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• How to make JWM work in Ubuntu 12.04?

  - by alba

  I have installed the JWM on Ubuntu 12.04 via the Software Centre, but it doesn't work. When I choose the JWM session from LightDM, it only shows a black screen. It worked when I had another computer with Ubuntu 11.10, where I had the same problem after the JWM installation. But once, by chance, I chose to start JWM from a Fluxbox session. And after that, i was able to start JWM also from LightDM. But this solution does not work for me on Ubuntu 12.04. JWM never starts.

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• Why 11.10 says plymouth errors and "Checking battery state..."?

  - by Aleksi Kinnunen

  I've just installed new Ubuntu 11.10. The installation was successful. But when I start the Ubuntu, the splash screen does not work, and I get error (always some of these) "mountall: Plymouth command failed", "mountall: Connect to Plymouth was lost" or "Checking battery state..." I'm sorry, if the error messages are incorrect because I translated two first of them from Finnish (my system is in Finnish) to English, so they maybe couldn't be just right. I have already asked from our Finnish community, but they couldn't answer. Could anybody here?

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• Oracle University New Courses (Week 12)

  - by swalker

  Oracle University released the following new (versions of) courses recently: Database Oracle Enterprise Manager Cloud Control 12c: Install & Upgrade (2 days) Using Oracle Enterprise Manager Cloud Control 12c Introduction to Big Data (1 day seminar) Introduction to Oracle NoSQL Database (1 day seminar) Oracle Database Administration I: Certification Exam Preparation Seminar (Training On Demand) Development Tools Oracle Database SQL: Certification Exam Preparation Seminar (Training On Demand) MySQL MySQL for Beginners (4 days) Fusion Middleware Oracle Service Bus 11g: System Admin, Design & Integrate Accelerated (5 days) Oracle WebLogic Server 11g: Administration Essentials (Training On Demand) Oracle Solaris Developing and Deploying Applications on Oracle Solaris 11 (3 days) Fusion Applications Fusion Applications: Installation and Administration (4 days) E-Business Suite R12.x Oracle E-Business Suite Essentials for Implementers (Training On Demand) R12.x Implement Oracle Workflow (Training On Demand) R12.x Oracle Applications System Administrator Fundamentals (Training On Demand) PeopleSoft PeopleSoft PeopleTools I Rel 8.50 (Training On Demand) Get in contact with your local Oracle University team for more details and course dates. Stay Connected to Oracle University: LinkedIn OracleMix Twitter Facebook Google+

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• Does Ubuntu support SATA drives in AHCI mode?

  - by timelessbeing

  I have a current installation of Ubuntu 13. Will it boot if I switch my SATA controller to AHCI in BIOS? (I installed Ubuntu in IDE mode) I have to wait until I fix my GRUB (Windows ate it), so I thought I'd take a poll here first in case there are any precautions. I ask, because it was a royal PITA to do it in Windows. Will I need to reinstall Ubuntu to enable this? I don't mind doing that since it was just installed and I having nothing on it yet, and I kinda botched the install anyway.

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• Kostenlose Openbooks: Handbuch zu Ubuntu GNU/Linux 12.04 LTS

  - by britta wolf

  Ab sofort steht das umfassende Handbuch zu Ubuntu GNU/Linux 12.04 LTS als kostenloses Openbook auf der Website von Galileo Computing zur Verfügung. Mit diesem Standardwerk lernt man alles Wissenswerte über die Linux-Distribution Ubuntu »Precise Pangolin« kennen. Das Buch überzeugt durch seine Themenvielfalt und Vollständigkeit. Von der Installation, der Benutzeroberfläche »Unity«, der Paketverwaltung über Optimierung, Programmierung, Migration und Kernelkompilierung bis hin zur Virtualisierung und Serverkonfiguration finden die Leser alle wichtigen Fragen in diesem über 1.000 Seiten starken Buch beantwortet. Darüber hinaus profitieren sie von mehr als 300 eigens gekennzeichneten Tipps und Tricks sowie von zahlreichen Praxisworkshops. Sowohl Einsteiger, erfahrene Anwender als auch Profis profitieren von diesem Handbuch. Die HTML-Version kann bequem im Browser gelesen werden. Das gedruckte Buch ist im Buchhandel erhältlich. Link zum Openbook: http://openbook.galileocomputing.de/ubuntu/ 

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• How To Check If Your Account Passwords Have Been Leaked Online and Protect Yourself From Future Leaks

