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• OracleWebLogic YouTube Channel

  - by Jeffrey West

    The WebLogic Product Management Team has been working on content for an Oracle WebLogic YouTube channel to host demos and overview of WebLogic features.  The goal is to provide short educational overviews and demos of new, useful, or 'hidden gem' WLS features that may be underutilized.    We currently have 26 videos including: Coherence Server Lifecycle Management with WebLogic Server (James Bayer) WebLogic Server JRockit Mission Control Experimental Plugin (James Bayer) WebLogic Server Virtual Edition Overview and Deployment Oracle Virtual Assembly Builder (Mark Prichard) Migrating Applications from OC4J 10g to WebLogic Server with Smart Upgrade (Mark Prichard) WebLogic Server Java EE 6 Web Profile Demo (Steve Button) WebLogic Server with Maven and Eclipse (Steve Button) Advanced JMS Features: Store and Forward, Unit of Order and Unit of Work (Jeff West) WebLogic Scripting Tool (WLST) Recording, editing and Playback (Jeff West) Special thanks to Steve, Mark and James for creating quality content to help educate our community and promote WebLogic Server!  The Product Management Team will be making ongoing updates to the content.  We really do want people to give us feedback on what they want to see with regard to WebLogic.  Whether its how you achieve a certain architectural goal with WLS or a demonstration and sample code for a feature - All requests related to WLS are welcome! You can find the channel here: http://www.YouTube.com/OracleWebLogic.  Please comment on the Channel or our WebLogic Server blog to let us know what you think.  Thanks!

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• Get The Most From MySQL Database With MySQL Performance Tuning Training

  - by Antoinette O'Sullivan

  Get the most from MySQL Server's top-level performance by improving your understanding of perforamnce tuning techniques. MySQL Performance Tuning Class In this 4 day class, you'll learn practical, safe, highly efficient ways to optimize performance for the MySQL Server. You can take this class as: Training-on-Demand: Start training within 24 hours of registering and follow the instructor-led lecture material through streaming video at your own pace. Schedule time lab-time to perform the hands-on exercises at your convenience. Live-Virtual Class: Follow the live instructor led class from your own desk - no travel required. There are already a range of events on the schedule to suit different timezones and with delivery in languages including English and German. In-Class Event: Travel to a training center to follow this class. For more information on this class, to see the schedule or register interest in additional events, go to http://oracle.com/education/mysql Troubleshooting MySQL Performance with Sveta Smirnova  During this one-day, live-virtual event, you get a unique opportunity to hear Sveta Smirnova, author of MySQL Troubleshooting, share her indepth experience of identifying and solving performance problems with a MySQL Database. And you can benefit from this opportunity without incurring any travel costs! Dimitri's Blog If MySQL Performance is a topic that interests you, then you should be following Dimitri Kravtchuk's blog. For more information on any aspect of the Authentic MySQL Curriculum, go to http://oracle.com/education/mysql.

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• Stupid Geek Tricks: Change Your IP Address From the Command Line in Linux

  - by Taylor Gibb

  Almost everybody can figure out how to change their IP address using an interface, but did you know you can set your network card’s IP address using a simple command from the command line? Changing Your IP From the Command Line in Linux Note: This will work on all Debian based Linux Distro’s. To get started type ifconfig into the terminal and hit enter, take note of the name of the interface that you want to change the settings for. To change the settings, you also use the ifconfig command, this time with a few parameters: sudo ifconfig eth0   192.168.0.1 netmask 255.255.255.0 That’s about all all you need to do to change your IP, of course the above command assumes a few things: The interface that you want to change the IP for is eth0 The IP you want to give the interface is 192.168.0.1 The Subnet Mask you want to set for the interface is 255.255.255.0 If you run ifconfig again you will see that your interface has now taken on the new settings you assigned to it. If you wondering how to change the Default Gateway, you can use the route command. sudo route add default gw 192.168.0.253 eth0 Will set your Default Gateway on the eth0 interface to 192.168.0.253. To see your new setting, you will need to display the routing table. route -n That’s all there is to it. How to Play Classic Arcade Games On Your PC How to Use an Xbox 360 Controller On Your Windows PC Download the Official How-To Geek Trivia App for Windows 8

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• Practical Approaches to increasing Virtualization Density-Part 1

  - by Girish Venkat

  Happy New year everyone!. Let me kick start the year off by talking about Virtualization density.  What is it?The number of virtual servers that a physical server can support and it's increase from the prior physical infrastructure as a percentage. Why is it important?This is important because the density should be indicative of how well the server is getting consumed?So what is wrong ?Virtualization density fails to convey the "Real usage" of a server.  Most of the hypervisor based O/S Virtualization  evangelists take pride in the fact that they are now running a Virtual Server farm of X machines compared to a Physical server farm of Y (with Y less than X obviously). The real question is - has your utilization of the server really increased or not.  In an internal study that was conducted by one of the top financial institution - the utilization of servers only went up by 15% from 30 to 45. So, this really means that just by increasing virtualization density one will not be achieving the goal of using up the servers in their server farm better.  I will write about what the possible approaches are to increase virtualization density in the next entry. 

