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• Announcement: Oracle SuperCluster T5-8

  - by uwes

  Oracle's Fastest Engineered System On 27th of June we are announcing Oracle SuperCluster T5-8, Oracle’s fastest engineered system. Combining powerful virtualization and unique Exadata and Exalogic optimizations, SuperCluster is optimized to run both database and enterprise applications, and is ideal for consolidation and private cloud. SuperCluster is a complete system integrating SPARC T5-8 servers, Exadata Storage Servers, ZFS Storage Appliance, InfiniBand network and software, delivering extreme performance, no single point of failure, and highest efficiency while reducing risks and costs. Leverage Oracle SuperCluster T5-8 for IBM and HP competitive displacements, upgrading existing data centers, or new customer deployments. Please read the Product Bulletin on Oracle HW TRC for more details. (If you are not registered on Oracle HW TRC, click here ... and follow the instructions..) For More Information Go To: Oracle SuperCluster T5-8 oracle.com OTN

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• CIOs: Stop Mandating Training

  - by merrillaldrich

  I love to learn about new technology, and I especially love a long deep-dive technical session with a real expert or a well-crafted, inches thick technical book. Even if either one is expensive. Learning is probably my favorite thing to do. Yet I stand before you with an appeal: Stop “sending people to training.” Why would I say such a thing? Because failure is baked right into that very phrase: “sending people to training.” Death by Training Most of us in the IT world have probably experienced this...(read more)

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• KWin Can Cause A Performance Hit Too, But It's Different From Compiz

  <b>Phoronix:</b> "This surprised many so we published another article entitled The Cost Of Running Compiz where we showed the performance penalties of a compositing window manager with different hardware and drivers. This led some to ask whether the performance of KWin also causes the OpenGL frame-rate to drop, so here are those KDE benchmarks."

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• Oracle Enterprise Manager 12c Release 2 Now Available

  - by Cinzia Mascanzoni

  Oracle announced general availability of Oracle Enterprise Manager 12c Release 2. The release introduces unique capabilities for deploying and managing business applications in an enterprise private cloud, such as Java Platform-as-a-Service (PaaS), enhanced business application management, and integrated hardware-software management for Oracle Exalogic Elastic Cloud. At Oracle OpenWorld 2012, on Sunday September 30th, the SIG Sunday program includes a dedicated track for Oracle Enterprise Manager. Learn more here.

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• replacing kernel on non-booting ec2 instance

  - by TheToolBox

  So I had an amazon ec2 instance crash during the update to 14.04LTS. Frustratingly, it appears the kernel might be bad (or at least that's what the log below says to me, I could totally be wrong). I'm able to mount the volume to another, working server, chroot the broken volume, and sudo apt-get remove linux-headers-3.MOSTRECENT. Unfortunately though, when I try sudo update-grub, it comes back with /usr/sbin/grub-probe: error: cannot find a device for / (is /dev mounted?). What am I missing? Here's the log from the server's attempted bootup: [H[J Booting 'Ubuntu 14.04 LTS, memtest86+' root (hd0) Filesystem type is ext2fs, using whole disk kernel /boot/memtest86+.bin ============= Init TPM Front ================ Tpmfront:Error Unable to read device/vtpm/0/backend-id during tpmfront initialization! error = ENOENT Tpmfront:Info Shutting down tpmfront xc: error: panic: xc_dom_core.c:621: xc_dom_find_loader: no loader found: Invalid kernel xc_dom_parse_image returned -1 close(3) Error 9: Unknown boot failure Press any key to continue... Thanks in advance!

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• Wifi problems after upgrading to 13.10

