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• Is there an image viewer which *won't* show every file in the current folder?

  - by hawbsl

  Looking for a Windows image viewer which can be started from the command line but which allows me to specify/restrict which files I want it to page through. As parameters. The good 'ol Windows Picture Viewer would be fine except that it'll show/cycle through all the pictures in the current folder. In my case I want to say something like: someimgvwr.exe "cat.jpg" "cow.jpg" "cub.jpg" so that only those three files will be displayed and not "pig.jpg" which might also happen to be there in the same folder. Actually, if it allowed something like this: someimgvwr.exe "c*.jpg" that would be even more perfect. Do any of the many image viewers that are out there allow such a thing?

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• Gentoo+urxvt+terminus: How do I change font version?

  - by gaidal

  In my Debian installation I can type extended ASCII characters such as åäö by default using the terminus font, however in Gentoo I can't get it to work so far. Nothing happens when I hit those keys, like in this thread: Missing glyphs in Terminus font, how to setup a fallback font ? But in this case I know terminus supports those characters in at least some of its versions, since it's works in Debian. So what I want is to find out how to see and choose which of the many different terminus font files is being used. I set the font in the same way on both Debian and Gentoo, using URxvt*font: xft:terminus:size=xx in .Xdefaults. Both systems use en_US.UTF-8 as default locale.

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• How to start Ubuntu with no working video card?

  - by ViliusK

  I have a laptop with broken video card. It has two operating systems installed - Windows 7 and Ubuntu 10.10 Desktop Edition. It has GRUB to manage which operating system to boot up. Windows is default OS. And Windows fails to boot up without video card. I'm checking with ping to the ports which are shown as used by DHCP in my router. Normal boot of Ubuntu also fails and it restarts after a while. But when I choose (blindly, but checking HDD indicator and by counting button presses when GRUB menu appears) to boot second option of Ubuntu (rescue mode) it starts and I can ping it. But when I try to connect to it through SSH, I'm getting "connection refused" error from putty. I've took out HDD from my laptop already and inserted it to WD Passport case so now I can connect it to other computer to edit configuration files. How can I check if SSH server is working? How to enable it in rescue mode? Or better, how to disable video card to be required while booting Ubuntu in normal mode?

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• Preventing - Large Number of Failed Login Attempts from IP

  - by Silver89

  I'm running a CentOS 6.3 server and currently receive emails entitled "Large Number of Failed Login Attempts from IP" from my server every 15 minutes or so. Surely with the below configured it should mean only the person using the (my static ip) should be able to even try and log in? If that's the case where are these remote unknown users trying to log into which is generating these emails? Current Security Steps: root login is only allowed without-password StrictModes yes SSH password login is disabled - PasswordAuthentication no SSH public keys are used SSH port has been changed to a number greater than 40k cPHulk is configured and running Logins limited to specific ip address cPanel and WHM limited to my static ip only hosts.allow sshd: (my static ip) vsftpd: (my static ip) whostmgrd: (my static ip) hosts.deny ALL : ALL

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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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• Is having a single `IndexWriter` instance in Lucene a good idea?

  - by Dragos

  I am trying to understand how Lucene should be used. From what I have read, creating an IndexReader is costly, so using a Search Manager shoulg be the right choice. However, a SearchManager should be produced by a NRTManager(which, by the way, should replace the IndexWriter for every add or delete operation performed). But in order to have a NRTManager, I should first have an IndexWriter, and here comes my problem. The documentation says: an IndexWriter is thread-safe the constructor of this class takes a Directory object, so it seems creating an instace should be costly(as in the case of an IndexReader) all changes are buffered and flushed periodically(so they seem to encourage using a single instance) but: the changes, although flushed will only be visible after commit or close after finished making updates(add/delete), the instance should be closed I also found this: http://stackoverflow.com/questions/5374419/forgot-to-close-the-lucene-indexwriter-after-adding-documents-to-the-index where it is said that not closing a writer might ruin everything So what am I really supposed to do? Is having a single IndexWriter instance a good idea (make only commit and never close it)? EDIT: What is more, if I use NRTManager, how can I make acommit`? Is it even possible?

