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• lucid 10.04 LTS => Precise 12.04.1 : upgrade doesn't work

  - by Rastom

  I googled and looked into all unkown issues on ubuntu forums but I can't figure out why a 10.04 LTS server won't detect the last LTS 12.04.1. I guess since 12.04 is a fresh dist, not much is reported for related issues Here is what I did : apt-get update apt-get upgrade apt-get install update-manager-core it was already installed so no update for this package. I checked : /etc/update-manager/release-upgrades [DEFAULT] # Default prompting behavior, valid options: # # never - Never check for a new release. # normal - Check to see if a new release is available. If more than one new # release is found, the release upgrader will attempt to upgrade to # the release that immediately succeeds the currently-running # release. # lts - Check to see if a new LTS release is available. The upgrader # will attempt to upgrade to the first LTS release available after # the currently-running one. Note that this option should not be # used if the currently-running release is not itself an LTS # release, since in that case the upgrader won't be able to # determine if a newer release is available. Prompt=lts I also checked my sourcelist before running apt-get : /etc/apt/sources.list deb http://archive.ubuntu.com/ubuntu/ lucid main restricted universe multiverse deb http://archive.ubuntu.com/ubuntu/ lucid-security main restricted universe multiverse deb http://archive.ubuntu.com/ubuntu/ lucid-updates main restricted universe multiverse deb http://security.ubuntu.com/ubuntu lucid-security main restricted deb-src http://security.ubuntu.com/ubuntu lucid-security main restricted deb http://security.ubuntu.com/ubuntu lucid-security universe deb-src http://security.ubuntu.com/ubuntu lucid-security universe deb http://security.ubuntu.com/ubuntu lucid-security multiverse deb-src http://security.ubuntu.com/ubuntu lucid-security multiverse # deb http://landscape.canonical.com/packages/hardy ./ # deb-src http://landscape.canonical.com/packages/hardy ./ and then following Ubuntu guide for Precise upgrade the command below should work : root@xxxxxxxxx:/etc/apt# do-release-upgrade -d Checking for a new ubuntu release No new release found So am I missing something ? The server was accessing outside through a proxy but I grant direct access to this server to avoid any Internet access problem or redirection but no clue... Any help would be appreciated

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• Input handling between game loops

  - by user48023

  This may be obvious and trivial for you but as I am a newbie in programming I come with a specific question. I have three loops in my game engine which are input-loop, update-loop and render-loop. Update-loop is set to 10 ticks per second with a fixed timestep, render-loop is capped at around 60 fps and the input-loop runs as fast as possible. I am using one of the Javascript frameworks which provide such things but it doesn't really matter. Let's say I am rendering a tile map and the view of which elements are rendered depends on camera-like movement variables which are modified during key pressing. This is only about camera/viewport and rendering, no game physics involved here. And now, how can I handle input events among these loops to keep consistent engine reaction? Am I supposed to read the current variable modified with input and do some needed calculations in a update-loop and share the result so it could be interpolated in a render-loop? Or read the input effect directly inside the render-loop and put needed calculations inside? I thought interpreting user input inside an update-loop with a low tick rate would be inaccurate and kind of unresponsive while rendering with interpolation in the final view. How it is done properly in games overall?

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• Node.js server crashes , Database operations halfway?

  - by Ranadeep

  I have a node.js app with mongodb backend going to production in a week and i have few doubts on how to handle app crashes and restart . Say i have a simple route /followUser in which i have 2 database operations /followUser ----->Update User1 Document.followers = User2 ----->Update User2 Document.followers = User1 ----->Some other mongodb(via mongoose)operation What happens if there is a server crash(due to power failure or maybe the remote mongodb server is down ) like this scenario : ----->Update User1 Document.followers = User2 SERVER CRASHED , FOREVER RESTARTS NODE What happens to these operations below ? The system is now in inconsistent state and i may have error everytime i ask for User2 followers ----->Update User2 Document.followers = User1 ----->Some other mongodb(via mongoose)operation Also please recommend good logging and restart/monitor modules for apps running in linux

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• Arbitrary Rotation about a Sphere

