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  • linux raw socket programming question

    - by user194420
    Hi all, I am trying to create a raw socket which send and receive message with ip/tcp header under linux. I can successfully binds to a port and receive tcp message(ie:syn) However, the message seems to be handled by the os, but not mine. I am just a reader of it(like wireshark). My raw socket binds to port 8888, and then i try to telnet to that port . In wireshark, it shows that the port 8888 reply a "rst ack" when it receive the "syn" request. In my program, it shows that it receive a new message and it doesnot reply with any message. Any way to actually binds to that port?(prevent os handle it) Here is part of my code, i try to cut those error checking for easy reading sockfd = socket(AF_INET, SOCK_RAW, IPPROTO_TCP); int tmp = 1; const int *val = &tmp; setsockopt (sockfd, IPPROTO_IP, IP_HDRINCL, val, sizeof (tmp)); servaddr.sin_family = AF_INET; servaddr.sin_addr.s_addr = htonl(INADDR_ANY); servaddr.sin_port = htons(8888); bind(sockfd, (struct sockaddr*)&servaddr, sizeof(servaddr)); //call recv in loop

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  • Programming time schedule for porting a program.

    - by Lothar
    I'm working on a large program which has an abstracted GUI API. It is very GUI based, many dialogs and a few nasty features which rely heavily on the message flow of the GUI (correct sequences of focus/mouse/active handling etc.) - not easy to port I now want to port it from the currently used FOX Toolkit to native Cocoa/MFC. I give myself a timeframe until the end of the year but my main work will be to continue development work with the existing toolkit, but there is no planned release for end customers before both tasks are done. My question is how should i spend my time? Stop working on the main program and do a 90% port (about 3 month) of the GUI first Splitting everything into smaller sessions of one month each. Assigning Monday/Tuesday to the GUI project and the rest of the week for the app. Finishing the App first, then port. I think there are three arguments which i need to balance. Motivation, i want to see something going on on both projects Brain Input Overflow, both tasks require a lot of detail information in my brain and sometimes enough is just enough. I guess the porting is intervowen so porting would also require a lot of code changes in the existing code and the new code that will be written in the meantime.

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  • Programming an IPTV application- Client/Server

    - by Sumit Ghosh
    I am part of a team which has been given a task to deploy an IPTV solution for a company. The system has been architect-ed like this. There is Video capture card , which receives satellite signals from a satellite receiver. This video capture card is part of a windows 7 machine. The signals need to be trans coded here and passed to a streaming server which will be received by end users. The end users will be desktop users having a C#.NET application installed to view the channels. I am confused at the choice of server software as I have multiple choices - Windows Media Server, VideoLan (VLC project), or Flash Media Server, it also supports MPEG-2 HD. My main aim to be able to stream MPEG-2 channels with HD quality and encrypt the channels at the server end so that the streams can be protected. I know reversing is possible but it wont be easy as for every naive user with wireshark snooping my streams. If any of you here has ever done such an implementation please do suggest me the best technologies I should go for. Iam open to C#,C++ and other similar languages. Any help shall be deeply appreciated. edit: End Users shall be part of Internet and not necessarily a lan, reason for this question is internet doesn't support multicast like Lan, so I need some suggestions.

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  • How to handle xpath in SQL query while programming in Java

    - by Pratik
    I am trying to execute the SQL statement from my java application Due website restriction on url I have replaced http=htp for this post. SELECT DISTINCT(DID) FROM (SELECT e_id DID, xml_doc xml, rownum rn from employee_master_indexes)," + " table(XMLSequence(extract(xml,'//cf:SalesReport/ext:Sales/*//j:PersonAssignedIDDetails/j:PersonID/j:ID',"+ "'xmlns:j=\" htp://www.it.jvp.com/xmm/3.0.3\" xmlns:xsi=\" htp://www.w3.org/2001/XMLSchema\" " + "xmlns:ext=\" htp://xml.crossflo.com/xdm/3.0.3/extension\" xmlns:cf=\" htp://xml.crossflo.com/xdm/3.0.3\" ')))EMPID" + "WHERE extractValue(value(EMPID),'/j:ID', 'xmlns:j=\" htp://www.it.jvp.com/xmm/3.0.3\"') LIKE '%-%-%' AND rn BETWEEN 999 AND 2001"; but end up with 10/05/24 11:11:51 java.sql.SQLException: ORA-00933: SQL command not properly ended 10/05/24 11:11:51 at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:138) 10/05/24 11:11:51 at oracle.jdbc.driver.T4CTTIoer.processError(T4CTTIoer.java:316) 10/05/24 11:11:51 at oracle.jdbc.driver.T4CTTIoer.processError(T4CTTIoer.java:282) 10/05/24 11:11:51 at oracle.jdbc.driver.T4C8Oall.receive(T4C8Oall.java:639) 10/05/24 11:11:51 at oracle.jdbc.driver.T4CStatement.doOall8(T4CStatement.java:113) 10/05/24 11:11:51 at oracle.jdbc.driver.T4CStatement.execute_for_describe(T4CStatement.java:431) 10/05/24 11:11:51 at oracle.jdbc.driver.OracleStatement.execute_maybe_describe(OracleStatement.java:1029) 10/05/24 11:11:51 at oracle.jdbc.driver.T4CStatement.execute_maybe_describe(T4CStatement.java:463) 10/05/24 11:11:51 at oracle.jdbc.driver.OracleStatement.doExecuteWithTimeout(OracleStatement.java:1126) 10/05/24 11:11:51 at oracle.jdbc.driver.OracleStatement.executeQuery(OracleStatement.java:1274) 10/05/24 11:11:51 at oracle_jdbc_driver_T4CStatement_Proxy.executeQuery() I am able to run this query properly on my sql prompt.Any guidance on what makes oracle give me this exception would be appreciated.

