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• problem in exporting a partition on a usb stick as nfs volume

  - by Bond

  I have a USB disk which has 2 partitions.I exported one of them (on NFS) and now I am trying to mount it at client machine. Each time it gets error mount -t nfs 192.168.1.19:/media/vol2 /mnt/nfs/ mount.nfs: access denied by server while mounting 192.168.1.19:/media/vol2 Here is the /etc/exports file entry showmount -e on nfs server gives Export list for bond: /media/vol2 */24 On the client machine nfs-client package is installed. What more I need to check? Is it logged some where?

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• Why are network printers not available in the Add Printer Wizard...when run over a network?

  - by Kev

  From a Windows 2003 server machine I browsed the network to an XP client (\computername in Explorer) then double-clicked Printers and Faxes and then Add Printer. In the wizard, normally the second screen asks if you want to install a local printer or a network printer. Well, in this case, it seems to assume I want a local printer, because the second screen is what would normally be the third screen if you chose local printer and clicked Next. I want to install a network printer on a remote machine for its local users. Is this not possible? If not, why not?

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• SSH access from outside to a pc inside network

  - by Raja

  I have a static IP and ADSL router linked to a linksys wireless router to which all my machines are connected. I would want to setup SVN on one of machines and provide SSH access which should be accessible by users outside my network. Would this be possible? Even just SVN access through web should be fine. Please let me know what all things should be done to achieve this ? I have Ubuntu VM running in a iMac Leopard machine and another 2 Win 7 32/64 bit machines. I can setup standalone Ubuntu or Win XP on another machine. Thanks, Raja.

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• Recovering text files in terminal using grep on Mac OS X Snow Leopard

  - by littlejim84

  I foolishly removed some source code from my Mac OS X Snow Leopard machine with rm -rf when doing something with buildout. I want to try and recover these files again. I haven't touched the system since to try and seek an answer. I found this article and it seems like the grep method is the way to go, but when running it on my machine I'm getting 'Resource busy' when trying to run it on the disk. I'm using this command: sudo grep -a -B1000 -A1000 'video_output' /dev/disk0s2 > file.txt Where 'dev/disk0s2' is what came up when I ran df. I get this when running: grep: /dev/disk0s2: Resource busy I'm not an expert with this stuff, I'm trying my best. Please can anyone help me further? I'm on the verge of losing two days of source code work! Thank you

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• chrome memory and cpu footprint

  - by nmizar

  I've searched the forums for an answer but I couldn't find quite the answer I was looking for [1] , so I thought I it could as well be of interest to more people around here. I carry out a big part of my job on the browser (or for the browser, if you want to put it that way). I tend to use Chrome, because it's got natively many of the newest features that I need (DevTools stuff, mainly but not only). BTW, I'm usually running the last available Chrome version/build on a desktop Vaio with 4GB RAM and dual core CPU and Ubuntu 12.04 as distro and Gnome as window manager. So, I was curious about a) why does Chrome spawn so many threads even opening only three of four tabs and b) is there any way to allocate more memory to Chrome to prevent its performance from degrading? Thanks in advance, Nacho PS [1] I found threads about Chrome freezing or running out of memory but not about the reasons for this being so or for avoiding it to happen. PPS Of course, I could always buy a newer and more capable machine and that is exactly what I'm trying to evaluate: is this a question of outdated hardware or the problem will keep appearing on any (decently but not hugely sized) machine?

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• Windows Hosted Network Redirect to IIS

  - by rulestein

  I would like to setup a Windows 7 machine as a wifi hotspot that always redirects to the IIS web hosting on the same machine. I have the hotspot piece working with the built in hosted network of Widnows 7. The webhosting was easy enough with IIS. Now, how do I connect the 2? The idea is to have a standalone device that users will be able to connect to the wifi and any webpage they go to will redirect to the internal webpage. I only expect 1 or 2 users at a time and there won't be any internet access involved.

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• Can KVM CPU assignment count differ from physical hosts CPU count?

