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• backup of KVM VM's running on Ubuntu 12.4.1 precise edition from a remote machine

  - by Dr. Death

  I am creating a library API which will take the backup of all the VM's running on KVM hypervisor. My VM's can be of any type. I am taking this backup from a remote machine and need to put the backup at remote server. I have KVM, Libvirt installed on my system. Some of my VM's are LVM based and some are normal VM's running on KVM. I research and found out an excellent perl script for taking the backup http://pof.eslack.org/2010/12/23/best-solution-to-fully-backup-kvm-virtual-machines/ but since I am developing this library in C++ I cannot use it however it has given me a good understanding of how it will work. One thing I didnot able to sort out is if my VM's are not created using virt-manager or are created using any other tool them virsh system list command does not give them in the list of running VM's however they are running perfectly on my KVM server. Is there a way to list these VM's in my system list anyhow? secondly, when I am taking backup from the remote machine I am getting out of my ssh mode as soon as my libvirt command finishes and for every command I need to ssh again, Is there a way that I do not need to ssh each and every time? I have already used the rsa key for ssh but when once my command finishes my control moves to the remote machine again and try to find out my source VM location in remote machine's local drives which in turn fails it. here is the main problem I am facing. also for the LVM based VM I am able to take the live backup but for non LVM based my machines are getting suspended and not been able to take the live backup. Since my library will work on the remote machine only I might not know the VM's configruation on the KVM server. so need to make it consistent for all the VM's. Please share any thing related to this issue so that I may be able to take the live backup of the non lvm vm's also. I'll update my working and any research findings time to time to all of you. Thanks in advance for your suggestions in these regards.

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• PsExec and Remote Environment Variables, Logging, Etc.

  - by alharaka

  When I run PsExec on a remote computer, I always fall short of what I want. What I would like ideally in most situations is a) a log on an admin server where each individual log has the name of each the remote computer it was generated from (e.g. COMPNAME1.log, COMPNAME2.log, etc.) or b) a log file on each remote computer with whatever name I specify. When I try scenario (a), I use the following command. %SystemDrive%\path\to\psexec.exe @listofcomputers.txt -u DOMAIN\username cmd /c echo TEST >> \\server.company.tld\share\%computername%.log Problem is that it never works. All the computers just write to the log where %computername% is just the computer I execute PsExec from in my office. What I want are unique logs for each computer specific in the listofcomputers.txt that will correctly use the hostname from the remote environment variable without issue. Is that even possible? It does not seem to work for me. I tried this, and the syntax is clearly wrong. %SystemDrive%\path\to\psexec.exe @listofcomputers.txt -u DOMAIN\username "cmd /c echo TEST >> \\server.company.tld\share\%computername%.log" PsExec just fails saying the system file cannot be found (read: syntax fail). As for scenario (b), it appears to be a variation of a similar problem. When I run a command like this, it does not work. %SystemDrive%\path\to\psexec.exe @listofcomputers.txt -u DOMAIN\username "cmd /c echo %computername% >> \\server.company.tld\share\aggregated.log" Is there something I do not understand about remote path and environment variables with PsExec on the cmd.exe console (I have not even tried the dreaded PowerShell yet). I know such things work in a batch file (cmd /c \\server.company.tld\share\runthis.bat), but is there a reason it will not work when executing commands as arguments? I always need this, and can never get it!

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• How does Windows Remote Desktop Connection Work?

  - by Devoted

  How does Windows Remote Desktop connection work? An IP address is used to connect to the computer but....how can that IP be accessed from anywhere? If, for example, the IP address is 128.10.10.10, there MUST be another 128.10.10.10 somewhere else in the world. How does Remote Desktop know which one to connect to? Thanks so much EDIT: Thank you! Answers cleared this up quite a bit. But if my remote desktop connection suddenly stopped working and I didn't change anything, how do I even start to diagnose what may be the problem? I can remote connect to it from a LAN computer though...

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• How to sync a folder on a remote computer to a server on a domain

  - by Pierre-Alain Vigeant

  We have a small remote office that often share data with us. I learned that the data is shared as a email attachment, but that obviously leads to versioning hell and overriding. I am looking for a way for then to synchronize a folder directly on our main office domain controller. I personally use LiveMesh, but I would like a tool that is synchronized to our server directly without a 3rd party hosting the data, since we already have an online backup service taking care of the offsite backup. What enterprise class tool would let us synchronize a folder from a remote computer that is out of our domain, into our the file server of our domain? The synchronization has to be two-way, e.g.: Someone from the remote office will create an invoice. Someone from our office will review it and make modification to it. The remote office need to see the change. Our server is on Windows 2003.