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  • java programming

    - by Baiba
    ok i have version of t code, please tell me what i need to do when i need to get out of program The INDEX NUMBER OF COLUMN IN WHICH ARE LEAST ZEROS? class Uzd{ public static void main(String args[]){ int mas[][]= {{3,4,7,5,0}, {4,5,3,0,1}, {8,2,4,0,3}, {7,0,2,0,1}, {0,0,1,3,0}}; int nul_mas[] = new int[5]; int nul=0; for(int j=0;j<5;j++){// nul=0; for(int i=0;i<5;i++){ if(mas[i][j]==0){ nul++; } } nul_mas[j]=nul; } for(int i=0;i<5;i++){ for(int j=0;j<5;j++){ System.out.print(mas[i][j]); } System.out.println(); } System.out.println();// atstarpe System.out.println("///zeros in each column///"); for(int i=0;i<5;i++){System.out.print(nul_mas[i]);} System.out.println(); }} and after running it shows: 34750 45301 82403 70201 00130 ///zeros in each column/// But i need not in each column but i need to get out index of column in which zeros are least! in this situation it is column nubmer 2!! 12032

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  • Purpose of singletons in programming

    - by thecoshman
    This is admittedly a rather loose question. My current understanding of singletons is that they are a class that you set up in such a way that only one instance is ever created. This sounds a lot like a static class to me. The main differnce being that with a static class you don't / can't instance it, you just use it such as Math.pi(). With a singletong class, you would still need to do something like singleton mySingleton = new singleton(); mysingleton.set_name("foo"); singleton otherSingleton = new singleton(); // correct me if i am wrong, but mysingleton == othersingleton right now, yes? // this the following should happen? otherSingleston.set_name("bar"); mysingleton.report_name(); // will output "bar" won't it? Please note, I am asking this language independently, more about the concept. So I am not so worried about actually how to coed such a class, but more why you would wan't to and what thing you would need to consider.

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  • iPhone SDK Programming - Working with a variable across 2 views

    - by SD
    I have what I hope is a fairly simple question about using the value from a variable across 2 views. I’m new to the iPhone SDK platform and the Model/View/Controller methodology. I’ve got background in VB.Net, some Php, but mostly SQL, so this is new ground for me. I’m building an app that has 3 views. For simplicity’s sake, I’ll call them View1, View2, View3. On View1 I have an NSString variable that I’ve declared in View1.h, and synthesized in View1.m. I’ll call it String1. View1.m uses a UITextField to ask the user for their name and then sets the value of String1 to that name (i.e. "Bill"). I would now like to use the value of String1 in View2. I'm not doing anything other than displaying the value ("Bill"), in a UILabel object in View2. Can someone tell me what the easiest way to accomplish that is? Many thanks in advance….

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  • Python programming - Windows focus and program process

    - by Zack
    I'm working on a python program that will automatically combine sets of files based on their names. Being a newbie, I wasn't quite sure how to go about it, so I decided to just brute force it with the win32api. So I'm attempting to do everything with virtual keys. So I run the script, it selects the top file (after arranging the by name), then sends a right click command,selects 'combine as adobe PDF', and then have it push enter. This launched the Acrobat combine window, where I send another 'enter' command. The here's where I hit the problem. The folder where I'm converting these things loses focus and I'm unsure how to get it back. Sending alt+tab commands seems somewhat unreliable. It sometimes switches to the wrong thing. A much bigger issue for me.. Different combination of files take different times to combine. though I haven't gotten this far in my code, my plan was to set some arbitrarily long time.sleep() command before it finally sent the last "enter" command to finish and confirm the file name completing the combination process. Is there a way to monitor another programs progress? Is there a way to have python not execute anymore code until something else has finished?

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  • HTML5 Canvas and Game Programming

    - by LemonBeagle
    I hope this isn't too open ended. I'm wondering if there is a better (more battery-friendly) way of doing this -- I have a small HTML 5 game, drawn in a canvas (let's say 500x500). I have some objects whose positions I update every 50ms or so. My current implementation re-draws the entire canvas every 50ms. I can't imagine that being very good for battery life on mobile platforms. Is there a better way to do this? This must be a common pattern with games. EDIT: as requested, here are some more updates: Right now, the objects are geometric primitives drawn via arcs and lines. I'm not opposed to making these small png/jpg/gif files instead of that'd help out. These are small graphics -- just 15x15 or so. As the game progresses, more and more of the screen changes at a time. However, at the start, the screen changes relatively slowly (the objects randomly moved a few pixels every 50ms).

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  • Microphones not working on Apple macbook Air 1,1 (Early 2008) under Linux

    - by jj_p
    I'm running Linux on an mba. I can't make the microphones (neither external nor internal) work. I test using alsamixer and arecord -d 5 test-mic.waw together with aplay test-mic.waw It seems there is a problem with kernel trying to decipher Apple (intentionally) corrupted 'bios', in particular the mic pins are wrongly assigned. As far as we are concerned here, is there any difference between using EFI and BIOS-compatibility mode? (see https://wiki.archlinux.org/index.php/MacBook where they claim to have everything working out of the box on mba1,1) A nice proposal would be to compile the latest Linux kernel and run hda-jack-retask to find the right configuration (in the case of Realtek codec, the missing things I'm supposed to check are either some vendor-specific COEF verbs, EAPD or GPIO setup.), and then come up with a kernel patch to address the issue. Since I'm not that familiar with this last part of the story, can anyone help me through this process? Some useful data: The output from alsa script run as root http://www.alsa-project.org/db/?f=adae8ebee1007043fe83414ac4972319e02255fa The command hda-jack-sense-test -a (with external mic in) Pin 0x14 (Internal Speaker): present = No Pin 0x15 (Green HP Out): present = Yes Pin 0x16 (Not connected): present = No Pin 0x17 (Not connected): present = No Pin 0x18 (Not connected): present = No Pin 0x19 (Not connected): present = No Pin 0x1a (Not connected): present = No Pin 0x1b (Not connected): present = No Pin 0x1c (Not connected): present = No Pin 0x1d (Not connected): present = No Pin 0x1e (Not connected): present = No Pin 0x1f (Not connected): present = No Most likely the chip is Realtek ALC885 (compare also ALC889A) http://guide-images.ifixit.net/igi/bBTSqaeK5JpQ1AWe.large , although at the moment alsa reads it as ALC889A Takashi Iwai's tutorial https://www.kernel.org/doc/Documentation/sound/alsa/HD-Audio.txt Some people researched the original files from a running OS X installation on this same model (I think the relevant files are AppleHDA.kext/Contents/MacOS/AppleHDA AppleHDA.kext/Contents/PlugIns/AppleHDAHardwareConfigDriver.kext/Contents/Info.p????list AppleHDA.kext/Contents/Resources/layout12.xml.zlib AppleHDA.kext/Contents/Resources/Platforms.xml.zlib) http://www.insanelymac.com/forum/topic/220090-alc889a-pin-configuration/#entry1554954 Datasheet http://www.realtek.info/pdf/ALC885_1-1.pdf (from the same Realtek, one can also try to download Linux driver, but this is just taken from ALSA project, as stated in the readme file.) Compare with this Arch guy http://www.alsa-project.org/db/?f=3ca8243c0626844f0264a3faad0aa72018bc14f4 Here for the first time support to audio (except mics) for mba1,2 (which is morally the same as 1,1) is patched into the kernel http://www.alsa-project.org/pipermail/alsa-devel/2010-February/025511.html The same jack supposedly works both for HP and ext MIC, I think it's called TRRS, and it's the same as the one used e.g. for iphones This guy might have done a similar job, though to a more recent version and for sound globally, not just mics: http://blogs.aerys.in/jeanmarc-leroux/2013/09/15/fixing-2013-macbook-air-ubuntu-sound-issue/ (this is mirror to http://unix.stackexchange.com/questions/73044/microphones-not-working-on-apple-macbook-air-1-1-early-2008-under-linux )

