But not only that - while I am configuring my site, I need to visit it myself to make sure things do work live. So basically, it has to redirect everyone who isn't me. Is that possible in any way? I am using GoDaddy hosting.

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• Developing applications for iPhone, BlackBerry and J2ME in ASP.Net

  Hi, I would like to introduce you a new mobile application framework iPFaces for developing native, form-oriented applications. The aim of the solution is to screen the programmer completely out from the mobile platform itself, and transfer the entire application logic to the central application server level. Developers with experience with one of the supported Web technologies (ASP.Net, Java, and PHP) may start working with iPFaces virtually immediately. For more information, see the project...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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• Uploading my ITunes music that I saved on a flash drive to ITunes on my new computer then downloading it to my Ipod Touch

  - by Joshua Kricker

  I had an old computer with Windows XP. I transferred all my music, at least I hoped I had to a flash drive. Also, my computer kept giving me error messages that it could no longer sync to my Ipod Touch First Generation. I reformatted my Ipod back to original factory specs on the old computer. I have a new computer with Windows 7. I can't transfer my music from my flash drive to the ITunes Library. I also can't transfer it to my Ipod. I keep getting the message "Songs cannot be added to the Ipod because all of its space has been reserved for data." There's nothing in the Ipod memory. It's clear. What can I do? I want my music back.

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• Development methodology for single web developer?

  - by CaseTA

  I'm a web developer who mostly works with the LAMP stack when it comes to my own projects. Most of the time I just start coding on a project and fixing bugs and adding features as I go along. Often I'll try to use an existing solution such as Wordpress or Drupal. Now that I'm thinking of creating my own web application with businesses as the target group, I feel there's a need for proper analysis and design. Something lightweight for a one person project and still solid enough to handle requirements, user interfaces, security, etc. If you could recommend methodologies and literature I would be grateful.

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• My Windows 7 is getting the "An error occurred. Press control+alt+del" message on boot

  - by Maxrunner

  So I upgraded my ubuntu to 12.10 but the Windows 7 problem seems to have happened not after doing the upgrade but later. I am not sure. Ubuntu is running fine, but how can I recover my Windows7? I tried running BootRepair in Ubuntu but it keeps scanning system endlessly... If I recover Windows with the Windows DVD I assume I will lose the GRUB menu and then not possible to start Ubuntu. How do i then proceed to recover the GRUB? Can I recover using the Ubuntu DVD?

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• Why Netbeans 6.8 remote project (php) uploads all files by default

  - by xaguilars

  Hi I wanted to know if there's some option for disabling Netbeans to upload all files of a recently imported remote (php) project. I always check "Upload files on run", in the project configuration. But when I click on run Netbeans selects all files by default (I modified only some). The file checkboxes cannot be disabled at once and you have to do this one by one (imagine you have 5000 files...). That's annoying. Do you know any solution? thank you

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• linux or vmware

  - by bahar

  Hi I don't know if here is the right place to ask this question or not but its vital for me to solve it. I run open suse 10.2 on a vmware and my operating system is vista. yesterday I run my vmware and another program but both couldn't run and I end both tasks to solve it but now I can open vmware without any problem and run another os but not my open suse. the error is: Cannot open the disk 'C:\Users\hamide\Documents\Virtual Machines\SUSE Linux 2\SUSE Linux 2-000003.vmdk' or one of the snapshot disks it depends on. Reason: Failed to lock the file. please help me I don't have any recent back up and It takes too long to do all my project again.:( Bests

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• Move /var directories to to /mnt on an EC2 instance

  - by Geoff Lanotte

  I am trying to work on a standard configuration for a set of EC2 instances running ubuntu 12.04. These servers are going to be primarily web servers for a Ruby on Rails application. When you configure a new large instance, you are given a primary of 8GB and then ephemeral storage of 400 GB that is mounted to /mnt. It seems logical to me to move some directories that have a potential for growth off to the /mnt directory, I was specifically thinking of /var/www and /var/log. My question is two-fold: Is this a good idea or are there pitfalls that I cannot see? If this is a good idea, how should I go about configuring this. I do have the ability to configure new instances and down our old instances. My concern is over long term, doing this in such a way that it prevents downtime. I am a developer with some experience in devops, but mounting drives is something I have not faced before, so explicit directions would be greatly appreciated.

