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• Application development : method to manage backgound process

  - by Simon Dubois

  I am developing an application with different behavior depending on the arguments : - "-config" starts a Gtk window to change options, start and close the daemon. - "-daemon" starts a background process that does something every X minutes. I already know how to use fork/system/exec etc... But I would like to know the main logic of such application to : - restart or refresh the daemon when configuration change. - keep only one instance of the daemon. I have red that killing the daemon to restart it is not a clean way to do. How other applications do ? (ubuntuone, weather forecast, rss feed working with notification area) Thanks for your help. PS : I don't want to create a system-wide daemon, just a user application with a background process.

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• Using EPEL repos with Oracle Linux

  - by wcoekaer

  There's a Fedora project called EPEL which hosts a set of additional packages that can be installed on top of various distributions such as Red Hat Enterprise Linux, CentOS, Scientific Linux and of course also Oracle Linux. These packages are not distributed by the distribution vendor and as such also not supported by the vendors (including Oracle) however for users that want to pick up some extras that are useful, it's very easy to do this. All you need to do is download the EPEL RPM from the website, install it on Oracle Linux 5 or Oracle Linux 6 and run yum install or yum search to get the packages. example : # wget http://download.fedoraproject.org/pub/epel/6/i386/epel-release-6-5.noarch.rpm # rpm -ivh epel-release-6-5.noarch.rpm # yum repolist Loaded plugins: refresh-packagekit, rhnplugin repo id repo name status epel Extra Packages for Enterprise Linux 6 - x86_64 7,124 The folks that build these repositories are doing a great job at adding very useful packages. They are free, but also unsupported of course.

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• horizontal line across screen at startup

  - by Debbie Poole

  I recently ran an upgrade from 12.04 to 12.10 and was using Nvidia current tested drivers and all seemed ok at first. Then suddenly every time I started the computer and shutdown, the graphical plymouth logo changed to text.The only changes I made to try to correct this issue were; sudo apt-get --purge remove nvidia-current nvidia-settings sudo apt-get --purge autoremove sudo apt-get clean sudo apt-get update sudo apt-get install nvidia-current and this made no change at all to the display. Then I read somewhere that Nouveau drivers may be the answer, so I installed them to use instead, and hey presto, the shutdown screen displays the Plymouth splash. However with startup, I get a stable purple screen, for a while, and than a thick black horizontal line appears, really ugly-looking, and then the loging screen appears to be ok. Can I correct the login screen same as the shutdown screen?

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• Cannot login to newly created user account

  - by penner

  Trying to switch accounts to my newly created account I get a black screen and then it takes me back to the main login screen after entering the correct password. Upon logging into my previously existing account I get: "System Program Problem Detected" Details: Executable path /usr/bin/Xorg Package: xserver-xorg-core 2:1.11.4-0ubuntu10.1 Details: Crash ... (tons more, but no way to copy paste or save) When I try to su su -l penner I get: No directory, logging in with HOME=/ I manually created the home directory and this error goes away but still no luck with the login. Seems something has gone wrong with the user creation? How can I correct this?

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• Skype does not save user configuration

  - by varsketiz

  On Ubuntu 10.10, I have recently started to experience this problem: For some reason Skype won't save any settings except "Sign in on startup". When Skype starts and tries to sign in it is unsuccessful (it shows incorrect password, in red) every time (I have provided the correct password). I always have to click to show contacts in groups, it does not remember it. Every time I have to go to options and update some notification settings. I know all these things should be "remembered" by Skype - this problem started only recently. I don't recall fiddling with any permissions that could have likely caused that. Do you know what the problem might be? I uninstalled (marking for complete configuration removal) and re-installed Skype, but it still remembers my username (why??). Can I find Skype configuration files on the filesystem somewhere and change permissions for them - or even better - edit the files to set what I want?