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• Securing ClickOnce hosted with Amazon S3 Storage

  - by saifkhan

  Well, since my post on hosting ClickOnce with Amazon S3 Storage, I've received quite a few emails asking how to secure the deployment. At the time of this post I regret to say that there is no way to secure your ClickOnce deployment hosted with Amazon S3. The S3 storage is secured by ACL meaning that a username and password will have to be provided before access. The Amazon CloudFront, which sits on top of S3, allows you to apply security settings to your CloudFront distribution by Applying an encryption to the URL. Restricting by IP. The problem with the CloudFront is that the encryption of the URL is mandatory. ClickOnce does not provide a way to pass the "Amazon Public Key" to the CloudFront URL (you probably can if you start editing the XML and HTML files ClickOnce generate but that defeats the porpose of ClickOnce all together). What would be nice is if Amazon can allow users to restrict by IP addresses or IP Blocks. I'd sent them an email and received a response that this is something they are looking into...I won't hold my breadth though. Alternative I suggest you look at Rack Space Cloud hosting http://www.rackspacecloud.com they have very competitive pricing and recently started hosting Windows Virtual Servers. What you can do is rent a virtual server, setup IIS to host your ClickOnce applications. You can then use IIS security setting to restrict what IP/Blocks can access your ClickOnce payloads. Note: You don't really need Windows Server to host ClickOnce. Any web server can do. If you are familiar with Linux you can run that VM with rackspace for half the price of Windows. I hope you found this information helpful.

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• Restrict SSL access for some paths on a apache2 server

  - by valmar

  I wanted to allow access to www.mydomain.com/login through ssl only. E.g.: Whenever someone accessed http://www.mydomain.com/login, I wanted him to be redirect to https://www.mydomain.com/login so it's impossible for him/her to access that site without SSL. I accomplished this by adding the following lines to the virtual host for www.mydomain.com on port 80 in /etc/apache2/sites-available/default: RewriteEngine on RewriteCond %{SERVER_PORT} ^80$ RewriteRule ^/login(.*)$ https://%{SERVER_NAME}/login$1 [L,R] RewriteLog "/var/log/apache2/rewrite.log" Now, I want to restrict using SSL for www.mydomain.com. That means, whenever someone accessed https://www.mydomain.com, I want him to be redirected to http://www.mydomain.com (for performance reasons). I tried this by adding the following lines to the virtual host of www.mydomain.com on port 443 in /etc/apache2/sites-available/default-ssl: RewriteEngine on RewriteCond %{SERVER_PORT} ^443$ RewriteRule ^/(.*)$ http://%{SERVER_NAME}/$1 [L,R] RewriteLog "/var/log/apache2/rewrite.log" But when I now try to access www.mydomain.com/login, I get an error message that the server has caused to many redirects. That does make sense. Obviously, the two RewriteRules are playing ping-pong against each other. How could I work around this?

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• How to start a task before networking?

  - by user1252434

  I've written an upstart task that modifies /etc/network/interfaces. (Actually a file sourced into it.) Which start on condition do I need to declare to let my task run before any networking jobs? I've tried start on starting networking, but that's apparently too late. When I log in after booting I can see that the changes were written, but obviously they are not used: the new config states a static IP, but the boot process waits for a non-existing DHCP server (old config) to time out. I've also tried start on starting network-interface INTERFACE=eth0, which didn't work either. IIRC there was an error in the log that the change couldn't be written. Background: I need a VM template that can be cloned and the clones configured through a script. Among other settings, I need to give them a static IP address to access them from the host. I use guestfish to write a config file to one of the virtual disks and let a script apply these settings to the system. I don't want that disk to contain an actual system settings file. I can't modify /etc directly, because that disk is shared (copy-on-write/diff) among the clones and guestfish apparently doesn't support that type of image. I could also let them use DHCP and setup a server that assigns IP by MAC, but I'm afraid of the complexity. I could also add just another virtual disk for configuration files, but if possible I'd prefer to store settings directly on the system disk image. Used software: Ubuntu Server 12.04, VirtualBox. The configuration modifier is a self written ruby script.