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  • C Programming: malloc() for a 2D array (using pointer-to-pointer)

    - by vikramtheone
    Hi Guys, yesterday I had posted a question: How should I pass a pointer to a function and allocate memory for the passed pointer from inside the called function? From the answers I got, I was able to understand what mistake I was doing. I'm facing a new problem now, can anyone help out with this? I want to dynamically allocate a 2D array, so I'm passing a Pointer-to-Pointer from my main() to another function called alloc_2D_pixels(...), where I use malloc(...) and for(...) loop to allocate memory for the 2D array. Well, after returning from the alloc_2D_pixels(...) function, the pointer-to-pointer still remains NULL, so naturally, when I try accessing or try to free(...) the Pointer-to-Pointer, the program hangs. Can anyone suggest me what mistakes I'm doing here? Help!!! Vikram SOURCE: main() { unsigned char **ptr; unsigned int rows, cols; if(alloc_2D_pixels(&ptr, rows, cols)==ERROR) // Satisfies this condition printf("Memory for the 2D array not allocated"); // NO ERROR is returned if(ptr == NULL) // ptr is NULL so no memory was allocated printf("Yes its NULL!"); // Because ptr is NULL, with any of these 3 statements below the program HANGS ptr[0][0] = 10; printf("Element: %d",ptr[0][0]); free_2D_alloc(&ptr); } signed char alloc_2D_pixels(unsigned char ***memory, unsigned int rows, unsigned int cols) { signed char status = NO_ERROR; memory = malloc(rows * sizeof(unsigned char** )); if(memory == NULL) { status = ERROR; printf("ERROR: Memory allocation failed!"); } else { int i; for(i = 0; i< cols; i++) { memory[i] = malloc(cols * sizeof(unsigned char)); if(memory[i]==NULL) { status = ERROR; printf("ERROR: Memory allocation failed!"); } } } // Inserted the statements below for debug purpose only memory[0][0] = (unsigned char)10; // I'm able to access the array from printf("\nElement %d",memory[0][0]); // here with no problems return status; } void free_2D_pixels(unsigned char ***ptr, unsigned int rows) { int i; for(i = 0; i < rows; i++) { free(ptr[i]); } free(ptr); }

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  • Programming a callback function within a jQuery plugin

    - by ILMV
    I'm writing a jQuery plug-in so I can reuse this code in many places as it is a very well used piece of code, the code itself adds a new line to a table which has been cloned from a hidden row, it continues to perform a load of manipulations on the new row. I'm currently referencing it like this: $(".abc .grid").grid(); But I want to include a callback so each area the plug-in is called from can do something a bit more unique when the row has been added. I've used the jQuery AJAX plug-in before, so have used the success callback function, but cannot understand how the code works in the background. Here's what I want to achieve: $(".abc .grid").grid({ row_added: function() { // do something a bit more specific here } }); Here's my plug-in code (function($){ $.fn.extend({ //pass the options variable to the function grid: function() { return this.each(function() { grid_table=$(this).find('.grid-table > tbody'); grid_hidden_row=$(this).find('.grid-hidden-row'); //console.debug(grid_hidden_row); $(this).find('.grid-add-row').click(function(event) { /* * clone row takes a hidden dummy row, clones it and appends a unique row * identifier to the id. Clone maintains our jQuery binds */ // get the last id last_row=$(grid_table).find('tr:last').attr('id'); if(last_row===undefined) { new_row=1; } else { new_row=parseInt(last_row.replace('row',''),10)+1; } // append element to target, changes it's id and shows it $(grid_table).append($(grid_hidden_row).clone(true).attr('id','row'+new_row).removeClass('grid-hidden-row').show()); // append unique row identifier on id and name attribute of seledct, input and a $('#row'+new_row).find('select, input, a').each(function(id) { $(this).appendAttr('id','_row'+new_row); $(this).replaceAttr('name','_REPLACE_',new_row); }); // disable all the readonly_if_lines options if this is the first row if(new_row==1) { $('.readonly_if_lines :not(:selected)').attr('disabled','disabled'); } }); $(this).find('.grid-remove-row').click(function(event) { /* * Remove row does what it says on the tin, as well as a few other house * keeping bits and pieces */ // remove the parent tr $(this).parents('tr').remove(); // recalculate the order value5 //calcTotal('.net_value ','#gridform','#gridform_total'); // if we've removed the last row remove readonly locks row_count=grid_table.find('tr').size(); console.info(row_count); if(row_count===0) { $('.readonly_if_lines :disabled').removeAttr('disabled'); } }); }); } }); })(jQuery); I've done the usually searching on elgooG... but I seem to be getting a lot of noise with little result, any help would be greatly appreciated. Thanks!

