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• Windows Server 2008 is stuck at "configuring updates - stage 3 of 3 - 0% complete"

  - by Chris

  This has happened the last two times I've done updates to this system, and I really have no idea what is going on. It is installing a only a month's worth of updates. It only responds to ping and no services are up, so I can't view the system remotely (I have to hook up a monitor to see this message). In the past I've just restarted the system at this point and it eventually finishes updating. I want to know what I can do to avoid this situation, how to diagnose what is going on, and how to get any kind of remote access during the updates. Edit: I can start the machine in safe mode (where I did nothing but backup some files). I restarted and it no longer tries to do a windows update, just goes to the desktop where everything seems extremely broken. I can click on some things, but not launch most programs. I guess all I can do at this point is do a system restore or something.

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• MongoDB: Replicate data in documents vs. “join”

  - by JavierCane

  Disclaimer: This is a question derived from this one. What do you think about the following example of use case? I have a table containing orders. These orders has a lot of related information needed by my current queries (think about the products; the buyer information; the region, country and state of the sale point; and so on) In order to think with a de-normalized approach, I don't have to put identifiers of these related items in my main orders collection. Instead, I have to repeat all the information for each order (ie: I will repeat the buyer's name, surname, etc. for each of its orders). Assuming the previous premise, I'm committing to maintain all the data related to an order without a lot of updates (because if I modify the buyer's name, I'll have to iterate through all orders updating the ones made by the same buyer, and as MongoDB blocks at a document level on updates, I would be blocking the entire order at the update moment). I'll have to replicate all the products' related data? (ie: category, maker and optional attributes like color, size…) What if a new feature is requested and I've to make a lot of queries with the products "as the entry point of the query"? (ie: reports showing the products' sales performance grouping by region, country, or whatever) Is it fair enough to apply the $unwind operation to my orders original collection? (What about the performance?) I should have to do another collection with these queries in mind and replicate again all the products' information (and their orders)? Wouldn't be better to store a product_id in the original orders collection in order to be more tolerable to requirements change? (What about emulating JOINs?) The optimal approach would be a mixed solution with a RDBMS system like MySQL in order to retrieve the complete data? I mean: store products, users, and location identifiers in the orders collection and have queries in MySQL like getAllUsersDataByIds in which I would perform a SELECT * FROM users WHERE user_id IN ( :identifiers_retrieved_from_the_mongodb_query )

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• Throwing and catching exceptions in the same function/method

  - by usr

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

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• Boundary conditions for testing

  - by Loggie

  Ok so in a programming test I was given the following question. Question 1 (1 mark) Spot the potential bug in this section of code: void Class::Update( float dt ) { totalTime += dt; if( totalTime == 3.0f ) { // Do state change m_State++; } } The multiple choice answers for this question were. a) It has a constant floating point number where it should have a named constant variable b) It may not change state with only an equality test c) You don't know what state you are changing to d) The class is named poorly I wrongly answered this with answer C. I eventually received feedback on the answers and the feedback for this question was Correct answer is a. This is about understanding correct boundary conditions for tests. The other answers are arguably valid points, but do not indicate a potential bug in the code. My question here is, what does this have to do with boundary conditions? My understanding of boundary conditions is checking that a value is within a certain range, which isn't the case here. Upon looking over the question, in my opinion, B should be the correct answer when considering the accuracy issues of using floating point values.

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• How to grant standard users access to disk partitions and flash storage?

  - by JK04

  I have a partition that I need standard users (not administrators)to have read/write access to. However, this partition does not even appear to them as it does to me as an administrator. How can I make it so that standard users can read/write to this partition? It would be nice if they could have the ability to mount it if needed. I have the same problem with removable media - if I have a flash card in the computer, the standard users cannot see this storage media.