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• tmux and screen-256 TERM not supported on remote hosts

  - by Yoav Aner

  I have set up my tmux to use screen-256colors and it works great with vim. However, when I ssh to a remote host from within tmux, screen-256colors isn't recognized, so I'm getting errors like this: E558: Terminal entry not found in terminfo 'screen-256color' not known. Available builtin terminals are: builtin_ansi builtin_xterm builtin_iris-ansi builtin_dumb defaulting to 'ansi' Other than editing each remote .bashrc (similarly to this suggestion), is there any way to set the TERM correctly and automatically on the remote host?

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• How to set the time HylaFax waits for the remote device to pick up

  - by Flo

  I'm using HylaFax on one of my server to send facsimile to different devices which works pretty well except for one device. I'm not sure, but the problem might be, that the remote device takes to long to pick up and response to the call. I tested it by calling the fax number with my phone and it took 30 seconds till the remote side picked up. So is there a way to tell HylaFax how long it should wait for the remote device to answer?

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• Connect to remote MySQL using proxy

  - by hypeflow

  I'm trying to connect to a remote MySQL server (with TCP access limited to a specific IP) using port forwarding via SSH, but still haven't figured out how to do it. Here's what I intend to do: Local[A] ---> Proxy[B] ---> Remote MySQL[C] [A] Local machine with Windows [B] CentOS machine with IP 123.123.123.1 (with it's own MySQL running, btw) [C] Remote MySQL server with IP 123.123.123.1 authorized on port 3306 How to achieve this? Thanks in advance.

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• Update the remote of a git branch after name changing

  - by Dror

  Consider the following situation. A remote repository has two branches master and b1. In addition it has two clones repo1 and repo2 and both have b1 checked out. At some point, in repo1 the name of b1 was changed. As far as I can tell, the following is the right procedure to change the name of b1: $ git branch b1 b2 # changes the name of b1 to b2 $ git push remote :b1 # delete b1 remotely $ git push --set-upstream origin b2 # create b2 remotely and direct the local branch to track the remote 1 Now, afterwards, in repo2 I face a problem. git pull doesn't pull the changes from the branch (which is now called remotely b2). The error returned is: Your configuration specifies to merge with the ref 'b1' from the remote, but no such ref was fetched. What is the right way to do this? Both the renaming part and the updating in other clones?

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• Remote desktop fails with user denied until client reboot

  - by Andrew J. Brehm

  Sometimes (but often enough to anoy) Remote Desktop Connection cannot connect to a server (2008 R2 but maybe also 2003) and claims that "The connection was denied because the user account is not authorized for remote login." The user is always authorized for remote login and the connection works from other clients. (Although this is the very same message that appears when a user really isn't autorized for remote login.) The problem always goes away after a client restart. The client is always Windows 7 but I have no (other) reason to assume that it only affects Windows 7 clients. Any idea what causes this?

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• OOF (Out of Office) is not working for remote users (Outlook Anywhere)

  - by Doughecka

  I'm not sure how long this issue has been happening, but recently a few of the remote sales users were going to a sales meeting and wanted to set their Out of Office... however in Outlook 2010, they get this error message: "Your automatic reply settings cannot be displayed because the server is currently unavailable" When I run the Exchange Remote Connectivity Analyzer, Autodiscover completes fine, but the next step fails: Exception details: Message: The request failed. The remote server returned an error: (403) Forbidden. Type: Microsoft.Exchange.WebServices.Data.ServiceRequestException Stack trace: at Microsoft.Exchange.WebServices.Data.ServiceRequestBase.GetEwsHttpWebResponse(IEwsHttpWebRequest request) at Microsoft.Exchange.WebServices.Data.MultiResponseServiceRequest`1.Execute() at Microsoft.Exchange.WebServices.Data.ExchangeService.BindToFolder[TFolder](FolderId folderId, PropertySet propertySet) at Microsoft.Exchange.Tools.ExRca.Tests.EnsureEmptyFolderTest.PerformTestReally() Exception details: Message: The remote server returned an error: (403) Forbidden. Type: System.Net.WebException Stack trace: at System.Net.HttpWebRequest.GetResponse() at Microsoft.Exchange.WebServices.Data.EwsHttpWebRequest.Microsoft.Exchange.WebServices.Data.IEwsHttpWebRequest.GetResponse() at Microsoft.Exchange.WebServices.Data.ServiceRequestBase.GetEwsHttpWebResponse(IEwsHttpWebRequest request) I've done some research, but I have yet to find a working fix for this... it seems like some permissions are messed up in IIS, but I haven't figured out what.