  - by Der

  I'm coding a mechanic which allows a user to move around the surface of a sphere. The position on the sphere is currently stored as theta and phi, where theta is the angle between the z-axis and the xz projection of the current position (i.e. rotation about the y axis), and phi is the angle from the y-axis to the position. I explained that poorly, but it is essentially theta = yaw, phi = pitch Vector3 position = new Vector3(0,0,1); position.X = (float)Math.Sin(phi) * (float)Math.Sin(theta); position.Y = (float)Math.Sin(phi) * (float)Math.Cos(theta); position.Z = (float)Math.Cos(phi); position *= r; I believe this is accurate, however I could be wrong. I need to be able to move in an arbitrary pseudo two dimensional direction around the surface of a sphere at the origin of world space with radius r. For example, holding W should move around the sphere in an upwards direction relative to the orientation of the player. I believe I should be using a Quaternion to represent the position/orientation on the sphere, but I can't think of the correct way of doing it. Spherical geometry is not my strong suit. Essentially, I need to fill the following block: public void Move(Direction dir) { switch (dir) { case Direction.Left: // update quaternion to rotate left break; case Direction.Right: // update quaternion to rotate right break; case Direction.Up: // update quaternion to rotate upward break; case Direction.Down: // update quaternion to rotate downward break; } }

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• Sharing software updates between macs without OS X Server

  - by Frost

  Is there any way to (manually or automatically) share downloaded software updates between macs? Edit: The thinking is that I have one mac update itself using Software Update, and then somehow share the downloaded updates with other macs. For example, I have a mac pro and a mac mini on my local network. I'd like to download the Mac OS X 10.6.5 update only once, instead of having to download it separately for each mac.

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• MySQL Privileges required to GRANT EVENT, EXECUTE, LOCK TABLES, and TRIGGER

  - by Brad

  I have an account, user_a, and I would like to grant all available permissions on some_db to user_b. I have tried the following query: GRANT ALTER, ALTER ROUTINE, CREATE, CREATE ROUTINE, CREATE TEMPORARY TABLES, CREATE VIEW, DELETE, DROP, EVENT, EXECUTE, INDEX, INSERT, LOCK TABLES, REFERENCES, SELECT, SHOW VIEW, TRIGGER, UPDATE ON `some_db`.* TO 'user_b'@'%' WITH GRANT OPTION The result: Access denied for user 'user_a'@'%' to database 'some_db' Some experimentation has shown me that the only permissions my account (user_a) is unable to grant are EVENT, EXECUTE, LOCK TABLES, and TRIGGER. What privileges are required for my account to GRANT these privileges to another user? If I run SHOW GRANTS, I get this output: "GRANT SELECT, INSERT, UPDATE, DELETE, CREATE, DROP, REFERENCES, INDEX, ALTER, SHOW DATABASES, SUPER, CREATE TEMPORARY TABLES, REPLICATION SLAVE, REPLICATION CLIENT, CREATE VIEW, SHOW VIEW, CREATE ROUTINE, ALTER ROUTINE, CREATE USER ON *.* TO 'user_a'@'%' IDENTIFIED BY PASSWORD '1234567890abcdef' WITH GRANT OPTION" "GRANT SELECT, INSERT, UPDATE, DELETE, EXECUTE ON `some_other_unrelated_db`.* TO 'user_a'@'%'" "GRANT SELECT, INSERT, UPDATE, DELETE, CREATE, DROP, REFERENCES, INDEX, ALTER, CREATE TEMPORARY TABLES, LOCK TABLES, EXECUTE, CREATE ROUTINE, ALTER ROUTINE ON `another_unrelated_db`.* TO 'user_a'@'%' WITH GRANT OPTION"

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• Slick2D - Entities and rendering

  - by Zarkopafilis

  I have been trying to create my very first game for quite a while, followed some tutorials and stuff, but I am stuck at creating my entity system. I have made a class that extends the Entity class and here it is: public class Lazer extends Entity{//Just say that it is some sort of bullet private Play p;//Play class(State) private float x; private float y; private int direction; public Lazer(Play p, float x , float y, int direction){ this.p = p; this.x = x; this.y = y; this.direction = direction; p.ent.add(this); } public int getDirection(){ return direction; //this one specifies what value will be increased (x/y) at update } public float getX(){ return x; } public float getY(){ return y; } public void setY(float y){ this.y = y; } public void setX(float x){ this.x = x; } } The class seems pretty good , after speding some hours googling what would be the right thing. Now, on my Play class. I cant figure out how to draw them. (I have added them to an arraylist) On the update method , I update the lazers based on their direction: public void moveLazers(int delta){ for(int i=0;i<ent.size();i++){ Lazer l = ent.get(i); if(l.getDirection() == 1){ l.setX(l.getX() + delta * .1f); }else if(l.getDirection() == 2){ l.setX(l.getX() - delta * .1f); }else if(l.getDirection() == 3){ l.setY(l.getY() + delta * .1f); }else if(l.getDirection() == 4){ l.setY(l.getY() - delta * .1f); } } } Now , I am stuck at the render method. Anyway , is this the correct way of doing this or do I need to change stuff? Also I need to know if collision detection needs to be in the update method. Thanks in advance ~ Teo Ntakouris

