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external hard drive not detected after ubuntu crash [restarting machine]

- by Netmoon

today i tried to watch movie [with vlc media player] from my external hard drive [expansion portable 500 GB], and it's play good, then pause the movie and play it again, and my Ubuntu crashed! [Ubuntu 12.04]i had to restart the machine, so did it, but after that Ubuntu can't recognize this hard drive! i changed USB cable but it was not effective. this is my dmesg command result : [ 191.281630] usb 2-1.3: new full-speed USB device number 9 using ehci_hcd [ 191.353527] usb 2-1.3: device descriptor read/64, error -32 [ 191.529115] usb 2-1.3: device descriptor read/64, error -32 [ 191.704669] usb 2-1.3: new full-speed USB device number 10 using ehci_hcd [ 191.776524] usb 2-1.3: device descriptor read/64, error -32 [ 191.952202] usb 2-1.3: device descriptor read/64, error -32 [ 192.127772] usb 2-1.3: new full-speed USB device number 11 using ehci_hcd [ 192.534742] usb 2-1.3: device not accepting address 11, error -32 [ 192.606749] usb 2-1.3: new full-speed USB device number 12 using ehci_hcd [ 193.013696] usb 2-1.3: device not accepting address 12, error -32 [ 193.013906] hub 2-1:1.0: unable to enumerate USB device on port 3 note: I am able to hear the sound of the external drive lens. When attach hard drive to usb port, the status light goes on, but it's low bright and i think its power is low! try to mount in Microsoft Windows 7, but nothing happened.

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Font for mac osx that is as readable and compact as the default xterm (X11) font.

- by dreeves

The font used in xterms is extremely compact yet readable. What font is that? The closest I've found that I can use in other other applications is DejaVu Sans Mono or Bitstream Vera Sans Mono. Those are as compact as xterms vertically but take up more space horizontally. I'd really like to switch from xterms to Terminal.app and this is the one thing holding me back. (I also think that font would be much better for emacs, xcode, or whatever editor.) ADDED: In Terminal.app you can adjust the character and line spacing for any font. Is this possible in other applications? I'm open to any other font that is as compact and readable as the xterm font. Dina looks really nice but it doesn't seem to work for Mac.

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Accessing Password Protected Network Drives in Windows in C#?

- by tkeE2036

Hi Everyone, So in C# I am trying to access a file on a network, for example at "//applications/myapp/test.txt", as follows: const string fileLocation = @"//applications/myapp/test.txt"; using (StreamReader fin = new StreamReader(FileLocation)) { while(!fin.EndOfStream()){ //Do some cool stuff with file } } However I get the following error: System.IO.IOException : Logon failure: unknown user name or bad password. I figure its because I need to supply some network credentials but I'm not sure how to get those to work in this situation. Does anyone know the best way (or any way) to gain access to these files that are on a a password protected location? Thanks in advance!!

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Structure of a .NET Assembly

- by Om Talsania

Assembly is the smallest unit of deployment in .NET Framework.When you compile your C# code, it will get converted into a managed module. A managed module is a standard EXE or DLL. This managed module will have the IL (Microsoft Intermediate Language) code and the metadata. Apart from this it will also have header information.The following table describes parts of a managed module.PartDescriptionPE HeaderPE32 Header for 32-bit PE32+ Header for 64-bit This is a standard Windows PE header which indicates the type of the file, i.e. whether it is an EXE or a DLL. It also contains the timestamp of the file creation date and time. It also contains some other fields which might be needed for an unmanaged PE (Portable Executable), but not important for a managed one. For managed PE, the next header i.e. CLR header is more importantCLR HeaderContains the version of the CLR required, some flags, token of the entry point method (Main), size and location of the metadata, resources, strong name, etc.MetadataThere can be many metadata tables. They can be categorized into 2 major categories.1. Tables that describe the types and members defined in your code2. Tables that describe the types and members referenced by your codeIL CodeMSIL representation of the C# code. At runtime, the CLR converts it into native instructions

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Calling software modules (Java, Perl, etc.) from R

