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  • OpenVSwitch and Virtualbox configuration

    - by Newbie
    I am trying to setup a lab network with OpenVSwitch (Virtual L3 Switch). I want to connect my 3 Virtualbox guest machines (running Debian 6) using OpenVSwitch. But, confused as what should I do first and how should I do this. I mean should I install OpenVSwitch on my VM or on my host machine? If I install on my host machine, then should I make to connect to my VMs. OR If I install OpenVSwitch on one of my VM, then how to connect the rest of the VMs to virtual switch. I know, there is option to connect internal networks in virtualbox, but I a want L3 switch to interconnect my VLANs. Can someone guide me here. Please & Thank you.

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  • Problem with Xen, xvda and sda

    - by Javier J. Salmeron Garcia
    I am creating a cloud for my university using Eucalyptus with Xen (PCs have Debian Squeeze 64 bit installed). I have a problem with the following guest configuration: # # Configuration file for the Xen instance evenmorefinalfoo, created # by xen-tools 4.2 on Thu May 26 11:03:06 2011. # # # Kernel + memory size # kernel = '/boot/vmlinuz-2.6.32-5-xen-amd64' ramdisk = '/boot/initrd.img-2.6.32-5-xen-amd64' vcpus = '1' memory = '128' # # Disk device(s). # root = '/dev/sda2 ro' disk = [ 'file:/home/xen/domains/evenmorefinalfoo/disk.img,sda2,w', 'file:/home/xen/domains/evenmorefinalfoo/swap.img,sda1,w', ] As you can see, the disk and swap images are meant to be mounted on sda1 and sda2. However, when I start the guest, these are mounted on xvda1 xvda2, provoking an error. Is there anything that I can do about that? It seems like it is a Xen error. Thank you in advance,

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  • multiple vlans routed on one nic? trunk?General? or Access?

    - by Aceth
    ok for the last week I've tried racking my head around this... I have a SRW208P with 802.1q support, and a virtual endian appliance. I would like to be able to have 3 vlans having everything routed through the endian appliance.. i.e. The Virtual server has 2 bridged NIC's to the switch. This is where I'm getting confused .. On the 8 port switch I've got the 3 vlans set up ok (all being untagged as they are not going to be vlan aware), it's the port I'm connecting the endian firewall to the switch I'm having trouble with (second nic goes to the adsl modem and NAT'd) Is it meant to be a trunk, "Genereal" or "Access" then untagged or tagged? the end goal is to have vlan traffic routing through the single NIC and have endian route vlan traffic according to the rules. Any one have any ideas on the cisco small business stuff? Thanks

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  • Installed over 4G RAM on 32-bit OS? [closed]

    - by kai
    Possible Duplicate: 32-bit Windows Server address > 4GB RAM - How? I know that for 32-bit OS, the addressable memory space for each process is "4G" (maybe just 3G in user space...). If I have a 8G RAM, is it correct that all of the processes can still utilize (shared) these 8G memory but each of them are limited to a maximum 4G? Or the whole system only can see and utilize 4G out of 8G and thus having 8G RAM on a 32-bit OS is the same as having 4G RAM on it?

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  • Virtualization of desktop

    - by Agares
    Hi! I'm thinking about virtualization of my laptop(for educational purposes). My idea is to install very light host OS and have all the rest as virtual machines. Microsoft's Hyper-V Standalone would be very good solution, but it's impossible to access virtual machine from computer, where the Hyper-V is the host(isn't it?). So, which virtualization software would be good for me? I wanna have virtualized Windows 7(and maybe some other windowses). My processor support Intel Virtualization Technology.