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  • Illegal Instruction When Programming C++ on Linux

    - by remagen
    Heyo, My program, which does exactly the same thing every time it runs (moves a point sprite into the distance) will randomly fail with the text on the terminal 'Illegal Instruction'. My googling has found people encountering this when writing assembly which makes sense because assembly throws those kinds of errors. But why would g++ be generating an illegal instruction like this? It's not like I'm compiling for Windows then running on Linux (which even then, as long as both are on x86 shouldn't AFAIK cause an Illegal Instruction). I'll post the main file below. I can't reliably reproduce the error. Although, if I make random changes (add a space here, change a constant there) that force a recompile I can get a binary which will fail with Illegal Instruction every time it is run, until I try setting a break point, which makes the illegal instruction 'dissapear'. :( #include <stdio.h> #include <stdlib.h> #include <GL/gl.h> #include <GL/glu.h> #include <SDL/SDL.h> #include "Screen.h" //Simple SDL wrapper #include "Textures.h" //Simple OpenGL texture wrapper #include "PointSprites.h" //Simple point sprites wrapper double counter = 0; /* Here goes our drawing code */ int drawGLScene() { /* These are to calculate our fps */ static GLint T0 = 0; static GLint Frames = 0; /* Move Left 1.5 Units And Into The Screen 6.0 */ glLoadIdentity(); glTranslatef(0.0f, 0.0f, -6); glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT | GL_STENCIL_BUFFER_BIT); glEnable(GL_POINT_SPRITE_ARB); glTexEnvi(GL_POINT_SPRITE, GL_COORD_REPLACE, GL_TRUE); glBegin( GL_POINTS ); /* Drawing Using Triangles */ glVertex3d(0.0,0.0, 0); glVertex3d(1.0,0.0, 0); glVertex3d(1.0,1.0, counter); glVertex3d(0.0,1.0, 0); glEnd( ); /* Finished Drawing The Triangle */ /* Move Right 3 Units */ /* Draw it to the screen */ SDL_GL_SwapBuffers( ); /* Gather our frames per second */ Frames++; { GLint t = SDL_GetTicks(); if (t - T0 >= 50) { GLfloat seconds = (t - T0) / 1000.0; GLfloat fps = Frames / seconds; printf("%d frames in %g seconds = %g FPS\n", Frames, seconds, fps); T0 = t; Frames = 0; counter -= .1; } } return 1; } GLuint objectID; int main( int argc, char **argv ) { Screen screen; screen.init(); screen.resize(800,600); LoadBMP("./dist/Debug/GNU-Linux-x86/particle.bmp"); InitPointSprites(); while(true){drawGLScene();} }

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  • Issue Displaying/Hiding Views (Obj-C iPhone Programming)

    - by roswell
    All right all, So I've got a UITableView that is inited in applicationDidFinishLaunching like so: [self showForumList]; Said method does this: -(void)showForumList { ForumList *fl = [ForumList alloc]; [fl initWithNibName:@"ForumList" bundle:[NSBundle mainBundle]]; self.ForumList = fl; [window addSubview:[self.ForumList view]]; [fl release]; }where self.ForumList is previously defined in the interface as ForumList *ForumList;, etc. Now, in ForumList (itself an extension of UITableViewController obviously), I've got didSelectRowAtIndexPath: -- within it I have the following code: Forum *f = [Forum alloc]; NSArray *forums = [f getForumList]; NSDictionary *selectedForum = [forums objectAtIndex:[indexPath row]]; NSString *Url = [selectedForum objectForKey:@"url"]; NSString *Username = [selectedForum objectForKey:@"username"]; NSString *Password = [selectedForum objectForKey:@"password"]; NSLog(@"Identified press on forum %@ (%@/%@)", Url, Username, Password); [self.globalDelegate showForumListFromForumUsingUrl:Url username:Username password:Password]; [self.globalDelegate closeForumList]; NSLog(@"ForumListFromForum init"); Both of the NSLog calls in this function are executed and perform as they should. Now, here is where the issue starts. self.globalDelegate is defined as AppDelegate *globalDelegate; in the Interface specification in my header file. However, [self.globalDelegate showForumListFromForumUsingUrl:username:password] and and [self.globalDelegate closeForumList] are never actually called. They look like so: -(void)closeForumList { NSLog(@"Hiding forum list"); [[self.ForumList view] removeFromSuperview]; } -(void)showForumListFromForumUsingUrl:(NSString *)Url username:(NSString *)Username password:(NSString *)Password { NSLog(@"Showing forum list from forum"); ForumListFromForum *fl = [ForumListFromForum alloc]; [fl initWithNibName:@"ForumListFromForum" bundle:[NSBundle mainBundle]]; [fl initFromForumWithUrl:Url username:Username password:Password]; self.ForumListFromForum = fl; [window addSubview:[self.ForumListFromForum view]]; [fl release]; } The app does not respond to my press and neither of these NSLog calls are made. Any idea where I've gone wrong?

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  • 'Good' programming form in maintaining / updating / accessing files by entry

    - by zhermes
    Basic Question: If I'm storying/modifying data, should I access elements of a file by index hard-coded index, i.e. targetFile.getElement(5); via a hardcoded identifier (internally translated into index), i.e. target.getElementWithID("Desired Element"), or with some intermediate DESIRED_ELEMENT = 5; ... target.getElement(DESIRED_ELEMENT), etc. Background: My program (c++) stores data in lots of different 'dataFile's. I also keep a list of all of the data-files in another file---a 'listFile'---which also stores some of each one's properties (see below, but i.e. what it's name is, how many lines of information it has etc.). There is an object which manages the data files and the list file, call it a 'fileKeeper'. The entries of a listFile look something like: filename , contents name , number of lines , some more numbers ... Its definitely possible that I may add / remove fields from this list --- but in general, they'll stay static. Right now, I have a constant string array which holds the identification of each element in each entry, something like: const string fileKeeper::idKeys[] = { "FileName" , "Contents" , "NumLines" ... }; const int fileKeeper::idKeysNum = 6; // 6 - for example I'm trying to manage this stuff in 'good' programatic form. Thus, when I want to retrieve the number of lines in a file (for example), instead of having a method which just retrieves the '3'rd element... Instead I do something like: string desiredID = "NumLines"; int desiredIndex = indexForID(desiredID); string desiredElement = elementForIndex(desiredIndex); where the function indexForID() goes through the entries of idKeys until it finds desiredID then returns the index it corresponds to. And elementForIndex(index) actually goes into the listFile to retrieve the index'th element of the comma-delimited string. Problem: This still seems pretty ugly / poor-form. Is there a way I should be doing this? If not, what are some general ways in which this is usually done? Thanks!

