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• Whole Lotta Virtualization Goin' On

  - by rickramsey

  Lately we've published a lot of content about virtualization. Here's a sampling. Podcat: Technology Preview of Transcendent Memory Turns out that in a virtual environment, RAM is the bottleneck. Not because it's slow, it's not, but because each CPU still had to use its own RAM. Which gets expensive. In this podcast, Dan Magenheimer describes how Oracle and the open source community taught the guest kernel in Oracle Linux to share its memory with other CPU's. Transcendent memory will wind up saving large data centers a lot of money. Find out how. Tech Article: How to Use Oracle VM Templates This article describes how to prepare an Oracle VM environment to use Oracle VM Templates, how to obtain a template, and how to deploy the template to your Oracle VM environment. It also describes how to create a virtual machine based on that template and how you can clone the template and change the clone's configuration. Tech Article: How to Set Up a Load Balanced Application Across Two Oracle Solaris Zones Install Apache Tomcat on two Oracle Solaris zones. Connect them across a VPN. And let the Integrated Load Balancer in Oracle Solaris 11 manage traffic. Presto: high(er) availability in a single server. Tech Article: How to Install Oracle RAC on Oracle Solaris Zone Clusters Learn how to implement a multi-tiered database environment that isolates database tiers and administrative domains, while taking advantage of centralized (and simpler) cluster admin. For fans of Jerry Lee Lewis If you're a fan of Jerry Lee Lewis, you might enjoy this video. - Rick Website Newsletter Facebook Twitter

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• PARTNER WEBCAST (June 4): Enhance Customer experience with Nimble Storage SmartStack for Oracle with Cisco

  - by Zeynep Koch

  Live Webcast: Enhance Customer experience with Nimble Storage SmartStack for Oracle with Cisco A webcast for resellers who sell Oracle workloads to customers  Wednesday, June 4, 2014, 8:00 AM PDT /11 AM EDT  Register today Nimble Storage SmartStack™ for Oracle provides pre-validated reference architecture that speed deployments and minimize risk.  IT and Oracle administrators and architects realize the importance of underlying Operating System, Virtualization software, and Storage in maintaining services levels and staying in budget.  In this webinar, you will learn how Nimble Storage SmartStack for Oracle provides a converged infrastructure for Oracle database online transaction processing (OLTP) and online analytical processing (OLAP) environments with Oracle Linux and Oracle VM. SmartStack delivers the performance and reliability needed for deploying Oracle on a single symmetric multiprocessing (SMP) server or if you are running Oracle Real Application Clusters (RAC) on multiple nodes. Nimble Storage SmartStack for Oracle with Cisco can help you provide: Improved Oracle performance Stress-free data protection and DR of your Oracle database Higher availability and uptime Accelerate Oracle development and improve testing All for dramatically less than what you’re paying now Presenters: Doan Nguyen, Senior Principal Product Marketing Director, Oracle Vanessa Scott , Business Development Manager, Cisco Ibrahim “Ibby” Rahmani, Product and Solutions Marketing, Nimble Storage Join this event to learn from our Nimble Storage and Oracle experts on how to optimize your customers' Oracle environments. Register today to learn more!

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• Running ADF Essentials in Tomcat

  - by Rodrigues, Raphael

  Oracle released a few days ago ADF Essentials, which is a free version of its Oracle ADF Framework. Oracle ADF Essentials can run on the Glassfish Application Server, well explained by Shay here  . Glassfish is also certified to run ADF Essentials Application. However, It could be possible to run ADF Essentials Applications in a Java EE Container. So, I’ll describe the steps to run the ADF Faces Rich Client demo application into a Tomcat 7. Before we start, you should download the files: • Apache Tomcat 7 : http://tomcat.apache.org/download-70.cgi • Oracle ADF Essentials 11.1.2.3 : http://www.oracle.com/technetwork/developer-tools/adf/downloads/index.html • Oracle ADF Faces Components Demo 11.1.2.3: http://www.oracle.com/technetwork/developer-tools/adf/downloads/index.html Steps: 1. Extract your tomcat 7. In my case, I choose D:\ apache-tomcat-7.0.29 2. Extract ADF Essentials zip file inside the %TOMCAT_HOME%\lib 3. Put the rcf-dvt-demo.war file inside the %TOMCAT_HOME%\webapps 4. Open the file %TOMCAT_HOME%\bin\catalina.bat (or .sh if you’re in linux environment) and add in the end of the line ‘set JAVA_OPTS=%JAVA_OPTS% %LOGGING_CONFIG%’ this -Xms1024m -Xmx1024m If you don’t do this, probably when you start you’ll see a OutOfMemory error. 5. Here is the little trick, tomcat does not come with jsf jar’s, so you have to put there. So, I went to the Oracle Jdeveloper 11.1.2 instalation and search for this files: • jsf-api.jar • jsf-impl.jar • glassfish.jstl_1.2.0.1.jar 6. You’re ready to start tomcat in %TOMCAT_HOME%\bin\startup.bat If everything is fine, you will be able to open your favourite browser and type http://localhost:8080/rcf-dvt-demo/faces/index.jspx