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• apt-get upgrade gives "403 forbidden" error

  - by 3l4ng

  I'm running Ubuntu 13.04 64b. sudo apt-get update works fine, but when I run sudo apt-get upgrade I get these errors: Err http://archive.ubuntu.com/ubuntu/ raring-updates/main python3.3-minimal amd64 3.3.1-1ubuntu5.2 403 Forbidden Err http://ppa.launchpad.net/otto-kesselgulasch/gimp/ubuntu/ raring/main gimp amd64 2.8.6-0raring1~ppa 403 Forbidden Err http://archive.ubuntu.com/ubuntu/ raring-security/main python3.3-minimal amd64 3.3.1-1ubuntu5.2 403 Forbidden Err http://ppa.launchpad.net/otto-kesselgulasch/gimp/ubuntu/ raring/main gimp-help-en all 1:2.8-0raring16~ppa 403 Forbidden Failed to fetch http://archive.ubuntu.com/ubuntu/pool/main/p/python3.3/python3.3-minimal_3.3.1-1ubuntu5.2_amd64.deb 403 Forbidden Failed to fetch http://ppa.launchpad.net/otto-kesselgulasch/gimp/ubuntu/pool/main/g/gimp/gimp_2.8.6-0raring1~ppa_amd64.deb 403 Forbidden Failed to fetch http://ppa.launchpad.net/otto-kesselgulasch/gimp/ubuntu/pool/main/g/gimp-help/gimp-help-en_2.8-0raring16~ppa_all.deb 403 Forbidden E: Unable to fetch some archives, maybe run apt-get update or try with --fix-missing? Running sudo apt-get upgrade --fix-missing installs some updates, but the above errors still persist when I run apt-get upgrade again. The software update app shows the error: https://www.dropbox.com/s/2cr450557hmahzz/software_update.jpg and selecting continue shows: https://www.dropbox.com/s/l7u32sxyfbxxeeg/soft_upd2.jpg (sorry for the links, I don't have enough rep to post images) I am behind a proxy, but apt-get update and web browsing work without issues. I also do not believe a server being down is causing this, as the problem has been there over a month. Any ideas on how to fix this?

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• libc-bin errors when trying to install php

  - by jonney

  i am trying to update and install php into my ubuntu server 12.04 using the command below: apt-get upgrade php apt-get install php5-curl php5-gd php5-mysql php5-pgsql However i receive this error all the time: gzip: stdout: No space left on device E: mkinitramfs failure cpio 141 gzip 1 update-initramfs: failed for /boot/initrd.img-3.2.0-34-generic with 1. run-parts: /etc/kernel/postinst.d/initramfs-tools exited with return code 1 Failed to process /etc/kernel/postinst.d at /var/lib/dpkg/info/linux-image-3.2.0-34-generic.postinst line 1010. dpkg: error processing linux-image-3.2.0-34-generic (--configure): subprocess installed post-installation script returned error exit status 2 dpkg: dependency problems prevent configuration of linux-image-server: linux-image-server depends on linux-image-3.2.0-33-generic; however: Package linux-image-3.2.0-33-generic is not configured yet. dpkg: error processing linux-image-server (--configure): dependency problems - leaving unconfigured dpkg: dependency problems prevent configuration of linux-server: linux-server depends on linux-image-server (= 3.2.0.33.36); however: Package linux-image-server is not configured yet. dpkg: error processing linux-server (--configure): dependency problems - leaving unconfigured Setting up libpq5 (9.1.10-0ubuntu12.04) ... No apport report written because the error message indicates it's a follow-up error from a previous failure. No apport report written because MaxReports has already been reached Setting up php5-curl (5.3.10-1ubuntu3.8) ... Setting up php5-pgsql (5.3.10-1ubuntu3.8) ... Processing triggers for initramfs-tools ... update-initramfs: Generating /boot/initrd.img-3.2.0-32-generic gzip: stdout: No space left on device E: mkinitramfs failure cpio 141 gzip 1 update-initramfs: failed for /boot/initrd.img-3.2.0-32-generic with 1. dpkg: error processing initramfs-tools (--configure): subprocess installed post-installation script returned error exit status 1 No apport report written because MaxReports has already been reached Processing triggers for libc-bin ... ldconfig deferred processing now taking place Errors were encountered while processing: linux-image-3.2.0-33-generic linux-image-3.2.0-34-generic linux-image-server linux-server initramfs-tools E: Sub-process /usr/bin/dpkg returned an error code (1) Not sure whats wrong and why it cant process the linux-image files?