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  • Mavericks Dock Lag

    - by Syle
    Im having an weird bug on my MacBook Pro. When I start the machine, the dock have some graphic lag, the same when I open and close windows. The solution is simple, just open the AutoCAD and close it and the bug is gone. The same if I open AutoDesk Maya or other similar 3D program. My question where is not how to fix it, but why it happens. Its like Mavericks on the start thinks: Well you can only use a little memory of the graphic card! But if i open AutoCad, its like: Oh you are opening AutoCad so its better starting boosting the graphic card and giving you more memory. I bet there is something that is forcing Mavericks to think like this. Any help is welcome! =)

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  • redundant/multi-site terminal server

    - by Adam
    Hi We have a Hyper-V cluster running 5 virtual terminal servers using HA. We need to be able make this system redundant and so if this site was to fail our users could log into the backup system at another location and access their data via the terminal servers. Any ideas? We were thinking of maybe using a NAS which replicated the data to the other location in real-time(pass-through disks)? and having a similar Hyper-V cluster setup in the backup location. However we would need to create the users in both location and create a virtual mirror without the data ie applications, directories, settings etc. Is this the best way to achieve this? We have read that using Hyper-v pass through disks is a big performance de-grade.

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  • How to netboot ubuntu running iniside VirtualBox on Mac Air

    - by murungu
    Having configured a virtual machine for Ubuntu on VirtualBox on my mac air I need to install Ubuntu OS itself. I have selected the hardrive as the primary boot device and the network as the secondary boot device, so I am not prompted to install an Ubuntu disk at boot time. It attempts to netboot but is unable to locate Ubuntu and cannot find anywhere in the configuration where I can explicitly specify where to find and Ubuntu image, so assume it reverts to some default location and fails. Has anybody out there ever successfully installed ubuntu on virtual box on their Mac Air? What steos did you take to get it right?

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  • How the computer could be used by two users at the same time

    - by user59595
    Running windows 7 64, Is there any application that allows me to connect an additional keeyboard and mice and monitor, so that this can be used by other user at the samee time while I use the main computer, There is an application called cpnmouse but it doesnt work on win7, betwin crashes before win7 start up, teamplayer is too expensive Has anyone figured out this functionality maybe with virtual machinees or something, i've tried team player in a virtual machine but it crashes I have 3 monitors one of theem is a Tv, i would like that my girlfried uses it as a terminal without me loosing the focus cause she uses the mice There is a linux software called userful, but it's linux and doesnt work for me, and windows multipoint server needs a clean installation and also that's not a valid choice

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  • Help me to set samba and apache on my Ubuntu VM from Vista, starting from ping

    - by avastreg
    Ok the title is not so clear after all, so let's start with the problem description posting some points: i'm on Win Vista i have a Virtual Box Ubuntu 9.04 server (Virtual Machine) installed in windows i'm under Active Directory (maybe helps), with network 192.168.2.x After Ubuntu installation (LAMP), i have: Ubuntu Ip set to 10.0.2.15 (dhcp) Vista pings Ubuntu and Ubuntu pings Vista (only IPs, not names) Can't connect to Apache (default install ubuntu server) at the url h**p://10.0.2.15/ On Ubuntu, testing Apache by doing 'wget http://10.0.2.15/' works Tried to setup samba, writing a share def, but nothing, i can't access from Vista to Ubuntu My scope is: Setting up samba to work on files from windows Reaching apache to test web pages Ok i'm not completely noob (but i'm on the noob way anyway) and i've tried many solutions, so please try to help me; let's look together what went wrong :)

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  • Adding unallocated partition to Ubuntu in VMware

    - by AMS949
    I've installed Ubuntu 9.10 on a Windows XP using vmware. As most do, I initially setup the size of the virtual drive to 8GB and soon realized I need more. I used the VMware utility to expand the virtual drive and added another 4GB, which I can see using GParted. Now my dilemma is how can I "merge" the newly created space to my original? I need to add the unallocated space. I tried before and after formatting the new space but still whenever I try to resize/move /dev/sda1 it looks like it is using its maximum capacity. Also, GParted is being used from the GParted live CD not from the Linux live CD.