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  • Synchronize Active Directory to Database

    - by Tommy Jakobsen
    We are in a situation where we would like to offer our customers to be able to manage their users themselves. It is around 300 customers with up to a total of 10.000 users. Besides creating, updating and removing users, they will very often read information about users for statics and other useful informations available. All this functionality, should be available from an Intranet web page (.NET Framework 4) that the users will access through Citrix or similar. Now the problem is that we would really like the users not to query AD directly for each request, but rather make them hit a database that is synchronized with AD. It would be sufficient to run this synchronization a few time each day (maybe every 5. hour). When they create a user, it should not be available right away, but reviewed and then created within two days (the next step would be to remove this manual review, but that's out of scope for this question). What do you think about this synchronization of AD? Does anyone have any experience with it and is it something that is done in other organizations, where you will have lots of requests which is better handled by a database than AD (I presume)? Are there any techniques out there for writing such a script that synchronizes AD with database tables? My primary concern is the groups/members relations which can be rather complicated. Or are there software that synchronizes AD with a database? Any comments will be much appreciated. Thank you.

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  • Which programming idiom to choose for this open source library?

    - by Walkman
    I have an interesting question about which programming idiom is easier to use for beginner developers writing concrete file parsing classes. I'm developing an open source library, which one of the main functionality is to parse plain text files and get structured information from them. All of the files contains the same kind of information, but can be in different formats like XML, plain text (each of them is structured differently), etc. There are a common set of information pieces which is the same in all (e.g. player names, table names, some id numbers) There are formats which are very similar to each other, so it's possible to define a common Base class for them to facilitate concrete format parser implementations. So I can clearly define base classes like SplittablePlainTextFormat, XMLFormat, SeparateSummaryFormat, etc. Each of them hints the kind of structure they aim to parse. All of the concrete classes should have the same information pieces, no matter what. To be useful at all, this library needs to define at least 30-40 of these parsers. A couple of them are more important than others (obviously the more popular formats). Now my question is, which is the best programming idiom to choose to facilitate the development of these concrete classes? Let me explain: I think imperative programming is easy to follow even for beginners, because the flow is fixed, the statements just come one after another. Right now, I have this: class SplittableBaseFormat: def parse(self): "Parses the body of the hand history, but first parse header if not yet parsed." if not self.header_parsed: self.parse_header() self._parse_table() self._parse_players() self._parse_button() self._parse_hero() self._parse_preflop() self._parse_street('flop') self._parse_street('turn') self._parse_street('river') self._parse_showdown() self._parse_pot() self._parse_board() self._parse_winners() self._parse_extra() self.parsed = True So the concrete parser need to define these methods in order in any way they want. Easy to follow, but takes longer to implement each individual concrete parser. So what about declarative? In this case Base classes (like SplittableFormat and XMLFormat) would do the heavy lifting based on regex and line/node number declarations in the concrete class, and concrete classes have no code at all, just line numbers and regexes, maybe other kind of rules. Like this: class SplittableFormat: def parse_table(): "Parses TABLE_REGEX and get information" # set attributes here def parse_players(): "parses PLAYER_REGEX and get information" # set attributes here class SpecificFormat1(SplittableFormat): TABLE_REGEX = re.compile('^(?P<table_name>.*) other info \d* etc') TABLE_LINE = 1 PLAYER_REGEX = re.compile('^Player \d: (?P<player_name>.*) has (.*) in chips.') PLAYER_LINE = 16 class SpecificFormat2(SplittableFormat): TABLE_REGEX = re.compile(r'^Tournament #(\d*) (?P<table_name>.*) other info2 \d* etc') TABLE_LINE = 2 PLAYER_REGEX = re.compile(r'^Seat \d: (?P<player_name>.*) has a stack of (\d*)') PLAYER_LINE = 14 So if I want to make it possible for non-developers to write these classes the way to go seems to be the declarative way, however, I'm almost certain I can't eliminate the declarations of regexes, which clearly needs (senior :D) programmers, so should I care about this at all? Do you think it matters to choose one over another or doesn't matter at all? Maybe if somebody wants to work on this project, they will, if not, no matter which idiom I choose. Can I "convert" non-programmers to help developing these? What are your observations? Other considerations: Imperative will allow any kind of work; there is a simple flow, which they can follow but inside that, they can do whatever they want. It would be harder to force a common interface with imperative because of this arbitrary implementations. Declarative will be much more rigid, which is a bad thing, because formats might change over time without any notice. Declarative will be harder for me to develop and takes longer time. Imperative is already ready to release. I hope a nice discussion will happen in this thread about programming idioms regarding which to use when, which is better for open source projects with different scenarios, which is better for wide range of developer skills. TL; DR: Parsing different file formats (plain text, XML) They contains same kind of information Target audience: non-developers, beginners Regex probably cannot be avoided 30-40 concrete parser classes needed Facilitate coding these concrete classes Which idiom is better?

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  • Oracle MAA Part 1: When One Size Does Not Fit All