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• Business Analytics Monthly Index - October 2013

  - by p.anda

  Starting from this post we are providing a monthly summary. This provides a quick look at what has been happening in our Proactive Support Blog over the last month. Welcome to the first Monthly Index posting! Please let us know what you think and your suggestions are most welcome ... Oracle Business Analytics - Blog Monthly Index - October 2013 General Summary   Link   Introducing the Business Analytics Proactive Support Team - Outlining the Proactive Support Team function View Business Intelligence (BI) Summary   Link   OBIEE version 11.1.1.7.131017 has been released - Links to the latest OBIEE release information & downloads View Update to OBIEE Chrome 30 issue - Information for patch release for OBIEE Chrome issue View OBIEE problems with Chrome (update 30) - Highlight OBIEE 11.1.1.7.1 issue with latest Google Chrome update 30 View OBIEE 11.1.1.7.1 Sample App (V309 R2) released - Link and Information about the current OBIEE Sample App View OBIEE - APEX integration - An article discussing the OBIEE APEX Integration View Enterprise Performance Management (EPM) Summary   Link   Hyperion Smartview Assistance - Information & resources for Hyperion Smartview inc. OBIEE integration View Java update alert: issue with EAS 11.1.2.3 - Advisory of recent Java release and identified EAS problem + workaround View EPM troubleshooting Utilities - Outlining additional resources for troubleshooting EPM View EPM Infrastructure Tuning Guide released - Link to the EPM Infrastructure Tuning Guide (v.11.1.2.2 / 11.1.2.3) View Essbase - FormatString - Discussing Essbase "Typed Measures" View October EPM patch set updates released - Links to the October Patches for EPM View featuring - the DRM blog - Featuring one of our co-blogs that is very beneficial View Advisor Webcast Summary   Link   Advisor Webcast: EPM 11.1.2.3 new features in Financial Applications - Announcement for AW: New Features in FA   (recording post presentation via Doc ID 1456233.1 | Archived 2013) View Advisor Webcast: Troubleshooting Discoverer editions - AW: Discussing Discover Logs/Tracing/EUL Status Workbooks & more.   (recording post presentation via Doc ID 1456233.1 | Archived 2013) View

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• PublishingWeb.ExcludeFromNavigation Missing

  - by Michael Van Cleave

  So recently I have had to make the transition from the SharePoint 2007 codebase to SharePoint 2010 codebase. Needless to say there hasn't been much difficulty in the changeover. However in a set of code that I was playing around with and transitioning I did find one change that might cause some pain to others out there that have been programming against the PublishingWeb object in the Microsoft.SharePoint.Publishing namespace. The 2007 snippet of code that work just fine in 2007 looks like: using (SPSite site = new SPSite(url)) using (SPWeb web = site.OpenWeb()) {      PublishingWeb publishingWeb = PublishingWeb.GetPublishingWeb(web);     publishingWeb.ExcludeFromNavigation(true, itemID);     publishingWeb.Update(); } The 2010 update to the code looks like: using (SPSite site = new SPSite(url)) using (SPWeb web = site.OpenWeb()) {     PublishingWeb publishingWeb = PublishingWeb.GetPublishingWeb(web);     publishingWeb.Navigation.ExcludeFromNavigation(true, itemID); //--Had to reference the Navigation object.     publishingWeb.Update(); } The purpose of the code is to keep a page from showing up on the global or current navigation when it is added to the pages library. However you see that the update to the 2010 codebase actually makes more "object" sense. It specifies that you are technically affecting the Navigation of the Publishing Web, instead of the Publishing Web itself. I know that this isn't a difficult problem to fix, but I thought it would be something quick to help out the general public. Michael

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• ISC Bind support for GSS-TSIG DDNS Updates?