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• Complex string matching with fuzzywuzzy

  - by That1Guy

  I'm attempting to write a process that matches obscure strings to a single 'master string' for further processing. I have a lot of data that looks something like this: Basketball Basket Ball Football BasketBallR BBall BBall - r FootB ...and so on. These need to be mapped to a master record like so: Basketball = Basket Ball, BBall Basketball - R = BasketBallR, BBall - r I also have instances of data resembling this format: Football -r FootBall - r-g/H,Q,HH These situations need to be separated into different categories before being mapped. For example FootBall - r-g/H,Q,HH should be: Football - r Football - g Football - H Football - Q Football - HH At this point, it still needs to be mapped to a master record... I've tried several different combinations of fuzzywuzzy matching methods, Levenshtein Distance measurements, regex, etc. and can't seem to find a reliable method to logically associate different naming styles of a single item with a master name. I'm throwing my hands up in desperation. Are there any existing python resources than can help sort out my problem? Are there other options? Can anybody point out an obvious option that I might have overlooked? Basically, any suggestion, solution, resource or alternative method is greatly appreciated.

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• Using .htaccess, can you hide the true URL?

  - by Richard Muthwill

  So I have a web hotel with 1 main website http://www.myrootsite.com/ and a few websites in subdirectories, in a folder called projects. I have domain names pointing to the subdirectories, but when holding the mouse over a link in those websites the URLs are shown as: http://www.myrootsite.com/projects/mysubsite/contact.html When I'm on mysubsite.com I want them to be shown as: http://www.mysubsite.com/contact.html I spoke to support for the web hotel and the guy said try using .htaccess, but I'm not sure exactly how to do this. Thank you very much for your time! Edit: For more information My website is: http://www.example1.com/ and I also own http://www.example2.com/. All of example2.com's files are in: example1.com/projects/example2/. When you visit example2.com, you'll notice all of the URL's point towards: example1.com/projects/example2/ but I want them to point towards: example2.com/ Can this be done? I hope this is enough info for you to go on :). Edit: For w3d I go to the url mysubsite.com and the browser shows the url mysubsite.com. The services I'm using create an iframe around myrootsite.com and use the url mysubsite.com I just hate that in Firefox and Internet Explorer, holding the mouse over link show that the destination url is: myrootsite.com/projects/mysubsite/...

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• partitioning ssd +hdd

  - by ALdaperan

  I recently bought an ssd drive 128 gb and i would like yo have your suggestions on partitiong and installing ubuntu 12.10 on it. First of all my drives are : HDD 640 Gb SSD Samsung 830 series 128 Gb Whats the best partitiong for theese drives ? 128 Gb is sure enormous amount of space only for / (root) . Is it a good choice if i make 2 partitions on ssd (20 Gb / and 100 /home) and leave hdd as backub drive for my data (files,movies,music etc) ? In this case what mount point must have hdd ? Can you suggest me the best partitiong for my drives ?

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• Why does Files (Nautilus) stopped updating partition's bookmarks?

  - by YuriC

  I've upgraded from 13.04 to 13.10 and noticed that Files (Nautilus) stopped updating my bookmarks that are located in another partition (an ext4 one). It used to work before. Testing, I've found out that, if I add any new bookmark (using CTRL + D, for example), Files then adds this new one and updates all bookmarks, showing that ones that point to my partition. I conclude that the feature (updating bookmarks) works, but it's not being executed when I mount my partition clicking on it. Any hints on how to solve this? Bookmarks really speed up everyday activities.

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• Allowing users to use their domain name to their profile?

  - by cappuccino

  I have a web site / app where each user as a profile i.e.: mydomain.com/user1 mydomain.com/user2 mydomain.com/user3 etc How do I allow it so that a user can use their own domain name to go to their profile as a rewrite not a redirect. So when they go to lets say: user1theirdomain.com they see there profile at mydomain.com/user1, but I don't want a redirect, I want it so their domain is seen in the address bar. I imagine the user will need to adjust there domain name DNS to point to my server, what are the correct procedures and what would I need to do from there? Also I wouldn't want to manually adjust things, I'd like it so when they point their domain to my server, my app will check the domain name, lookup the domain in my database and then serve the correct content. Any ideas?