  - by javano

  I have read this question. I knew already that I could for example, have a quad core machine with four guests each having two vCPUs. As they don't all be require 100% CPU usage all the time, the scheduler would handle this for me. My question is about how this relates to a fail-over or migration situation; If host1 has two dual-core CPUs, and I assign guest1 four vCPUs (so it accessed all four physical cores), what will happen if I try and migrate it to host2 which only has one dual-core CPU? Can qemu-kvm emulate more vCPUs than there are physical? Or would I have to shut down the virtual machine, change the CPU assignment, migrate it, and then boot it back up (so no live migration)? Many thanks.

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• kinit gives me a Kerberos ticket, but no AFS token

  - by Tomas Lycken

  I'm trying to setup access to my university's IT environment from my laptop running Ubuntu 12.04, by (mostly) following the IT-department's guides on AFS and Kerberos. I can get AFS working well enough so that I can navigate to my home folder (located in the nada.kth.se cell of AFS), and I can get Kerberos working well enough to forward tickets and authenticate me when I connect with ssh. However, I don't seem to get any AFS tokens locally, on my machine, so I can't just go to /afs/nada.kth.se/.../folder/file.txt on my machine and edit it. I can't even stand in /afs/nada.kth.se/.../folder and run ls without getting Permission denied errors. Why doesn't kinit -f [email protected] give me an AFS token? What do I need to do to get one?

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• Is a matching entry in /etc/hosts required for hostname?

  - by JohnWoltman

  I was installing a Tomcat webapp that refused to work until I stumbled on someone else's issue with an unrelated product. The solution was to add the machine's name to /etc/hosts, to match the name returned by hostname. Is this required for general Linux networking to function correctly? My webapp is running in a virtual machine so that I can test the webapp, and I don't normally bother with the /etc/hosts file on VMs. I just shook my fist and cursed Tomcat and webapp's behavior. I read http://serverfault.com/questions/118823, but that doesn't say if it's required or not.

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• Nomachine 4 for X forwarding

  - by Yair

  I have been using nomachine nx client to connect from my mac to an ubuntu server for a while now and it has been a great experience. The most useful feature for me was the option to open up just one application on the remote machine, instead of a full remote desktop connection. I used to to open a terminal on the remote machine. Basically it was a much faster, much better replacement for ssh -X. All was great until I upgraded to the new version - nomachine 4. In this version I can not find that option. I have to run a full remote desktop session, which slows things down and is also much less convenient for my work. Was this option removed from the client? Or is it hiding somewhere in there and I just can't find it?

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• How can I make gitosis distinguish between two users with the same username

  - by bryan kennedy

  I have a gitosis system that seems to be working correctly except for a common problem we run into where I can't distingush permissions between two users who have the same username, but different hosts. For example: [email protected] 's SSH key is in the key folder. And so is [email protected] 's SSH is also in the key folder. These two jsmith's are two different people on two different computers. However, when I configure them in the gitosis.conf file with the usernames jsmith@computer or jsmith@machine, it seems like each user just gets the same permission. Can gitosis not distinguish the full username (name and host)? If not, how do I deal with multiple users accessing our system with common usernames? Thanks for any help.

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• Eclipse: would more CPU cores with HyperThreading help increase speed?

  - by Dylan

  I'm programming a very large project in Eclipse. Right now I use a dual core machine with 2GB RAM, but Eclipse is sometimes busy for minutes (refreshing/indexing/building), so I'm upgrading to a new machine (with 16GB RAM and an SSD). Now I must choose between an Intel 2500K or an Intel 2600K that has HyperThreading. The price difference is about $100. Would that be worth it, for Eclipse, or is more memory/faster drive much more important for Eclipse ? Can Eclipse make use of the HyperThreading at all?