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• Using gnome-boxes with Remote Desktop Connection

  - by lviggiani

  in the past I used to connect to my windows server from ubuntu with remmina (through rdp protocol). I've recently installed ubuntu gnome remix (12.10.1) and gnome-boxes and I'm wondering if I can do the same with gnome-boxes. I've tried creating a new item in gnome-boxes and entering as url "rdp://x.x.x.x" as I used to do in remmina bit it says that the rdp protocol is not supported. Unfortunatelly I cannot find any manual or documentation listing the supported protocol or giving instruction on how to connect to a remote desktop. Can someone help me please?

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• JQuery validation without requiring MS scripts in asp.net mvc2 project

  - by Jim Geurts

  Is it possible to use the new client side validation features of asp.net MVC 2 without having to use the MS scripts (MicrosoftAjax.js, MicrosoftMvcAjax.js, MicrosoftMvcValidation.js)? I use JQuery throughout my application; JQuery has a great plugin for validation and I don't really want to force my users to load MS scripts just for validation. Is this possible? If so, any suggestions for how to accomplish it are appreciated.

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• How to specify a remote private queue in NServiceBus?

  - by Benny

  I tried to modify the sample PubSub from NServiceBus, which says in order to configure remote endpoints use the format: "queue@machine" and I didn't see the message arrive on the publishing machine, the following is the config of subscriber <UnicastBusConfig> <MessageEndpointMappings> <add Messages="MyMessages" Endpoint="MyPublisherInputQueue@Dell755" /> </MessageEndpointMappings> </UnicastBusConfig>

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• Sharp architecture; Accessing Validation Results

  - by nabeelfarid

  I am exploring Sharp Architecture and I would like to know how to access the validation results after calling Entity.IsValid(). I have two scenarios e.g. 1) If the entity.IsValid() return false, I would like to add the errors to ModelState.AddModelError() collection in my controller. E.g. in the Northwind sample we have an EmployeesController.Create() action when we do employee.IsValid(), how can I get access to the errors? public ActionResult Create(Employee employee) { if (ViewData.ModelState.IsValid && employee.IsValid()) { employeeRepository.SaveOrUpdate(employee); } // .... } [I already know that when an Action method is called, modelbinder enforces validation rules(nhibernate validator attributes) as it parses incoming values and tries to assign them to the model object and if it can't parse the incoming values  then it register those as errors in modelstate for each model object property. But what if i have some custom validation. Thats why we do ModelState.IsValid first.] 2) In my test methods I would like to test the nhibernate validation rules as well. I can do entity.IsValid() but that only returns true/ false. I would like to Assert against the actual error not just true/ false. In my previous projects, I normally use a wrapper Service Layer for Repositories, and instead of calling Repositories method directly from controller, controllers call service layer methods which in turn call repository methods. In my Service Layer all my custom validation rules resides and Service Layer methods throws a custom exception with a NameValueCollection of errors which I can easily add to ModelState in my controller. This way I can also easily implement sophisticated business rules in my service layer as well. I kow sharp architecture also provides a Service Layer project. But what I am interested in and my next question is: How I can use NHibernate Vaidators to implement sophisticated custom business rules (not just null,empty, range etc.) and make Entity.IsValid() to verify those rules too ?

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• Validation for SharePoint 2010 external lists / external content types

  - by mattblodgett

  Where does one put validation for external content types? Let's say one field on my ECT represents an email address that must be unique in our system. Where would I put the validation that checks to see that someone hasn't submitted an instance of the ECT with a duplicate email address? How do I bubble up validation errors so they're displayed in the SharePoint UI?