- by harshsinghal

I've recently started using R for Natural Language Processing tasks and find that a lot of applications are available in Java and Perl (for my purposes). For example: A few perl modules are available to find distance measures between words by querying Wordnet. I am aware of the R Wordnet package, but it does not perform the tasks that these CPAN modules do. Many Java packages for NLP are out there, which I'd like to use from within R. I know of rJava, RSPerl, the simple system command amongst others, but I'd like more examples of how I could make calls to Java and Perl applications from R. Recently I tried capturing console output from a perl script. cat( 'print "Hello World\n";',file="hello.pl" ) system(command="c:\Perl64\bin\perl hello.pl") system(command=paste(Sys.getenv("COMSPEC"),"/c","C:\Perl64\bin\perl hello.pl")) None of the above system commands showed 'Hello World' on the R console. I've used "system" before to run perl scripts to perform tasks without wanting to capture console output. Any hints and redirection to other more extensive sources of information would be highly appreciated. Thank you

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What information do you capture when your software crashes in the field?

- by Russ

I am working on rewriting my unexpected error handling process, and I would like to ask the community: What information do you capture both automatic, and manually, when software you have written crashes? Right now, I capture a few items, some of which are: Automatic: Name of app that crashed Version of app that crashed Stack trace Operating System version RAM used by the application Number of processors Screen shot: (Only on non-public applications) User name and contact information (from Active Directory) Manual: What context is the user in (i.e.: what company, tech support call number, RA number, etc...) When did the user expect to happen? (Typical response: "Not to crash”) Steps to reproduce. What other bits of information do you capture that helps you discover the true cause of an applications problem, especially given that most users simply mash the keyboard when asked to tell you what happened. For the record I’m using C#, WPF and .NET version 4, but I don’t necessarily want to limit myself to those. Related: http://stackoverflow.com/questions/1226671/what-to-collect-information-when-software-crashes Related: http://stackoverflow.com/questions/701596/what-should-be-included-in-the-state-of-the-art-error-and-exception-handling-stra

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not being able to access any sudo function on my pc

- by explorex

Hi, I am not being to access any functions in my desktop and I don't have an OS besides Ubuntu 10.04 Lucid Linux and I am new to ubuntu. I think I rebooted my computer thinking that Google Chrome crashed. I opened Google Chrome but it showed opening message but never opened so I restarted my computer. and when my system was loading ('i was playing with keyboard dont know what I typed') and when by ubutnu loaded, I was unable to access anything some of characteristics are listed below I cannot hear any sound I cannot access wired ethernet connection on the right corner where I usually enable to access interne and I have no internet. There is no local apache server either. when ever I try to start apacer I get setuid must be root or something. When I type sudo then I get message setuid must be root. I cannot access orther external storage devices like pendrive and portable hard drive and cannot mount my other drives with FAT32 filesystem. When I try to start my apache webserver with out typing sudo then I get message cannnot open socket or something like it. EDIT:: i remember also doing command chown -R www-data / earlier and got error message EDIT:: and i cannot shutdown my computer, it only logs off

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opening and viewing a file in php

- by Christian Burgos

how do i open/view for editing an uploaded file in php? i have tried this but it doesn't open the file. $my_file = 'file.txt'; $handle = fopen($my_file, 'r'); $data = fread($handle,filesize($my_file)); i've also tried this but it wont work. $my_file = 'file.txt'; $handle = fopen($my_file, 'w') or die('Cannot open file: '.$my_file); $data = 'This is the data'; fwrite($handle, $data); what i have in mind is like when you want to view an uploaded resume,documents or any other ms office files like .docx,.xls,.pptx and be able to edit them, save and close the said file. edit: latest tried code... <?php // Connects to your Database include "configdb.php"; //Retrieves data from MySQL $data = mysql_query("SELECT * FROM employees") or die(mysql_error()); //Puts it into an array while($info = mysql_fetch_array( $data )) { //Outputs the image and other data //Echo "<img src=localhost/uploadfile/images".$info['photo'] ."> <br>"; Echo "<b>Name:</b> ".$info['name'] . "<br> "; Echo "<b>Email:</b> ".$info['email'] . " <br>"; Echo "<b>Phone:</b> ".$info['phone'] . " <hr>"; //$file=fopen("uploadfile/images/".$info['photo'],"r+"); $file=fopen("Applications/XAMPP/xamppfiles/htdocs/uploadfile/images/file.odt","r") or exit("unable to open file");; } ?> i am getting the error: Warning: fopen(Applications/XAMPP/xamppfiles/htdocs/uploadfile/images/file.odt): failed to open stream: No such file or directory in /Applications/XAMPP/xamppfiles/htdocs/uploadfile/view.php on line 17 unable to open file the file is in that folder, i don't know it wont find it.