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• Actually utilizing relational databases for entity systems

  - by Marc Müller

  Recently I was researching several entity systems and obviously I came across T=Machine's fantastic articles on the subject. In Part 5 of the series the author uses a relational schema to explain how an entity system is built and works. Since reading this, I have been wondering whether or not actually using a compact SQL library would be fast enough for real-time usage in video games. Performance seems to be the main issue with a full blown SQL database for management of all entities and components. However, as mentioned in T=Machine's post, basically all access to data inside the SQLDB is done sequentlially by each system over each component. Additionally, using a library like SQLite, one could easily improve performance by storing the entity data exclusively in RAM to increase access speeds. Disregarding possible performance issues, using a SQL database, in my opinion, would allow for a very intuitive implementation of entity systems and bring a long certain other benefits like easy de/serialization of game states and consistency checks like the uniqueness of entity IDs. Edit for clarification: The main question was whether using a SQL database for the actual entity management (not just storing the game state on the disk) in a real-time game would still yield a framerate appropriate for a game or even if someone is aware of projects that demonstrate SQL in a video game.

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• Friday Tips #5

  - by Chris Kawalek

  Happy Friday, everyone! Following up on yesterday's post about Oracle VM VirtualBox being selected as the best virtualization solution for 2012 by the readers of Linux Journal, our Friday tip is about that very cool piece of software: Question: How do I move a VM from one machine to another with Oracle VM VirtualBox? Answer by Andy Hall, Product Management Director, Oracle Desktop Virtualization: There are a number of ways to do this, with pros and cons for each. The most reliable approach is to Export and Import virtual machines: From the VirtualBox manager, simply use the File…Export appliance menu and follow the wizard's lead. Move the resulting file(s) to the destination machine; and Import the VM into VirtualBox. This method will take longer and use more disk space than other methods because the configuration files and virtual hard drives are converted into an industry standard format (.ova or .ovf). But an advantage of this approach is that the creator of the virtual appliance can add a license which the importer will see and click-to-accept at import time. This is especially useful for ISVs looking to deliver pre-built, configured and tested appliances to their customers and prospects. Thanks Andy! Remember, if you have a question for us, use Twitter hashtag #AskOracleVirtualization. We'll see you next week! -Chris 

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• Recovering a Windows XP License key

  - by Fortyrunner

  I threw out a Windows XP machine a while ago (the motherboard failed). I kept the hard drive and the XP installation media. Problem is the license key was on a sticker on the machine - doh! The original manufacturer has gone bust (Evesham) and I suspect that Microsoft will be of little help. Is there any easy way to get the license key off the hard disk? Can I just find the file with the registry data in it and get the key using a hex editor? I really need a spare XP key for use in a Windows VM.

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• Application Launcher for Hyper-V Server

  - by peterchen

  We are currently in the process of setting up a HyperV R2 Server machine. Though there's not a lot we need to do wihtin the HyperV Server itself, the command line is sure minimalistic. There are a few administrative / Hardware Monitoring tools that we want to run on he machine itself (accessed through remote desktop). I am looking for a simple program/application launcher where we can hook up these maintenance tools (and one to open a new cmd.exe window in case I habitually close the one I'm working in!) However, all tools I tried by now more or less assume explorer is present, and fail in different ways. Before I go and write a simple one myself, any recommendations?

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• Speeding up remote X sessions

  - by Alexander Gladysh

  I have a remote machine running Ubuntu 11.10 Server, to which I connect via SSH from OS X 10.7.3: Host remote.example.com ForwardX11 yes ForwardX11Trusted yes Sometimes I want to launch a GUI application there (most notably, gitk). But UI is rather slow. Both remote machine and my own Mac have good internet connection. Ping between them is about 55ms, and there is no packet loss. Is there something I can do to speed things up? Setting up some other remote desktop solution is an option, but I'd like to avoid it since I don't need this application very often.