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• Replace files with symlink

  - by soandos

  This question is intended to be the inverse of Replace Symbolic Links with Files, but for windows. I have started running out of space on my SSD drive, and I found that about 12% of used space is in my installer folder (holds the .msi files for all the programs that I have installed) I am looking for two things: A way to move this (or any) folder via symlink. Ideally, some powershell function that I could use to just designate a folder, a destination, and the symlink would be created in the original (pointing to the destination) In this particular case, a registry change that would allow the location to be move would also be helpful, but I would still prefer solution 1. How can this be done?

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• Vacant thumbnail spot persists on Chrome homepage, want to set it specific to a site

  - by 9dan

  I have a vacant thumbnail place in Google Chrome that I would like to set for a particular site. In this case, it's Facebook. When I visit a new website a new thumbnail is created for that site in the sixth spot. Wanting to place Facebook at the sixth location I deleted the new thumbnail and visited Facebook again. But the sixth place remains vacant no matter how often I visit Facebook. What can I do to set a specific thumbnail position a particular site?

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• How to kill an openvz container?

  - by johannes

  An openvz container can be stopped with vzctl stop <id> , but this needs the cooperation from the init inside the container. In case a container is compromised a way is needed to stop the container withouts its cooperation. Something like a vzctl kill <id> is needed which kills all processes inside the container and puts it into the stopped state. Such a kill command is not listed in the manpage. How can an openvz container be killed/stopped without needing it's cooperation?

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• Are these symptoms of a video card is dying?

  - by K Cloud

  What I am getting from my PC: Scrambled text in the boot menu. The scrambled text dissapears and everthing goes normal after several restarts, or the computer has worked for some time. Display goes blank showing, windows kernel mode driver stopped responding. Sometimes the windows just hangs, I need to restart the pc for that. There used to be some scrambled colors in my windows, so I cleaned up my video carda and port and reinstalled the video card, things are something right. The pc runs normally for hours in safe mode, as diffault display driver works at that case. My PC specs: Core 2 Duo processor 2 GB RAM NVIDIA EN210 SILENT GPU Windows 8 Drivers details: NVIDIA drivers - v331.65, told to be fully compatible with Win8 Currently I am installing Windows 7 and will be putting the older version of driver v320 to test, yet I'm really confused weather my GPU is dying or still on go.

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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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• How do I turn autocomplete on for a server running Windows Server 2008?

  - by user16011

  My end users are not able to use autocomplete when they use a web application hosted on a particular server. Autocomplete is usually a client-side setting. My users can use autocomplete when they are on other websites so I think it is a server setting in this case. How do I turn autocomplete on for a server running Windows Server 2008? Is this a setting in IIS, a registry setting, a group policy setting, or something else? Thanks in advance.

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• Web server suddenly stopped working

  - by wezten

  I have a web server, which was working fine. It also was an FTP server and a Windows Remote Desktop server, all working fine. Someone called our ISP to increase the internet speed, and suddenly nothing works - I can connect with Teamviewer, but HTTP, FTP & RD doesn't work. Disabled firewall. Ran Wireshark - the packets don't come through at all. Set the webserver to port 20111, in case the ISP is blocking port 80, and again, the packets didn't come through at all. (localhost:20111 works fine) Port forwarding is set up for ports 80, 21, 3389 & 20111 to 10.0.0.32 (which is the correct address - checked with ipconfig). Restarted router and computer. I would be very grateful for any help.

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• Snow Leopard, PHP, and MySQL

  - by Peter

  I have just installed Snow Leopard and now my PHP/MySQL program ends in a "Segmentation fault". I have been searching the web for a solution, I realize that there are some issues with SL/PHP/MySQL, but I have not found anything that works yet. I downloaded the binary MySQL package mysql-5.1.42-osx10.6-x86_64. I have updated the php.ini file as suggested at various posts. When I run PHP and connect to the MySQL server the behavior is a bit random. In many cases it works fine to connect and read data. In my specific case the PHP program constructs a LOAD DATA LOCAL INFILE ... statement to load data from a text file. It should do several such queries after each other in a loop. It works one time but the halts in a "Segmentation fault". The program worked fine in Leopard, but not now. My versions are: OS 10.6.2, PHP 5.3.0, MySQL 5.1.42

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• Lots of Internet browsing issues, all browsers