    - by JoeMeeks
    The good news is that Oracle Maximum Availability Architecture (MAA) best practices combined with Oracle Database 12c (see video) introduce first-in-the-industry database capabilities that truly make unplanned outages and planned maintenance transparent to users. The trouble with such good news is that Oracle’s enthusiasm in evangelizing its latest innovations may leave some to wonder if we’ve lost sight of the fact that not all database applications are created equal. Afterall, many databases don’t have the business requirements for high availability and data protection that require all of Oracle’s ‘stuff’. For many real world applications, a controlled amount of downtime and/or data loss is OK if it saves money and effort. Well, not to worry. Oracle knows that enterprises need solutions that address the full continuum of requirements for data protection and availability. Oracle MAA accomplishes this by defining four HA service level tiers: BRONZE, SILVER, GOLD and PLATINUM. The figure below shows the progression in service levels provided by each tier. Each tier uses a different MAA reference architecture to deploy the optimal set of Oracle HA capabilities that reliably achieve a given service level (SLA) at the lowest cost.  Each tier includes all of the capabilities of the previous tier and builds upon the architecture to handle an expanded fault domain. Bronze is appropriate for databases where simple restart or restore from backup is ‘HA enough’. Bronze is based upon a single instance Oracle Database with MAA best practices that use the many capabilities for data protection and HA included with every Oracle Enterprise Edition license. Oracle-optimized backups using Oracle Recovery Manager (RMAN) provide data protection and are used to restore availability should an outage prevent the database from being able to restart. Silver provides an additional level of HA for databases that require minimal or zero downtime in the event of database instance or server failure as well as many types of planned maintenance. Silver adds clustering technology - either Oracle RAC or RAC One Node. RMAN provides database-optimized backups to protect data and restore availability should an outage prevent the cluster from being able to restart. Gold raises the game substantially for business critical applications that can’t accept vulnerability to single points-of-failure. Gold adds database-aware replication technologies, Active Data Guard and Oracle GoldenGate, which synchronize one or more replicas of the production database to provide real time data protection and availability. Database-aware replication greatly increases HA and data protection beyond what is possible with storage replication technologies. It also reduces cost while improving return on investment by actively utilizing all replicas at all times. Platinum introduces all of the sexy new Oracle Database 12c capabilities that Oracle staff will gush over with great enthusiasm. These capabilities include Application Continuity for reliable replay of in-flight transactions that masks outages from users; Active Data Guard Far Sync for zero data loss protection at any distance; new Oracle GoldenGate enhancements for zero downtime upgrades and migrations; and Global Data Services for automated service management and workload balancing in replicated database environments. Each of these technologies requires additional effort to implement. But they deliver substantial value for your most critical applications where downtime and data loss are not an option. The MAA reference architectures are inherently designed to address conflicting realities. On one hand, not every application has the same objectives for availability and data protection – the Not One Size Fits All title of this blog post. On the other hand, standard infrastructure is an operational requirement and a business necessity in order to reduce complexity and cost. MAA reference architectures address both realities by providing a standard infrastructure optimized for Oracle Database that enables you to dial-in the level of HA appropriate for different service level requirements. This makes it simple to move a database from one HA tier to the next should business requirements change, or from one hardware platform to another – whether it’s your favorite non-Oracle vendor or an Oracle Engineered System. Please stay tuned for additional blog posts in this series that dive into the details of each MAA reference architecture. Meanwhile, more information on Oracle HA solutions and the Maximum Availability Architecture can be found at: Oracle Maximum Availability Architecture - Webcast Maximize Availability with Oracle Database 12c - Technical White Paper

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  • Ubuntu 12.04 host – Virtualbox 4.1.12 Guest=Windows 7 – Network will not connect

    - by user287529
    Ubuntu 12.04 host – Virtualbox 4.1.12 Guest=Windows 7 – Network will not connect. I'm using Ubuntu 12.04 on an Acer Aspire 5742-7645 laptop with 4GB memory, Intel Core i3 processor, Intel HD Graphics, DVD drive, 802.1 b/g/n, and 500 GB HD. I connect to my router via a wireless connection. I have installed Virutalbox 4.1.12 from the Ubuntu Software Center and installed Guest additions 4.1.12 in the Windows 7 guest session. I have Windows XP and Windows 7 installed as guests in Virtual box The network settings are different for XP and 7 – see below. Network Settings XP guest = Adapter 1: PCnet-FAST III (NAT) - Network works perfectly and has worked well for several years. Network Settings Win 7 = Adapter 1: Intel PRO/1000 MT Desktop (Bridged adapter, eth1) Promiscuous Mode = allow all Cable connected = checked When I originally installed Windows 7, I tried NAT and the guest network would not connect. Once I changed the setting to the above (Bridged) the Network worked perfectly. However, what I believe is after updates (not sure if it was an Ubuntu or Windows update) the guest network stopped working and I can not get it to connect. Interfaces file content auto lo iface lo inet loopback Ifconfig yields lou@lou-Aspire-5742:~$ ifconfig eth0 Link encap:Ethernet HWaddr 1c:75:08:09:f6:5c UP BROADCAST MULTICAST MTU:1500 Metric:1 RX packets:0 errors:0 dropped:0 overruns:0 frame:0 TX packets:0 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:0 (0.0 B) TX bytes:0 (0.0 B) Interrupt:16 eth1 Link encap:Ethernet HWaddr 4c:0f:6e:7c:9f:01 inet addr:192.168.1.104 Bcast:192.168.1.255 Mask:255.255.255.0 inet6 addr: fe80::4e0f:6eff:fe7c:9f01/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:18095 errors:2 dropped:0 overruns:0 frame:24344 TX packets:9281 errors:47 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:5301926 (5.3 MB) TX bytes:1441885 (1.4 MB) Interrupt:17 lo Link encap:Local Loopback inet addr:127.0.0.1 Mask:255.0.0.0 inet6 addr: ::1/128 Scope:Host UP LOOPBACK RUNNING MTU:16436 Metric:1 RX packets:3208 errors:0 dropped:0 overruns:0 frame:0 TX packets:3208 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:294088 (294.0 KB) TX bytes:294088 (294.0 KB) Ipconfig yields the following: Windows IP Configuration Ethernet adapter Local Area Connection: Connection-specific DNS Suffix . : Link-local IPv6 Address . . . . . : fe80::38ba:dbca:a21d:c3d1%13 Autoconfiguration IPv4 Address. . : 169.254.195.209 Subnet Mask . . . . . . . . . . . : 255.255.0.0 Default Gateway . . . . . . . . . : Tunnel adapter isatap.{B292E440-679D-4FC5-8E34-77D6804669C8}: Media State . . . . . . . . . . . : Media disconnected Connection-specific DNS Suffix . : Tunnel adapter Local Area Connection* 11: Media State . . . . . . . . . . . : Media disconnected Connection-specific DNS Suffix . : I'm not sure what else to do. Can someone provide the troubleshooting steps to determine what the problem is and possible solution?

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  • Programming an Android Button to update EditText views