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• Port based bandwidth shaping

  - by nixnotwin

  I have an interent connection with the speed of 4000k bits up and down. I want to do port based traffic shaping on a ubuntu machine, which acts as router. eth0 is the WAN interface. This is how I would like to allocate bandwidth: For ports 80 and 445 the bandwidth usage can go upto 90% For ports above 1024 upto 65535 the bandwidth usage can go upto 10% For remaining ports the bandwidth usage can go upto 40% The easiest way for achieving the above is using a router with tomato firmware. I have used it and it is very efficient. I want to try if it can be done on a Ubuntu or any GNU/Linux machine. I have googled extensively about the topic and I feel there isn't much information.

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• remote desktop network failed connection

  - by tbischel

  I was trying to create a remote desktop connection from Windows XP to my Windows Vista Ultimate Addition machine at home. This normally works fine. Today after my connection was dropped, I tried to reconnect to my machine. It brings me to the normal startup screen, but when I tried to log in, it gave me the message "This network connection doesn't exist". This doesn't make much sense, as I have reached a Windows style login screen already. My connection returned later that day, but I'm curious as to what happened. Anyone see this before?

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• Debian on Hyper-V

  - by Tobia

  I installed Debian with kernel 2.6.32-5-686 on a Hyper-V virtual machine. I had to add a legacy network card. I follow this tutorial http://www.microsofttranslator.com/bv.aspx?ref=Internal&from=ru&to=en&a=http://blogs.technet.com/b/abeshkov/archive/2011/03/17/hyperv_5f00_debian.aspx to add Hyper-V driver but when I reboot with the new kernel it crash during bootup. Is there any other way to load hyper-v drivers? I really need to change that legacy network card because my debian machine is going to be used as proxy. Thank you.

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• How to upgrade a 1.4.3 TortoiseSVN-created repository to 1.6.x?

  - by SiegeX

  A few years ago, TortoiseSVN 1.4.3 was deployed to our software development team and we are now looking at upgrading the client to the latest 1.6.x version. I had hoped this upgrade would be transparent with the additional features and modifications being client-side. For the most part, this was true except for a very important feature -- merging. When I try to merge a feature branch back into truck I get a show-stopping "Merge tracking not supported error." Here are some facts worth noting: When the repo was first created (before I was on board), it was created via the TortoiseSVN client itself. We do not have a 'svn server daemon' per se, rather the repository folders/database resides on a share folder that is accessible from our workstation machines via file:///. This was actually an eye opener for me, I had always thought there was some SVN server daemon we were talking to. We do not have any access to the underlying machine hosting the SVN share other than the ability to read/write to the share itself. I don't even know what OS the machine is running on. This share server was chosen because its drives are backed up nightly by our IT group. In all honesty, we really don't need the merge tracking feature although it would be nice to have. For the time being it would be sufficient to be able to use a 1.6.x TortoiseSVN client on the 1.4.3 repository and have it merge (sans tracking) without error. So now the question becomes, how does one upgrade a client-created 1.4.3 repo to a 1.6.x compatible version without access to the underlying machine the repo resides on? I was hoping the TortoiseSVN client itself had the ability to do this but that does not appear to be the case. Will I be forced to copy the entire repo over to my local drive, run some svn commands to upgrade the repo locally then copy the repo back to the share point? If so, will doing this break any compatibility with the the 1.4.3 clients in case we cant upgrade them all at the same time? Thanks for the help.

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• RDA and Fusion Middleware Diagnostic Framework Integration

