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• Intermittent ethernet connectivity

  - by Amey Jah

  I am facing a weird problem. I am connecting to my dsl modem via ethernet. After booting, sometimes Ubuntu 10.10 does not detect the eth0 card properly or does not connect to the modem. I have made the following observations: My modem is fully on. All indicators are on except ethernet, which is blinking continuously. My network indicator applet informs me that I am connected to modem, but I am not able to browse as it has not established connection with modem. I need to power off and on (restart) the modem several times OR disconnect/connect (via network applet) several times, before the system can establish a connection with the modem. Once it establishes the connection, the ethernet LED (on modem) stops blinking and glows continuously. However, I do not see this problem every time I reboot or start my computer. 3/5 time, it connects to the modem in a single attempt. Friends, I am not able to understand root cause of this problem. Plus I do not know what kind of logs should be attached. If you want any logs please give me command to run, and I will paste the result for you. Note: I ran system testing when above problem happened. Follow this link to download result.

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• How can I remove the ssh last login info?

  - by Gnijuohz

  Whenever I log into a server using ssh. The prompt gives me "last login" information. I was wondering where this information comes from. How can I remove this record so when someone else log into the same server, the person would see my login info with my ip in it? So how can I do this? For the record, I am not hacking someone's computer and the server runs Ubuntu 12.04. EDIT: which file logs this kind of information? If I find the file, then I can do anything to it as root. Thanks.

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• WCF WebService: Client can't connect, as soon as request client cerficate is activated.

  - by Hinek

  I have an .NET 3.5 WCF WebService hostet in IIS 6 and using a SSL certificate. The communication between client and server works. Then I activate "request client certificate" and the client can't connect anymore Exception: System.ServiceModel.Security.SecurityNegotiationException: Could not establish secure channel for SSL/TLS with authority 'polizei-bv.stadt.hamburg.de'. Inner Exception: System.Net.WebException: The request was aborted: Could not create SSL/TLS secure channel. The certificate, the client uses is in the certificate store (local computer), the root ca is int the trusted root certification authorities store. Where can I check for an explanation on the server side? How can I check if the client really supplies it's certificate (client is not on my side)?

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• What Is The Formula for the 3 of 9 Bar Code Alphabet?

  - by Chris Moschini

  Background: 3 of 9 Barcode Alphabet A simple syntax for 3 of 9 bar codes What is the formula behind the alphabet and digits in a 3 of 9 bar code? For example, ASCII has a relatively clear arrangement. Numbers start at 33, capitals at 65, lowercase at 97. From these starting points you can infer the ASCII code for any number or letter. The start point for each range is also a multiple of 32 + 1. Bar codes seem random and lacking sequence. If we use the syntax from the second link, this is the first six characters in 3 of 9: A 100-01 B 010-01 C 110-00 D 001-01 E 101-00 F 011-00 I see no pattern here; what is it? I'm as much interested in the designer's intended pattern behind these as I am in someone devising an algorithm of their own that can give you the above code for a given character based on its sequence. I struggled with where to put this question; is it history, computer science, information science? I chose Programmers because a StackExchange search had the most barcode hits here, and because I wanted to specifically relate it to ASCII to explain what sort of formula/explanation I'm looking for.

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• Metro Apps on Windows 8 aren't working with static IP behind auth proxy

  - by Kamal

  In Windows 8 Professional, Metro Apps and Windows Update do not work with static IP settings behind authenticated proxy server. They work with DHCP on the same proxy settings (we have DHCP for wifi and static IP for LAN, both using the same proxy server). IE, Chrome and other desktop apps work nicely with both. Metro apps worked with an auth proxy (DHCP only), when I changed their proxy settings from the "edit group policy" option: Start → Settings → Edit Group Policy → Computer Configuration → Administrative Templates → Network Isolation → Internet Proxy for Apps How can I fix this?

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• How do i get a more recent version of Java on my Mac than is showing up in software update?

  - by Cd Lolly

  I need at least Java 1.6 to run a program that someone else in my lab wrote On the Java website it tells me to update Java via apple's software update function, i've run this a few times but it only got up to Java 1.5.0_24 and it now says no more updates are available for my computer Is there another way to update Java on a Mac? Is my operating system maybe to old for Java 1.6? i'm not sure what i'm running exactly, and i can't find a list of what mac operating systems run what versions of Java because the java site just suggests using Mac's software update.