  - by dario_ramos

  Before the upgrade, everything was working fine. Now, however, I can connect to the Internet but a lot of stuff fails, and the weirdest thing is that it happens with Firefox, Chromium and Opera. Some of the things that fail: I can't log in to Stack Overflow, after entering user/pass it loads for a long time on Firefox and throws Error 408 (browser request timed out) on Chromium and Opera I can't log in to Hotmail, similar symptoms I can login to Facebook, but when I try to write a comment, or just post something in my wall, it stays loading for a long time, and then fails The first two issues seem to be related to secure pages, and the second one is another issue altogether, I believe. However, they all happen with all browsers, which is really weird. Talking about weird: I connect using a Huawei SmartAX MT 810 USB modem, which cost me blood and tears to get it working under Ubuntu. I ordered an ethernet modem/router with my ISP, and I'm still waiting, but this issue intrigues me anyway. Has anyone experienced this kind of problems? I Googled around, but couldn't find a similar case.

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• Proving file creation dates

  - by Nils Munch

  In a weird case surrounding copyrights of a software system I have developed, I use the fact that I have all the source files of the system in question, created long before I joined the company that claims to own the system. The company being sued by yours truely says that I have simply manipulated to files to appear to be from that date. Is it even possible to fake or manipulate creation dates ? And if so, how can I "prove" that the files really are that old ? Luckily, I stored my project on GitHub, whick confirmed the fact that the files are from that era, but that is besides the point. I run purely Apple OS X.

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• Mac OS X Lion (10.7.3) Virtual Machine?

  - by Ben Hooper

  I have been looking into this for a while and have attempted quite a few "solutions" (hackintosh boot images, universal unlockers, etc) before I gave in and asked for help. I know this is extremely difficult to accomplish, especially with an AMD CPU, but it has been done and it can't hurt to ask. Question Does anyone know of any way to actually get Mac OS X Lion (10.7.3) to boot in VMware Workstation 8.0.2? I know that Mac OS X is heavily dependant on hardware configuration, so I will post my PC's hardware below, if it helps. As far as I know it's only reliant on the CPU, but I will post it all just in case. PC Hardware Motherboard: ASUS M4A77T CPU: AMD Phenom II x4 955 Black Edition Graphics Card: Palit Sonic Platinum nVIDIA Geforce GTX 460 Memory: G-Skill [RipjawsX F3-12800CL9D-8GBXL] 8GB PSU: Arctic Power 700(W) Hard Drive: SAMSUNG HD204UI 2TB Thanks in advance. :)

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• enable hardware virtulization in BIOS

  - by rhon

  I am running a FOXCONN AM2+ M61PMV with an AMD Athlon II X2 240 windows 7 ultimate 64 bit From startup I have hit the del key and the options for enabling the Hardware virtulization are not there. I have checked the Microsoft tool that says I can run virtual and i have checked SecurAble, that says yes. But I have an open case w/microsoft (they've been trying for a week [7 tech support people later]) and they're saying that i need to ensure that the hardware is enabled. Where do I go to see? is there another way besides from the start up? HELP!

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• Advanced TSQL training

  - by Dave Ballantyne

  Over the past few years, Ive had it on my to do list to write and deliver and full-scale SQLServer training course and not just an hour long bite size session at user groups and conferences.  To me, SQLServer development is not just knowing and remembering the syntax of commands.  Sometimes I semi-jest that i have “Written a merge statement without looking up the syntax”, but I know from my interactions on and off line that I am far from alone in this.  In any case we have an awesome tool in the internet which is great at looking things up. When developing SQL Server based solutions,  of more importance is knowing the internals of the engine.  SQL Server is a complex piece of software and we need to be able to understand to a fairly low level ( you can always dive deeper ) the choices that it makes and why it makes them in order to deliver performant, reliable, predictable and scalable systems to our customers and end-users. This is the view i shall be taking over two days in March (19th and 20th) in London and ,TBH, one I dont see taken often enough. Early bird discounts are available until 31Dec. Full details of the course and a high level view of the bullet points we shall be covering are available at the Technitrain site ( http://tinyurl.com/TSQLTraining )

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• Why are graphics cards upside-down?

  - by gbjbaanb

  This is something that has always bugged me - when I install a card into a desktop (ie mini tower) case, the fan is always facing down. Surely, making the card so the components and fan is on the top would help a lot with cooling, allowing those whiney fans to spin a little slower. I know some card manufacturers tried to mitigate this by adding heat pipes and big heatsinks on the back of the card.. but they still put the bits on the same way as everyone else! So, does anyone know why they're all upside-down?