  - by Daniel Mortimer

  Further to my last blog entry "FMw Diagnostic Framework : Automatic Capture of Diagnostic Data Upon First Failure!" I have spent some time exploring how Remote Diagnostic Agent (RDA) integrates with Diagnostic Framework. Remote Diagnostic Agent, by default, collects the information about the last 10 incidents which have been captured in the Automatic Diagnostic Repository (ADR). This information can be located via RDA's Start Page Menu system. See screenshot below. Screenshot - Viewing Diagnostic Framework Incident Information in a RDA Package Note: In the next release of RDA - version 4.30 - the Diagnostic Repository menu label will have it's own position in the weblogic managed server sub menu hierarchy rather than be a child menu item of the logs menuDiagnostic Framework is also capable of launching RDA engine and including the output in an incident package. This is achieved via the command "IPS GENERATE PACKAGE". The RDA output is written to DOMAIN_HOME/servers/<server name>/adr/diag/ofm/<domain name>/<server name>/incpkg/pkg_[number]/seq_[number]/rda The RDA collected files are best viewed (as shown in the screenshot above) by opening the RDA Start Page - "DFW__start.htm" - from this directory in a browser. If you do not have a browser available on the host machine, zip the contents of the rda directory and transfer and extract to a machine which has a browser.  The explanation of the integration goes a little deeper. If you want to know more, read My Oracle Support document: Understanding RDA and FMW 11g Diagnostic Framework Integration [Document 1503644.1]

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• Cannot ping any computers on LAN

  - by Timothy

  I havem't been able to find a straight forward answer on this yet. I'm hoping people here are able to help! Keep in mind that I'm a complete beginner at this - this is the first installation i've done for any LINUX systems ever so please keep that in mind when answering this question. We are a complete Windows shop, using nothing but Microsoft products but looking into the value of OpenStalk however have been having problems getting Ubuntu Server installed and speaking to the network. The machine is getting an IP address which is telling me that some sort of DHCP activity is working but I'm not able to ping any computer on our network as well as not able to connect to the internet. Every time I try to ping i'm getting; Destination Host Unreachable I've tried using modifying the resolv.conf file with our static details to match my Windows 7 machine still with no luck. Even tried disabling the firewall on Ubuntu Server 11 and no luck. Any ideas? Please let me know if there is any information you need from the server and I'll post up.

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• How to upgrade a 1.4.3 TortoiseSVN-created repository to 1.6.x?

  - by SiegeX

  A few years ago, TortoiseSVN 1.4.3 was deployed to our software development team and we are now looking at upgrading the client to the latest 1.6.x version. I had hoped this upgrade would be transparent with the additional features and modifications being client-side. For the most part, this was true except for a very important feature -- merging. When I try to merge a feature branch back into truck I get a show-stopping "Merge tracking not supported error." Here are some facts worth noting: When the repo was first created (before I was on board), it was created via the TortoiseSVN client itself. We do not have a 'svn server daemon' per se, rather the repository folders/database resides on a share folder that is accessible from our workstation machines via file:///. This was actually an eye opener for me, I had always thought there was some SVN server daemon we were talking to. We do not have any access to the underlying machine hosting the SVN share other than the ability to read/write to the share itself. I don't even know what OS the machine is running on. This share server was chosen because its drives are backed up nightly by our IT group. In all honesty, we really don't need the merge tracking feature although it would be nice to have. For the time being it would be sufficient to be able to use a 1.6.x TortoiseSVN client on the 1.4.3 repository and have it merge (sans tracking) without error. So now the question becomes, how does one upgrade a client-created 1.4.3 repo to a 1.6.x compatible version without access to the underlying machine the repo resides on? I was hoping the TortoiseSVN client itself had the ability to do this but that does not appear to be the case. Will I be forced to copy the entire repo over to my local drive, run some svn commands to upgrade the repo locally then copy the repo back to the share point? If so, will doing this break any compatibility with the the 1.4.3 clients in case we cant upgrade them all at the same time? Thanks for the help.

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• Cross-forest GPO between 2003 and 2008 Denied Beacuse it's "Inaccessible"

  - by j.rightly

  I have a two-way, non-transitive trust between two forests and domains, "W2003" and "W2008". In W2008 I have a GPO with user settings linked to a machine OU containing machine "Server". The GPO applies to Authenticated Users. Cross-forest loopback processing is enabled in merge mode. When I log onto Server as User (whose account exists in the W2003 domain), the GPO does not apply. I run RSoP and see that the GPO is "Denied" for the reason "Inaccessible." The GPO name is not listed, but the GUID is. I have checked the file-level permissions on the DC to ensure that User has access to read the GPO's folder and all its contents. What is going on?

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