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  • Wiki on a pendrive - should work with any OS

    - by Florian Pilz
    Hello, I want to have an "extended memory" and want to accomplish that with an wiki on an pendrive. I already decided to use PmWiki, but if another wiki solves my problem that would be fine. The issue is: If I install an Apache on an pendrive, it depends on the running operating system. Because I'm using Windows & Linux (and will use Mac in the future) it is crucial for me to be platform independent. I read this article. DokuWiki is for Windows only and MoinMoin needs Python installed (which would be possible on my PCs, but not on public ones). Every help for my "extended memory" is appreciated. PS: As a last resort I could host a wiki on my webpage, which would be accessible everywhere. But I just see a challenge in trying it on a pendrive.

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  • How do you apply development practices like version control, testing and continuous integration/deployment to system administration?

    - by arex1337
    Imagine you're going to manage a number of servers with a number of different services that's used by a number of people. Now say you want to reconfigure or replace some software on one of those servers. Obviously you don't want to work on servers that are in production. If this was a code change, as a developer, I would make the change on my local development machine, test it locally and commit the change to a version control system. The changes could then be deployed in a staging environment, tested further and finally deployed in a production environment. It would also be easy for me to roll back, if necessary. Generally, or specifically, how do you achieve this in system administration? (The first thing that comes to mind is to use virtual machines and put virtual machine images in version control, but I'm sure there is a lot of literature and clever solutions I'm not presently aware of.)

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  • Server 2012 intermittently fails to respond to pings from single host, even with firewall disabled, but responds to non-ICMP requests fine

    - by James Westbury
    This one is kind of weird. I've got the following machines involved: DC01 - 10.1.2.42, Server 2012, domain controller & DNS server, physical machine nagiosv - 10.1.2.35, CentOS 6.4, Nagios, virtual machine CB01 - 10.1.3.81, Ubuntu 12.04 LTS, couchbase server, virtual machine So, I noticed something was wrong while configuring this new Nagios VM. I started seeing DC01's state flapping. I logged into nagiosv when I saw this happening, and attempted to ping DC01, both by FQDN and its IP address. Neither worked. I tried pinging the machine from CB01, which is another VM on the same virtual switch/physical NIC as nagiosv, and that worked fine. Pings still failing from nagiosv at this time. DC01 is also an internal DNS server, so I ran dig google.com from nagiosv, and was able to run a query against DC01 just fine: ;; Query time: 1 msec ;; SERVER: 10.1.2.42#53(10.1.2.42) ;; WHEN: Fri Nov 1 07:53:51 2013 ;; MSG SIZE rcvd: 204 Pings still failing from nagiosv, though. I can ping from DC01 to nagiosv, and that works, and I can still ping from other VMs on the same physical NIC into DC01, and that works. I should mention at this point that I've disabled the firewall on DC01 for testing purposes, and it doesn't make a damned bit of difference. (Even with the firewall enabled, I have a blanket exception for ICMP from the local subnet, so it shouldn't make a difference, but I figured I should test it anyway.) I loaded up Wireshark on DC01 and pinged it from nagiosv again. What I see is a bunch of echo requests coming in and not a single reply going back out. Filtered results here, showing all ICMP traffic during a 15-second period. A few more bits of info: There are no IP conflicts on the network. MAC addresses on the incoming pings match the MAC on the VM. There are no duplicate MACs on the network, as far as I can see. I have absolutely no idea why DC01 is failing to respond, here. Any ideas?

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  • Windows Server 2008: Limit UDP/TCP packets per IP or ban

    - by WBAR
    How I can limit UDP/TCP packets per IP send to my host (or better PORT) per second or minute ? Would be nice to ban that IP for 12/24 hours or even for ever. I got Windows Server 2008 and I'm very poor in Windows administration but quite good in Linux. EDIT: By basic problem is that They sending a lot of rubbish UPD and TCP packets.. TCP packets without SYNCH, fragmented UDP packets so my servers stop responding.. So I need to cut off users (IPs) sending more than X packets per second. I need solution witch provides me, somehow, configurable: X packets of certain type (UDP, TCP or both - lets say parameter named Z ) are allowed to be received by IP on Y port, otherwise this packet should be DROPPED. My virtual hosts are hosted by VirtualBox and I'm able to forward all incoming packets certain type and certain port to the specific Virtual Host, but I need to DROP them before my VirtualBox receive them.