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• local cache for NAS or network folder

  - by HugoRune

  I am planning to build a network attached storage (NAS) server. Is there a way to cache frequently acccessed files from the remote storage automatically on the local PC? (I am not looking for a way to sync whole folders like rsync, but rather something that automatically and transparently caches the last accessed 50 gb of files.) Ideally I am searching for something that caches writes as well as reads, since only one pc will be accessing the server (and one day of lost changes if the local cache is damaged would be acceptable) I looked into windows offline files, but as far as I could tell this requires manual interaction to disconnect the server or go into offline mode in order to use the cache. The server would probably be running Linux or freeNAS, the pc runs Windows xp, but could be upgraded to 7 if required.

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• Disk Redundancy across different server

  - by Mascarpone

  I have 3 servers, all with the same specs: Intel CPU 8 GB RAM Linux or BSD Single 2TB desktop SATA with more than 10K Hours of operation, with only less than 300 GB Used My provider cannot install a second hard drive, but can guarantee me that the drive will be replaced immediately in case of failure, with another equally crappy drive. The likelihood of drive failure is high, and since I can't use RAID, I was thinking about keeping a back up of each machine on all the other machines, so that there are always 2 copies on 2 different drives, plus the original. I would synchronize the drives every hour, with rsync, to guarantee some sort of redundancy, since bandwidth inside the DC is free, so it would be much cheaper than offsite backup. (A daily offiste backup is kept anyhow). What do you think? Any suggestion?

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• Specifying an Internal (LAN) DNS Server in Netgear DGND3700 (N600) router

  - by Mus

  I have a DNS server running on a linux machine on my LAN which has domains for a few devices in my LAN. The resolve.conf file has google and the isp nameservers in it, as well as itself. Dunno if that helps or hinders but this setup has worked for years. I used to have a Thomson 585 ADSL router where I set the internal DNS Server as the primary DNS and the ISPs DNS server as the secondary. True enough all connected devices could access domains specified in the internal DNS. Recently I had to replace the Thomson router with a Netgear DGND3700 (N600) ADSL router. The problem is that if I specify the internal DNS server in this router, I lose internet connection as well as connection to the router itself. Does anyone know how I can use the internal DNS as the primary in the router?

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• Simple recursive DNS resolver for debugging (app or VM)

  - by notpeter

  I have an issue which I believe is caused by incorrect DNS queries (doubled subdomains like _record.host.subdomain.tld.subdomain.tld) when querying for SRV records. So I need to an alternate DNS server with heavy logging so I can see every query (especially stupid ones), acting as a recursive resolver with the ability create records which override real DNS records so I can not only find the records it's (wrongly) looking for, but populate those records as well. I know I could install a DNS server on yet another linux box, but I feel like this is the sort of thing that someone may already setup a simple python script or single use vm just for this purpose.

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• PC BluRay - Multichannel HD Audio output

  - by sheepsimulator

  When playing a BluRay movie on a PC (any OS, Mac/Win/Linux), I have some questions about audio output: When playing a BluRay disc on the PC using a BluRay player program, can it decode the multichannel (7.1) LPCM/ Dolby Digital Plus / Dolby TrueHD / DTS-HD / DTS-HDMA soundtracks in their HD formats (ie, without downmixing to Dolby Digital or DTS or PCM) and output the audio directly to the soundcard's 7.1 line-level analog outputs? Is it possible to bitstream the the multichannel (7.1) LPCM/ Dolby Digital Plus / Dolby TrueHD / DTS-HD / DTS-HDMA soundtracks in their HD formats (ie, without downmixing to Dolby Digital or DTS or PCM) over the HDMI output to a receiver when using a BluRay player program? I'd kinda like to know. I'm contemplating building a home theater PC, and the above functionality is important. I'd prefer that #1 is possible, actually, because it would mean I wouldn't have to buy a receiver.