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• Google I/O 2012 - Advanced Design for Engineers

  Google I/O 2012 - Advanced Design for Engineers Alex Faaborg, Christian Robertson Design isn't black magic, it's a field that people can learn. In this talk two elite designers from Google will give you an advanced crash course in interactive and visual design. Topics will include mental models, natural mappings, metaphors, mode errors, visual hierarchies, typography and gestalt principles. Correctly applied this knowledge can drastically improve the quality of your work. For all I/O 2012 sessions, go to developers.google.com From: GoogleDevelopers Views: 158 9 ratings Time: 55:50 More in Science & Technology

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• Cannot boot Win7 after updating to ubuntu 11.10

  - by angryInsomniac

  I had a dual boot setup on my system, with ubuntu 11.04 and Win7. Yesterday I updated ubuntu to 11.10. Now , I cannot seem to be able to load Win7 , I do see an entry for it on the boot menu. I select that entry and then the screen goes black , with everything coming to a standstill. I tried to wait for it to respond but nothing happened. I went through the forums and tried "grub-update" but when I do that , nothing really happens. I am not sure of this , but I get no output from grub for upto 10 minutes ( can grub-update be made verbose ) How can I fix this and get back to booting both OS'es properly ?

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• How to get a point to the left/right of a vector

  - by MulletDevil

  I have a position vector of a point in space and a quaternion for it's rotation. What i'm trying to calculate is a point too the left and a point to the right. I have the position and rotation(quaternion) of the red dot. What I want is to get the position of the green dots. I have a float value for the distance I want these points to be. With only the position and rotation is it possible to get a unit direction vector pointing left/right which I can multiply by my float value? Edit: I also know the original direction vector.

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• How can I get wireless working on an HP-Mini 110-3150?

  - by jfmessier

  I just got an HP Mini 110-3150, and booting from an external hard disk with Ubuntu 10.10 works all fine, except that there is no wireless detected. I noticed that the Wireless indicator is red under Ubuntu, but is enabled under whatever Windows 7 I got on it. So, I understand that it may not get detected at all by Ubuntu at startup time, and there is no manual switch that I can simply slide to turn on/off. How can I get the Wireless device turned ON by default at startup time, and is there any special driver I need to install (proprietary or not) to get it working ? Merci :-) Update: When actually installing on the computer, as a new install, the NIC is not detected at first, but upon restarting, I get a notification of a closed driver available for the wireless. Once installed, updated and restarted, it works fine.

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• 7-Eleven Mobile App Powered by Oracle SOA Suite

  - by Bruce Tierney

  When you slurp that Slurpee, do you ever think about the sub 100 millisecond processing of 20 million 7-Eleven digital transactions ever day supported by Oracle SOA Suite?  Maybe next time.  Check out this impressive video of Ronald Clanton, 7-Eleven's Digital Guest Experience Program Manager, describing how 7-Eleven provides a consistent view across all the end points of over 10,000 stores and their digital entities by using Oracle SOA Suite on Oracle Exalogic.  Managed by Oracle Enterprise Manager, they were able to provision their "Rapid-Fire" Middleware as a Service (MWaaS) in only "10 minutes" and deliver on time and complete testing ahead of schedule. So what are you waiting for?  Download your Slurpee App to get your free Pillsbury Cinnamon pastry and enjoy your contribution to the 20 million messages/day.   When your done, take picture of your tongue...red or blue?  Watch the video here:

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• Samba installation failed on ubuntu 12.10

  - by Ayyaz

  I was trying to install samba to access shared printer on windows pc connected via office network, following response came out from terminal. please guide me how to install Samba or any other alternative. crm@crm-HP-G62-Notebook-PC:~$ sudo apt-get install samba [sudo] password for crm: Reading package lists... Done Building dependency tree Reading state information... Done Some packages could not be installed. This may mean that you have requested an impossible situation or if you are using the unstable distribution that some required packages have not yet been created or been moved out of Incoming. The following information may help to resolve the situation: The following packages have unmet dependencies: samba : Depends: samba-common (= 2:3.6.6-3ubuntu4) but 2:3.6.6-3ubuntu5 is to be installed Depends: libwbclient0 (= 2:3.6.6-3ubuntu4) but 2:3.6.6-3ubuntu5 is to be installed Recommends: tdb-tools but it is not going to be installed E: Unable to correct problems, you have held broken packages. crm@crm-HP-G62-Notebook-PC:~$

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• Diagramming software with API allowing high customisation of shapes and actions

  - by jenson-button-event

  I am after something like Visio or Lucid. A relatively simple charting/diagramming tool, to build tree-like structures from (my) pre-defined nodes (squares), but with a powerful API. Requirements: limit the type of objects allowed to be dropped on the diagram validate a model (e.g. node of type A must precede node of type B; must enter node Title) export a model import a model Our domain is very specific, and its a tool we'd want to offer to some of our power users. The $500 Visio licence isn't really within the business model. I'll put no constraints on framework or deployment (web or desktop) - is there anything out there?