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• How do I encapsulate form/post/validation[/redirect] in ViewUserControl in ASP.Net MVC 2

  - by paul

  What I am trying to achieve: encapsulate a Login (or any) Form to be reused across site post to self when Login/validation fails, show original page with Validation Summary (some might argue to just post to Login Page and show Validation Summary there; if what I'm trying to achieve isn't possible, I will just go that route) when Login succeeds, redirect to /App/Home/Index also, want to: stick to PRG principles avoid ajax keep Login Form (UserController.Login()) as encapsulated as possible; avoid having to implement HomeController.Login() since the Login Form might appear elsewhere All but the redirect works. My approach thus far has been: Home/Index includes Login Form: <%Html.RenderAction("Login","User");%> User/Login ViewUserControl<UserLoginViewModel> includes: <%=Html.ValidationSummary("") % using(Html.BeginForm()){} includes hidden form field "userlogin"="1" public class UserController : BaseController { ... [AcceptPostWhenFieldExists(FieldName = "userlogin")] public ActionResult Login(UserLoginViewModel model, FormCollection form){ if (ModelState.IsValid) { if(checkUserCredentials()) { setUserCredentials() return this.RedirectToAction<Areas.App.Controllers.HomeController>(x = x.Index()); } else { return View(); } } ... } Works great when: ModelState or User Credentials fail -- return View() does yield to Home/Index and displays appropriate validation summary. (I have a Register Form on the same page, using the same structure. Each form's validation summary only shows when that form is submitted.) Fails when: ModelState and User Credentials valid -- RedirectToAction<>() gives following error: "Child actions are not allowed to perform redirect actions." It seems like in the Classic ASP days, this would've been solved with Response.Buffer=True. Is there an equivalent setting or workaround now? Btw, running: ASP.Net 4, MVC 2, VS 2010, Dev/Debugging Web Server I hope all of that makes sense. So, what are my options? Or where am I going wrong in my approach? tia!

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• Spring <jee:remote-slsb> and JBoss AS7 - No EJB receiver available for handling

  - by Lech Glowiak

  I have got @Remote EJB on JBoss AS 7, available by name java:global/RandomEjb/DefaultRemoteRandom!pl.lechglowiak.ejbTest.RemoteRandom. Standalone client is Spring application that uses <jee:remote-slsb> bean. When trying to use that bean I get java.lang.IllegalStateException: EJBCLIENT000025: No EJB receiver available for handling [appName:, moduleName:RandomEjb, distinctName:] combination for invocation context org.jboss.ejb.client.EJBClientInvocationContext@1a89031. Here is relevant part of applicationContext.xml: <jee:remote-slsb id="remoteRandom" jndi-name="RandomEjb/DefaultRemoteRandom!pl.lechglowiak.ejbTest.RemoteRandom" business-interface="pl.lechglowiak.ejbTest.RemoteRandom" <jee:environment> java.naming.factory.initial=org.jboss.naming.remote.client.InitialContextFactory java.naming.provider.url=remote://localhost:4447 jboss.naming.client.ejb.context=true java.naming.security.principal=testuser java.naming.security.credentials=testpassword </jee:environment> </jee:remote-slsb> <bean id="remoteClient" class="pl.lechglowiak.RemoteClient"> <property name="remote" ref="remoteRandom" /> </bean> RemoteClient.java public class RemoteClient { private RemoteRandom random; public void setRemote(RemoteRandom random){ this.random = random; } public Integer callRandom(){ try { return random.getRandom(100); } catch (Exception e) { e.printStackTrace(); return null; } } } My jboss client jar: org.jboss.as jboss-as-ejb-client-bom 7.1.2.Final pom pl.lechglowiak.ejbTest.RemoteRandom is available for client application classpath. jndi.properties contains exact properties as in <jee:environment> of <jee:remote-slsb>. Such code runs without exception: Context ctx2 = new InitialContext(); RemoteRandom rr = (RemoteRandom) ctx2.lookup("RandomEjb/DefaultRemoteRandom!pl.lechglowiak.ejbTest.RemoteRandom"); System.out.println(rr.getRandom(10000)); But this: ApplicationContext ctx = new ClassPathXmlApplicationContext("applicationContext.xml"); RemoteClient client = ctx.getBean("remoteClient", RemoteClient.class); System.out.println(client.callRandom()); ends with exception: java.lang.IllegalStateException: EJBCLIENT000025: No EJB receiver available for handling [appName:, moduleName:RandomEjb, distinctName:] combination for invocation context org.jboss.ejb.client.EJBClientInvocationContext@1a89031. jboss.naming.client.ejb.context=true is set. Do you have any idea what am I setting wrong in <jee:remote-slsb>?

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• Spring ROO Serverside validation doesn't work

  - by Hussain

  I have created a User domain with not null fields. If i remove following javascript validation on submit. Spring.addDecoration(new Spring.ValidateAllDecoration({elementId:'proceed', event:'onclick'})); Server side validation for notNull attribute doesn't work. On save user is created without validation error. Am I missing something over here ??