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• Finite Numbers and ExplorerCanvas

  - by PhubarBaz

  I was working on my online mathematical graphing application, CloudGraph, and trying to make it work in IE. The app uses the HTML5 canvas element to draw graphs. Since IE doesn't support canvas yet I use ExplorerCanvas to provide that support for IE. However, it seems that when using excanvas, if you try to moveTo or drawTo a point that is not finite it loses it's mind and stops drawing anything else after that. I had no such problems in Firefox or Chrome so it took me awhile to figure out what was going on. Next I discovered that I needed a way to check if a variable was NaN or Inifinity or any other non-finite value so I could avoid calling moveTo() in that case. I started writing a long if statement, then I thought there has to be a better way. Sure enough there was. There just happens to be an isFinite() function built into Javascript just for this purpose. Who knew! It works great. Another difference I discovered with excanvas is that you must specify a starting point using a moveTo() when beginning a drawing path. Again, Chrome and Firefox are a lot more forgiving in this area so it took me a while to figure out why my lines weren't drawing. But, all is happy now and I'm a little wiser to the ways of the canvas.

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• Why doesn't the installer see all of my hard drives?

  - by atodd

  I'm trying to setup a dual boot system with Windows Vista 64 (already installed) and Ubuntu 10.10. I added a new drive which is identical to the one Vista is installed on. When I boot into the LiveCD I can see and mount the second drive and edit it in Gparted. However, when I use the installer it will only bring up the drive that already has Vista installed. I've tried everything I know. I'm not sure if its a BIOS setting or something else I've missed. I've also tried both the desktop and alternate amd64 installs with the same result.

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• How do I reduce package content on a custom install CD?

  - by Pete Ashdown

  I normally do all my installs via PXE server, but I'm building a custom CD for kvm installs that are not on the same vlan as my PXE server. I would prefer this CD was as small as possible and it fetched packages from the network like netinstall mini.iso CD does, but netinstall doesn't mount /cdrom like the server install CD does. I need the cdrom for preseed. I've got my custom server install CD working, but it is still ~700MB. Trying to modify "dists/lucid/main/binary-amd64/Packages.gz" gives me no love as it complains that I've got a corrupt Packages.gz no matter what I do. I'd rather the preseeded mirror was used rather than CD once it gets the cdrom setup. Any ideas?

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• Advice and resources on collaborative environments

  - by Tjaart

  I need some advice on collaborative software environments. More specifically, I am looking for books and reference materials that can aid me in understanding team and code structures and the interactions thereof. In other words books, blogs or white papers explaining: Different strategies for structuring teams that share common code between each other but have distinct individual functions? To summarise my question I would like to know what would be a good source of knowledge if I were to set up teams in an organisation that shared code but each unit still remained autonomous. I have done some research on this subject and explored: code review tools, distributed VCS, continuous integration tools, Unit testing automation. The tough part about implementing these tools are to determine where a good place would be to start, which tools are low hanging fruit, which tools or methods provide higher success rates. If someone asks me about code quality reference I point them to Code Complete. I am looking for an equivalent guide on software team structures and tools to make this equation work better. I realise that this question is quite vague but it arose as "we need to share code between teams without breaking each others stuff and causing management headaches and reams of red tape" The answer is definitely not simple and requires changes on many levels, hence the question. If the question is too vague please vote to close or delete. I would accept any good starting point as an answer.