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• Downloading videos from a flash website

  - by Mimi

  There are those plugins that can capture flash videos from websites like Youtube and others. There's also the browsing cache which keeps the videos and I can copy them somewhere else and have them stored on my computer. I know of these, but how can I download a video from a website that (I think) is all flash because the address doesn't change wherever you navigate to and so it stays the same when you play a video that's on the website? No plugin I've tried (realplayer, ant video downloadr, IDM) have worked with it and nothing gets cached from that website.

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• Bluetooth radio device is not available

  - by Mike

  I reinstalled my Windows 7 operating system, and have since been unable to detect my Logitech m555b bluetooth mouse. Here is some info about my system: I have have a working connection with a bluetooth printer. I have a message in the "My Bluetooth" section of explorer stating "Bluetooth radio device is not available". The Device Manager indicates that the Generic Bluetooth radio is working correctly. The bluetooth "F12" switch is on. Mouse batteries are new and the right way around. I'm presuming that I need a bluetooth driver which is non generic. The computer is a Clevo P150HMx (the version with the GTX485 GPU) with the default WLAN / bluetooth combo card manufactured by Realtek (I think it's a Realtek RTL8188CE card). I think I have the drivers installed, but I still get the generic driver in the Device Manager. I'm confused. Please help, I'm going mad on the touchpad. (Thanks for the touchup wizlog)

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• How do I create my own programming language and a compiler for it

  - by Dave

  I am thorough with programming and have come across languages including BASIC, FORTRAN, COBOL, LISP, LOGO, Java, C++, C, MATLAB, Mathematica, Python, Ruby, Perl, Javascript, Assembly and so on. I can't understand how people create programming languages and devise compilers for it. I also couldn't understand how people create OS like Windows, Mac, UNIX, DOS and so on. The other thing that is mysterious to me is how people create libraries like OpenGL, OpenCL, OpenCV, Cocoa, MFC and so on. The last thing I am unable to figure out is how scientists devise an assembly language and an assembler for a microprocessor. I would really like to learn all of these stuff and I am 15 years old. I always wanted to be a computer scientist some one like Babbage, Turing, Shannon, or Dennis Ritchie. I have already read Aho's Compiler Design and Tanenbaum's OS concepts book and they all only discuss concepts and code in a high level. They don't go into the details and nuances and how to devise a compiler or operating system. I want a concrete understanding so that I can create one myself and not just an understanding of what a thread, semaphore, process, or parsing is. I asked my brother about all this. He is a SB student in EECS at MIT and hasn't got a clue of how to actually create all these stuff in the real world. All he knows is just an understanding of Compiler Design and OS concepts like the ones that you guys have mentioned (ie like Thread, Synchronisation, Concurrency, memory management, Lexical Analysis, Intermediate code generation and so on)

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• nautilus crash when merging/overwriting files

  - by sBlatt

  On my Ubuntu 10.10, whenever I want to copy some files/folders over some other files/folders, or when I try to empty the trash, nautilus crashes! Example: I have a folder with some files. Now I want to overwrite this folder with a folder with the same name, same files, but some additional files, the merge window comes up, I choose merge and nautilus crashes (does not respond, when I press the close button I can force close it). Some times it even does the copying/emptying (trash), but it always crashes! This happens when copying to the same partition/ntfs partition/netshares, but not when I make a new folder and copy the files/folders into that (without overwriting anything). On a netshare, it's even possible to merge these files afterwards with another computer! dmesg/syslog/messages does not show any entry related to that problem. Does anyone have a solution for this very annoying problem? EDIT: dpkg -l nautilus* (see output in pastebin) EDIT2: I found out, nautilus already crashes before clicking replace/merge (as soon as the question appeares. In the video it's not entirely clear, that i click the cross before the force-close dialog appeares. Video of problem nautilus-debug-log.txt EDIT3: Filed bugreport: https://bugs.launchpad.net/ubuntu/+source/nautilus/+bug/678233

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• Transmission shutdown script for multiple torrents?