  - by Simon

  I just upgraded to Ubuntu 13.10, but since the upgrade I don't have internet access via wifi anymore. I can: See networks Connect to a network Ping myself (localhost, 192.168.0.103) I can't: Ping others (including other devices on the same wireless network, including the gateway/router) Resolve hosts Access any other external resource, whether on my own network or on the internet Using Wireshark, I noticed my computer is continuously sending ARP-requests like "Who has 192.168.0.1 [which is the gateway]? Tell 192.168.0.103". It doesn't get any replies though. When I ping another IP-address for which it knows the mac-address (from cache), it turns out a packet loss of 90% occurs, and even if a packet manages to arrive it takes around 3000ms. The output of route -n is: Kernel IP routing table Destination Gateway Genmask Flags Metric Ref Use Iface 0.0.0.0 192.168.0.1 0.0.0.0 UG 0 0 0 eth1 192.168.0.0 0.0.0.0 255.255.255.0 U 9 0 0 eth1 192.168.122.0 0.0.0.0 255.255.255.0 U 0 0 0 virbr0 Before upgrading, wifi worked fine. Using other devices, wifi still works fine.Resetting the router didn't help. Ethernet still works after upgrading. Any suggestions? Update: I'm using the wl driver. Here's the relevant output of some commands: lspci | grep Wireless 03:00.0 Network controller: Broadcom Corporation BCM4313 802.11bgn Wireless Network Adapter (rev 01) cat /etc/modprobe.d/blacklist.conf [...] blacklist mac80211 blacklist brcm80211 blacklist cfg80211 blacklist lib80211_crypt_tkip blacklist lib80211 blacklist b43 cat /etc/rc.local sudo modprobe -r lib80211 sudo insmod /lib/modules/3.2.0-30-generic-pae/kernel/net/wireless/lib80211.ko sudo insmod /lib/modules/3.2.0-30-generic-pae/kernel/net/wireless/lib80211_crypt_wep.ko sudo insmod /lib/modules/3.2.0-30-generic-pae/kernel/net/wireless/lib80211_crypt_tkip.ko sudo insmod /lib/modules/3.2.0-30-generic-pae/kernel/net/wireless/lib80211_crypt_ccmp.ko sudo modprobe wl exit 0 The last lines are probably how I got wireless working after the previous upgrade (wireless has been a problem after each upgrade). Update 2: added information about the exact hardware below. The hardware is an integrated device, so I ran lspci -nn | grep -i network. The output is: 03:00.0 Network controller [0280]: Broadcom Corporation BCM4313 802.11bgn Wireless Network Adapter [14e4:4727] (rev 01)

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• vmbuilder fails on chroot

  - by Bruce

  I am trying to install virtual machine with this command, but have no success: vmbuilder kvm ubuntu --verbose --suite precise --flavour virtual \ --part partitions.txt --ip 192.168.1.3 --hostname edb1 --arch amd64 \ -o --libvirt qemu:///system --user someuser --pass somepass \ --raw /home/virtual-machines/edb1.disk1.img \ --raw /home/virtual-machines/edb1.disk2.img \ --domain somedomain.com --mem 4096 --cpus 4 This is the error: ... I: Extracting xz-utils... I: Extracting zlib1g... W: Failure trying to run: chroot /tmp/tmp_JdKzu mount -t proc proc /proc , stderr: The host kernel is not original but modified by server provider. Why is the chroot needed for installation?

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• New sales kit for partners: Oracle Enterprise Manager 12c

  - by Javier Puerta

  Check out the latest Quick Reference Guides for Enterprise Manager 12c in the Knowledge Zone. The two-page Quick Reference Guide is designed to help partners uncover additional revenue opportunity by positioning Enterprise Manager in your sales engagement. Content includes elevator pitch for Enterprise Manager, tips on identifying target customers, qualifying questions to initiate customers discussion, supporting videos, references, and whitepapers for each customer scenario: Enterprise Manager 12c for Application Partners Enterprise Manager 12c for Hardware Partners Enterprise Manager 12c for Database Partners

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• Performance Tune IBM DB2 z/OS Applications using Resource Constraint Analysis

  For the DB2 for z/OS professional the two most common systems tuning scenarios are tuning a DB2 data sharing group or tuning a series of application SQL statements. The data sharing group environment can involve multiple hardware installations and many other cross-system features and functions such as coupling facilities and management policies. Resource constraint analysis is a useful tool in both situations.

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• How to get rid of crawling errors due to the URL Encoded Slashes (%2F) problem in Apache

  - by user14198

  The Google web crawler has indexed a whole set of URLs with encoded slashes (%2F) for our site. I assume it has picked up the pages from our XML sitemap file. The problem is that the live pages will actually result in a failure because of the Url Encoded Slashes Problem in Apache. Some solutions are mentioned here We are implementing a 301 redirect scheme for all the error pages. This should make the Google bot delete the pages from the crawling errors (no more crashing pages). Does implementing the 301s require the pages to be "live"? In that case we may be forced to implement solution 1 in the article. The problem is that solution 1 will pose a security vulnerability..