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• software to monitor internet usage on an XP PC? (browser + non-browser)

  - by user39316

  Hi Is there any (ideally open source) software for Windows that can be used on a PC, to monitor the usage of internet from that PC? It would need to include both browser and non-browser sources (e.g. a service that sync's calendar to gmail). So any software on your PC that uses would need to be configured to point to this local internet monitoring software/proxy. The monitoring software/proxy then would be configured to point to the company proxy server (address, port & credentials). Things that come to mind that might be close but not really focused on solving this might be perhaps: Charles Proxy, Fiddler 2, SQUID? The idea would be it could give you a daily/weekly/monthly report of internet upload/download usage on a per program/process/service basis for the PC it is being run on. thanks

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• I can't delete a directory inside a junctioned directory

  - by Fredy Muñoz

  So this is the deal. A couple of days ago I moved my profile folder C:\Documents and Settings\fmunoz to a different drive D:\fmunoz. Today, I created a directory in my desktop using the point-and-click method: Right-click on an empty space in the desktop Select New Select Folder Leave the default name New Folder and press Enter I tried to delete the folder using the point-and-click method: Right-click the New Folder directory Select Delete After five seconds, I got the following message: --------------------------- Error Deleting File or Folder --------------------------- Cannot delete New Folder: Access is denied. Make sure the disk is not full or write-protected and that the file is not currently in use. --------------------------- Initially I thought that there must be some sort of indexing services locking the directory so I got a list of open files using the TuneUp Process Manager tool but the New Folder directory wasn't there. I double-clicked My Computer, navigated to the desktop directory C:\Documents and Settings\fmunoz\Destkop, tried to delete the New Folder directory using the same point-and-click method described above and got exactly the same message at the same amount of time. In the same window, I navigated to the actual location of the desktop directory D:\fmunoz\Desktop, tried to delete the New Folder directory and this time it worked. I thought that this behavior was due to some special treatment that Windows gives to the desktop or the profile directories so I tried doing the same thing with a different set of directories: Created a folder D:\dummy Created a junction C:\dummy pointing to D:\dummy Created a New Folder directory in C:\dummy Tried to delete New Folder from C:\dummy. Didn't work. Tried to delete New Folder from D:\dummy. It worked. I tried creating the folder in the actual directory rather than the junction directory: Created a New Folder directory in D:\dummy Tried to delete New Folder from C:\dummy. Didn't work. Tried to delete New Folder from D:\dummy. It worked. I also tried using the Delete button instead of using the Delete option of the context menu but it didn't work. When using the Shift+Delete sequence, it works. It also works by using the rd command in the console, but in both cases the deleted directory doesn't goes to the Recycle Bin, which is my intention when using the Delete context menu option or the Delete button.

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• UDK - How to make sure a PhysicalMaterial mask actually works?

  - by tomacmuni

  Hello, I have been reading the documentation for UDK about physical materials and masks. I have my 1bit BMP mask, and the two physical material assets I want to shoot off in the black and white channels. I have applied my material to both a rigid body and to a skeletal mesh and neither apparently uses the mask. If I assign a regular physical material (one that doesn't use a mask) then it will work fine, but this defeats the point because it gives only one hit reaction. In the documentation it states that it is possible to extend a class on which we want to use a physical material based on the KActor class's usage. How to do that? Here is the quote: "The following properties [ie, ImpactEffect - Particle system to spawn at the point of impact + ImpactSound - Sound to play when an impact occurs] allow you to attach sounds and effects to physical collisions. These only work on classes which support them, which at the moment is only KActor. By looking at the implementation in KActor though, you can add this functionality to other classes (or you can subclass KActor)." Essentially, how to make sure a PhysicalMaterial mask actually works? What code could be added to a skeletal mesh class perhaps, to get it going? Any help appreciated.

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• 25 years old and considering a career change...possible? practical?

