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• Setting up a static IP address (public) in Ubuntu

  - by ycseattle

  I have a business class internet connection and need to setup a static ip address for a machine. I did a search online and only find how to setup static local ip addresses (like 192.168..). I tried the same technique, and only setup the ip address and netmask, but after restart networking the computer could not connect to the outside world. This is what I did: 1) edit /etc/network/interfaces iface eth0 inet static address 173.10.xxx.xx netmask 255.255.255.252 2) edit /etc/resolv.conf search wp.comcast.net nameserver xx.xx.xx.xxx nameserver xx.xx.xx.xxx 3) restart network sudo /etc/init.d/networking restart Now the last step didn't report error, ifconfig shows the ip address was set, but this server cannot connect to outside world, ping google.com and reports "unknown host google.com". Any ideas?

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• new user account

  - by Donna Crain

  Hi I hope someone can help me... I accidentally renamed my own user name on my mac running OS X 10.4.11 and tried renaming back to what it was but now I have two accounts (the one I want to use which has all my preferences, applications, mail boxes, etc etc) is it possible to copy my settings from my original into this new user name? When I open my computer it defaults to this new account but everything is setting up from new and I just need to get access to all my work documents, mail settings etc. If there is anyone who could help out, I would be very grateful. Thank you in advance.

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• Text Terminal Hardware (for Linux)

  - by DLH

  Is there any way to obtain a hardware text terminal (preferably small in size) with a screen and a keypad to connect to a Linux machine (preferably via usb)? I'd like to be able to log into a command line and do some work there while simultaneously running a graphical environment on the main display. It seems like there should be some kind of lcd screen and qwerty keypad device designed for this purpose. Does this exist, and how do I get one? Edit: I'd be happy with a small networked device as well, as long as I could get a remote terminal into my computer.

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• Why does my Mac always crash when I enable `ask for password after screensaver ended`?

  - by Koning Baard XIV

  I have enabled these two things: Placing the mouse-pointer in the bottom-left corner of any display makes the screensaver appear After the screensaver or stand-by has ended, ask for password However, this combination always leads to this (Black Screen of Death) after entering the screensaver with the bottom-left corner: Here are my system specs: Hardware Overview: Model Name: iMac Model Identifier: iMac9,1 Processor Name: Intel Core 2 Duo Processor Speed: 2,66 GHz Number Of Processors: 1 Total Number Of Cores: 2 L2 Cache: 6 MB Memory: 2 GB Bus Speed: 1,07 GHz Boot ROM Version: IM91.008D.B08 SMC Version (system): 1.44f0 Serial Number (system): W89171JF0TF Hardware UUID: 323A90F0-8A2F-5057-B501-2087489E0DFF System Software Overview: System Version: Mac OS X 10.6.3 (10D573) Kernel Version: Darwin 10.3.0 Boot Volume: Macintosh HD Boot Mode: Normal Computer Name: YOU SHOULD NOT KNOW THIS User Name: YOU SHOULD NOT KNOW THIS Secure Virtual Memory: Not Enabled 64-bit Kernel and Extensions: No Time since boot: 11:46 Can anyone help me? Thanks

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• Which algorithms/data structures should I "recognize" and know by name?

  - by Earlz

  I'd like to consider myself a fairly experienced programmer. I've been programming for over 5 years now. My weak point though is terminology. I'm self-taught, so while I know how to program, I don't know some of the more formal aspects of computer science. So, what are practical algorithms/data structures that I could recognize and know by name? Note, I'm not asking for a book recommendation about implementing algorithms. I don't care about implementing them, I just want to be able to recognize when an algorithm/data structure would be a good solution to a problem. I'm asking more for a list of algorithms/data structures that I should "recognize". For instance, I know the solution to a problem like this: You manage a set of lockers labeled 0-999. People come to you to rent the locker and then come back to return the locker key. How would you build a piece of software to manage knowing which lockers are free and which are in used? The solution, would be a queue or stack. What I'm looking for are things like "in what situation should a B-Tree be used -- What search algorithm should be used here" etc. And maybe a quick introduction of how the more complex(but commonly used) data structures/algorithms work. I tried looking at Wikipedia's list of data structures and algorithms but I think that's a bit overkill. So I'm looking more for what are the essential things I should recognize?