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• Parse HTTP requests through Wireshark?

  - by diogobaeder

  Hi, guys, Is there any way to parse HTTP request data in wireshark? For example, can I expose the request parameters upon an HTTP GET request (being sent by my machine), so that I don't need to read the (sometimes) truncated URL and find them by myself? I was using Tamper Data and Firebug, on my Firefox, to analyse these requests, but they're not as reliable as a stand-alone tool for monitoring my network interface, but wireshark keeps data too raw concerning HTTP flow. If you guys know any other stand-alone tool that does this (must be Linux-compatible), please tell me. Thanks!

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• Redirect users to internal webpage on first visit

  - by Sihan Zheng

  I have a lan of maybe 20 - 30 computers, and a Windows server 2003 server on hand (I can also run any x86 Linux distro). What I am trying to do, is to redirect users to a webserver inside the LAN the first time they visit certain domains. For example, the first time a user visits "google.com", they will be redirected to 192.168.1.2 (a webserver, where they will be shown a custom webpage), attempts after that will go to google. Pretty much what I am trying to do, is to provide a captive server like service, showing people a custom webpage the first time they try to access certain websites (but not others). I'm pretty flexable on how this can be done, as long as it works. Can you guys give me an idea on how to approach this problem? I am looking for (hopefully) a free solutions. Thanks

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• Can I switch input methods while Caps Lock is being held down on Windows?

  - by Syzygy

  On my Linux computer, my keyboard switches from English to Serbian when I hold the Caps Lock key. For example, to write c all I have to do is hold Caps Lock, and press the key where c is on the Serbian keyboard (in this case, they key is ; on the English keyboard). When I release Caps Lock, the keyboard "switches back" to English, so that if I press ; I get ; as desired. Super useful. Please note that I know how to change the keyboard layout. I want to use Caps Lock as a modifier key to change the language only while being held down! Is there a way to replicate this behavior on Windows 7 or Windows 8?

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• How to easily upgrade MySQL 5.0.32 to MySQL 5.1.20 or higher on Debian Etch?

  - by Ferdy

  I have a home server running Debian Etch with MySQL 5.0.32 on it. I'm not much of a Linux administrator but two years ago I installed the server and it runs fine. I used the official MySQL package for Debian at that time. Since then I have been happily making use of it. Now I need to use a MySQL function that is only available in MySQL 5.1.20 and higher. Therefore I would like to upgrade. I'm not that confident in messing with something I need every day so I wanted to check with you what the best upgrade path would be? Obviously I prefer a simple upgrade that keeps my database, users and settings in place as they are now.

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• Amazon ec2 folder missing

  - by CQM

  To set permissions on the settings file On your Amazon EC2 instance, at a command prompt, use the following command to set permissions: sudo chmod 666 /var/www/html/sites/default/settings.php except I don't have a www folder in my instance [ec2-user@ip-10-242-118-215 ~]$ cd / [ec2-user@ip-10-242-118-215 /]$ ls bin cgroup etc lib local media opt root selinux sys usr boot dev home lib64 lost+found mnt proc sbin srv tmp var [ec2-user@ip-10-242-118-215 /]$ cd var [ec2-user@ip-10-242-118-215 var]$ ls account db games local log nis preserve run tmp cache empty lib lock mail opt racoon spool yp Please advise, did I forget to install something that the amazon instructions assumed I knew about? Running 64bit Amazon linux ami march 2012 I feel like the webserver is missing?

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• Monitor RAM usage on CentOS and restart Apache at a certain usage

  - by Chris

  Hi, I'm running a CentOS 5.3 server with a basic LAMP stack. I've optimized LAMP and my code to run efficiently as possible, but Apache has a memory leak somewhere that kills my server every hour or so. What is the best way to write a script that will monitor the memory usage and if it peaks over, say, 450MB kill all the Apache processes and restart Apache. I know C++/PHP and basic Linux server administration but I'm not familiar with Perl or bash scripting. I'd be open to learn any solutions, though, as a temporary solution while I find the issue.