    - by bergler77
    Ok guys, I have a button in android that i'm trying to use to update 8 EditText Views with different random numbers. Everything works up until I click the button. It appears I am missing a resource according to the debugger, but I'm not sure what. I've tried several different ways of implementing the button. Here is what I have after looking at several posts. import java.util.Random; import android.os.Bundle; import android.view.View; import android.view.View.OnClickListener; import android.widget.Button; import android.widget.EditText; public class MyCharNewChar extends MyCharActivity { private OnClickListener randomButtonListener = new OnClickListener(){ public void onClick(View v) { //Button creates a set of random numbers and updates the values //of the EditText views. Random rand = new Random(); int STR = 1 + rand.nextInt(12); int AGI = 1 + rand.nextInt(12); int DEX = 1 + rand.nextInt(12); int WIS = 1 + rand.nextInt(12); int INT = 1 + rand.nextInt(12); int CON = 1 + rand.nextInt(12); int HP = 1 + rand.nextInt(20); int AC = 1 + rand.nextInt(6); EditText str = (EditText) findViewById(R.id.str); str.setText(STR); EditText agi = (EditText) findViewById(R.id.agi); agi.setText(AGI); EditText dex = (EditText) findViewById(R.id.dex); dex.setText(DEX); EditText wis = (EditText) findViewById(R.id.wis); wis.setText(WIS); EditText intel = (EditText) findViewById(R.id.intel); intel.setText(INT); EditText con = (EditText) findViewById(R.id.con); con.setText(CON); EditText hp = (EditText) findViewById(R.id.baseHP); hp.setText(HP); EditText ac = (EditText) findViewById(R.id.baseAC); ac.setText(AC); } }; @Override public void onCreate(Bundle savedInstanceState){ super.onCreate(savedInstanceState); setContentView(R.layout.newchar); Button randomButton = (Button) findViewById(R.id.randomButton); randomButton.setOnClickListener(randomButtonListener); } } Here is the xml: <?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:id="@+id/linearlayoutNew1" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical" android:background="@drawable/background" > <TextView android:id="@+id/newCharLabel" android:layout_width="match_parent" android:layout_height="wrap_content" android:text="@string/new_character_screen" android:textSize="24dp" android:textColor="@color/splash" android:textStyle="bold" android:gravity="center"/> <TextView android:id="@+id/nameLabel" android:layout_width="match_parent" android:layout_height="wrap_content" android:text="@string/nameLabel" android:textSize="18dp" android:textColor="@color/splash"/> <EditText android:id="@+id/editText1" android:layout_width="match_parent" android:layout_height="wrap_content" android:ems="10" android:inputType="textPersonName" > <requestFocus /> </EditText> <TableLayout android:id="@+id/statsLayout" android:layout_width="match_parent" android:layout_height="wrap_content" android:padding="5dp"> <TableRow android:id="@+id/tableRow01" android:orientation="horizontal" android:layout_width="match_parent" android:layout_height="wrap_content" android:padding="5dp"> <TextView android:id="@+id/strLabel" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="@string/strLabel" android:textSize="18dp" android:textColor="@color/splash"/> <EditText android:id="@+id/str" android:layout_width="wrap_content" android:layout_height="wrap_content" android:ems="3" android:inputType="number" /> <TextView android:id="@+id/agiLabel" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="@string/agiLabel" android:textSize="18dp" android:textColor="@color/splash"/> <EditText android:id="@+id/agi" android:layout_width="wrap_content" android:layout_height="wrap_content" android:ems="3" android:inputType="number"/> <TextView android:id="@+id/dexLabel" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="@string/dexLabel" android:textSize="18dp" android:textColor="@color/splash"/> <EditText android:id="@+id/dex" android:layout_width="wrap_content" android:layout_height="wrap_content" android:ems="3" android:inputType="number"/> </TableRow> <TableRow android:id="@+id/tableRow02" android:orientation="horizontal" android:layout_width="match_parent" android:layout_height="wrap_content" android:padding="5dp"> <TextView android:id="@+id/intLabel" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="@string/intLabel" android:textSize="18dp" android:textColor="@color/splash"/> <EditText android:id="@+id/intel" android:layout_width="wrap_content" android:layout_height="wrap_content" android:ems="3" android:inputType="number"/> <TextView android:id="@+id/wisLabel" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="@string/wisLabel" android:textSize="18dp" android:textColor="@color/splash"/> <EditText android:id="@+id/wis" android:layout_width="wrap_content" android:layout_height="wrap_content" android:ems="3" android:inputType="number"/> <TextView android:id="@+id/conLabel" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="@string/conLabel" android:textSize="18dp" android:textColor="@color/splash"/> <EditText android:id="@+id/con" android:layout_width="wrap_content" android:layout_height="wrap_content" android:ems="3" android:inputType="number"/> </TableRow> </TableLayout> <LinearLayout android:id="@+id/linearlayoutNew02" android:layout_width="match_parent" android:layout_height="wrap_content" android:padding="5dp" android:gravity="center"> <TextView android:id="@+id/baseHPLabel" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="@string/hpLabel" android:textSize="18dp" android:textColor="@color/splash"/> <EditText android:id="@+id/baseHP" android:layout_width="wrap_content" android:layout_height="wrap_content" android:ems="3" android:inputType="number"/> <TextView android:id="@+id/baseACLabel" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="@string/acLabel" android:textSize="18dp" android:textColor="@color/splash"/> <EditText android:id="@+id/baseAC" android:layout_width="wrap_content" android:layout_height="wrap_content" android:ems="3" android:inputType="number"/> </LinearLayout> <LinearLayout android:id="@+id/linearlayoutNew03" android:layout_width="match_parent" android:layout_height="wrap_content" android:orientation="horizontal"> <Button android:id="@+id/randomButton" android:layout_width="0dp" android:layout_height="wrap_content" android:layout_weight="1" android:text="@string/randomButton" android:textSize="16dp" android:clickable="true"/> </LinearLayout> </LinearLayout> I have also tried setting the onClick in xml to setup a specific onClick method. Still the same error so I must have a problem elsewhere. Any suggestions would be great!

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  • apache2 error Could not open configuration file /etc/apache2/conf.d/: No such file or directory

    - by Sundar Elumalai
    I have just upgraded my Ubuntu 13.10 and apache2 is not working. When I try to start the apache2 server it is printing following errors: * Starting web server apache2 * The apache2 configtest failed. Output of config test was: apache2: Syntax error on line 263 of /etc/apache2/apache2.conf: Could not open configuration file /etc/apache2/conf.d/: No such file or directory Action 'configtest' failed.