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• links for 2011-03-04

  - by Bob Rhubart

  Joao Oliveira: Forms and Reports 11g Fusion Startup Script "After Fusion Middleware 11g Linux installation (Weblogic, Forms, Reports, Discoverer and Portal or others) probably most of the newcomers will wonder how to create a startup script to start the Weblogic managed Servers when the server starts up or reboots." (tags: oracle fusionmiddleware weblogic) Anthony Shorten: SOA Suite Integration: Part 3: Loading files Anthony says: "One of the most common scenarios in SOA Integration is the loading of a file into the product from an external source. In Oracle SOA Suite there is a File Adapter that can process many file types into your BPEL process." (tags: oracle otn soa soasuite) Francisco Munoz Alvarez: Playing with Oracle 11gR2, OEL 5.6 and VirtualBox 4.0.2 (1st Part) Oracle ACE Francisco Munoz Alvarez kicks off a tutorial on creating an Oracle Database 11gR2 instance using Oracle VirtualBox and OEL. (tags: oracle database virtualbox virtualization) ORACLENERD: VirtualBox and Shared Folders Oracle ACE Chet Justice shares some tips. (tags: oracle otn oracleace virtualization virtualbox) Chris Muir: Check out the ADF content at this year's ODTUG KScope11 conference Oracle ACE Director Chris Muir shares information on this year's ODTUD Kaleidoscope event in Long Beach, CA, June 26-30. (tags: oracle otn oracleace odtug adf) Edwin Biemond: Setting a virtual IP on a specific Network interface with WebLogic 10.3.4 PS3 Edwin says: "If you want High Availability in WebLogic you need to enable the WebLogic server migration, configure the nodemanager, use a virtual / floating IP in your managed servers and channels." (tags: oracle otn oracleace highavailability weblogic virtualization) Markus Eisele: High Performance JPA with GlassFish and Coherence - Part 3 Markus says: "In this third part of my four part series I'll explain strategy number two of using Coherence with EclipseLink and GlassFish. This is all about using Coherence as Second Level Cache (L2) with EclipseLink." (tags: oracle otn oracleace glassfish coherence) Michel Schildmeijer: Set Oracle ESB montoring with Enterprise Manager Grid Control "Monitoring your Oracle SOA Suite environment...can be very complicated, but if you are using Grid Control, Oracle provides you the SOA Management Pack. Unfortunately this SOA Management Pack has pretty detailed OOTB info about BPEL, but for ESB you won’t find any OOTB metrics." (tags: oracle otn soa grid servicebus)

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• configure: error: Could not find libavformat - part of ffmpeg after installing libav from source

  - by Patryk

  I tried to install minidlna on my machine but it appeared to me that it's not in repositories anymore. Well then I decided to compile it myself. After downloading version 1.1.3 I tried to compile but I needed libav headers which I couldn't install via apt - no idea why there has been a lot of broken packages: $ sudo apt-get install libavcodec-dev 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: libavcodec-dev : Depends: libavutil-dev (= 6:9.13-0ubuntu0.14.04.1) but it is not going to be installed E: Unable to correct problems, you have held broken packages. Anyways I installed libav 9.13 from source and now I came to this point: $ ./configure ... checking for av_open_input_file in -lavformat... no checking for avformat_open_input in -lavformat... no checking for av_open_input_file in -lavformat... no checking for avformat_open_input in -lavformat... no configure: error: Could not find libavformat - part of ffmpeg but I have installed that! Even in the install log I can see : ... INSTALL libavdevice/libavdevice.a INSTALL libavfilter/libavfilter.a INSTALL libavformat/libavformat.a INSTALL libavresample/libavresample.a INSTALL libavcodec/libavcodec.a INSTALL libswscale/libswscale.a INSTALL libavutil/libavutil.a INSTALL libavdevice/avdevice.h INSTALL libavdevice/version.h INSTALL libavdevice/libavdevice.pc INSTALL libavfilter/avfilter.h INSTALL libavfilter/avfiltergraph.h INSTALL libavfilter/buffersink.h INSTALL libavfilter/buffersrc.h INSTALL libavfilter/version.h INSTALL libavfilter/libavfilter.pc INSTALL libavformat/avformat.h ....

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• links for 2010-06-17

  - by Bob Rhubart

  Live Webcast: Alcatel-Lucent Delivers Modern Customer User Experience with New Interactive Portal Saeed Hosseiniyar (CIO of Alcatel-Lucent’s Enterprise Products Group) and Andy MacMillan  (VP of Product Management for Oracle’s Enterprise 2.0 Solutions) discuss how  Alcatel used Oracle’s Enterprise 2.0 solutions to build a community and  give customers a rich interactive experience. (tags: oracle otn webcast enterprise2.0) Up Next, More Browser Tools for WebCenter Sharing | The AppsLab On the heels of our bookmarklet for sharing to WebCenter, today we were designing another other way to help people interact with WebCenter from the browser (tags: ping.fm oracle e20) BPM 11gR1 now available on Amazon EC2 "This is a fully configured image which requires absolutely no installation and lets you get hands on experience with the software within minutes," says  Prasen Palvankar. "This image has all the required software installed and configured." (tags: oracle otn bpm amazon ec2) Webcast: Introducing Next-Generation Business Process Management Hasan Rizvi, Senior Vice President, Oracle Product Development, discusses innovations in Oracle's new BPM Suite 11g in this webcast. (tags: oracle otn webcast bpm) Tim Pinchetti: Architecture as a navigation system "Metaphors have value in communicating different aspects of architecture. So I’d like to explore different perspectives on architecture using different metaphors, starting with: navigation!" -- Tim Pinchetti  (tags: architecture enterprisearchitecture entarch) Oracle Fusion Middleware Innovation Awards 2010 Nominate your organization today for a chance to be recognized for your cutting-edge solution using Oracle Fusion Middleware products. (tags: oracle openworld fusionmiddleware innovation) Oracle OpenWorld Key Financials Sessions Theresa Hickman with highlights on the some of the 70 financial sessions scheduled for Oracle Open World,  crossing all the financials product lines: e-Business Suite, JD Edwards, PeopleSoft, and Fusion. (tags: oracle otn openworld financials) Liberate Your Laptops! The Return of Virtual Developer Day Details on the upcoming Oracle Technology Network Virtual Developer Day - Tuxedo. (English-language version scheduled for July 27th.)  (tags: oracle tuxedo virtualbox otn) Webcast: Effective Smart Data Grid Management David Haak (Accenture), Brad Williams (Oracle), and Chris Foretich (Southern) discuss the strategy behind and the application of smart data grid technology in this on-demand webcast.  (tags: ping.fm oracle bpm)