  - by netlinxman

  First, has anyone EVER configured ISC bind 9.5.0 OR greater with support for GSS-TSIG Dynamic DNS Updates AND gotten it to work? If so, what is the configuration that was used to make that happen? I feel close to having this working. I see that GSS cred passes w/o apparent error during the TKEY negotiation with an Active Directory DC and the BIND DNS server: client 192.168.0.30#52314: query gss cred: "DNS/[email protected]", GSS_C_ACCEPT, 4294967256 gss-api source name (accept) is [email protected] process_gsstkey(): dns_tsigerror_noerror client 192.168.0.30#52314: send But, when the Update is sent, it is refused: client 192.168.0.30#58330: update client 192.168.0.30#58330: updating zone 'example.com/IN': update failed: rejected by secure update (REFUSED) client 192.168.0.30#58330: send Does anyone have this working in the real world?

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• grub shows same linux image twice

  - by binW

  After a recent update, I get multiple entries for same linux kernel version in the boot menu. I have tried running update-grub2 but it also lists the same linux-image version twice i.e adnan@adnan-laptop:/boot$ sudo update-grub2 Generating grub.cfg ... Found linux image: /boot/vmlinuz-2.6.32-26-generic Found initrd image: /boot/initrd.img-2.6.32-26-generic Found Windows 7 (loader) on /dev/sda1 Found linux image: /boot/vmlinuz-2.6.32-26-generic Found initrd image: /boot/initrd.img-2.6.32-26-generic Found memtest86+ image: /boot/memtest86+.bin done As you can see vmlinuz and initrd are found multiple times. But there is only one vmlinuz and initrd file in /boot adnan@adnan-laptop:/boot$ ls -l total 15120 -rw-r--r-- 1 root root 646144 2010-11-24 15:58 abi-2.6.32-26-generic -rw-r--r-- 1 root root 110601 2010-11-24 15:58 config-2.6.32-26-generic drwxr-xr-x 3 root root 4096 2011-01-01 18:59 grub -rw-r--r-- 1 root root 8335528 2010-12-20 23:36 initrd.img-2.6.32-26-generic -rw-r--r-- 1 root root 160280 2010-03-23 14:40 memtest86+.bin -rw-r--r-- 1 root root 2156100 2010-11-24 15:58 System.map-2.6.32-26-generic -rw-r--r-- 1 root root 1336 2010-11-24 16:00 vmcoreinfo-2.6.32-26-generic -rw-r--r-- 1 root root 4050080 2010-11-24 15:58 vmlinuz-2.6.32-26-generic Can some one tell me why does update-grub2 finds vmlinuz and initrd twice? and how to stop this from happening.

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• Bug fix for Eclipse runtime plugin

  - by Peter Benedikovic

  This blog is intended to inform about bug fix that solves this issue. Before continuing further, one important note – the linux and mac users do not need to read further because this bug appears only on Windows.  The problem was that the runtime plugin registered new runtime and server each time the Eclipse started. Users ended up with server view looking like this: I have created new runtime plugin which is now available at the update site http://download.java.net/glassfish/eclipse/indigo (or the same ending with juno for Juno users). You will still need to unistall the buggy plugin and (optionally but recommended) to remove runtimes created by this plugin. Here is the guide how to install bugfix: Uninstall buggy runtime plugin via menu Help->About Eclipse->Installation details. Remove runtimes created by old plugin – via Window->Preferences->Server->Runtime Environment. After pressing remove button you may be asked if you want to remove also the servers based on runtime being removed. Recommended is to do so. Now you can install new runtime plugin. Go to Help->Install New Software. You may ask why I haven‘t provided the update for buggy runtime which could be installed via Check for updates feature of Eclipse. It has two main reasons: The bug fix is needed only for Windows users so I didn't want to bother other users by updating working plugin. The runtime plugin has had structure that was not quite suitable for Eclipse update. This structure is now changed so future bugs (I am sure that there will be no such ;)) can be fixed by standard update. Have a good one!

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• Intel video driver upgrade now makes my external monitor display red-only with HDMI cable.