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• how to copy photos in ipad to my pc?

  - by davidshen84

  hi, i used the iTune to sync my photos to my ipad. but now, i lost the copies of the photos on my pc, so i want to restore them back from my ipad. but from the storage folder that ipad exposed, i cannot find my photos. and i am not sure if the photo sync function in iTune can sync the photos on my ipad to my pc, because it seems it can only sync stuffs from pc to ipad. i am not sure if jail break the ipad can help me.

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• Where to go from here, how to improve / learn more

  - by bExplosion

  I finished University around 4 years ago double degree in Software Eng/Comp Sci. Got my first job at a startup in my final year, was with them for 2.5 years then started my own business. So far everything is going great, lots of clients and stead work etc, but coming right out of uni and into a start up I never had any form or senior software engineer guiding my work or suggesting improvements etc... Whats the best way for me to improve & learn more? Books? MS Exams? Other? I develop in C#, ASP.NET/MVC. Update The problem isn't really with releasing products, I've released quite a few which are up and running with customers happy. It's more with quality of code, best practices, how do I know something I am code is correct, it may work but there may be ways of coding it much more efficiently or by adhering to some kind of standard Cheers for any responses! Matt

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• Help deciding on an area of study for a PhD [closed]

  - by ale

  I am going to start a PhD in about 1 year. My undergraduate degree is in computer science and my master's is in artificial intelligence. I want to get ideas about what's going to be hot in say 5 years i.e. what could I spend 3-4 years studying to potentially have expertise that will be applicable to industry and the computing world ? Impossible to answer factually but some ideas and thoughts would be great. I have narrowed my ideas down to AI (yes, even more AI) and information security. AI seems to becoming popular again but security is always a going to be useful. From a career point of view, if I were to stay working in software development then this might actually be the best move but I've always wanted to do a PhD! Many thanks :).

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• Thunderbird "Folders" and "Inbox" font size

  - by bo gusman

  Graphical programs are such a pain sometimes. I am of an age where 1024x768 is the highest resolution that I can see. I had set my Windows 7 system fonts to be 125% - that helps a lot - but it screws up the tool bars on many other programs so I've reverted to 100% and it's now too hard to read in many cases. Most browsers will let you easily scale text font size as will the "message" window of Thunderbird (aside from setting the default font size for reading messages to 24 point, CTRL + + works wonders). However, I cannot seem to find a way to set the font size for the other panes - the Folders pane and the inbox pane. Is there some undocumented way to do that?

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• How to add a VM Server to a VM Domain when the host is not on that domain.

  - by Charlie

  I have created A VM running Windows Server 2008 R2, using VMWare. I have configured this as a domain controller running a Windows Server 2008 domain. I have also created another VM running Windows Server 2008 R2. The HOST machine is using Windows 7 Professional 64 bit. When I try to add the second VM into the domain that the first is the DC for it fails as the VM cannot contact the DC. Simple question really. What have I missed? Is it something to do with the configuration on the Host machine? What do I need to do to enable this scenario? Thanks

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• SQL Server SQLCMD Basics

  Sqlcmd makes many SQL Server tasks, such as automating test runs and maintenance tasks, easier and quicker. The sqlcmd command-line utility is valuable to any database developer or DBA as the prime means of executing batches of SQL Statements to SQL servers, and saving results to file. Rob Sheldon gives you the basic facts about this great utility. Get your SQL Server database under version control now!Version control is standard for applications, but databases haven’t caught up. So how can you bring database development up to speed? Why should you start? Find out…

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