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• Which Ubuntu version to use on a MAXDATA laptop Eco 3100X ? with this system info

  - by Erjet Malaj

  i am speaking as new ubuntu user, i just have installed ubuntu 10.04 on my laptop, but is running very slow... So i am here to ask you a question: WHich ubuntu version can fit for my laptop MAXDATA Eco 3100x, . My Laptop System Information are: SYSTEM INFORMATION Running Ubuntu Linux, the Ubuntu 10.04 (lucid) release. GNOME: 2.30.2 (Ubuntu 2010-06-25) Kernel version: 2.6.32-40-generic (#87-Ubuntu SMP Mon Mar 5 20:26:31 UTC 2012) GCC: 4.4.3 (i486-linux-gnu) Xorg: unknown (25 February 2012 06:59:39AM) (25 February 2012 06:59:39AM) Hostname: lotus-laptop Uptime: 0 days 1 h 6 min CPU INFORMATION GenuineIntel, Intel(R) Pentium(R) 4 CPU 2.40GHz Number of CPUs: 1 CPU clock currently at 2390.561 MHz with 512 KB cache Numbering: family(15) model(2) stepping(7) Bogomips: 4781.12 Flags: fpu vme de pse tsc msr pae mce cx8 mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe up pebs bts cid MEMORY INFORMATION Total memory: 228 MB Total swap: 455 MB STORAGE INFORMATION SCSI device - scsi0 Vendor: ATA Model: IBM-DJSA-210 SCSI device - scsi1 Vendor: TOSHIBA Model: DVD-ROM SD-C2502 HARDWARE INFORMATION MOTHERBOARD Host bridge Silicon Integrated Systems [SiS] 650/M650 Host (rev 11) PCI bridge(s) Silicon Integrated Systems [SiS] Virtual PCI-to-PCI bridge (AGP) Silicon Integrated Systems [SiS] Virtual PCI-to-PCI bridge (AGP) USB controller(s) Silicon Integrated Systems [SiS] USB 1.1 Controller (rev 0f) (prog-if 10) Silicon Integrated Systems [SiS] USB 1.1 Controller (rev 0f) (prog-if 10) Silicon Integrated Systems [SiS] USB 1.1 Controller (rev 0f) (prog-if 10) Silicon Integrated Systems [SiS] USB 2.0 Controller (prog-if 20) Silicon Integrated Systems [SiS] USB 1.1 Controller (rev 0f) (prog-if 10) Silicon Integrated Systems [SiS] USB 1.1 Controller (rev 0f) (prog-if 10) Silicon Integrated Systems [SiS] USB 1.1 Controller (rev 0f) (prog-if 10) Silicon Integrated Systems [SiS] USB 2.0 Controller (prog-if 20) ISA bridge Silicon Integrated Systems [SiS] SiS962 [MuTIOL Media IO] (rev 04) IDE interface Silicon Integrated Systems [SiS] 5513 [IDE] (prog-if 80 [Master]) Subsystem: Silicon Integrated Systems [SiS] 5513 [IDE] GRAPHIC CARD VGA controller Silicon Integrated Systems [SiS] 65x/M650/740 PCI/AGP VGA Display Adapter Subsystem: Uniwill Computer Corp Device 5103 SOUND CARD Multimedia controller Silicon Integrated Systems [SiS] AC'97 Sound Controller (rev a0) Subsystem: Uniwill Computer Corp Device 5203 NETWORK Ethernet controller Silicon Integrated Systems [SiS] SiS900 PCI Fast Ethernet (rev 91) Subsystem: Uniwill Computer Corp Device 5002 Modem Silicon Integrated Systems [SiS] AC'97 Modem Controller (rev a0) Subsystem: Uniwill Computer Corp Device 4003 Thanks you asap. :-) E

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• ArchBeat Link-o-Rama for 11/22/2011