  - by Eli

  I have an HP G60 notebook with a Mobile Intel 4 Series Express Chipset video display (Driver version is 8.15.10.2021). OS is Win7 Home Premium. I also have an LG widescreen display that I was connecting to the laptop using an HDMI cable. It was working great, until I applied an Intel 4 Series Express Chipset update from Windows Update. After the update, if I plug the laptop to the monitor using the HDMI cable, it appears I only get the Magenta channel, cause that is all I see. If I connect with the VGA cable, it works fine. So, is it possible it is just the HDMI cable (which IS cheap in this case - fire sale at Blockbuster), and not related to the video driver update at all?

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• What are the maths behind 'Raiden 2' purple laser?

  - by Aybe

  The path of the laser is affected by user input and enemies present on the screen. Here is a video, at 5:00 minutes the laser in question is shown : Raiden II (PS) - 1 Loop Clear - Part 2 UPDATE Here is a test using Inkscape, ship is at bottom, the first 4 enemies are targeted by the plasma. There seems to be a sort of pattern. I moved the ship first, then the handle from it to form a 45° angle, then while trying to fit the curve I found a pattern of parallel handles and continued so until I reached the last enemy. Update, 5/26/2012 : I started an XNA project using beziers, there is still some work needed, will update the question next week. Stay tuned ! Update : 5/30/2012 : It really seems that they are using Bézier curves, I think I will be able to replicate/imitate a plasma of such grade. There are two new topics I discovered since last time : Arc length, Runge's phenomenon, first one should help in having a linear movement possible over a Bézier curve, second should help in optimizing the number of vertices. Next time I will put a video so you can see the progress 8-)

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• Single machine & KVM-only Eucalyptus installation ?

  - by brainstorm

  Hi, I was wondering if there's an easy way to install Eucalyptus on a single VT-enabled machine (all Front End, CC, NC..), without installing XEN along with it's specific kernel and dependencies: kernel-xen x86_64 2.6.18-194.3.1.el5 update 20 M xen x86_64 3.0.3-105.el5_5.3 update 1.9 M xen-libs x86_64 3.0.3-105.el5_5.3 update 155 k Only KVM. Is it possible ? Do I have to go for sources instead of packages ?

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• Unavailable packages repository

  - by bitmask

  I'm running ubuntu 11.10 (oneiric) on this machine, and suddenly, apt is unable to update properly. If I ask it to update its package information, by running apt-get update (or alternatively telling the update manager to "check"), it succeeds for about 120 packages (more precisely, I get about 120 Ign/Hit notes) and then says it cannot find universe Sources and restricted amd64: Hit http://de.archive.ubuntu.com oneiric-backports/multiverse Translation-en Hit http://de.archive.ubuntu.com oneiric-backports/restricted Translation-en Hit http://de.archive.ubuntu.com oneiric-backports/universe Translation-en Err http://de.archive.ubuntu.com oneiric/universe Sources 404 Not Found [IP: 141.30.13.20 80] Err http://de.archive.ubuntu.com oneiric/restricted amd64 Packages 404 Not Found [IP: 141.30.13.20 80] W: Failed to fetch http://de.archive.ubuntu.com/ubuntu/dists/oneiric/universe/source/Sources 404 Not Found [IP: 141.30.13.20 80] W: Failed to fetch http://de.archive.ubuntu.com/ubuntu/dists/oneiric/restricted/binary-amd64/Packages 404 Not Found [IP: 141.30.13.20 80] E: Some index files failed to download. They have been ignored, or old ones used instead. I manually checked the de server and cannot find anything wrong with the stuff it's complaining about. Also it looks pretty much like, say, the us mirror. But oddly enough, the IP it lists, seems to point to a debian package server, which obviously does not contain ubuntu packages. So, is this a local problem that I can fix somehow (and if so, how?) or is there actually some server down right now?