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Console application GUIs

- by Matt H

How are GUIs like this made, but in console applications? There are many examples, such as alsamixer:

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Alternatives to Java bytecode instrumentation

- by Rafael Regis

I'm starting a project that will have to instrument java applications for coverage purposes (definition-usage of variables, etc). It has to add trace statements and some logic to the application and maybe remove statements. I have searched for ways of instrument Java code and what I always find is about bytecode instrumentation. My question is: It's the only way to instrument Java applications? There is any other way to do that? What are the advantages of bytecode instrumentation over the others? I'll probably use the bytecode solution, but I want to know what are the problems with the other approaches (if any) to decide precisely. Thanks!

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SSPI Errors for SQL Server Authentication?!

- by Nathan

We have several old ASP and PHP web applications which use SQL Server Authentication. Periodically, all the applications lose the ability to connect to our SQL Server 2000 database server, getting access denied. Corresponding to roughly the same times, we are getting 1115 Cannot generate SSPI Context SQLSTATE HY000 errors on the SQLServer 2000 server. And here's the weird part - rebooting the web server fixes the problem. Rebooting the database server has no effect. This makes no sense to me - I didn't think SSPI was in any way involved with SQL Server Authentication. Any ideas? Edit: Some additional details: The web server is in the DMZ. The hosts file on the web server has an entry for the database server (and the ip address is correct), so the web server (theoretically at least) shouldn't even be going to DNS to connect to the database server. It does not appear to be a firewall issue.

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Call REST service while impersonating a user that is already authorized to the glasfish server

- by user1894489

There are two web-applications deployed on a glassfish server. Both web applications provide a REST web service. the access to both web-services is secured via glassfish security constraints (at the moment BASIC Auth and file-realm). Let's say a user is accessing the service of web application A. After he is authorized, service A wants to call service B via REST client. Is there a way for a service to impersonate a user that is already authorized to the glasfish server? Maybe something like forwarding the security context or editing the headers? Is there another Filter? @Context private SecurityContext securityContext; username = securityContext.getUserPrincipal().getName(); password = ??? client.addFilter(new com.sun.jersey.api.client.filter.HTTPBasicAuthFilter(username, password)); Thanks!

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Is there such a thing as a dektop application event aggregator, similar to that used in Prism?

- by brownj

The event aggregator in Prism is great, and allows loosely coupled communication between modules within a composite application. Does such a thing exist that allows the same thing to happen between standalone applications running on a user's desktop? I could imagine developing a solution that uses WCF with TCP binding and running inside Windows Process Activation Service. Client applications could subscribe or publish events to this service as required and it would ensure all other listeners get notified of events as appropriate. Using TCP would enable event messages to be pushed out to clients without the need for polling, ensuring messages are delivered very quickly. I can't help but think though that such a thing would already exist... Is anyone aware of something like this, or have any advice on how it may be best implemented?

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How to enable a Web portal-based rich enterprise platform on different domains and hosts using JS without customization/ server configuration

- by S.Jalali

Our company Coscend has built a Web portal-based communications and cloud collaboration platform by using JavaScript (JS), which is embedded in HTML5 and formatted with CSS3. Other technologies used in the core code include Flash, Flex, PostgreSQL and MySQL. Our team would like to host this platform on five different Windows and Linux environments that run different types of Web servers such as IIS and Apache. Technical challenge: Each of these Windows and Linux servers have a different host name and domain name (and IP address), but we would like to keep our enterprise platform independent of host server configuration. Possible approach to solution: We think an API (interface module with a GUI) is needed to accomplish this level of modularity and flexibility while deploying at our enterprise customers. Seeking your insights: In this context, our team would appreciate your guidance on: Is there an algorithmic method to implement this Web portal-based platform in these Windows and Linux environments while separating it from server configuration, i.e., customizing the host name, domain name and IP address for each individual instance? For example, would it be suitable to create some JS variables / objects for host name and domain name and call them in the different implementations? If a reference to the host/domain names occurs on hundreds of portal modules, these variables or JS objects would replace that. If so, what is the best way to make these object modules written in JS portable and re-usable across different environments and instances for enterprise customers? Here is an example of the implemented code for the said platform. The following Web site (www.CoscendCommunications.com) was built using this enterprise collaboration platform and has the base code examples of the platform. This Web site is domain-specific. We like to make the underlying platform such that it is domain and host-independent. This will allow the underlying platform to be deployed in multiple instances of our enterprise customers.