  - by mq330

  Hi all, I'm new to this site and new to programming as well. I've spent some time going through an intro cs book that uses python as the language of choice. I find the exercises interesting and engaging and I generally have had a favorable experience programming so far. I've gone through some of the basics with python like writing simple programs, basics of GUIs, manipulating strings, lists, defining functions, etc. And I've always loved technology. Although I've never done any real hardcore programming yet, I was inclined to building websites from a very young age but I never really developed my skills. Now, the thing is I'm 25, I have my bacholors in environmental studies and two masters degrees in urban planning and landscape architecture respectively. I know, it would be quite a departure to pursue a career in programming at this point. Currently, I'm working as a geographic information systems intern. I've taken some GIS classes and have a lot of experience with making maps, doing spatial analysis etc. So what I'm thinking is maybe I can learn some solid programming skills and apply these skills in the field of GIS. From what I've seen, .net languages are the norm in this arena. Could you perhaps provide some guidance to me in terms of what languages I should focus on or courses I should take at this point? What about for building web mapping applications? Also, I was thinking about getting a certificate in programming from a university extension program. Do you think it would be worth it? And furthermore, do you think potential employers would be interested in hiring someone like me (once I get a couple of languages down pretty well) as an intern or in an entry level position? I'll be living in the bay area so I feel that there should be decent opportunities even though I don't have a b.s. in cs.

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• cant boot ubuntu after install (first time)

  - by user1683645

  Trying to install ubuntu for the first time. I use an usb stick. At partition I use one of the hdd's I have and create a partition of 50gb for ubuntu @ /dev/sda and the partitions name is dev/sda1 with type ext4. All is well and the installation is completed without any errors and I get a dialogue asking me to restart but ubuntu does not boot. I only have one device as boot in my bios and I think its the devide with ubuntu on it since I've not partitioned the other discs. When I create the partition I yse primary type and localtion for the new partition is att the beginning of the space. And I use Ext4 file system. Mount point is / What am I doing wrong?

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• Sending Emails from existing SMTP host from Ubuntu Server

  - by ezgoodnight

  I feel like my problem is very simple, but I've been trying for quite some time and haven't cracked it. You experienced server guys will probably laugh at this, but I'm finally at the point I need help or I'll never get anywhere. I have a little box running 12.04 LTS and I've wanted to script some status checks and have the server send me an email and schedule this with cron. I basically want a command line mail client that I can set up as easily as Thunderbird to send through my existing SMTP through the command line. Something that can easily be rolled into my bash scripts. I already have a remote host handling our email, SMTP, MTA, all that garbage. I don't particularly want to set up a relay just to send email when I have one that everyone else in the company already uses. I've tried, but there are too many aspects I don't understand AND I don't see why I should set up something local when we already pay for a remote host to do these things. If I absolutely have to set up sendmail or postfix, then so be it, but I'd appreciate a simple alternative. I'm open to practically anything at this point.

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• Replacing old server with new but different hostname & same IP

  - by MaxFr

  We have an old server 2000 and lots of users point to it by hostname and by its IP e.g \\server1, we have a new server 2008 R2 with new name serverlocation1 All folders and data have been sync'toy'd from the old server1 across to serverlocation1 each evening, the new server tree is exactly the same on the new server and all perms are correct. We need to make the new server the same IP as the old server1 as too many people access it directly via IP, and to ensure file and folder paths stay ok, anything \\server1\folder\file needs to go to \\newserverlocation1\folder\file etc I can change the old server1 name to server1-old & change IP and assign the old IP to the new server, but how do I force anything coming in for \\server1 to go to the new server and ensure anything referenced to the old server goes onto the new server ? I can CNAME but I need the new server to have the IP of the previous server so not sure if its straight forward etc..... point server1 to newserverlocation1 Then probably change DNS so that the OLD IP points to new hostname..... Any clarification appreciated.

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• How do you tell if advice from a senior developer is bad?