  - by Chris Hoffman

  Security breaches and password leaks happen constantly on today’s Internet. LinkedIn, Yahoo, Last.fm, eHarmony – the list of compromised websites is long. If you want to know whether your account information was leaked, there are some tools you can use. These leaks often lead to many compromised accounts on other websites. However, you can protect yourself by using unique passwords everywhere – if you do, password leaks won’t be a threat to you. Image Credit: Johan Larsson on Flickr 8 Deadly Commands You Should Never Run on Linux 14 Special Google Searches That Show Instant Answers How To Create a Customized Windows 7 Installation Disc With Integrated Updates

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• Split screen and other issues on Ubuntu 11.10 with ATI graphics card

  - by garus

  Ever since updating my Ubuntu 11.04 to 11.10 I experience issues with graphics. The biggest is the "split screen" effect where my desktop is shifted to the right, resulting in having Unity bar in the middle of the screen. As shown here: http://i.imgur.com/I8nmZ.jpg This changes from boot to boot, sometimes it's on the left, sometimes in the middle. What I tried: Removing fglrx drivers completely Installing post-update version of them, but installation is broken ATM in the Ubuntu, so no go. No one is even trying to fix it (bug report https://bugs.launchpad.net/ubuntu/+source/nvidia-common/+bug/873058 and a couple of duplicates out there) Also using the open source "radeon" driver results in the same (I have a better successful boot ratio with this one, proprietary rarely lets me boot) Other artifacts are: serious screen tearing weird lines flickering in random places lagginess Did anyone experience that? My specs: Ubuntu 11.10 AMD Radeon HD 6950 1GB

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• Creating a bootable USB recovery drive to be used by someone who isn't computer savvy

  - by David

  I am looking for a way to prepare an image of an Ubuntu machine which would be bootable and installable in the easiest way possible. I'm actually preparing an Ubuntu machine for someone living far, and not computer savvy. If he ever has troubles with his installation, he could just put a USB drive in, boot the machine and everything would be resetted for him. I know there are many methods of creating/loading an image of a drive, but the ones I've found so far have complicated menus with several options to choose from, etc. Ideally, perhaps only asking a Yes/No question such as "Would you like to reinstall?" would be great. Does such a tool exist? Thank you in advance!

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• How to begin? Windows 8 Development