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• Macbook cannot see specific wireless network after being connected to it for a while

  - by donut

  Okay, so there's a single wireless network that my laptop has troubles with. My Macbook Pro used to be fine with it until it changed to using channel 13 (or 11?). Since then, after being connected to it for a while it disappears from my laptop's view. Other networks are showing up fine and other computers (including several Macs) have no troubles connecting to this network. If I clear my system cache using Onyx and then restart (sometimes a couple times) my laptop can see and connect to it again. But it seems that if I disconnect and try reconnecting I have to clear my cache again. One thing to note is that if I put my computer to sleep while connected to this network it has no problems reconnecting on wake up. I've got a 15" Macbook Pro 2,2 with Leopard 10.5.8.

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• SQL 2008 Reporting Services Report Manager blank on Win 7

  - by Daniel Root

  I have installed SQL Server 2008 Reporting Services on my development laptop running windows 7. When I browse to the report manager, only the header is shown. The content pane is blank, and there is no 'Site Settings' option, New Folder options, etc. I found plenty of similar stories about SQL 2005, and then the fix was to manage permissions in the virtual directory in IIS. However, in 2008, there is no virtual directory - RS manages this outside of IIS. Per other serverfault articles, I've tried the following: adding my account to the reporting services group changing the service to run as local system made sure localhost was trusted site in IE ran IE as admin installed SQL Server 2008 SP1 There are no errors in the event viewer. Perhaps related, if I browse to the webservice, I also get the error: The permissions granted to user 'Computer\User' are insufficient for performing this operation. (rsAccessDenied)

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• Sweden: Hot Java in the Winter

  - by Tori Wieldt

  No, it's not global warming, but for some reason Sweden is a hotbed of great Java developers and great Java conferences in the winter. First, all three Swedish Java Champions are on Computer Sweden's 100 Best Swedish Developers List. You can read the full Sweden's Top 100 Developers article *if* you can read Swedish (or want to use Google Translate). Congratulations to:  Jonas Bonér, CTO Typesafe Skills: In recent years worked with solutions for scalability and availability. Previously, most between programs and compilers. Other qualifications: Located behind the framework Aspectwerkz and Akka platform for developing parallel, scalable and fault-tolerant software in Scala and Java. Rickard Oberg, Neo Technology Skills: Java, and the framework in Java EE and graph databases. Other qualifications: Founder of open source projects Xdoclet and Webwork. The latter is now called Struts second Rickard Oberg wrote the basics of the application server JBoss. Founder of Senselogic and architect of CMS and portal product SiteVision. Launched frameworkQi4j. Been a speaker at Java Zone JavaPolis, Jfokus, Øredev. Mattias Karlsson Skills: Java. Good at agile system development methods and architecture. Activity: telecom, banking, finance and insurance. Other qualifications: Runs Javaforum Stockholm. Arranges the conference Jfokus.  Frequent speaker at major international conferences such as JavaOne. Holds the title Java Champion. Also, Sweden is home to some top-notch Java Developer conferences during the Winter: jDays Gothenburg, Sweden, Dec 3-5. jDays, a dynamic Java developer conference, comes to Gothenburg. In addition to conference and presentations, visitors can join any courses in Java and related technologies for free.  Jfokus Stockholm, Sweden, Feb 4-6. Jfokus is the largest annual conference for everyone who works with Java in Sweden. The conference is arranged together with Javaforum, the Stockholm JUG.  Thanks to all the Java community who keep the Java hot in Sweden!

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• Why do I get Apps in Windows 8 listed as 'Not available' sometimes?

  - by keith

  What affects this, and if possible, how can I prevent this? Or maybe how can I get them to be available sooner or all the time? This pretty much happens to my game apps connected to Xbox live and a few others from time to time. It never happened before I updated the computer, but I haven't had the PC long anyway. Could it be that after updates that need a restart it does this as well (I've done two of those so far)? Anyhow, I'm frustrated, I keep clicking on a app and it not responding. The problem fixes itself at some point, but I have not been able to stare at my PC long enough to figure out how long it takes or what happened.