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• How to start vim without executing /etc/vimrc?

  - by florin

  On my Linux server at work, the admins did not install cscope, and I installed it from source in my home directory and added it to the $PATH. The trouble is, the /etc/vimrc has a reference to /usr/bin/cscope which does not exist and everytime I start vim, it complains about that and I have to press for that message to go away. It is interesting that if I remove cscope from my $PATH, I don't get that behavior - so it is possible that vim is testing that cscope exists somewhere, and only then executing the cscope configuration - but then it gets it wrong! So my question is: can I set something up in my .vimrc so it does not source the global /etc/vimrc? I don't want to move cscope out of PATH, as I don't want to type the full directory name every time I run it from the command line.

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• How to deal with OpenGL and Fullscreen on OS X

  - by Armin Ronacher

  I do most of my development on OS X and for my current game project this is my target environment. However when I play games I play on Windows. As a windows gamer I am used to Alt+Tab switching from within the game to the last application that was open. On OS X I currently can't find either a game that supports that nor can I find a way to make it possible. My current project is based on SDL 1.3 and I can see that cmd+tab is a sequence that is sent directly to my application and not intercepted by the operating system. Now my first attempt was to hide the rendering window on cmd+tab which certainly works, but has the disadvantage that a hidden OpenGL window in SDL cannot be restored when the user tabs back to the application. First of all, there is no event fired for that or I can't find it, secondly the core problem is that when that application window is hidden, my game is still the active application, just that the window disappeared. That is incredible annoying. Any ideas how to approximate the windows / linux behavior for alt+tab?

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• What can I do to prevent my user folder from being tampered with by malicious software?

  - by Tom Wijsman

  Let's assume some things: Back-ups do run every X minutes, yet the things I save should be permanent. There's a firewall and virus scanner in place, yet there happens to be a zero day attack on me. I am using Windows. (Although feel free to append Linux / OS X parts to your answer) Here is the problem Any software can change anything inside my user folder. Tampering with the files could cost me my life, whether it's accessing / modifying or wiping them. So, what I want to ask is: Is there a permission-based way to disallow programs from accessing my files in any way by default? Extending on the previous question, can I ensure certain programs can only access certain folders? Are there other less obtrusive ways than using Comodo? Or can I make Comodo less obtrusive? For example, the solution should be proof against (DO NOT RUN): del /F /S /Q %USERPROFILE%

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• wireless detected but Can't connect to network, Wifi card intel pro wireless N100 BGN

  - by Alexandre777

  Thanks in advance, I installed Linux Mint kernel 3.0.0-12 x64 ,wireless is detected and I configure it in network manager but can't coonect, there are the results of command line: $ iwconfig lo no wireless extensions. eth0 no wireless extensions. wlan0 IEEE 802.11bgn ESSID:off/any Mode:Managed Access Point: Not-Associated Tx-Power=off Retry long limit:7 RTS thr:off Fragment thr:off Power Management:off $ sudo lshw -C network** *-network description: Wireless interface product: Centrino Wireless-N 1000 vendor: Intel Corporation physical id: 0 bus info: pci@0000:03:00.0 logical name: wlan0 version: 00 serial: 00:1e:64:51:c9:d6 width: 64 bits clock: 33MHz capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless configuration: broadcast=yes driver=iwlagn driverversion=3.0.0-12-generic firmware=39.31.5.1 build 35138 latency=0 link=no multicast=yes wireless=IEEE 802.11bgn resources: irq:48 memory:d7400000-d7401fff *-network description: Ethernet interface product: AR8131 Gigabit Ethernet vendor: Atheros Communications physical id: 0 bus info: pci@0000:06:00.0 logical name: eth0 version: c0 serial: 48:5b:39:99:8f:16 size: 100Mbit/s capacity: 1Gbit/s width: 64 bits clock: 33MHz capabilities: pm msi pciexpress vpd bus_master cap_list ethernet physical tp 10bt 10bt-fd 100bt 100bt-fd 1000bt-fd autonegotiation configuration: autonegotiation=on broadcast=yes driver=atl1c driverversion=1.0.1.0-NAPI duplex=full firmware=N/A ip=192.168.1.2 latency=0 link=yes multicast=yes port=twisted pair speed=100Mbit/s resources: irq:51 memory:d3800000-d383ffff ioport:8000(size=128 $ rfkill list all 0: phy0: Wireless LAN Soft blocked: no Hard blocked: no Thank you.