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Is it viable to make a port from a C++ application to Java through LLVM

- by Javier Mr

how viable is it to port a C++ application to Java bytecode using LLVM (I guess LLJVM)? The thing is that we currently have a process written in C++ but a new client has made mandatory to been able to run the program in a multiplatform way, using the Java Virtual Machine with obviously no native code (no JNI). The idea is to be able to take the generated jar and copy then to different systems (Linux, Win, 32 bits - 64 bits) and it should just work. Looking around looks like it is possible to compile C++ to LLVM IR code and then that code to java bytecode. There is no need of the generated code to be readable. I have test a bit with similar things using emscripten, this takes C++ code and compile it to JavaScript. The result is valid JS but totally unreadable (looks like assambler). Does anybody done a port of an application from C++ to Java bytecode using this tecnique? What problems could we face? Is a valid approach for production code? Note: I am aware that currently we have some non standard C++ and close source libraries, we are looking to removing this non standard code and all close source libraries and use Free Libre Open Source Software, so lets suppose all code is standard C++ code with all code available at compile time. Note: It is not an option to write portable C++ code and then compile it to the desired target platform, the compiled program must be mltiplatform thus the use of JVM (right now we are not looking in similar solutions but Python or other language base, but i would also like to heard about it)

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Can I develop Android on Mac?

- by HelloWorld

I want to develop applications on Android. Can the SDK be installed on Mac?

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Writing code to be a better programmer

- by wtfsven

A while back I heard on a podcast about a site listing "10 applications to write that will make you a better programmer." I'm desperate to find where this is, or at the very least a decent list from someone here. The thing is, I've been writing code for about 8 years now, and it's my passion. Very few things make me happier than getting lost in some C# or Python. But I've spent the last 2 years in a job that doesn't allow me much time to do what I love. Now everyone knows that the best way to keep your coding sword sharp is to use it, and I've noticed recently that mine is getting dull. Does anyone have any suggestions on some simple programs to help flex my coding muscle? I'm one of those odd few who actually likes writing CRUD applications, so stuff like that would be nice, too.

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Examples of fast .NET WPF/WinForms apps?

- by mythz

I am currently investigating whether to build a windows application using unmanaged C/C++ or in .NET and would like to know of the kind of performance and responsiveness that is capable with a managed C#/.NET GUI app? Not surprisingly it looks like the fastest most responsive applications (e.g. chrome, spotify, etc) are written in unmanaged C/C++. I've had a hard time finding examples of really good .NET applications and so I would like some help. What's the best example of a fast and responsive .NET windows application?

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Multiple Issues - USB booting Ubuntu 12.04

- by Pixelishus

I've been using a Ubuntu 12.04 off a bootable USB stick so I can have a portable OS. Also, OS variety. I've been using it for a while and I'm still have a few issues. First and most annoying, it often lags/freezes. I'm not sure what word you would use for it, windows will often stop working and go dark/not responding from anywhere between 10 seconds to a full minute and on some occasions, even longer. However, the window eventually starts working again. Similarly, sometimes the whole system will freeze, not just the window. The mouse will still move, but nothing will work. No clicking, no menus, not keyboard shortcuts. Again, it will usually start working. I'm liking Ubuntu a lot, but those issues can make it annoying to use sometimes. For example, it will ALWAYS freeze at some point if I try to watching a Youtube video and I'll have to wait for a minute or so until it starts responding, again. Aside from the lag/freezing, anytime I download packages, it will always say "package operation failed" when it's done, though it does seem to download/install. Another issue I'm having is with shutting down. If I open the logout/shutdown menu and click shutdown, it just logs me out and takes me to the login screen. If I try shutting down through the login screen, it won't do anything. As if I didn't even go to it. I've been using the terminal to reboot or shutdown when I need to. I've looked around for answers for all of these problems and still have yet to find a solution that works. Are these just normal issues with USB booting? I haven't installed Ubuntu to any computers, I've always done USB booting.

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How to show alerts from the application when it is not running?

- by chaitanya

Hi, I have an application in which I have to show the alerts for user specied reminders, I am able to show these reminders when my application is running but my problem is i have to show thsese reminders to the user when my application is not running? is it possible to show the alerts or remindsers when the application is running? what i obsered in iphone native applications(messages, emails) it whill show no of unread or new messages at the top right tip of the icon on the desktop and it will keep on updates these count. Can I impplement these king of alerts to my applications? if yes how? it not is there any other to show the alerts when application is not running?