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• DDWRT or similar as repeater in a network.

  - by Quantumplation

  I have a friend with sever connection issues due to her wireless router being on the bottom floor of her house, and the computer being a story or two away. I have several old Linksys routers lying about, one of which is currently running DDWRT for my network. Would it be a good idea (effective) to configure one of these routers as a wireless bridge of some kind in an intermediary floor to improve her connection? Is there any specific configuration beyond the standard DDWRT setup that I would need to do? Thanks for your help. =)

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• The Hot-Add Memory Hogs

  - by Andrew Clarke

  One of the more difficult tasks, when virtualizing a server, is to determine the amount of memory that Hypervisor should assign to the virtual machine. This requires accurate monitoring and, because of the consequences of setting the value too low, there is a great temptation to err on the side of over-provisioning. This results in fewer guest VMs and, in fact, with more accurate memory provisioning, many virtual environments could support 30% more VMs. In order to achieve a better consolidation (aka VM density) ratio, Windows Server 2008 R2 SP1 has introduced what Microsoft calls ‘Dynamic Memory’. This means that the start-up RAM VM memory assigned to guest virtual machines can be allowed to vary according to demand, changing dynamically while the VM is running, based on the workload of applications running inside. If demand outstrips supply, then memory can be rationed according to the ‘memory weight’ assigned to the guest VM. By this mechanism, memory becomes a shared resource that can be reallocated automatically as demand patterns vary. Unlike VMWare’s Memory Overcommit technology, the sum of all the memory allocations to each virtual machine will not exceed the total memory of the host computer. This is fine for applications that are self-regulating in their demands for memory, releasing memory back into the 'pool' when not under peak load. Other applications however, such as SQL Server Standard and Enterprise, are by nature, memory hogs under high workload; they can grab hot-add memory whilst running under load and then never release it. This requires more careful setting-up and the SQLOS team have provided some guidelines from for configuring SQL Server in virtual environments. Whereas VMWare’s Memory Overcommit is well-proven in a number of different configurations, Hyper-V’s ‘Dynamic Memory’ is new. So far, the indications are that it will improve the business case for virtualizing and it is probably a far more intuitive technology for the average IT professional to grasp. It is certainly worth testing to see whether it works for you.

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• scheduled chkdsk on Windows 7 blinking the hard disk light every 5 seconds, what can I do?

  - by Jian Lin

  PG&E (the local electricity company) came and took out the old power meters and put in a new ones by brute force and with no advance notice in our neighborhood, so my computer went down in power. So I went to Windows 7's drive C and schedule a Disk Cleanup (chkdsk) on the next boot up. When it boots up, it says A disk check has been scheduled To skip disk checking, press any key within __ second(s). and then after it shows To skip disk checking, press any key within 1 second(s). it just sits there, with no further message. the hard disc light blinks every 5 seconds. So what is to be done now? I certainly don't want to brute force power off again.

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• Macbook Pro 13" Retina (10,2): Keyboard and Touchpad don't work

  - by Dirk

  I'm dealing with Ubuntu since about 5 years and installed it on several laptops. Now I'm stuck when trying to install Ubuntu 12.04.1 on a brand new Macbook Pro 13" Retina (10,2). I sucessfully can start Ubuntu from an USB stick, the Ubuntu desktop is visible, a mouse cursor is visible. But there is no respond to keyboard or touchpad input. So I cannot really install Ubuntu on the Macbook. The details of my approach: Prepare an empty USB stick Download "ISO 2 USB EFI Booter for Mac" and copy the file bootX64.efi to the USB drive as /efi/boot/bootX64.efi. Download Ubuntu 12.04.1 Desktop for Mac from http://cdimage.ubuntu.com/releases/1-amd64+mac.iso and copy the iso the USB drive as /efi/boot/boot.iso Put the USB stick into the Macbook Press and hold the "alt" button while switching the Macbook on Select "EFI Boot" from the boot menu that appears and press the Return / Enter key Immediately a black terminal screen appears with the headline "Welcome to the Ubuntu ISO << - EFI booter". 30 seconds later the familiar Ubuntu startup graphics screen is showing. Further 20 seconds later Ubuntu has started and the desktop is visible - in wonderfully fine resolution Now the computer does not respond to any actions on the touchpad nor the keyboard Who did install Ubuntu on this Macbook Pro 13" Retina (10,2) successfully? On this site https://help.ubuntu.com/community/MacBookPro this unit is not listed yet, anyway. Any help would be greatly appreciated! Dirk

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• Dual Screens with Widescreen monitors?