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• Bluetooth not working and terminal has no command line, just a blank screen Ubuntu 12.04

  - by Josh

  I recently upgraded to 12.04 from 11.10 (ironically 11.10 had everything working, it was just laggy and jittery - now stuff isn't working on 12.04). I plug in my bluetooth dongle and the bluetooth symbol appears in the status bar top right, I can "Turn on bluetooth" and "Turn off bluetooth" here, but it has no effect overall on the status of bluetooth. When I go to Bluetooth settings I can't make it turn on. Also, as I have now discovered, my terminal has no command line for me to do anything with. There is absolutely nothing there... just a black, blank screen... Help?!

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• How can I modify the knetworkmanager icon in my kde taskbar?

  - by Joe

  I am using kubuntu 12.04 Precise 64 on my notebook. Almost everything works fine. I would like to modify the colors of the icon(s) used by knetworkmanager to indicate wifi online. Right now, I am using the (default?) Oxygen theme. What I want is to make the online icons some color other than gray - probably black, so the contrast is greater and they're easier for me to see (I use reading glasses.) I found an old article on how to do this, but when I added the icons it mentioned, they were ignored. Where are these icons stored? Can I just edit them with something like gimp to change the colors, etc.? TIA

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• SQL Excursions

  - by Grant Fritchey

  Not everyone likes boats. Some people like hanging out, on dry land, maybe sipping a good wine. Interested in doing that AND learning some new stuff about SQL Server? Then you might want to check out SQL Excursions. Denny Cherry (blog|twitter), MVP and terribly sharp individual, has organized this new venture to supply small group training in combination with travel to interesting, and let's face it, comfortable, places. The first trip is already set for Napa Valley. The training will be by Denny and MVP, author, and all round great guy, Thomas LaRock (blog|twitter). Seats for this unique event are going fast. I'd suggest signing up soon. Oh, and did I forget to mention that Red Gate is sponsoring dinner at a fine restaurant? Well, consider it mentioned. Seriously, nice wine, great training, beautiful scenery, networking, all in one place. What are you waiting for?

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• Implementing a JS templating engine with current PHP project

  - by SeanWM

  I'm currently working on a PHP project and quickly realizing how useful a templating engine would help me. I have a few tables whose table rows are looped out via a PHP loop. Is it possible to use just a JS templating engine (like Handlebarsjs) to also work with these tables? For example: $arr = array('red', 'green', 'blue'); echo '<table>'; foreach($arr as $value) { echo '<tr><td>' . $value . '</td></tr>'; } echo '</table>'; Now I want to add a column via an ajax call using a JS templating engine. Is this possible? Or do I have to use a templating engine for both server side and client side?

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• This Is a Completely Accurate Illustration of Me at My Last Job [Comic]

  - by The Geek

  Work is boring, what can I say? Usually I was up way too late every night, making the whole situation much worse. It got so bad that one of my co-workers took pictures for blackmail. =) Latest Features How-To Geek ETC 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 How Do You Block Annoying Text Message (SMS) Spam? Change Your MAC Address to Avoid Free Internet Restrictions Battlestar Galactica – Caprica Map of the 12 Colonies (Wallpaper Also Available) View Enlarged Versions of Thumbnail Images with Thumbnail Zoom for Firefox IntoNow Identifies Any TV Show by Sound Walk Score Calculates a Neighborhood’s Pedestrian Friendliness Factor Fantasy World at Twilight Wallpaper

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• How should I trouble-shoot a frozen startup screen?

  - by Brian Dant

  The Problem: I'm running 10.04, and it suddenly started freezing after it boots. I can move the mouse, but I can't select anything. When the problem first started, there were only two things on the screen: 1. Gnome-Do 2. "Unlock Login Keyring" dialog box What I have done thus far: Asked myself if the keyboard was plugged in :-) Yes, it is. Tried to use ALT+F2 or CTRL+ALT+F1 per the "What Should I Do When Ubuntu Freezes" question. (Neither were responsive) Tried to reboot using the REISUB method (which did reboot, but I still had the same problem upon restart) Gnome-Do was in the autostart folder, and I removed it by deleting ~/.config/autostart/gnome-do.desktop Deleted my password keyring per this blog post Tried to kill and restart X with ALT+SysReq+K (Screen went black but X didn't restart) Tried to hit the Esc button What my screen is currently showing: My screen currently shows the "Choose password for new keyring" dialog box.