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  • NoSQL is not about object databases

    - by Bertrand Le Roy
    NoSQL as a movement is an interesting beast. I kinda like that it’s negatively defined (I happen to belong myself to at least one other such a-community). It’s not in its roots about proposing one specific new silver bullet to kill an old problem. it’s about challenging the consensus. Actually, blindly and systematically replacing relational databases with object databases would just replace one set of issues with another. No, the point is to recognize that relational databases are not a universal answer -although they have been used as one for so long- and recognize instead that there’s a whole spectrum of data storage solutions out there. Why is it so hard to recognize, by the way? You are already using some of those other data storage solutions every day. Let me cite a few: The file system Active Directory XML / JSON documents The Web e-mail Logs Excel files EXIF blobs in your photos Relational databases And yes, object databases It’s just a fact of modern life. Notice by the way that most of the data that you use every day is unstructured and thus mostly unsuitable for relational storage. It really is more a matter of recognizing it: you are already doing NoSQL. So what happens when for any reason you need to simultaneously query two or more of these heterogeneous data stores? Well, you build an index of sorts combining them, and that’s what you query instead. Of course, there’s not much distance to travel from that to realizing that querying is better done when completely separated from storage. So why am I writing about this today? Well, that’s something I’ve been giving lots of thought, on and off, over the last ten years. When I built my first CMS all that time ago, one of the main problems my customers were facing was to manage and make sense of the mountain of unstructured data that was constituting most of their business. The central entity of that system was the file system because we were dealing with lots of Word documents, PDFs, OCR’d articles, photos and static web pages. We could have stored all that in SQL Server. It would have worked. Ew. I’m so glad we didn’t. Today, I’m working on Orchard (another CMS ;). It’s a pretty young project but already one of the questions we get the most is how to integrate existing data. One of the ideas I’ll be trying hard to sell to the rest of the team in the next few months is to completely split the querying from the storage. Not only does this provide great opportunities for performance optimizations, it gives you homogeneous access to heterogeneous and existing data sources. For free.

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  • VIM does not detect syntax of .ssh/config

    - by Erik
    On a plain Ubuntu installation (12.04 in my case) when I have no ~/.vimrc VIM does not detect syntax of .ssh/config. Syntax highlighting works, but it does not set the correct filetype. vi ~/.ssh/config :set syn? >syntax=conf When I do: set syn=sshconfig Then the syntax highlighting is as it should be. Why isn't the filetype automatically identified? And how can it be set automatically?

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  • apt-get error, cannot install many packages?

    - by tech
    How do I fix this? It shows an error, and I don't know how to fix it. I want to install crossover. Reading package lists... Done Building dependency tree Reading state information... Done Correcting dependencies... failed. The following packages have unmet dependencies: crossover:i386 : Depends: libc6:i386 (>= 2.3) but it is not installed Depends: libice6:i386 but it is not installed or xlibs:i386 but it is not installable Depends: libsm6:i386 but it is not installed or xlibs:i386 but it is not installable Depends: libx11-6:i386 but it is not installed or xlibs:i386 but it is not installable Depends: libxext6:i386 but it is not installed or xlibs:i386 but it is not installable Depends: libfreetype6:i386 but it is not installed Depends: libz1:i386 Depends: perl5-base:i386 Depends: perl-modules:i386 but it is not installable Depends: python:i386 (>= 2.4) but it is not installed Depends: python-gtk2:i386 but it is not installed Depends: python-glade2:i386 but it is not installed Depends: desktop-file-utils:i386 but it is not installed Depends: libasound2:i386 but it is not installed Depends: libgl1:i386 Depends: libxrandr2:i386 but it is not installed E: Error, pkgProblemResolver::Resolve generated breaks, this may be caused by held packages. E: Unable to correct dependencies EDIT I have another recent error. You might want to run 'apt-get -f install' to correct these. The following packages have unmet dependencies: crossover:i386 : Depends: libc6:i386 (= 2.3) but it is not installed Depends: libice6:i386 but it is not installed or xlibs:i386 but it is not installable Depends: libsm6:i386 but it is not installed or xlibs:i386 but it is not installable Depends: libx11-6:i386 but it is not installed or xlibs:i386 but it is not installable Depends: libxext6:i386 but it is not installed or xlibs:i386 but it is not installable Depends: libfreetype6:i386 but it is not installed Depends: libz1:i386 Depends: perl5-base:i386 Depends: perl-modules:i386 but it is not installable Depends: python:i386 (= 2.4) but it is not installed Depends: python-gtk2:i386 but it is not installed Depends: python-glade2:i386 but it is not installed Depends: desktop-file-utils:i386 but it is not installed Depends: libasound2:i386 but it is not installed Depends: libgl1:i386 Depends: libxrandr2:i386 but it is not installed E: Unmet dependencies. Try using -f. running " apt-get -f install " gives me the same error everytime.

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  • nfs-kernel-server installation : file does not exist

    - by Stuti Rastogi
    I am extremely new to Ubuntu and need to work on EdX platform. I need to install the NFS Client on Ubuntu 12.04 for the same. I used the following stuti@stuti:/$ sudo apt-get install nfs-kernel-server However this gives me an error as follows: Reading package lists... Done Building dependency tree Reading state information... Done The following extra packages will be installed: nfs-common The following NEW packages will be installed: nfs-common nfs-kernel-server 0 upgraded, 2 newly installed, 0 to remove and 0 not upgraded. Need to get 0 B/355 kB of archives. After this operation, 1,222 kB of additional disk space will be used. Do you want to continue [Y/n]? y Selecting previously unselected package nfs-common. (Reading database ... 200367 files and directories currently installed.) Unpacking nfs-common (from .../nfs-common_1%3a1.2.5-3ubuntu3.1_i386.deb) ... Selecting previously unselected package nfs-kernel-server. Unpacking nfs-kernel-server (from .../nfs-kernel-server_1%3a1.2.5-3ubuntu3.1_i386.deb) ... Processing triggers for ureadahead ... Processing triggers for man-db ... Setting up nfs-common (1:1.2.5-3ubuntu3.1) ... statd start/running, process 4574 gssd stop/pre-start, process 4603 idmapd start/running, process 4643 Setting up nfs-kernel-server (1:1.2.5-3ubuntu3.1) ... update-rc.d: /etc/init.d/nfs-kernel-server: file does not exist dpkg: error processing nfs-kernel-server (--configure): subprocess installed post-installation script returned error exit status 1 No apport report written because MaxReports is reached already Errors were encountered while processing: nfs-kernel-server E: Sub-process /usr/bin/dpkg returned an error code (1) I have tried sudo apt-get autoremove nfs-kernel-server sudo apt-get autoremove nfs-common After these, I tried to install but I keep getting the same error. apt-get update or upgrade also do not help and give the same error. I am clueless as to where can I find this missing file as stated in the output. I tried to google about this problem but none of the solutions I came across have helped or I have not been able to understand some of them. Any help would really be appreciated. Thanks in advance for your time and attention.

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