  - by Dennis Vroegop

  Ok. I convinced you in my last post to do some Win8 development. You want a piece of that cake, or whatever your reasons may be. Good! Welcome to the club! Now let me ask you a question: what are you going to write? Ah. That’s the big one, isn’t it? What indeed? If you have been creating applications for computers before you’re in for quite a shock. The way people perceive apps on a tablet is quite different from what we know as applications. There’s a reason we call them apps instead of applications! Yes, technically they are applications but we don’t call them apps only because it sounds cool. The abbreviated form of the word applications itself is a pointer. Apps are small. Apps are focused. Apps are more lightweight. Apps do one thing but they do that one thing extremely good. In the ‘old’ days we wrote huge systems. We build ecosystems of services, screens, databases and more to create a system that provides value for the user. Think about it: what application do you use most at work? Can you in one sentence describe what it is, or what it does and yet still distinctively describe its purpose? I doubt you can. Let’s have a look at Outlouk. We all know it and we all love or hate it. But what is it? A mail program? No, there’s so much more there: calendar, contacts, RSS feeds and so on. Some call it a ‘collaboration’  application but that’s not really true as well. After all, why should a collaboration application give me my schedule for the day? I think the best way to describe Outlook is “client for Exchange”  although that isn’t accurate either. Anyway: Outlook is a great application but it’s not an ‘app’ and therefor not very suitable for WinRT. Ok. Disclaimer here: yes, you can write big applications for WinRT. Some will. But that’s not what 99.9% of the developers will do. So I am stating here that big applications are not meant for WinRT. If 0.01% of the developers think that this is nonsense then they are welcome to go ahead but for the majority here this is not what we’re talking about. So: Apps are small, lightweight and good at what they do but only at that. If you’re a Phone developer you already know that: Phone apps on any platform fit the description I have above. If you’ve ever worked in a large cooperation before you might have seen one of these before: the Mission Statement. It’s supposed to be a oneliner that sums up what the company is supposed to do. Funny enough: although this doesn’t work for large companies it does work for defining your app. A mission statement for an app describes what it does. If it doesn’t fit in the mission statement then your app is going to get to big and will fail. A statement like this should be in the following style “<your app name> is the best app to <describe single task>” Fill in the blanks, write it and go! Mmm.. not really. There are some things there we need to think about. But the statement is a very, very important one. If you cannot fit your app in that line you’re preparing to fail. Your app will become to big, its purpose will be unclear and it will be hard to use. People won’t download it and those who do will give it a bad rating therefor preventing that huge success you’ve been dreaming about. Stick to the statement! Ok, let’s give it a try: “PlanesAreCool” is the best app to do planespotting in the field. You might have seen these people along runways of airports: taking photographs of airplanes and noting down their numbers and arrival- and departure times. We are going to help them out with our great app! If you look at the statement, can you guess what it does? I bet you can. If you find out it isn’t clear enough of if it’s too broad, refine it. This is probably the most important step in the development of your app so give it enough time! So. We’ve got the statement. Print it out, stick it to the wall and look at it. What does it tell you? If you see this, what do you think the app does? Write that down. Sit down with some friends and talk about it. What do they expect from an app like this? Write that down as well. Brainstorm. Make a list of features. This is mine: Note planes Look up aircraft carriers Add pictures of that plane Look up airfields Notify friends of new spots Look up details of a type of plane Plot a graph with arrival and departure times Share new spots on social media Look up history of a particular aircraft Compare your spots with friends Write down arrival times Write down departure times Write down wind conditions Write down the runway they take Look up weather conditions for next spotting day Invite friends to join you for a day of spotting. Now, I must make it clear that I am not a planespotter nor do I know what one does. So if the above list makes no sense, I apologize. There is a lesson: write apps for stuff you know about…. First of all, let’s look at our statement and then go through the list of features. Remove everything that has nothing to do with that statement! If you end up with an empty list, try again with both steps. Note planes Look up aircraft carriers Add pictures of that plane Look up airfields Notify friends of new spots Look up details of a type of plane Plot a graph with arrival and departure times Share new spots on social media Look up history of a particular aircraft Compare your spots with friends Write down arrival times Write down departure times Write down wind conditions Write down the runway they take Look up weather conditions for next spotting day Invite friends to join you for a day of spotting. That's better. The things I removed could be pretty useful to a plane spotter and could be fun to write. But do they match the statement? I said that the app is for spotting in the field, so “look up airfields” doesn’t belong there: I know where I am so why look it up? And the same goes for inviting friends or looking up the weather conditions for tomorrow. I am at the airfield right now, looking through my binoculars at the planes. I know the weather now and I don’t care about tomorrow. If you feel the items you’ve crossed out are valuable, then why not write another app? One that says “SpotNoter” is the best app for preparing a day of spotting with my friends. That’s a different app! Remember: Win8 apps are small and very good at doing ONE thing, and one thing only! If you have made that list, it’s time to prepare the navigation of your app. The navigation is how users see your app and how they use it. We’ll do that next time!

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• Monitor displays "No VGA signal" "Check DVI cable" after installing motherboard drivers

  - by user1604220

  I bought computer with all of the needed parts, got everything sorted out, installed windows 7 but my CD-ROM doesn't fit my motherboard. So I had to download the driver manually and install it using USB disc. My motherboard: ECS elitegroup H61H2-M2, I downloaded it's drivers, installed the BIOS map or something, and then the computer forced a reboot after it was complete, after the reboot my monitor just stopped working and displayed No VGA signal, No DVI cable I think I've just installed the wrong driver, well but how can I sort it out? This is the driver I installed. On the book, it tells me to install the drivers, without the driver it won't see the Internet connection cable. I'm 100% sure there is nothing wrong with the monitor or it's cables. it stopped working exactly after the reboot after the installation.

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• Slow on browsing web, but normal when using apt-get

  - by Arif Setyawan

  I have a problem with my fresh instalation of Ubuntu 11.10. The problem happen when i start up my browser and accessing website such google, askubuntu.com, facebook and other sites. frustate on the situation i try watch the progress in system monitor. the result from monitor shows that there is no data transfer when i try to accessing the page. firstly, i assume that it is the trouble from my ISP or my home connection. But it is not. When i try pinging google it shows transaction between my computer and the network but still null from browser. Then i tried to test the aptitude and it was work fine but still the browser won't recieve any packet from the internet. Here is the detail of my tools : Laptop : Toshiba Satellite e205 (network card atheros) Operating System : Ubuntu 11.04 dual booted with Win7 Browser : Mozilla Firefox comes up with the Ubuntu 11.10 installation Chrome : Last version (just yesterday install it) Thank You before :) [this question posted via win]

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• Problem installing LibreOffice; please help!