  - by nmuntz

  I want to build a new computer and purchase new monitor(s). At my old job I had two 20" 4:3 and I absolutely loved this setup. However, the stores in my country only seem to have widescreen monitors nowadays, and the only 4:3 LCDs i have been able to find are 17". My question is: Do widescreens suck for using them as dual monitors? Can anyone with this setup comment on their experience with having multiple widescreen monitors? Would it be better to get three 17" 4:3 LCDs instead of two widescreens? If i go with widescreens, should i go with the smallest ones i can find? Purchasing a single big widescreen monitor is not an option for me, since being able to maximize an app on a specific area of the screen is a must have for me and im not willing to use "hacky" apps for this purpose that do a crappy job. Thanks in advance for your advise.

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• How to Recover that Photo, Picture or File You Deleted Accidentally

  - by The Geek

  Have you ever accidentally deleted a photo on your camera, computer, USB drive, or anywhere else? What you might not know is that you can usually restore those pictures—even from your camera’s memory stick. Windows tries to prevent you from making a big mistake by providing the Recycle Bin, where deleted files hang around for a while—but unfortunately it doesn’t work for external USB drives, USB flash drives, memory sticks, or mapped drives. Luckily there’s another way to recover deleted files. Note: we originally wrote this article a year ago, but we’ve received this question so many times from readers, friends, and families that we’ve polished it up and are republishing it for everybody. So far, everybody has reported success! Latest Features How-To Geek ETC How to Recover that Photo, Picture or File You Deleted Accidentally How To Colorize Black and White Vintage Photographs in Photoshop How To Get SSH Command-Line Access to Windows 7 Using Cygwin The How-To Geek Video Guide to Using Windows 7 Speech Recognition How To Create Your Own Custom ASCII Art from Any Image How To Process Camera Raw Without Paying for Adobe Photoshop What is the Internet? From the Today Show January 1994 [Historical Video] Take Screenshots and Edit Them in Chrome and Iron Using Aviary Screen Capture Run Android 3.0 on a Hacked Nook Google Art Project Takes You Inside World Famous Museums Emerald Waves and Moody Skies Wallpaper Change Your MAC Address to Avoid Free Internet Restrictions

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• No audio input deviced are installed

  - by Meowbits

  If I go to Sound Recording Devices and it says "No audio devices are installed" If I click to set up a microphone I get an error "Wizard could not launch, No audio input device found, make sure your audio hardware is working properly and check your audio configuration in the Audio Devices and Sound Themes control panel. Where can I get an audio input device? I just want something so I can actually use the microphone on my headset. This is ridiculous. I have tried to look for any file but I simply cannot find a way to add an audio input device... I really do not want to format my computer just for this problem but I am starting to feel like that is the only option I have. I have the latest chipsets

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• pdflatex reads .eps files saved in OS/X, but not in Ubuntu

  - by David B Borenstein

  Sorry if this is a stupid question; I'm a newbie. I am preparing a manuscript in LaTeX. The journal (Physical Biology, an IOP publication) requires that figures be saved in .eps format, so I am trying to do that. However, I cannot get my LaTeX file to build when I have generated the .eps files on my Ubuntu computer. If I save the images on my Mac, the file build just fine. So far, I have tried saving images in ImageJ, FIJI and Inkscape. The same problem occurs in all three. When using kile, I get the following error: /usr/share/texmf-texlive/tex/latex/oberdiek/epstopdf-base.sty:0: Shell escape feature is not enabled. In TexWorks, the error is different, but still there: Package pdftex.def Error: File `./figures4/figure4a-eps-converted-to.pdf' not found. Now, if I fire up Inkscape, FIJI or ImageJ on OS/X, everything works fine. The Mac also can't build with the Ubuntu-saved images. The images generated on the Ubuntu machine open fine using Document Viewer. I am building the same LaTeX file on both computers, with the exact same results. The header of my LaTeX file is: \documentclass[12pt]{iopart} \usepackage{graphicx} \usepackage{epstopdf} \usepackage{parskip} \usepackage{color} \usepackage{iopams} And then the code for the figure is: \begin{figure} \center{\includegraphics[width=4in] {./figures4/figure4a.eps}} \footnotesize{\caption{ \label{fig:4a} (4a) lorem ipsum dolor sic amet.}} \end{figure} I'd be happy to send an example of both .eps files. Again, sorry if this is a dumb question. I tried everything I could think of before posting here. Thanks, David