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  • What can cause peaks in pagetables in /proc/meminfo ?

    - by Fuzzy76
    I have a gameserver running Debian Lenny on a VPS host. Even when experiencing a fairly low load, the players start experiencing major lag (ping times rise from 50 ms to 150-500 ms) in bursts of 3 - 10 seconds. I have installed Munin server monitoring, but when looking at the graphs it looks like the server has plenty of CPU, RAM and bandwidth available. The only weird thing I noticed is some peaks in the memory graph attributed to "page_tables" which maps to PageTables in /proc/meminfo but I can't find any good information on what this might mean. Any ideas what might be causing this? If you need any more graps, just let me know. The interrupts/second count is at roughly 400-600 during this period (nearly all from eth0). The drop in committed was caused by me trying to lower the allocated memory for the server from 512MB to 256MB, but that didn't seem to help.

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  • server host name and server ip address redirect (Debian, Apache)

    - by Matthias Reisner
    I have the following folder structure on my apache! .../var/www/www.x.tt/htdocs .../var/www/www.y.tt/htdocs I have defined a virtual host for each. So if I type in www.x.tt in my browser I get to the www.x.tt site. And the same for www.y.tt. But now my question! If I type in the server address or the server host name I get to the ../var/www directory but I want that the user will be redirected to the www.x.tt site! Do I have to create a new virtual host for this problem or is it also possible only to add a .htaccess Rule?! Thanks!

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  • Mixed sessions with Classic ASP on IIS 7.5 and Windows 2008 R2 64 bit

    - by Marcin
    Recently had an issues with a server upgrade from IIS 6 on Windows 2003 to IIS 7.5 on Windows 2008 R2 64 bit. We have a number of websites running on Classic ASP. All the sites sit under a particular site, e.g. www.example.com/foo and www.example.com/foobar. On IIS 6 each site was set up as a virtual directory and things worked fine. Since moving to the new set up, a lot of websites seem to have mixed Sessions. To be clear, this is not a app pool recycling issue; rather the sessions are populated with information when the user hits the site and while browsing they get sessions from different sites. We've determined this based on - a few customers called up and reported having their shopping cart with items with names of items belonging to a different site - also our own testing showed that some queries being run would try to bring products in from a different site We've tried - disabling dynamic caching - converting each site to be a virtual application (if I understand correctly, the virtual directory/application concepts were changed/refined somewhat in IIS 7 although to be honest, I'm not clear what the difference is) - various application pool changes (using .NET 2 framework), classic and integrated modes, changing the Process model to NetworkIdentity), all to no avail. The only thing we haven't tried is changing it to run as a 32 bit application. We're not using http only cookies, so when I open up a browser and type document.cookie into the dev console in Firefox/Chrome/IE that there will be multiple ASPSESSIONID=... values whereas previously I believe there was only one. Finally, we use server side JScript for the classic ASP pages, not VBScript, so we have code similar to the below. //the user's login account as a jscript object Session("user") = { email : "[email protected]", id : 123 }; and if we execute a line of code like below: Response.Write( typeof(Session("user")) ); When things are running correctly, we get "object" - as expected. When the Session gets trashed, the output is "unknown" and we are also unable to access the fields within the JScript object (e.g. the .email or .id fields). Much appreciated if anyone can provide any pointers about how to resolve this, everything on google seems to point to different issues.

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  • Optimal Configuration for five 300 GB 15K SAS Drives

    - by Bob
    I recently acquired an HP Z800 workstation that has five 300 GB 15K SAS Drives. This system will be dedicated to running multiple virtual machines under VMware Workstation (Note: I'm not using ESXi because I do plan to use the system for other purposes.). For the host OS, I plan to install RHEL 5. My number one concern is guest performance. For example, should I create a RAID 10 array for the OS and virtual machine storage with four of the drives and reserve the 5th? Or, is there a solution that will provide better performance?