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• Falied installing ATI X.Org binary driver!! (ATI Radeon HD 5400)

  - by Naveen

  The open source driver worked well with the fresh installation of Ubuntu 12.04, but it drains my laptop battery faster. So I installed the proprietary driver from jockey-gtk. It gave me this error message at the end of the installation: Here is the jockey.log After restarting the computer, I lost all the compositing animations. Compiz visual effects don't work. There is a black boarder around Docky. Please somebody help me...! Thanks!

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• Install wont boot up, stuck on loading text dots / restarts

  - by Franz Mayo Horkovic

  Friend gave me her laptop, we agreed on Ubuntu, but I have troubles even booting up live version (see the notebook). I tried 12.04 64bit on USB stick, it does nothing, when I choose booting live version, it just restarts PC. Then I tried 32bit version, it starts loading, but its stuck on loading components, printing on black screen just dots ........... I Googled it, found similar problem - somebody suggested to use older version and then upgrade it. I went through 11.04, 10.04 - 64 and 32 same result. Restart or infinite loading. I did memtest, it showed 4 errors, Windows Vista is running "fine", no "bluescreens" etc. Any ideas what am I doing wrong?

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• Why is there a delay for logging in (wubi)?

  - by Xianlin Xiong

  I use wubi to install Ubuntu under win7 in partition F which is fat32. When I choose Ubuntu at boot time, it jumps into a window. It shows two choices: ubuntu ubuntu recovery After choosing Ubuntu, it shows: error: file not found error: you need to load kernel first press any key to continue. It goes back to the choice window after I press a key. Again I choose Ubuntu, and it goes black and then it comes to the login window. After I log in it works. My question is: Is what happens before the login window normal or not (when using wubi)?

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• Just too bright

  - by Bunch

  Like a lot of folks I am using SSMS and VS pretty much all day. But staring at the text on the stark white background can be a bit much for my eyes after a while. I have seen quite a few different “themes” for these apps which change all the colors around to make it easier on your eyes. Some of them are pretty cool but all I really wanted was to dim the background a little not radically change the way everything looked. Since the stock colors for comments, breakpoints, keywords and the like are so familiar I wanted a background that did not interfere with those colors. So I picked the following custom color for the item background. It comes off as a parchment type color. Hue: 42        Red: 244 Sat: 123    Green: 245 Lum: 221    Blue: 224

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• Bluescreen after Ubuntu 12.10 installation, after recommended boot repair "no filesystem found" please help!

  - by Phil

  After I tried to install Ubuntu 12.10 into my Windows 7 a black screen came up and nothing happened for over five minutes. So I force shutdown my computer and started again on the linux CD. I partitioned the Linux partitions manually and installed Ubuntu. At the next reboot I got a bluescreen from Windows three secounds after loading. I tried to repair the problem by using boot-repair. Then I got out the url: http://paste.ubuntu.com/1430803 And after the next restart he told me that he didn't found the filesystem. Because he didn't found the filesystem it was unable to repair it with the windows CD. Then I tried to repair it with TestDisk and was able to change the Windows Partition into NTFS, but I was not able to repair the windows 7 boot partition. Now I get the message that No Bootloader is found when I restart. Please help me.

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• Install Opera on 64-bit

  - by maaartinus

  I tried to follow the instructions on the opera page, but it didn't work. I was assuming the base install should be the same for 64-bit, but it doesn't look so. After executing wget -qO - http://deb.opera.com/archive.key | sudo apt-key add - successfully sudo apt-get install opera says Reading package lists... Done Building dependency tree Reading state information... Done Package opera is not available, but is referred to by another package. This may mean that the package is missing, has been obsoleted, or is only available from another source E: Package 'opera' has no installation candidate Below on the page I see A 64 bit Linux version is available, you should get it automatically either from the repositories or from Opera I haven't tried to download it manually, since I prefer to get it from a repo. It it possible?

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• How do I update the IcedTea Plugin on 12.10?

  - by Brenton Horne

  Whenever I open up the page http://www.runescape.com/game.ws? in google chrome I get the notice, "IcedTea was blocked because it is out of date" and gives me the two options of updating it or running this time. I've gone to the link attached to the option of updating it and its a wikipedia page http://icedtea.classpath.org/wiki/Main_Page that wasn't helpful for me because I didn't know what to download and install. Whenever I click, 'Run this time' it works momentarily but it is prone to have the runescape interface in the browser disappear and be replaced with a black screen.

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