  - by EmmyS

  I followed the instructions for installing LibreOffice found here, which are basically the same instructions found all over askubuntu and the web in general. I followed the instructions (including removing OO first) for gnome; all that is in my Applications menu now is LibreOffice (OO used to have OpenOffice Spreadsheet, OpenOffice Presentation, etc.) When I open LibreOffice, I get the splash screen/menu, but all of the choices for creating new docs are greyed out. It also will not open any office/type files (no errors; they just don't open.) The terminal commands indicated that installation was successful, but obviously something is missing. I'm guessing I can just reinstall OO from the software center, but I'd really like to give LibreOffice a try, given the lack of ongoing development on OO. Can anyone help me out?

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• watchdog/0 process using all my CPU suddenly

  - by jeffery_the_wind

  I have a fresh installation of Ubuntu 12.04, I have been running it for about a week. Suddenly today I noticed my computer freezes every 5 seconds. I restarted the computer and I still get this. I believe it is a process called watchdog/0 that is using all the resources. See the attached pictures. How can I stop this? I can barely use my computer like this. UPDATE Well I just did a cold reboot, (shutdown, unplug, and plug back in, and turn on) and it seems to have fixed it. After looking at the man page for watchdog, it seems that this process may stay on during a restart? so it is more like a soft restart? Why that happens I don't know.

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• Gnome3 pointer barrier not working with dual monitors

  - by Nathan

  I have a dual monitor setup using Gnome3. Misc Info : In the past I used Fedora, there was a pointer barrier between my two monitors in the upper left corner so that I can hit the hot corner when moving from the right monitor to the left monitor. Problem : However, with my new Ubuntu installation, the barrier no longer exists and my mouse pointer glides straight to the next screen. This makes that hot corner nearly useless. I've looked around, messed with the values in /usr/share/gnome-shell/js/ui/layout.js, but I can't figure out how to make the pointer barrier work. may someone suggest hot to get the full utilization of hot cornet.

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• How to prevent WLAN connection from dropping permanently?

  - by Chris

  I have a desktop with a Fritz USB WLAN N stick and tried Ubuntu 12.04. Installation went fine and WLAN is working. However, connection drops permanent. Reconnecting manually fixes it but after a few minutes it drops again. It's connected to a Vodafone 802 box with WLAN N fix set. It seems that it works when I switch off N mode. But I need to test. Can someone confirm this issue or is there another solution? I have another machine with 12.04 (HP 625 laptop) running where connection is stable.

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• Get Trained in Sun ZFS Storage 7000 Appliance

  - by mseika

  Oracle University has scheduled the following OPN Only course: Course: Sun ZFS Storage 7000 Appliance Installation, Administration & Hands-On Lab Dates: 23-27 Jun 2014 11-15 Aug 2014 6-10 Oct 2014 Location: Reading You will learn how to successfully describe, install, configure, maintain, administer, troubleshoot and upgrade Sun ZFS Storage 7000 software and hardware. There is a hands-on lab which will take you through a NAS head software restore session, often referred to as a FISHSTICK restore. More details and online registration Remember: your OPN discount will be applied to the standard price shown on Oracle University web pages. For assistance in booking and more information, contact the Oracle University Service Desk: eMail: [email protected] Telephone: 01 189 249 066

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• Regular wireless dropouts on new lenovo T440s in Ubuntu 14.04

  - by user290670

  Over the last 24 hours my wireless has dropped out regularly. I've tested to make sure it isn't my router (my phone and everyone in the house isn't having problems using the wifi). This is a brand-new installation of Ubuntu 14.04 and according to uname I'm running kernel 3.13.0-24-generic. Now, my laptop has an Intel 7260AC dual band wireless card and I've read that Ubuntu has been having trouble with these. I notice that at http://www.intel.com/support/wireless/wlan/sb/CS-034398.htm There are some updated drivers for my kernel version. However I have no idea how to update the kernel to use these drivers instead so that I can see if this will fix it. Can anyone help? These dropouts are really annoying. EDIT: Upgrading to 3.14.6 did not help.

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• How to setup passwordless SSH access for root user

  - by Cerin

  I need to configure a machine so software installation can be automated remotely via SSH. Following the wiki, I was able to setup SSH keys so my user can access the machine without a password, but I still need to manually enter my password when I use sudo, which obviously an automated process shouldn't have to do. Although my /etc/ssh/sshd_config has PermitRootLogin yes, I can't seem to be able to login as root, presumably because it's not a "real" account with a separate password. How do I configure SSH keys, so a process can remotely login as root on Ubuntu?