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• Windows Deployment Services

  - by timbrigham

  I have a slightly advanced Windows Deployment Services setup. My router hands out DHCP addresses, including the following config. ip dhcp pool Servers_100 network 192.168.100.0 255.255.255.0 bootfile boot\\x86\\pxelinux.0 next-server 192.168.100.50 default-router 192.168.100.1 dns-server 192.168.100.80 192.168.100.81 This works perfectly for other subnets - I have a couple screens in my pxelinux that allow me to select my various Linux installers or enter the windows preboot environment. For some reason I'm only receiving the default bootfile that opens to the windows preboot environment. Any idea why?

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• Write-but-not-delete permissions on SAMBA

  - by m6a-uds

  Hi! I installed samba on my linux server for public file sharing on the LAN. I works great currently, but I would like to add some security: People from LAN should be able to Read files present and Add new ones, but not delete files. I want to keep this privilege for me ;-) How should-I do this? I have set up a "admin" account having full access even to deletion. There is just left to configure the "guest" acount. Google isn't helping that much right now...

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• server attack monitor

  - by Basit

  we been getting some attacks on our server i think, cause our server gets down every day now.. i want to monitor what is causing server to go down or if there is any attack from some site or if its crawler doing the attack. is there any tool for this? if not, what should i do to find out what is causing the problem. Edited my server is linux i have cpanel control panel i haven't checked the logs i have done nothing to see whatis causing the problem thats why i came here to ask how can i find out what is causing the problem. there is guy from our server, he said its server ram, they told us to extend more ram, but there isnt many sites on it and not many load from that sites eaither, so i dont see why our 2gb ram is getting used at. so i want to find out :/

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• Compose key on Windows

  - by Craig McQueen

  On Linux, the Compose key is a great way to enter many symbols. E.g. m-dash — by pressing Compose then --- ö by pressing Compose then :o Euro € by pressing Compose then C= (The Compose key function can be assigned to various keyboard keys, such as right/left Alt, right/left Windows key.) I really miss the Compose key when using Windows. I've looked but so far haven't found any way to get equivalent Compose key functionality on Windows. Does anyone know of how to do it?

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• grep pattern interpretted differently in 2 different systems with same grep version

  - by Lance Woodson

  We manufacture a linux appliance for data centers, and all are running fedora installed from the same kickstart process. There are different hardware versions, some with IDE hard drives and some SCSI, so the filesystems may be at /dev/sdaN or /dev/hdaN. We have a web interface into these appliances that show disk usage, which is generated using "df | grep /dev/*da". This generally works for both hardware versions, giving an output like follows: /dev/sda2 5952284 3507816 2137228 63% / /dev/sda5 67670876 9128796 55049152 15% /data /dev/sda1 101086 11976 83891 13% /boot However, for one machine, we get the following result from that command: Binary file /dev/sda matches It seems that its grepping files matching /dev/*da for an unknown pattern for some reason, only on this box that is seemingly identical in grep version, packages, kernel, and hardware. I switched the grep pattern to be "/dev/.da" and everything works as expected on this troublesome box, but I hate not knowing why this is happening. Anyone have any ideas? Or perhaps some other tests to try?

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• MacPorts, Fink, etc.

  - by Ben Alpert

  On my Mac OS X (10.5, soon to be 10.6) machine, how would you recommend I install various software that's been ported from Linux? I don't install such software very frequently, but I've been using MacPorts and it always seems quite slow, presumably because it has to compile the packages on-the-fly. I'd much prefer a package management system that has binary packages, saving me the need to compile things every time I want to download something new. I think Fink has binaries for some of the packages, but I usually see MacPorts recommended as the system to use. Which do you think works better and why? (Or is there another system that I haven't heard of?)

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• RDMA architecture - do you need adapters on both ends?

  - by Bobb

  I know Linux can use RDMA NICs like Solarflare... I just found Intel has something like that NetEffect cards. But Intel is talking all about clusters.. Can someone please explain. If I want low-latency networking and install RDMA NIC on my server. Is there limitation on where the cable can go? Is there a specific device expected on the other end? Is it special RDMA switch or RDMA adapter before switch or what? Why is this cluster talk? What if I want a single server with Windows (I can install HPC Windows or Windows 2008 R2)?

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