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C# COM+ component isn't getting the constructor string

- by Kyle W

I've created a COM+ component in C# with a strong name, COM Visible, ProgId, etc... I've then registered the assembly with regasm, and imported it into the COM+ Applications in Component Services. It runs just fine, and loads up the DLL, except that the constructor string that is passed in is always empty. The method signature is protected override void Construct(string constructString), and it is being called before the method on the actual component. In the component details in COM+ Applications, the constructor string is checked and a value is entered. Any help is appreciated.

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How to organize architecture WPF project?

- by Dmitriy

Hello! In my WPF project i want to have only one Window - MainWindow and UserControls as working part. I have some little different applications in one, and want to make navigation on top of my MainWindow as buttons. And little applications as UserControl. In MainWindow - grid with Big Empty Zone - which use to keep and run work. But, i want to navigate to other userControl from another. (probably do not understand :() How organize architecture WPF project that: one main window and many usercontrols which places in mainwindow and replace each other in turn. and there is the possibility of navigating from another usercontrol to another. May be it's MVVM, but i don't understand how this pattern can help me.

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Books on data-intensive enterprise integration patterns

- by Tristan

I'm trying to understand design patterns used by data-intensive enterprise applications. A classic example is the financial industry, where system must consume, analyze, and execute on real-time financial data while providing information and configuration options to a broad set of traders and analysts. One can imagine similar system in airlines, major supply chain operations, and utility providers. Are there good books that provide and inside view of how these systems work? Enterprise Integration Patterns is one example, but I'm looking for something with more real-world applications, particularly in finance.

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How do you keep down your urge to learn many things [closed]

- by devsundar

One of the difficulties i have is to lower my urge to learn new things (Languages, tools, frameworks etc.). I know it's good to stay the bleeding edge, but at the same time i want to learn things properly. I really see that i need to strike a balance between staying bleeding edge and knowing things properly. For example: Before choosing Arch (Desktop), Ubuntu(Server) and Knoppix(Portable) -- depending on situation -- as favourite distributions. Virtually i have tried all popular linux distributions. You name any popular linux (Redhat, Ubuntu, Arch, Suse, Knoppix, Slax, Slackware) i have tried it for some time. In fact i have spent few years experimenting the operating systems. Before choosing Python, Javascript (nodejs). I have tried all the languages i cameacross Scala, Haskell, Erlang, Ruby, Python, Perl, Scheme. Same applies for database. All popular db RDBMS (Oracle, Mysql, Postgres, SQLite[Favourite] etc) and NoSQL (Mongo, Couch, Neo4j etc.). Advantages i see: We get a overall picture of the technologies/tools/languages. It's useful to select the right tool for the job. We develop a taste and choose the One we like. Disadvantages: I feel that i spend somuch time and see a need to strike a balance. In summary, for e.g. If i see a blog post in HackerNews about CofeeScript i will try it out irrespective of what i am currently learning (Say Haskell). I switch back to learning Haskell, then again i see DART i check it out. And this continues.. Effectively i take more time to learn Haskell, but learnt about other new stuff on the way. The quetion i have is how do you strike a balance between staying bleeding edge and learning properly.

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Files in /home deleted

- by long-time user....2006

In the most specific, unemotional terms: Reinstalled os, using 11.10(1 month after release to skip initial issues that usually crop up). Configured system to my specifications(just ways of organizing config files, etc). Log out Log back in after after an hour or so...to find my home directory obliterated and just a few skeleton files existing. think oh well, try again (this has happened before with an install for reasons I've never been able to pinpoint, usually around install time with some sort of update but its never been a major recurring issue) same thing happens I thought something was awry, so I reinstalled again (another 20 minutes, meh) Set up system, arranged home directory a bit differently thinking maybe I tread on something I shouldn't have. log out, come back --- the same thing. Most of the directories I added were deleted (e.g. .xmonad which links to xmonad.hs in my portable config directory) tl;dr every change I make in my home directory gets deleted. The emotional part: UNACCEPTABLE. I need to configure my system the way I want, not get punched in the face everytime I make a change. I'll willingly fill in details as needed, this was just a start to see if anyone can help, I've found no trace of this issue in a search.

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