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• How can I backup my PPAs?

  - by Scaine

  Related to this question. But my concern is that over the past year, most of my more interesting (or used) applications are from PPAs, and just backing up my sources list won't add the associated launchpad keys the way that add-apt-repository does. So I'm looking for a way to list all the PPA urls (like ppa:chromium-daily/stable) so that I can easily script a series of add-apt-repository commands to add them into a new installation gracefully. Short of dumping my bash history of course. Which might be feasible, depending on how far back that file goes back?

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• Which programming language suits a system that must work without user input

  - by Ruud

  I'm building a prototype of a device that will function much alike a digital photoframe. It will display images retrieved from the internet. The device must start up and run the photoframe. It will have no user interface. The device has a minimal ubuntu installation, but I could install Xorg or whatever needed. Question: I have trouble figuring out which programming language will be suitable. I've just started using Python to try out several things and I am able to download and display images. I guess that means Python can do what I'd like, but is it suitable as a language that will be run on boot without any user interference? Related questions: - How do I set up Linux to start that script automatically? - How to setup a second Python script as a server that runs in the background to retrieve images before they are displayed (Because I think I'll need threading of some sort?)

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• No root partition

  - by christian ashton

  I'm having serious problems trying to install ubuntu 14.04 on my Toshiba Satellite C850 laptop. Whenever I try to install it it says "No root file system found. Please correct this error from the partitioning menu." I've tried to create new partitions but I don't know what size to make them etc. can someone please help me on this? (Is there a way to create partitions through the terminal? I'm new to ubuntu) but i was on it 2 days ago, laptops crashed and now I can't get past the installation. I've created a new partitioning table just need guidance on which partitions to create and how big to make them. I have absolutely no partitions whatsoever on my hard drive (or whatever the partitions are part of) so it will need to be from the very start. Thanks in advance!

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• "sudo apt -get install foo-" causes removing foo package and everything depends on it

  - by M.Elmi

  While working in command prompt, I accidentally typed following command: sudo apt-get install python3- and ubuntu started removing python3 and everything depends on it (including firefox and much more). Fortunately I closed that terminal immediately and reverted everything by checking dpkg log file, but I was wondering why an install command should act like remove? Is it a bug? Consider the situation that you are looking for a package name (pressing Tab twice) and going through possibilities by pressing Enter key and those Enter keys remain in the keyboard buffer and.... youhaaaa... apt-get is removing the entire installation in front of your eyes.

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• Ubuntu 13.10 won't boot and hangs on a black screen

  - by Anonymous John

  I installed Ubuntu 13.10 64-bit today and I sat on the internet most of the day after installation. I shut the computer down and went bowling with my family. When I came back, I turned on my computer and it came to the boot screen as usual, but then the screen went black and stayed black. Can this be solved or do I have to install Ubuntu 13.04. My dad does not know about this and I do not want to get yelled at for an hour, so I need an answer before midnight mountain time, otherwise I will install Ubuntu 13.04 so I won't get yelled at in the morning.Thanks to anyone who answers this.

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• How to remove Ubunto from boot screen?

  - by Alaa M.

  I tried to install Ubuntu 14.04 on my Windows 8, and in the installation wizard I chose "Help me boot from CD". Now I have something like this when I restart the computer: http://i.stack.imgur.com/HxDQr.png If I click Ubuntu I get an error about a missing file (wubildr.mbr). I found a solution here. But that's not my concern now. I don't know if that means I have Ubuntu installed on my computer now or not, but I wanna delete it from the boot screen. I figured that I need to delete its partition, so I went to Disk Management and found the following: http://i.stack.imgur.com/W0oP4.png My question is: which one should I delete?

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• Why does grub selection no longer appear on my dual-boot system?

  - by ksinkar

  I had installed a Ubuntu 12.04 and Fedora 17 dual boot on my system. During the installation I had installed Ubuntu first and Fedora later. Fedora had recognized Ubuntu and added it to the GRUB OS selection list. Afterwards I installed some routine updates on my Ubuntu and after that I am just not able to see the GRUB OS selection anymore when I boot. I am unable to understand what happened, both Fedora and Ubuntu use GRUB 2.0. Also it seems Ubuntu is not able to recognize other existing linux operating systems; because in the beginning I had installed Fedora first and Ubuntu later, but Ubuntu did not recognize Fedora at all, while Fedora recognized Ubuntu when I installed the other way round.

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