  - by Bob Rhubart

  A Brief Introduction on Migrating to an Oracle-based Cloud Environment | Tom Laszewski "Before you can start migrating to the cloud, you must define what the cloud means to you," says Tom Laszeski. "The cloud is not a specific software or hardware product; contrary to what many technology vendors would have you believe." Custom Exception Registration for ADF BC EO Attribute | Andrejus Baranovskis "Sometimes customers prefer to implement business logic validation completely in Java, without using ADF BC declarative/Groovy validation rules," says Oracle ACE Director Andrejus Baranovskis. "Thats fine, we can code business logic validation in ADF and implement different custom validation methods on VO/EO level." Oracle Exadata Virtual Conference - Jan 20 2012 The Exadata SIG, along with IOUG, is organizing the First Exadata Virtual Conference, to be held on January 20, 2012. Proposals for presentations are now being accepted. Smooth Sailing or Rough Waters: Navigating Policy Administration Modernization | Helen Pitts "It’s no surprise that fueling growth, both now and in the future, continues to be a key driver for modernization" says Helen Pitts. "Why? Inflexible, hard-coded, legacy systems require customization by IT every time a change is required." Architects putting on the Ritz; Info integration book learning; Platform for SAS Grid Computing This week on the Architect Home Page on OTN. Webcast: Introducing Oracle WebLogic Server 12c: Developer Deep Dive - Dec 1 - 11am PT / 2pm ET Learn how Oracle WebLogic Server 12c enables rapid development of modern, lightweight Java EE 6 applications. Discover how you can leverage the latest development technologies, tools and standards when deploying to Oracle WebLogic Server across both conventional and Cloud environments. Architecture all day. Oracle Technology Network Architect Day - Phoenix, AZ - Dec14. Free registration. When: December 14, 2011 Where: The Ritz-Carlton, Phoenix, 2401 East Camelback Road, Phoenix, AZ 85016 Registration is free, but seating is limited.

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• Problems with both LightDM and GDM using DisplayLink USB monitor

  - by Austin

  When I use LightDM, it will auto-login to desktop just fine. The only problem is Compiz doesn't work, and menus don't work. I can't right-click the desktop, and I can't select program menus in the top bar (I.e clicking "File" does nothing). When I use GDM, I only get a blank blue screen and the mouse cursor. I can't Ctrl+Alt+Backspace to restart, but I can Ctrl+Alt+F1 and Ctrl+Alt+F7 to switch modes. I don't think it's auto-logging me in, but I'm not sure. It plays the login screen noise. Will update with more information when I get home! EDIT: Okay, so I did a fresh install, just to ensure I hadn't borked something playing in the console. I reconfigured my setup as I did before, with the same results. Here's what I followed. The only difference is that instead of setting "vga=normal nomodeset" I set "GRUB_GFXPAYLOAD_LINUX = text". Also I only have the DisplayLink monitor configured in my xorg.conf file. At this point I'm using the open radeon driver, although I used the proprietary ati driver before. I'm not sure if I'm having a problem with: - X configuration - Graphics driver - DisplayLink driver - Unity - LightDM - Compiz - Or something else The resolution of the monitor is 800x480, 16bit. I tried setting a larger virtual resolution of 1200x720 (because the real resolution is lower than the recommended resolution), but it causes Ubuntu to boot into low graphics mode. When I get home I'm going to install the fglrx driver and see if it enables virtual resolutions, which may further enable my window manager to function properly.

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• High number of ethernet errors. Tool for testing the ethernet card?

  - by Fabio Dalla Libera

  I have an Asus Sabertooth X79. I often get corrupted files. I checked the RAM, but memtest finds no errors. To avoid the possibility of disk errors, I tried copying the files to tmpfs. If I copy from the network, I get md5sum mismatches about once every 10 times using a 6Gb file. Copying from RAM to RAM, I didn't get mismatches. I get a very high number of errors in ifconfig (compared to others PCs I just took as reference, which have 0 with much more traffic). Here is an example RX packets:13972848 errors:200 dropped:0 overruns:0 frame:101 The motherboard is new, but do you think there're some problems with it? What could I use to test the (integrated) network adapter? What else do you think I should double check? --edit-- I tried another NIC, it gives a lot of Corrupted MAC on Input. Disconnecting: Packet corrupt lost connection. I noticed that another PC downloads at 11.1MB/s without problems. This pc at 66.0 MB/s. Is there any way to try to limit the speed?

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• Backtick (Grave accent) button sticking

  - by Scott Lemmon

  I have Ubuntu 12.04 running in a Virtual Box virtual machine, on my Windows 7 32bit system. It has been working great, except that the backtick/tilde button sticks(not physically). When I hit the backtick button it keeps repeating until another input button is pressed. So if I press the spacebar while the backtick is repeating, it stops, but if I press the shift while it is repeating, the backtick turns into a tilde, and the tilde keeps repeating until I release the shift key (at which point it's a backtick again and keeps repeating). This sticking behavior only happens with the backtick key, and only in my Ubuntu virtualization, never in windows. I've tried both my laptop's keyboard and an external USB keyboard and the problem happens on both. Both keyboards I've tried are Japanese 106/109 key layout, but I'm using them with a English(US) 101 profile. When I refer to the backtick key above, I mean where it is on the US layout. If I use the Japanese profile, the key in that location (the US backtick location) still sticks, but its no longer mapped as the backtick key. Any thoughts as to what might be causing this and possible solutions? I've searched a lot, but have not found any help so far. Any help is greatly appreciated.