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  • Configuring ejabberd on ubuntu ami of amazon ec2

    - by andy
    This is my first experience with ejabberd. Spare me if I miss anything. I have installed ejabberd server on ubuntu 12.04 AMI on Amazon EC2. I have successfully installed the server, added the admin user and host in the config file and opened up reqd ports (5222, 5223, 5269, 5280). Now I tried to login the web admin interface using the admin user id and password. I could log in, BUT I could only see one section, Virtual Hosts. No Control Lists, Access rules, Nodes and Statistics Menu items on the left. Also, when I click Virtual Hosts Menu item, the page that comes up does not show anything. Here are the screenshots

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  • Problem connecting to MySQL with zend

    - by wheresrhys
    I've set up a virtual host on my local machine (windows xp with xampp installed), have installed zend there and am now trying to connect to the MySQLdatabase. I get the following error message: Message: SQLSTATE[HY000] [2003] Can't connect to MySQL server on ''myhost.com'' (10060) All the tips I've found via google haven't helped. I use kaspersky antivirus and have added port 3306 to the allowed list for MySQL and Apache. I've also pinged myhost.com:3306 and get a response (with ip address 67.63.50.51), though localhost:3306 and 127.0.0.1:3306 aren't found. I've checked that other apps can still access MySQL if the virtual host is pointed at them instead and my non zend apps do work. I guess I have to do something further to the port, or maybe force the app to use a different port, but am not sure how to do either. Any help appreciated.

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  • Duplicate xserver

    - by hariks0
    When I start my ubuntu pc, just before my login, I receive a message that says "An xserver is already started in display :0. Would you like to try starting xserver in another virtual workspace?". Now If I answer 'No' the message appears again and again. If I say 'Yes' It goes to gnome desktop in virtual desktop 9 [Ctrl+Alt+F9] It was previously available only in [Ctrl+Alt+F7] but now available in both F7 and F9. Now I assume that there are two instances of xserver both in [Ctrl+Alt+F7] and [Ctrl+Alt+F9]. I think by killing one instance of xserver manaually I can disable the message. How do I do this? Thanks in advance.

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  • Symantec CPS / Backup Exec 11D Service stuck in "Starting" Status

    - by user42289
    I have two Windows 2003 (one is SE, one is SBS) both SP2, both are Virtual Machines of Microsoft Virtual Server 2005 R2. All of a sudden about 2 weeks ago, the Symantec Backup Exec / CPS 11D stopped working on them. One is the Media server, one is our Exchange 2003 Server. There is another copy of CPS on our file server that the service is running fine on. However the one that is fine is not a VM. When I say stop working, the "backup exec continuous protection agent" service is stuck in "starting" status. On the non Exchange server I've tried uninstalling the last Windows Updates that were run some time around the time of failure. I've tried repairing the install of CPS. I've tried uninstalling it and reinstalling. Exact same problem in the end.

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  • Optimal Configuration for five 300 GB 15K SAS Drives

    - by Bob
    I recently acquired an HP Z800 workstation that has five 300 GB 15K SAS Drives. This system will be dedicated to running multiple virtual machines under VMware Workstation (Note: I'm not using ESXi because I do plan to use the system for other purposes.). For the host OS, I plan to install RHEL 5. My number one concern is guest performance. For example, should I create a RAID 10 array for the OS and virtual machine storage with four of the drives and reserve the 5th? Or, is there a solution that will provide better performance?

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  • How do I install and run Tomcat on port 80 as my only web server? (Rooted Ubuntu box)

    - by gav
    Hi All, tl;dr - I have a rooted linux box that I want to run tomcat on as a server (No Apache Web Server) how would you set this up avoiding common security pitfalls? I've written a Grails App that I want to run on a VPS I rent. The VPS has very little memory and I am using it for the sole purpose of running this application so I don't need the apache web server. This is my first venture into Server administration and I'm sure to fall into some well known traps. Should I use iptables to redirect requests from port 80 to 8080? Should I run tomcat as root or as it's own user? What configuration settings would be good for a low memory system expecting less than 10 concurrent users? Hopefully an easy one for you! Anyone who could link to a tutorial would be a personal hero destined for great things no doubt. Gav

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