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• No wired and wireless connection found after upgrading 12.04

  - by ag108

  After upgrading 12.04 LTS, my wired connection works but no wireless connection found. I tried many suggestion for wireless connection on Ubuntu forum but nothing works for me. Now, maybe by mistake, I am also unable to connect Internet through wired connection. Now, (1) its says "No network devices available" and (2) in System Settings ? Hardware ? no additional driver icon is showing Please help. I don't know much about Ubuntu.

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• Why does the sudo command not work in chroot?

  - by katarina

  I just installed a 32-bit chroot to run on my 64-bit system. In the chroot environment, the sudo command doesn't work, it says sudo: command not found Also, when I try the su root command, my password doesn't work (su: authentication failure). What password do they want? I'm quite new to Ubuntu, so actually I don't really know what I'm doing. I am just trying to follow instructions. I solved this particular problem simply by starting the chroot by the command: katarina@ubuntu:~$ schroot -c oneiric_i386 -u root instead of the one I used the first time: katarina@ubuntu:~$ schroot -a I still have some other problems, but I guess that's not for this question.

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• Trouble updating metapackage

  - by jake

  I'm having trouble downloading xfce4 metapackage. I don't have a desktop yet just cmd line and this is my first time on linux. sudo apt-get install xfce4 brings back Unable to locate package xfce4 Does that with all packages, leads me to sudo apt-get update Leaves me with temporary failure resolving 'downloads-distro.mongodb.org' Read some solutions to fix this but it had me going in circles with no avail. Need to get this working from cmd prompt. So I'm having trouble updating and am lost here without a desktop client. If anyone can help that would be great.

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• ec2 instance won't boot!

  - by TheToolBox

  So I had a server lose connection while updating to 14.04LTS. Foolishly, it ended up getting rebooted, and now I'm here. I disconnected the volume and mounted it on another system, chrooted it, and updated the kernel. Still no dice. Any idea what the problem could be? Thanks in advance! The instance log is below: ******************* BLKFRONT for device/vbd/2049 ********** backend at /local/domain/0/backend/vbd/3005/2049 Failed to read /local/domain/0/backend/vbd/3005/2049/feature-barrier. Failed to read /local/domain/0/backend/vbd/3005/2049/feature-flush-cache. 16777216 sectors of 512 bytes ************************** [H[J Booting 'Ubuntu 14.04 LTS, memtest86+' root (hd0) Filesystem type is ext2fs, using whole disk kernel /boot/memtest86+.bin ============= Init TPM Front ================ Tpmfront:Error Unable to read device/vtpm/0/backend-id during tpmfront initialization! error = ENOENT Tpmfront:Info Shutting down tpmfront xc: error: panic: xc_dom_core.c:621: xc_dom_find_loader: no loader found: Invalid kernel xc_dom_parse_image returned -1 close(3) Error 9: Unknown boot failure Press any key to continue...

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• Asus Machine fails to start due to missing msvcr.dll - what?

  - by Malcolm Anderson

  So first off a thanks to the internet, knoppix and a post over at http://www.overclock.net/windows/879553-msvcr80-dll-missing-catastrophic-failure.html   My Symptoms: my laptop would not boot.  Would not let me get anywhere.  Just like the symptoms in the post.   Thankfully, all I had to do was go rename my avg directory and all was good.  But I needed something to boot from and I knew and trusted Knoppix from my past linux experimental days.    If it wasn't for Knoppix, I would have probably reformatted my machine and I didn't want that.

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• New Solaris Cluster!

  - by Jeff Victor

  We released Oracle Solaris Cluster 4.1 recently. OSC offers both High Availability (HA) and also Scalable Services capabilities. HA delivers automatic restart of software on the same cluster node and/or automatic failover from a failed node to a working cluster node. Software and support is available for both x86 and SPARC systems. The Scalable Services features manage multiple cluster nodes all providing a load-balanced service such as web servers or app serves. OSC 4.1 includes the ability to recover services from software failures, failure of hardware components such as DIMMs, CPUs, and I/O cards, a global file system, rolling upgrades, and much more. Oracle Availability Engineering posted a brief description and links to details. Or, you can just download it now!

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• Ubuntu Server driver source catalog

  - by SRU IT

  Where do I find this drivers on my .iso image for the server software, or what is the ftp: location to download these files as those are the two options i am given on how to solve this issue. ubuntu-server 11.10, hardware: dell r210 what I am reading is that I am possibly missing 'mpt2sas' driver somewhere in this boot disc. I'm attempting to download a different version in the hopes that the mistake I made was downloading software meant for an AMD architecture.