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• MOSS 2007 links issue

  - by r0ca

  I have a user that for some reason lost her "My Site" & "My Links" link on her local computer. When she logs into a Citrix server she can see them. I have had her dump temp Internet files and put the site in her trusted sites but nothing is working. I think thins started after some Windows updates but not sure. Any ideas on this one? BTW, it's not turned off kin Central Admin and none of her group memberships have changed.

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• MOSS 2007 links issue

  - by r0ca

  I have a user that for some reason lost her "My Site" & "My Links" link on her local computer. When she logs into a Citrix server she can see them. I have had her dump temp Internet files and put the site in her trusted sites but nothing is working. I think thins started after some Windows updates but not sure. Any ideas on this one? BTW, it's not turned off kin Central Admin and none of her group memberships have changed.

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• Why would my router have different MAC addresses for IP and IPv6 transactions?

  - by user329161

  Today I was using tcpdump and I noticed my computer was having IPv6 traffic with a particular MAC address that I could not match with an IP using nmap or arping. After looking at the tcpdump logs a little more closely, I figured out it was another MAC address my router was using but exclusively for IPv6 traffic. 22:49:01.936830 90:0d:cb:ff:31:91 (oui Unknown) > 33:33:00:00:00:01 (oui Unknown), ethertype IPv6 (0x86dd), length 158: fe80::920d:cbff:feff:3191 > ip6-allnodes: ICMP6, router advertisement, length 104 Why would a router offer a different MAC address for IPv6?

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• Programming by dictation?

  - by Andrew M

  ie. you speak out the code, and someone else across the room types it in Anyone tried this? Obviously the person taking the dictation would need to be a coder too, so you didn't have to explain everything and go into tedious detail (not 'open bracket, new line...' but more like 'create a new class called myParser that takes three arguments, first one is...'). I thought of it because sometimes I'm too easily distracted at my computer. Surrounded by buttons, instant gratification a click away, the world at my fingertips. To get stuff done, I want to get away, write my code on paper. But that would mean losing access to necessary resources, and necessitate tedious typing-up later on. The solution? Dictate. Pros: no chance to check reddit, stackexchange, gmail, etc. code while you pace the room, lie down, play billiards, whatever train your brain to think more abstractedly (have to visualize things if you can't just see the screen) skip the tedious details (closing brackets etc.) the typist gets to shadow a more experienced programmer and learn how they work the typist can provide assistance/suggestions external pressure of typist expecting instructions, urging you to stay focussed Cons might be too hard might not work any better rather inefficient use of assisting programmer need to find/pay someone to do this

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• grub error: symbol 'grub_puts_' not found

  - by ladaghini

  I updated from Ubuntu 9.10 to 10.04, and after installation, the computer restarted. When grub loaded, all I get is a screen that says error: symbol 'grub_puts' not found and a useless grub prompt that looks like grub_rescue I've tried reinstalling grub from the livecd (usb drive) following this guide: https://help.ubuntu.com/community/RecoveringUbuntuAfterInstallingWindows to no avail. Sometimes, when I start up from the live usb, linux doesn't recognize the harddrive at all. It's not in the places menu, nor does fdisk list anything. If anyone can help fix up grub so it recognizes and boots up the two os's I have installed, I'd appreciate it. Also, I know little about grub, so try and make it easy to understand.