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• Oracle JDK 7u10 released with new security features

  - by Henrik Stahl

  A few days ago, we released JRE and JDK 7 update 10. This release adds support for the following new platforms: Windows 8 on x86-64. Note that Modern UI (aka Metro) mode is not supported. Internet Explorer 10 on Windows 8. Mac OS X 10.8 (Mountain Lion) This release also introduces new features that provide enhanced security for Java applet and webstart applications, specifically: The Java runtime tracks if it is updated to the latest security baseline. If you try to execute an unsigned applet with an outdated version of Java, a warning dialog will prompt you to update before running the applet. The Java runtime includes a hardcoded best before date. It is assumed that a new version will be released before this date. If the client has not been able to check for an update prior to this date, the Java runtime will assume that it is insecure and start warning the user prior to executing any applets. The Java control panel now includes an option to set the desired security level on a low-medium-high-very high scale, as well as an option to disable Java applets and webstart entirely. This level controls things such as if the Java runtime is allowed to execute unsigned code, and if so what type of warning will be displayed to the user. More details on the security settings can be found in the documentation. See below for a sample screenshot. The new update of the JRE and the JDK are available via OTN. To learn more about the release please visit the release notes.

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• Security Alert for CVE-2010-0886 and CVE-2010-0887 Released

  - by eric.maurice

  Hi, this is Eric Maurice again! Oracle just released a Security Alert to announce the availability of fixes for two vulnerabilities (CVE-2010-0886 and CVE-2010-0887) affecting Oracle Java SE and Oracle Java For Business. Both vulnerabilities only affect Java when running in a 32-bit web browser. These vulnerabilities are not present in Java running on servers or standalone Java desktop applications and do not impact any Oracle server based software. The first vulnerability (CVE-2010-0886) affects the Java Deployment Toolkit (version 6 update 10 through 19) on Windows only. The second vulnerability (CVE-2010-0887) affects the Java Plug-in (version 6 update 18 and 19) on Windows, Solaris and Linux. Both vulnerabilities may allow an attacker to run commands on the user's system with the privileges of the user, whose system may have become compromised by visiting a malicious web site. Oracle rated the severity of both vulnerabilities with a CVSS Base Score of 10.0 because many Windows users grant themselves administrative privileges. However, on other platforms, or for Windows users with limited privileges, the CVSS Base Score is only 7.5, because a successful exploitation of these vulnerabilities cannot result in a full compromise of the affected system. Users can quickly determine if they are running vulnerable versions of Java by pointing their browser to http://www.java.com/en/download/help/testvm.xml. Java SE users can visit http://www.java.com and download the most recent release of Java SE to address these vulnerabilities. Because of the criticality of these vulnerabilities, and the publicity they received as a result of their disclosure before the availability of a fix, Oracle recommends that all customers and Java users update their Java installation to the most recent version (6 update 20). For More Information: The advisory for the Security Alert for CVE-2010-0886 and CVE-2010-0887 is located at http://www.oracle.com/technology/deploy/security/alerts/alert-cve-2010-0886.html

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• Java Desktop Application For Network users

  - by Motasem Abu Aker

  I'm developing a desktop application using Java. My application will run in a network environment where multiple users will access the same database through the application. There will be basic CRUD opreations (Insert, Update, Delete, & select), which means there will be chances of deadlock, or two users trying to update the same record at same time. I'm using the following Java Swing for Clients (MVC). MySQL Server for database (InnODB). Java Web start. Now, MySQL is centralized on the network, and all of the clients connect to it. The Application for ERP Purpose. I searched the internet to find a very good solution to ensure data integrity & to make sure that when updating one record from one client, other clients are aware of it. I read about Socket-server-client & RESTful web services. I don't want to go web application & don't want to use any extra libraries. So how can I handle this scenario: If User A updates a record: Is there a way to update User B's screen with the new value? If user A starts updating a record, how can I prevent other users from attempting to update the same record?

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• CheckMemoryAllocationGame Sample

  - by Michael B. McLaughlin

  Many times I’ve found myself wondering how much GC memory some operation allocates. This is primarily in the context of XNA games due to the desire to avoid generating garbage and thus triggering a GC collection. Many times I’ve written simple programs to check allocations. I did it again recently. It occurred to me that many XNA developers find themselves asking this question from time to time. So I cleaned up my sample and published it on my website. Feel free to download it and put it to use. It’s rather thoroughly commented. The location where you insert the code you wish to check is in the Update method found in Game1.cs. The default that I put in is a line of code that generates a new Guid using Guid.NewGuid (which, if you’re curious, does not create any heap allocations). Read all of the comments in the Update method (at the very least) to make sure that your code is measured properly. It’s important to make sure that you meaningfully reference any thing you create after the second call to get the memory or else (in Release configuration at least) you will likely get incorrect results. Anyway, it should make sense when you read the comments and if not, feel free to post a comment here or ask me on Twitter. You can find my utilities and code samples page here: http://www.bobtacoindustries.com/developers/utils/Default.aspx To download CheckMemoryAllocationGame’s source code directly: http://www.bobtacoindustries.com/developers/utils/CheckMemoryAllocationGame.zip (If you’re looking to do this outside of the context of an XNA game, the measurement code in the Update method can easily be adapted into, e.g., a C# Windows Console application. In the past I mostly did that, actually. But I didn’t feel like adding references to all the XNA assemblies this time and… anyway, if you want you can easily convert it to a console application. If there’s any demand for it, I’ll do it myself and update this post when I get a chance.)