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• Firefox 4 crashing in VNC

  - by MacThePenguin

  On my desktop PC I've been using Kubuntu 10.04 for about a year. Recently I've updated Firefox to version 4 using aptitude and the mozilla-team/firefox-stable repository. Since then, I can't run it when I'm logged in through a VNC session. Firefox crashes immediately: when I try to run it from the console I get this error: ###!!! ABORT: X_ShmPutImage: BadShmSeg (invalid shared segment parameter); 3 requests ago: file /build/buildd/firefox-4.0.1+build1+nobinonly/build-tree/mozilla/toolkit/xre/nsX11ErrorHandler.cpp, line 203 ###!!! ABORT: X_ShmPutImage: BadShmSeg (invalid shared segment parameter); 3 requests ago: file /build/buildd/firefox-4.0.1+build1+nobinonly/build-tree/mozilla/toolkit/xre/nsX11ErrorHandler.cpp, line 203 Firefox works fine when I run it directly from the PC. Firefox 3.x worked fine also from a VNC session. I tried to turn off the hardware acceleration from the Firefox preferences, but that doesn't fix the problem. firefox --sync, firefox -safe-mode and firefox -ProfileManager also crash the same way. Any idea how to troubleshoot this? Thanks. Edit: additional info. I run vnc (RealVNC 4.1.1) from xinetd, this is the config I use: service Xvnc { type = UNLISTED disable = no socket_type = stream protocol = tcp wait = yes user = root server = /usr/bin/Xvnc4 server_args = -inetd :1 -desktop vnc5901 -query localhost -geometry 1160x675 -depth 16 -once -DisconnectClients=0 -NeverShared passwordFile=/path/to/vnc/password -render port = 5901 }

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• Partitioning During Installation, Reinstalling Ubuntu, Backup donwloaded Repositories

  - by user209645

  I am new to Ubuntu and I have just finished installing 13.10 amd64 on my PC. This will replace my Windows 7 as my only OS. I just want to clarify some issues that've been bugging me. I tried reading posts with the same topics but I just can't wrap my head to it yet. I partitioned my 80GB drive into: /root: 30GB (sorry for the confusion, I actually meant /) /home: 40GB /var : 3GB swap : 4GB (2GB of mem) Please correct me if I'm wrong about these: All of the users' documents are saved in their respective folders in /home. But say I want to clean install (format) Ubuntu, I don't need to make backups of /home and /var as they are on separate partitions. But when re-installing, do I just choose /root and format and it will recognize all the partitions (not making another /home and /var inside /root)? Downloaded packages (from all the repositories) and all their dependencies are saved in /var. So after re-installing on the same PC (assuming I'm offline), it will just use the latest updates in /var if I choose to update? And if all the installed apps and their dependents are all in there, all I need to do is re-install them without encountering errors? I have also read that you can back them up using aptoncd and then adding the DVD to the sources. So if I download all the high ranking apps using Synaptic, could I then have an all-in-one DVD installer? 30GB for / is excessive because the bulk of files will either be in /home (personal, downloads, music, videos) or /var (updates, packages, installed apps)? Please excuse me for asking such a question but I really want to explore and learn more.

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• Graphics performance of 945GME

  - by l0b0

  Edit: Since setting Appearance - Visual Effects up to a stunning "Normal", I now get ~35 FPS in glxgears right after login, with nothing else running :( I'm getting terrible graphics performance in NeverWinter Nights (native with SoU+HotU+CEP2) on my Eee PC 1005HAB. Even with all graphics settings (including the "advanced" ones) at minimum I get about 2-10 FPS, depending on the scene. Firefox is really sluggish as well - Changing tabs often takes a second, scrolling is laggy, and typing this I notice the delay between pressing keys and seeing the text on screen. The rest of the OS is running OK, although general performance seems to be even worse than my old Eee PC 900. glxgears gives about 60 FPS, which is apparently as it should be (synchronized with the monitor refresh rate). Bugs like Launchpad #252094 and the instructions for Reverting the Jaunty Xorg intel driver to 2.4 are old enough that I'm afraid following the instructions would render the system unusable. Are there any tips for improving graphics performance on this system that are still relevant for 10.10? $ uname -a Linux l0b0eee 2.6.35-28-generic #49-Ubuntu SMP Tue Mar 1 14:40:58 UTC 2011 i686 GNU/Linux $ lspci -nn | grep VGA 00:02.0 VGA compatible controller [0300]: Intel Corporation Mobile 945GME Express Integrated Graphics Controller [8086:27ae] (rev 03) $ glxinfo name of display: :0.0 display: :0 screen: 0 direct rendering: Yes server glx vendor string: SGI server glx version string: 1.4 ...