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• Friday Fun: Play Air Hockey in Google Chrome

  - by Asian Angel

  Do you like the challenge of fast-paced games? Then get ready to put yourself to the test with the Air Hockey extension for Google Chrome during company time. Air Hockey in Action There are two ways that you can play Air Hockey…either using the drop-down window or opening the game in a new tab. For our example we chose to play in a new tab. Before starting the game you can choose the difficulty level, to enable/disable the sound, and/or to go to full screen if desired. Note: Screenshot of “Full Screen” version shown below. While playing you really have to stay on top of things…the computer player will beat you rather quickly if you do not. Hustle hustle hustle! With a little bit of practice it does become easier but even the “Easy Level” on this game will keep you busy. If the normal size game screen seems just a bit small you can easily get a larger version using the “Full Screen Link” below the game window. Whether your browser is non-maximized as shown here or totally maximized it will fill the entire browser window area. Conclusion If you like fast paced games then the Air Hockey extension certainly fits that criteria and will keep you on your toes. Make sure and keep the sound off while playing during Friday afternoon though! Links Download the Air Hockey extension (Google Chrome Extensions) Similar Articles Productive Geek Tips Friday Fun: Play Tetris in Google ChromeFriday Fun: Play MineSweeper in Google ChromeFriday Fun: Play 3D Rally Racing in Google ChromeHow to Make Google Chrome Your Default BrowserPlay a Webpage Display Prank in Google Chrome TouchFreeze Alternative in AutoHotkey The Icy Undertow Desktop Windows Home Server – Backup to LAN The Clear & Clean Desktop Use This Bookmarklet to Easily Get Albums Use AutoHotkey to Assign a Hotkey to a Specific Window Latest Software Reviews Tinyhacker Random Tips DVDFab 6 Revo Uninstaller Pro Registry Mechanic 9 for Windows PC Tools Internet Security Suite 2010 LocPDF is a Visual PDF Search Tool Download Free iPad Wallpapers at iPad Decor Get Your Delicious Bookmarks In Firefox’s Awesome Bar Manage Photos Across Different Social Sites With Dropico Test Drive Windows 7 Online Download Wallpapers From National Geographic Site

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• RemoteApp cannot connect to webapp

  - by user58505

  I have just set up a Server 2008 R2 machine with Remote Desktop Services. It's all running on the one server, just for a single application, which works fine locally and when using Remote Desktop Web Access on the local network. However, when accessing it over the Internet, you can log on to RD Web Access fine, but when running the RemoteApp you get the message: RemoteApp Disconnected The remote computer could not be found. Please contact your helpdesk about this error. The application and all Remote Desktop services are on a single machine. I have purchased and installed a GoDaddy Cert. It works like a charm in the local network, but I get the above message when trying to access through rdweb How can I enable the RemoteApp to function outside the local network? I think there is one or 2 steps I left out??.. Please help...

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• Moving from windows to linux

  - by rincewind

  I need to reconcile these 2 facts: I don't feel comfortable working on Linux; I need to develop software for Linux. Some background: I have a 10+ years of programming experience on Windows (almost exclusively C/C++, but some .NET as well), I was a user of FreeBSD at home for about 3 years or so (then had to go back to Windows), and I've never had much luck with Linux. And now I have to develop software for Linux. I need a plan. On Windows, you can get away with just knowing a programming language, an API you're coding against, your IDE (VisualStudio) and some very basic tools for troubleshooting (Depends, ProcessExplorer, DebugView, WinDbg). Everything else comes naturally. On Linux, it's a very different story. How the hell would I know what DLL (sorry, Shared Object) would load, if I link to it from Firefox plugin? What's the Linux equivalent of inserting __asm int 3/DebugBreak() in the source and running the program, and then letting the OS call a debugger? Why the hell release builds use something, called appLoader, while debug builds work somehow different? Worst of all: how to provision Linux development environment? So, taking into account that hatred is usually associated with not knowing enough, what would you recommend? I'm ok with Emacs and GCC. I need to educate myself as a Linux admin/user, and I need to learn proper troubleshooting tools (strace is cool, btw), equivalents to the ones I mentioned above. Do I need to do Linux From Scratch? Or do I need to just read some books (I've read "UNIX programming enviornment" by Kernighan and "Advanced Programming..." by Stevens, but I need to learn something more practical)? Or do I need to have some Linux distro on my home computer?

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