  - by Khurshid Alam

  I have written a shutdown script for transmission. Transmission calls the script after a torrent download finishes. The script runs perfectly on my machine (Ubuntu 11.04 & 12.04). #!/bin/bash sleep 300s # default display on current host DISPLAY=:0.0 # find out if monitor is on. Default timeout can be configured from screensaver/Power configuration. STATUS=`xset -display $DISPLAY -q | grep 'Monitor'` echo $STATUS if [ "$STATUS" == " Monitor is On" ] ### Then check if its still downloading a torrent. Couldn't figure out how.(May be) by monitoring network downstream activity? then notify-send "Downloads Complete" "Exiting transmisssion now" pkill transmission else notify-send "Downloads Complete" "Shutting Down Computer" dbus-send --session --type=method_call --print-reply --dest=org.gnome.SessionManager /org/gnome/SessionManager org.gnome.SessionManager.RequestShutdown fi exit 0 The problem is that when I'm downloading more than one file, when the first one finishes, transmission executes the script. I would like to do that but after all downloads are completed. I want to put a 2nd check ( right after monitor check) if it is still downloading another torrent. Is there any way to do this?

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• Are there any concrete examples of where a paralellizing compiler would provide a value-adding benefit?

  - by jamie

  Paul Graham argues that: It would be great if a startup could give us something of the old Moore's Law back, by writing software that could make a large number of CPUs look to the developer like one very fast CPU. ... The most ambitious is to try to do it automatically: to write a compiler that will parallelize our code for us. There's a name for this compiler, the sufficiently smart compiler, and it is a byword for impossibility. But is it really impossible? Can someone provide a concrete example where a paralellizing compiler would solve a pain point? Web-apps don't appear to be a problem: just run a bunch of Node processes. Real-time raytracing isn't a problem: the programmers are writing multi-threaded, SIMD assembly language quite happily (indeed, some might complain if we make it easier!). The holy grail is to be able to accelerate any program, be it MySQL, Garage Band, or Quicken. I'm looking for a middle ground: is there a real-world problem that you have experienced where a "smart-enough" compiler would have provided a real benefit, i.e that someone would pay for? A good answer is one where there is a process where the computer runs at 100% CPU on a single core for a painful period of time. That time might be 10 seconds, if the task is meant to be quick. It might be 500ms if the task is meant to be interactive. It might be 10 hours. Please describe such a problem. Really, that's all I'm looking for: candidate areas for further investigation. (Hence, raytracing is off the list because all the low-hanging fruit have been feasted upon.) I am not interested in why it cannot be done. There are a million people willing to point to the sound reasons why it cannot be done. Such answers are not useful.

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• "A copy of Firefox is already open. Only one copy of Firefox can be open at a time."

  - by Isaac Waller

  I cannot start Firefox on my Mac. It just says "A copy of Firefox is already open. Only one copy of Firefox can be open at a time." I have tried restarting the computer. Any fixes? You have suggested deleting the lock files in my profile, but, I don't have a profile. I was trying to fix the problem in question http://superuser.com/questions/3275/firefox-on-mac-slow-slow-slow by deleting my profile, so I deleted it, and this came up. So I cannot delete the lock files because they don't exist.

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• How do I use the Messaging app with an account different from my primary Microsoft account?

  - by Bob

  I set up this computer with a Local account. I have linked it to my 'primary' Microsoft account - which is used in the Mail and Store apps. There are no other accounts linked at this time. I wish to use the Messaging app with a different Microsoft account. However, Add an account only lets me add a Facebook account! I don't want to remove or change my primary Microsoft account, since I do not wish to use the Messaging account with any other services.

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• How can I refresh a document I have open in Excel in read-only mode?

  - by RoboShop

  I have an Excel document that is stored on a SharePoint Server, which I always have open on my computer in read-only mode because I need to refer to it. Every so often, in order to get the latest changes, I have to close down the file and reload it again. Are there any options within Excel 2007 which allow me to simply refresh a document I have open in read-only mode to the latest version on the server? Better still, is there a way where this could be done dynamically, without me having to hit refresh?