  - by learnjourney

  Recently, I started my first job as a junior developer and I have a more senior developer in charge of mentoring me in this small company. However, there are several times when he would give me advice on things that I just couldn't agree with (it goes against what I learned in several good books on the topic written by the experts, questions I asked on some Q&A sites also agree with me) and given our busy schedule, we probably have no time for long debates. So far, I have been trying to avoid the issue by listening to him, raising a counterpoint based on what I've learned as current good practices. He raises his original point again (most of the time he will say best practice, more maintainable but just didn't go further), I take a note (since he didn't raise a new point to counter my counterpoint), think about it and research at home, but don't make any changes (I'm still not convinced). But recently, he approached me yet again, saw my code and asked me why haven't I changed it to his suggestion. This is the 3rd time in 2--3 weeks. As a junior developer, I know that I should respect him, but at the same time I just can't agree with some of his advice. Yet I'm being pressured to make changes that I think will make the project worse. Of course as an inexperienced developer, I could be wrong and his way might be better, it may be 1 of those exception cases. My question is: what can I do to better judge if a senior developer's advice is good, bad or maybe it's (good but outdated in today context)? And if it is bad/outdated, what tactics can I use to not implement it his way despite his 'pressures' while maintaining the fact that I respect him as a senior?

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• Input prediction and server re-simultaion

  - by Lope

  I have read plenty of articles about multiplayer principles and I have basic client-server system set up. There is however one thing I am not clear on. When player enters input, it is sent to the server and steps back in time to check if what should have happened at the time of that input and it resimulates the world again. So far everything's clear. All articles took shooting as an example, because it is easy to explain and it is pretty straightforward, but I believe movement is more complicated. Imagine following situation: 2 players move towards each other. A------<------B Player A stops halfway towards the collision point, but there is lag spike so the command does not arrive on the server for a second or so. Current state of the world on the server (and on the other clients as well) at the time when input arrives is this: [1]: -------AB------- The command arrives and we go back in time and re-simulate the world, the result is this: [2]: ---AB----------- Player A sees situation [2] which is correct, but the player is suddenly teleported from the position in [1] (center) to the position in [2]. Is this how this is supposed to work? Point of the client prediction is to give lagged player feeling that everything is smooth, not to ruin experience for other players. Alternative is to discard timestamp on the player's input and handle it when it arrives on the server without going back in time. This, however, creates even more severe problems for lagged player (even if he is lagging just a bit)

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• hi, i have a problem with windows 7 so I use ubuntu to bring back my files , but when I tried to open the files I have this message:

  - by user286972

  Error mounting /dev/sda1 at /media/ubuntu/B800C0C300C08A38: Command-line `mount -t "ntfs" -o "uhelper=udisks2,nodev,nosuid,uid=999,gid=999,dmask=0077,fmask=0177" "/dev/sda1" "/media/ubuntu/B800C0C300C08A38"' exited with non-zero exit status 13: ntfs_attr_pread_i: ntfs_pread failed: Input/output error Failed to read NTFS $Bitmap: Input/output error NTFS is either inconsistent, or there is a hardware fault, or it's a SoftRAID/FakeRAID hardware. In the first case run chkdsk /f on Windows then reboot into Windows twice. The usage of the /f parameter is very important! If the device is a SoftRAID/FakeRAID then first activate it and mount a different device under the /dev/mapper/ directory, (e.g. /dev/mapper/nvidia_eahaabcc1). Please see the 'dmraid' documentation for more details.

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• Configuring an Engenius 3500

  - by dsiddens

  The title speaks to only half of the issue: the other half are the settings in Ubuntu and the sequences therein. The computer in this issue does receive internet with the external antenna jack at the back being fed with a simple magnetic base antenna designed for putting on the roof of an automobile. However, that signal is weak and the Engenius with an external antenna (Rootenna ~15db gain) and ehternet wire will supply a stronger, faster signal. I've set the Engenius to the desired source and entered the correct WEP password. The lights on the Engenius indicate that it's connected to the access point. At the Ubuntu side of this I've worked to no avail changing settings with "Edit Connections" to the point I'm Ask(ing)Ubuntu for help. I have and have RTFM for Engenius 3500 There is an embarrassing side note to this issue: At one time I had the Engenius working! It seems that I can't recall the settings and sequences I used way back when. And I may as well confess to not knowing the Command Line. I'm a GUI guy. Thank you for your time, Doug

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