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• can't get past the login screen

  - by Greg

  Using a brand-new install to a usb stick of 12.04 lts installed by Universal USB Installer 1.8.9.8. I log in as "ubuntu" with a blank password, the console appears for a second or two with text scrolling past and then it returns to the login page. I've used the same usb stick on several computers with the same results, so it doesn't appear to be a hardware/driver issue. I have not tried installing to the hard drive, because I wanted to try it out first.

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• Tune your Linux kernel with sysctl

  <b>Ghacks:</b> "Today most kernels work out of the box with most hardware. But there are times when you could squeeze out a bit more performance or even lighten your kernel on the fly. You can do that with the sysctl command."

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• Oracle Solaris Cluster 4.1 Released

  - by Larry Wake

  Today we announced the release of Oracle Solaris Cluster 4.1 ( download ; existing customers can just update from the package repository ).New capabilities include:  Oracle Solaris 10 Zone Clusters: The easiest way to update and consolidate existing Solaris 10 application environments is with Oracle Solaris 10 Zones within Oracle Solaris 11 -- not only do you get higher system utilization, but you can immediately leverage new features such as network virtualization.With Oracle Solaris Cluster 4.1, you can now cluster these zones, for even higher availability. Expanded disaster recovery operations: Oracle Solaris Cluster 4.1 introduces managed switchover and disaster-recovery takeover of applications and data using ZFS Storage Appliance replication services in a multi-site, multi-cluster configuration. Faster application recovery with improved storage failure detection and resource dependency management. Labeled security support for providing both high availability and high security, leveraging Oracle Solaris 11 Trusted Extensions. Learn more: Oracle Solaris Cluster at the Oracle Technology Network Data Sheet  What's New in Oracle Solaris Cluster 4.1  FAQs

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• Basic memcached question

  - by Aadith

  I have been reading up on distributed hashing. I learnt that consistent hashing is used for distributing the keys among cache machines. I also learnt that, a key is duplicated on mutiple caches to handle failure of cache hosts. But what I have come across on memcached doesn't seem to be in alignment with all this. I read that all cache nodes are independent of each other and that if a cache goes down, requests go to DB. Theres no mention of cache miss on a host resulting in the host directing the request to another host which could either be holding the key or is nearer to the key. Can you please tell me how these two fit together? Is memcached a very preliminary form of distributed hashing which doesnt have much sophistication?

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• How do I create tileable solid noise for map generation?

  - by nickbadal

  Hey guys, I'm trying to figure out how to generate tileable fractals in code (for game maps, but that's irrelevant) I've been trying to modify the Solid Noise plug-in shipped with GIMP (with my extremely limited understanding of how the code works) but I cant get mine to work correctly. My modified code so far (Java) GIMP's solid noise module that I'm basing my code off of (C) Here is what I'm trying to achieve but This is what I'm getting So if anybody can see what I've done wrong, or has a suggestion how I could go about doing it differently, I'd greatly appreciate it. Thanks in advance. And if I'm asking way to much or if just a huge failure at life, I apologize.

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• Ubuntu 13.10 - Wifi not re-connecting after suspend

  - by Matthew

  I upgraded the other day from Ubuntu 13.04 to 13.10 on my ZaReason laptop, and the WiFi doesn't reconnect after suspend. In 13.04, pressing Fn+F2 turned network connections back on after suspend. The 'soft' wireless hardware switch. But in 13.10, that doesn't work, and trying to enable networking in the networking menu doesn't work either. So I have to restart every time. Any suggestions to make it work?

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• Which of these courses are the hardest and why?

  - by DSL Client

  Which of these courses are the hardest and why? What should I watch out for? Probability and Statistics for Computer Science Introduction to Software Engineering Data Structures and Algorithms Operating Systems Introduction to Theoretical Computer Science System Hardware Advanced Program Design with C++ Information Systems Security Computer Architecture Databases Web Programming Computer Graphics Digital System Design

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• What is an "integration script" and why would I want one?

  - by ændrük

  When I navigate to Launchpad in Firefox, a pop-up appears: I think, despite its failure to form a coherent question, it's trying to ask me if I want to install an "integration script" called "unity-webapps-launchpad". Sadly, it does not provide me with enough information to make an informed decision, nor does it refer me to a source where I can learn more about it. The top result in my web searches on the topic is my own bug report. While this cyclical phenomenon provides a brief source of amusement, it is ultimately unhelpful. So, once again, I've come to Ask Ubuntu for a nudge in the right direction. What is this thing?

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