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• Do most "normal" people use metro or desktop in Windows 8

  - by ihateapps

  Just curious since I don't fit the definition of a "normal" computer user nor have my friends or relatives upgraded to Windows 8 yet. Are most people in the "wild" (i.e. the "guy in starbucks" or "your friend who works as an auto tech". not you since you are on SU) using metro apps regularly to the point where the desktop is pointless or are they sticking with the desktop? I've gotten mixed statistics from Google. I'm asking for your personal anecdotal opinion based on what you notice in the wild.

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• 12.04 update crash, now cannot boot

  - by EdW

  Boot now freezes the system at the "Ubuntu purple screen" with the 5 dots under it. I cannot even CTRL-ALT-F1 to get to an alternate console. Have to push reset button on computer to reboot. After the 12.04 update crash, the system would boot, but I had no icons and no launch bar and errors about missing dependencies. CTRL-ALT-F1 and ran apt-get -f install and it appeared to get the missing packages. I followed with a apt-get update; apt-get upgrade. It appeared to install all of the remaining 12.04 update packages. Rebooted to same blank screen - no icons, but got a compiz error. In console I tried "unity --reset" rebooted ... Nothing ... It's dead in the water. Tried to boot into Recovery Mode - black screen - I cannot even CTRL-ALT-Del - have to push reboot button. Fortunately, I have Mint on another partition and I can access the broken 12.04 partition. Ideas? I can back up all of my folders using Mint, but I would hate to have to do a new install.

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• would a dynamic wan disrupt a static lan?

  - by JohnMerlino

  So I found out that the cable company use the DHCP to assign the public ip address dynamically. So a subscriber's public facing ip address can change during the length of their subscription. Now what if you remove DHCP on a particular computer, which you plan to use as a web server, so that the machine has a static, unchanging IP address. If the public ip address was to change, would this confuse the Network Address Translation (NAT) and cause some sort of disruption? Please answer in layman terms, as I'm still grasping concepts here. thanks.

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• Loading main javascript on every page? Or breaking it up to relevant pages?

  - by Kyle

  I have a 700kb decompressed JS file which is loaded on every page. Before I had 12 javascript files on each page but to reduce http requests I compressed them all into 1 file. This file is ~130kb gzipped and is served over gzip. However on the local computer it is still unpacked and loaded on every page. Is this a performance issue? I've profiled the javascript with firebug profiler but did not see any issues. The problem/illusion I am facing is there are jquery libraries compressed in that file that are sometimes not used on the current page. For example jquery datatables is 200kb compressed and that is only loaded on 2 of my website pages. Another is jqplot and that is another 200kb. I now have 400kb of excess code that isn't executed on 80% of the pages. Should I leave everything in 1 file? Should I take out the jquery libraries and load only relevant JS on the current page?

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• Using Mercurial repository inside a Git one: Feasible? Sane?

  - by Portablejim

  I am thinking on creating a Mercurial repository under a Git repository. e.g. ..../git-repository/directory/hg-repo/ The 2 repositories Is it possible to manage (keeping your sanity)? How similiar is it to this? I am a computer science student at University. I manage my work in Git, mainly as a distribution mechanism (after realizing that rsync fails when you have changes in more than one place) between my desktop and usb drive. I try use of Git as a VCS as I do work. I have finished a semester where I did a small group project to prepare for a larger group project next year. We had to use Subversion, and experienced the joys of a centralised VCS (including downtime). I tried to keep the subversion repository separate to my Git repository for the subject**, however it was annoying that it was seperate (not in the place where I store assignments). I therefore moved to using an Subversion repository inside my Git repository. As I think ahead (maybe I am thinking too far ahead) I realise that I will have to try and convince people to use a DVCS and Mercurial will probably be the one that is preferred (Windows and Mac GUI support, closer to Subversion). Having done some research into the whole Git vs Mercurial debate (however not used Mercurial at all) I still prefer Git. Can I have a Mercurial repository inside a Git one without going mad (or it ruining something)? Or is it something that I should not consider at all? (Or is it a bad question that should be deleted?) ** I think outside of Australia it is called a course

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• Scheduled task based on Microsoft patch release cycle