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• Stop ssh client from offering all the public keys it can find?

  - by Rory McCann

  Like most sysadmins I use openssh all the time. I have about a dozen ssh keys, I like to have a different ssh key for each host. However this causes a problem when I am connecting to a host for the first time, and all I have is a password. I want to just connect to the host using a password, no ssh key in this case. However the ssh client will offer all the public keys in my ~/.ssh/ (I know this from looking at the output of ssh -v). Since I have so many, I will get disconnected for too many authentication failures. Is there some way to tell my ssh client to not offer all the ssh keys?

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• How Do Computers Work? [closed]

  - by Rob P.

  This is almost embarrassing ask...I have a degree in Computer Science (and a second one in progress). I've worked as a full-time .NET Developer for nearly five years. I generally seem competent at what I do. But I Don't Know How Computers Work! Please, bare with me for a second. A quick Google of 'How a Computer Works' will yield lots and lots of results, but I struggled to find one that really answered what I'm looking for. I realize this is a huge, huge question, so really, if you can just give me some keywords or some direction. I know there are components....the power supply, the motherboard, ram, CPU, etc...and I get the 'general idea' of what they do. But I really don't understand how you go from a line of code like Console.Readline() in .NET (or Java or C++) and have it actually do stuff. Sure, I'm vaguely aware of MSIL (in the case of .NET), and that some magic happens with the JIT compiler and it turns into native code (I think). I'm told Java is similar, and C++ cuts out the middle step. I've done some mainframe assembly, it was a few years back now. I remember there were some instructions and some CPU registers, and I wrote code....and then some magic happened....and my program would work (or crash). From what I understand, an 'Emulator' would simulate what happens when you call an instruction and it would update the CPU registers; but what makes those instructions work the way they do? Does this turn into an Electronics question and not a 'Computer' question? I'm guessing there isn't any practical reason for me to understand this, but I feel like I should be able to. (Yes, this is what happens when you spend a day with a small child. It takes them about 10 minutes and five iterations of asking 'Why?' for you to realize how much you don't know)

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• Use HAProxy or Nginx to Load Balance between VPS

  - by xperator

  I want to load balance + failover backup multiple vps webservers hosted on different providers. I heard that for HAProxy you need multiple server under the same subnet, plus a shared (virtual) ip address between load balancers. But it's not possible in my case cause every VPS is on different node/network. Is there a way to use HAProxy in this kind of setup ? ( Please explain how briefly, I don't want to hear your "YES" answer ) What about NginX? Is it possible to achieve same result with Nginx ? (when servers are located on different nets) I know about Round Rubin DNS, but it doesn't provide a real failover solution, neither a load balance between servers.

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• Unity gizmos vs. referenced game objects

  - by DuckMaestro

  I'm designing a Unity script that I intend to be highly reusable and as easy as possible to setup within the editor. To this end, a number of properties of this script really need some kind of visual representation on screen. It is an unresolved question to me whether the design of the script should require references to placeholder game objects, OR just Vector3's and float's that have associated gizmos drawn for them. Normally a gizmo would be a natural choice, except that Unity gizmos are not directly manipulable (as far as I can tell). Because of this shortcoming I'm having to consider whether depending on references to placeholder game objects is a more designer-friendly approach ultimately, in spite of the extra setup required, and that it might be counter-intuitive when the placeholder game objects disappear at run-time (which my script would do). Is there a community standard or preference here in this case? Can a Unity-experienced game programmer / designer speak to which approach they feel is more intuitive or more convenient to setup, when using a 3rd party script? Or is this just splitting hairs as long as I ship an example prefab with my script?

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• How do I find broken symlinks automatically on Windows?

  - by HughG

  Not sure if this is bad style, but I'm asking this question here because I couldn't find the answer elsewhere, and then I worked out one solution on my own. I'd be interested to see other people's solutions, but after a few days I'll post my own. In my specific case, I'm running on Windows 7, but I'd be interested in answers for other/older versions of Windows. I realise that one answer is "install a version of Unix find, and then solve as for Unix", but I wanted a more "native" solution. EDIT 2012-07-17: Clarification: by "automatically" I ideally mean something I can run as part of a script, rather than a GUI tool which does all the work at the press of a button, because I'll want to do this unattended.

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