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• Tutoriel Java : Comprendre le fonctionnement de RMI (Remote Method Invocation), par Alain Defrance

  Bonjour, Le RMI (ou Remote Method Invocation) est très souvent utilisé, soit directement, soit dans des couches sous-jacentes. RMI est par exemple utilisé pour exposer des EJB SessionBeans. Notre objectif va être de démystifier RMI en comprenant ses méchanismes. Nous allons analyser comment une invocation à distance est possible en allant jusqu'a implémenter notre propre version allégée de RMI. Bien entendu, afin de nous focaliser sur les objectifs de cet article, certains prérequis sont nécessaires. Aucun rappel sur l'utilisation la gestion d'un réseau en Java ne sera fait. Article disponible ici : http://alain-defrance.developpez.com...2SE/micro-rmi/...

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• Lynx "Alert!: Unable to connect to remote host."

  - by Deepend

  I'm pretty new to Ubuntu server. I'm running Distributor ID: Ubuntu Description: Ubuntu 12.04.4 LTS Release: 12.04 I have installed Lynx via sudo apt-get install lynx everything installed fine but when I try to connect to a website it just seems to time out. When I run lynx google.com it goes to a blank screen with a blue line at the bottom. There is yellow text on the line which says "Making HTTP connection to google.com" but it just sits there. Eventually after 5 - 6 minutes it just goes back to the normal terminal window If I run the below on its own lynx I get the same blue line with the same text "Making HTTP connection to google.com" but after 30 seconds or so it briefly turns to a red line with "alert!: lynx unable to connect to remote host" written on it. I have installed lynx locally and it works fine. Does anyone have any ideas?

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• jQuery validation plugin dependencies

  - by Idsa

  Does jQuery validation plugin have some dependencies? For example, I saw blogposts that said delegate plugin should be used... but I don't see this plugin reference at any validation plugin example (for example, here: http://jquery.bassistance.de/validate/demo/milk/). The question arouse because validation plugin doesn't catch submit at my application.

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• Creating a remote management interface

  - by Johnny Mopp

  I'm looking for info on creating a remote management interface for our software. This is not anything illicit. Our software is for live TV production and once they go on-air we can't access the PC (usually through LogMeIn). I would like to be able to upload/download files and issue commands to our software. The commands would be software specific like "load this file" or "run this script" or "return this value" etc. A socket connection is preferred but the problem is most of our PCs are behind firewalls and NAT servers. I'm not sure where to start. I think HTTP tunneling is the way to go but am wondering if there are other options or recommendations. Also, assume our clients are not willing to open up ports for security reasons. Thanks.

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• KO 2.3.4 - Accessing validation array from callbacks in models

  - by kenny99

  Hi, Apologies if this is an oversight or sheer stupidity on my part but I can't quite figure out how to access the validation array from a callback in a model (using ORM and KO 2.3.4). I want to be able to add specific error messages to the validation array if a callback returns false. e.g This register method: public function register(array & $array, $save = FALSE) { // Initialise the validation library and setup some rules $array = Validation::factory($array) ->pre_filter('trim') ->add_rules('email', 'required', 'valid::email', array($this, 'email_available')) ->add_rules('confirm_email', 'matches[email]') ->add_rules('password', 'required', 'length[5,42]') ->add_rules('confirm_password', 'matches[password]'); return ORM::validate($array, $save); } Callback: public function email_available($value) { return ! (bool) $this->db ->where('email', $value) ->count_records($this->table_name); } I can obviously access the current model from the callback, but I was wondering what the best way to add custom error from the callback would be?

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• Can't connect to a remote server with Nautilus and a private key

  - by Desmond Hume

  The remote server requires a private key and passphrase for authentication. I tried putting username@server in the "Server" field and leaving "User name" and "Password" fields blank, putting the passphrase in the "Password" field, but it still says "Permission denied" and it doesn't ask for the private key at any point. I also tried ssh-add path/to/privatekey, but it says "Could not open a connection to your authentication agent.", however I'm not sure if ssh-add is even relevant. I can ssh into the server from the terminal just fine with the key/passphrase.

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• How to run red5 apps on a remote server?

  - by domi

  I've got a really nasty problem... I wrote a red5 app and so on and it is running perfectly on my local computer. Now the problem occurs = How can I make this program work on a remote server? Local : OSX 10.5 - red5 0.63 Server: CentOS 5 - red5 0.90 Maybe its because of the version difference... but I can't test red5 0.90 locally becaus it won't start up -.-' and I can't install the 0.63 on the server because of missing dependencies (and broken links to them...)

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