  - by floyd

  I have a simple powershell script which unapproves all patches based on computer group name in WSUS which works great. All of our servers patch on a specific Day/Week/Time starting on Week0-Wednesday which would be the Wednesday after Microsoft Patch Tuesday (2nd Tuesday of every month) all the way to Week3-Sunday. This obviously causes problems as sometimes not all patches get applied in one reboot cycle, and then will install patches the following week during their group policy scheduled patching day/time which is what I'm trying to prevent. My question is I'm trying to schedule my script to run based on this schedule and I am finding it next to impossible using Windows Task Scheduler. For instance if I wanted something to always run on the 4th Monday after Microsoft Patch Tuesday, I cant always use the task scheduler option "4th Monday of the Month" Has anyone run into a similar situation, or know of any task scheduling tools which give you more flexibility than Windows Task Scheduler?

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• How often is your "Go-To" language the same as your favorite??

  - by K-RAN

  I know that there's already a question asking for your favorite programming language here. I'm curious though, what's your go-to language? The two can be very different. For example, I love Haskell. I learned it this past semester and I fell in love with it's very concise solutions and awesome syntax (I love theoretical math so something like fib = 1 : 1 : [ f | f <- zipWith (+) fibSeq (tail fibSeq)] makes my inner mathematician and computer scientist jump with joy!). However, the majority of my projects for classes and jobs have been in C/C++ & Java. As a result, most of the time when I'm testing something like an algorithm or Data Structure I go straight to C++. What about you guys? What languages do you love and why? What about your go-to language? What language do you use most often to get things done for work or personal projects and why? How often does a language fall into both categories??

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• DualLayout OpenSourceFood demo site installation instructions

  - by svdoever

  We released DualLayout which enables advanced web design with the power of SharePoint. DualLayout and a demo site can be downloaded from the DualLayout product page. This blogpost contains detailed instructions on installing the demo site. The demo site is based on the site http://opensourcefood.com. The demo site requires internet access because it still links to pages and resources of the real site. Execute the following steps to install the demo site: Copy the OpenSourceFoodDemo.zip file to your SharePoint Server 2010 Make sure that the zip file in “unblocked”, otherwise files are assumed from other computer (right-click on zip file, press “Unblock” button if available) Unzip the OpenSourceFoodDemo.zip to a folder of your choice (c:\OpenSourceFoodDemo) Open the SharePoint  Start->Microsoft SharePoint 2010 Products->SharePoint 2010 Management Shell Change directory to the unzip folder (cd c:\OpenSourceFoodDemo) Start install script: .\InstallDemoSite.ps1 Answer the questions, default values in most cases ok. A little guidance: Question: Give credentials for the account that will be used for the application pool Answer: use for example same account as used for the application pool of your SharePoint site (lookup in IIS Manager) Question: Give credentials for the account that will be used for the application pool Answer: Use same account you are currently logged in with The demo site is made available through a backup and restore. The SharePoint Server 2010 installation must be patched to a level equal or higher to the update level on the SharePoint Server used to create the backup. If you get errors with respect to restore check http://technet.microsoft.com/en-us/sharepoint/ff800847.aspx for downloading the latest cumulative update.

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• Fixing restore active desktop on windows xp

  - by Rachel Nark

  I've already tried this: http://answers.microsoft.com/en-us/windows/forum/windows_xp-desktop/windows-xp-will-not-restore-my-active-desktop/f664bfe4-0acd-4b11-8918-eb779bb2cc07 had no luck. All I know is that the computer crashed from a power outage. I've tried clicking the restore button and rebooting. Nothing. What else is there to try? Would like to have the desktop back. It powers on fine. I can login and use windows just fine. Just you get that annoying restore active desktop screen.

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• Unix: Sync directory with FTP or SFTP directory

  - by Svish

  I have a website on my local computer running Mac OS X. I am wondering if there is any built-in command that I can run in the Terminal that will upload that website to my webserver either through FTP or, if possible, SFTP. Installing new commands through MacPorts is also a possibility. A big bonus would be that it only uploaded the files that needs to be updated and not everything else. It would also be nice if I can tell it to delete the files on the server that no longer exists locally once in a while. Any good tips?

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