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• WebLogic Application Server: free for developers! by Bruno Borges

  - by JuergenKress

  Great news! Oracle WebLogic Server is now free for developers! What does this mean for you? That you as a developer are permitted to: "[...] deploy the programs only on your single developer desktop computer (of any type, including physical, virtual or remote virtual), to be used and accessed by only (1) named developer." But the most interesting part of the license change is this one: "You may continue to develop, test, prototype and demonstrate your application with the programs under this license after you have deployed the application for any internal data processing, commercial or production purposes" (Read the full license agreement here). If you want to take advantage of this licensing change and start developing Java EE applications with the #1 Application Server in the world, read now the previous post, How To Install WebLogic Zip on Linux! WebLogic Partner Community For regular information become a member in the WebLogic Partner Community please visit: http://www.oracle.com/partners/goto/wls-emea ( OPN account required). If you need support with your account please contact the Oracle Partner Business Center. BlogTwitterLinkedInMixForumWiki Technorati Tags: WebLogic free,WebLogic for developers,WebLogic license,WebLogic Community,Oracle,OPN,Jürgen Kress

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• Spinup time failure

  - by bioShark

  I am not sure this is a real question or a bug I should report Ubuntu. Using: Ubuntu 11.10, on a Intel Q6600, Samsung Spinpoint F4 2TB. I have set my PC on Suspend and after I came back, pressed Enter and after logging in everything was back to normal. However, I had a message from Disk Utility that one disk reports errors. I entered Disk Utility, and my Samsung 2TB disk, the one on which my Ubuntu is installed, had the SMART Status turned red, with error message on it. The error was: Spinup time failed Value 21, Threshold value was 25 (so the error was reported because 21 < 25) I restarted and booted up in Windows to see what HD Tune is reporting. Unfortunately it was exactly the same 21/25. After reading up on Wiki about SMART and the errors, I discovered that Spinup time is the time required for the disk to reach full spinning speed in milliseconds. Then it hit me that, in Ubuntu I had Suspended the system, making essentially all my hardware stop. And when I rebooted to Windows, the hardware doesn't really stop, so SMART's reading of the Spinup time was still from Ubuntu's suspension. So I did a full PC stop and then booted up again, both in Ubuntu and Windows to see if there are different readings. Both reported successful Spinup time, 68 (a little better then 21 :) ), although in Disk Utility I have a nice message: Failed in the Past So now I am pretty sure that Ubuntu didn't handle the Suspend correctly, but then again should I worry about Imminent hardware failure ? Am I missing some drivers? Should I report this as a bug to Ubuntu? Sorry if this was a bad place to ask this question.

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• basic beginning emacs questions - install latest version and pick appropriate UI

  - by MountainX

  I'm running the latest Kubuntu (12.04 beta 2) and I would like to run the latest emacs (currently v24). The repos are one version behind. What's the best way to install v24 or later (and avoid future version conflicts)? Also, is there any reason not to aways use the GUI version of emacs if X is running? For example, could I set the GUI emacs version as the default text editor and use it to edit cron jobs (crontab -e)? I'm assuming the answer is yes, but since I haven't done that yet (my default editor is nano), I want to check if there are reasons I should leave nano as the default editor. Usually when I'm working on the command line I end up using nano. Now that I think about it, I have no idea why I keep doing that. Is there any downside to calling a GUI editor when working in an X terminal? EDIT: I briefly tested these two versions GNU Emacs 24.0.94.1 (x86_64-pc-linux-gnu, GTK+ Version 3.3.20) from GNU Emacs 23.3.1 (x86_64-pc-linux-gnu) installed by default in Kubuntu. This post explains some of the differences between versions. Unfortunately (for me) the defaults installed version (23.3.1, 23.3+1-1ubuntu9) is the nox version. Package: emacs23-nox Status: install ok installed Version: 23.3+1-1ubuntu9 Replaces: emacs23, emacs23-gtk, emacs23-lucid The package with version 24 opens in GUI mode by default. That's what I prefer. Some of the version 24 changes that interest me are listed in the references below. But there appear to be a multitude of different packages and versions I could install. References: What’s New In Emacs 24 (part 1) | Mastering Emacs http://www.masteringemacs.org/articles/2011/12/06/what-is-new-in-emacs-24-part-1/ " shell-mode uses pcomplete rules, with the standard completion UI. Yowzah! There’s a lot of cool, new functionality hidden away in this gem of a change." EmacsWiki: Recent Changes http://www.emacswiki.org/emacs/?action=rc;showedit=0

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• Black screen appears when booting new install of 11.10 on my desktop, cannot access Grub menu to fix