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• FastGate A20 Line And Himem.sys Issue With Updating BIOS

  - by Boris_yo

  I have been persistent with a thought to perform my first BIOS update ever through MS-DOS but have been postponing this task until today. Despite people telling me any bootable ISO will do it either through CD-ROM or RAMDRIVE, I am still having problems. First is the problem with CD-ROM driver trying to make it work with 4 driver files (cd1.SYS, cd2.SYS, cd3.SYS, cd4.SYS) as well as starting RAMDISK proved to be failure: CD-ROM XMS Allocation Error RAMDISK XMS Allocaton Error (X: and R: drives not working) This A20 line seemed to be the obstacle which then after a couple of searches pointed me to this article on Microsoft website. It seems that FastGate is the culprit which takes over A20 line and conflicts with himem.sys which should be handling it causing the driver to be unable to allocate memory resources. Albeit article suggests 2 workarounds which is disabling FastGate option or adding switch, I read that the former workaround could cause problems which involves later tinkering BIOS, disabling shadow copy etc. while the latter workaround can just hang system as stated in the link above. I assume it just hangs the boot process from image file though. Summing up the above, I am cautious and think it is risky to follow both workarounds because disabling FastGate or trying adding switch by trying available switches from 1-14 or 16, could crash the BIOS update process by itself. I could do this without the need for himem.sys with bootable USB thumbdrive by making it to be seen as USB-HDD, but some time ago I read that it is never a good idea to update BIOS from hard drive so even thought it is simulation, who knows... Maybe it will deactivate hard drive in the middle of the BIOS update process or even USB thumbdrive per se? One forum discussion was about updating BIOS and somebody suggested to not load himem.sys for some reason, but now that I think of it, what if BIOS update needs upper memory?

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• Capture RTSP stream from IP Camera and store

  - by Keerthi

  I've got a few IP Cameras which output an RTSP (h264 mpeg4) stream. Hitting the URL locally via VLC: rtsp://192.168.0.21:554/mpeg4 I can stream the camera and dump to disk (on my desktop). I'd like to however store these files on my NAS (FreeNAS). I was looking at ways to capture the RTSP stream and dump them to disk but I'm unable to find anything. Is it possible to capture the stream on FreeBSD or Linux (RaspberryPi) and dump the streamed content to a disk local to Linux or FreeBSD - preferably every 30minutes? EDIT: The NAS is headless (HP N55L or something) and the RaspberryPi's are headless too. I've already looked into ZoneMinder but need something small. I was hoping maybe using Motion to detect motion on the stream but that will come later.

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• How to keep your third party libraries up to date?

  - by Joonas Pulakka

  Let's say that I have a project that depends on 10 libraries, and within my project's trunk I'm free to use any versions of those libraries. So I start with the most recent versions. Then, each of those libraries gets an update once a month (on average). Now, keeping my trunk completely up to date would require updating a library reference every three days. This is obviously too much. Even though usually version 1.2.3 is a drop-in replacement for version 1.2.2, you never know without testing. Unit tests aren't enough; if it's a DB / file engine, you have to ensure that it works properly with files that were created with older versions, and maybe vice versa. If it has something to do with GUI, you have to visually inspect everything. And so on. How do you handle this? Some possible approaches: If it ain't broke, don't fix it. Stay with your current version of the library as long as you don't notice anything wrong with it when used in your application, no matter how often the library vendor publishes updates. Small incremental changes are just waste. Update frequently in order to keep change small. Since you'll have to update some day in any case, it's better to update often so that you notice any problems early when they're easy to fix, instead of jumping over several versions and letting potential problems to accumulate. Something in between. Is there a sweet spot?

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