  - by Cee

  I installed 11.10 on my desktop PC but get a black screen after the BIOS screen when I try to boot it. I was able to run 10.04.04 on my hard drive before installing 11.10 and I am also able to use 11.10 on my usb pendrive and CD ROM. I've tried unplugging all USB devices before booting and also upgrading from 11.10 to 11.10. Holding the shift key from the BIOS screen doesn't allow me to access the GRUB menu to try: Highlight the first entry, press “e” to edit it. Navigate to words “quiet splash”, delete them and type “nomodeset” in their place (without quotes). Press Ctrl + X to continue boot. Once on the desktop, go to System Administration Additional Drivers and activate the recommended drivers. So running 11.10 on my pendrive, I tried editing /etc/default/grub, commenting out the GRUB_HIDDEN_TIMEOUT setting by putting a '#' in front of it to display the grub menu and setting GRUB_TIMEOUT setting to a value greater than or equal to 1 e.g. GRUB_TIMEOUT=10. However, when I run sudo update-grub, I get: /usr/sbin/grub-probe: error: cannot find a device for / (is /dev mounted?) I get the same error with update-grub after: sudo mount /dev/sda1 /mnt and after: sudo grub-install --root-directory=/mnt /dev/sda reboot sudo update-grub Other suggestions to fix the update-grub problem: Open synaptic, then purge all the related grub installed packages and reinstall grub-pc then and finally: sudo update-grub Or use Grub Customizer http://ubuntuforums.org/showthread.php?t=1195275 What would be the best way to approach this? I'm concerned about purging "all the related grub installed packages" but if it's true some files are corrupted this would seem necessary. Also, was I executing the correct commands i.e. with mount and grub-install, before running grub-update?

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• Keyboard layout - certain keys work with AltGr, other doesn't

  - by user23122

  I run Ubuntu 12.04 in VirtualBox 4.3.14 on Windows 7 with a Swedish keyboard layout. In Windows everything works fine but in Ubuntu some keys/characters (the most important for a programmer) doesn't work. This is the result from pressing the keys in the top row 1234567890+´ (Unmodified top row on keyboard) @£$€ {[]}\ (Windows with AltGr) ¡ £$€¥ ± (Ubuntu with "AltGr") More characters are broken (pipe | is a notable example) but the top row is the biggest problem. I can workaround this by enabling "direct connection" from my USB keyboard to VirtualBox but then I have to manually disable that every time I switch out of VirtualBox. I have tried different keyboard layout, sometimes @ et al works but then other characters are broken. I also tried sudo dpkg-reconfigure keyboard-configuration with default values, but it didn't change anything. I have guest additions installed (from the built in virtual CD). I got my VB disk image from a colleague who does not have this problem, however, he does not have guest additions installed (and hence can't use a higher resolution than 1024x768, and I need to run Ecplipse...). He also have different installation of Virtual Box and Windows. For example, the key for 2 should, in Ubuntu, produce four different characters, 2"²@. The first three works fine, including superscript 2 that requires AltGr-Shift-2, it is just plain AltGr-2 to get @ that does not work on this key (and all the other keys I have problem with). Any ideas for a fix?

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• firefox raided?

  - by dschinn1001

  ubuntu 12.10 with firefox 17.0 firefox is now suddenly not starting any more ? (since I tried something with virtualbox and win7 firefox seems to be raided somehow ? - then after next boot virtualbox with win7 did not work any more and had message like here: Premature end of data in tag VirtualBox line 8. Location: '/home/$user/VirtualBox VMs/V12/V12.vbox', line 86 (8), column 2. /home/vbox/vbox-4.2.4/src/VBox/Main/src-server/MachineImpl.cpp[724] (nsresult Machine::registeredInit()). Fehlercode: NS_ERROR_FAILURE (0x80004005) Komponente: Machine Interface: IMachine {22781af3-1c96-4126-9edf-67a020e0e858} ) this happened all - after win7 made an update and virtual hard-disk with size of normally 25 Gibi exceeded to 26.8 Gibi I plugged (when I created virtualbox with win7) usb-hard-disk with 500 Gibi, but somehow win7 was not installed on disk with 500 Gibi - instead only virtual-harddisk with default 25 Gibi was created - and smaller harddisk with maximum of 120 Gibi was restless stuffed out. This created then the problem with "raided" firefox and firefox cannot start any more. After I delelted virtualbox with win7 - there are 12 Gibi free space back on the smaller harddisk - but firefox remains after reboot out-of-function and does not start.

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• Camera field of view: 3D projections & trigonometry

  - by Thomas O

  Okay, here goes. I have a camera at (Xc, Yc, Zc.) The Xc and Yc coordinates are latitude/longitude, and the Zc coordinate is an altitude in metres. I have a point at (Xp, Yp, Zp) and a field of view on the camera (Th1, Th2) - where Th1 is horizontal FOV and Th2 is vertical FOV. Given this information, I'd like to: test if the point is visible (i.e. in the camera's FOV) project the point as the camera would see it I've figured out already that the camera's horizontal view at any given distance is tan(Th1) * distance, but I don't know how to test if the point is visible. Accuracy is not critical. I would prefer a simple solution over a complicated solution, if it works well enough. The computations will be performed by a small microcontroller, which isn't very fast at things like trig functions. P.S. this is not homework, I'm doing this for some game development. It will be integrated with the real world, hence the latitude/longitude/altitude. It involves flying real RC planes through virtual hoops (or chasing virtual targets), so I have to project the positions of these hoops on a display.

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