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• Mac OS X multi-user thin client server (terminal server)?

  - by username

  Is there any solution out there to turn a Mac into a true multi-user thin client server? I'd like to set up a few cheap PCs with access to a couple accounts using something like VNC, but it isn't economical to buy a new server for each user or a new license for virtualized OS X Server for each user. I'm fully aware that OS X Server lets you set up users with "network home folders," and I know there's also VNC built into Mac OS X. Neither of these fit the bill (the former requires a thick client, and the latter is single-user only) UPDATE: yay, Lion! http://www.9to5mac.com/54102/10-7-lion-allows-multi-user-remote-computing

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• VGA passthrough and desktop virtualization

  - by Zacariaz

  In short, my dream is to have one machine with multiple paravirtualized desktop and server guests, one of which has to be a Windows desktop with powerful graphics. As Windows can't be paravirtualized in the normal sense of the word, I was quite happy when I heard about VGA passthrough, but then I read on. As I understand it, such a setup would mean that the Graphics will be dedicated to one particular guest, thus you wouldn't be able to switch between guests. If this is in fact so, would someone please explain to me what the purpose/use of VGA passthrough is? I can think of no real use for it. Yes it's a cool technology, but to me it seems pointless. It's true that it's possible to passthrough individual VMs to separate GPUs, which is also cool, but in the end I should think that two seperate computers would make life a whole lot simpler. Again it seems rather pointless.

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• Why are Full GCs not running on my gcInterval I set?

  - by Brad Wood

  ColdFusion 10 Update 10 Windows Server 2008 R2 Java 1.7.0_21 I am trying to figure Full GCs to run every 10 minutes. I have used the gcInterval JVM arg in the past on earlier versions of ColdFusion with success, but I have confirmed with verbose GC logs that Full GCs are still happening on the hour (Unless the Old Gen gets so full that it forces a full collection). Here are the full JVM args from ColdFusion10\cfusion\bin\jvm.config (line breaks added for readability) Is there something else I need to be doing to get this working on ColdFusion 10? java.args= -server -Xms4072m -Xmx4072m -XX:PermSize=512m -XX:MaxPermSize=512m -Dsun.rmi.dgc.client.gcInterval=600000 -Dsun.rmi.dgc.server.gcInterval=600000 -XX:+UseParallelGC -XX:+UseParallelOldGC -Xloggc:gc.log -verbose:gc -XX:+PrintGCDetails -XX:+PrintGCDateStamps -XX:+PrintGCTimeStamps -XX:+UseGCLogFileRotation -XX:NumberOfGCLogFiles=5 -XX:GCLogFileSize=1024K -Xbatch -Dcoldfusion.home={application.home} -Dcoldfusion.rootDir={application.home} -Dcoldfusion.libPath={application.home}/lib -Dorg.apache.coyote.USE_CUSTOM_STATUS_MSG_IN_HEADER=true -Dcoldfusion.jsafe.defaultalgo=FIPS186Random -Dcoldfusion.classPath={application.home}/lib/updates,{application.home}/lib,{application.home}/lib/axis2,{application.home}/gateway/lib/,{application.home}/wwwroot/WEB-INF/flex/jars,{application.home}/wwwroot/WEB-INF/cfform/jars

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• What command line tools for monitoring host network activity on linux do you use?

  - by user27388

  What command line tools are good for reliably monitoring network activity? I have used ifconfig, but an office colleague said that its statistics are not always reliable. Is that true? I have recently used ethtool, but is it reliable? What about just looking at /proc/net 'files'? Is that any better? EDIT I'm interested in packets Tx/Rx, bytes Tx/Rx, but most importantly drops or errors and why the drop/error might have occurred.

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• Use test to check for condition with find and execdir option

  - by slosd

  I think I can keep my question short. Why does the following command produce no output? find /usr/share/themes -mindepth 1 -maxdepth 1 -type d -execdir test -d {}/gnome-shell \; I expected it to print all folders in /usr/share/themes that contain a folder gnome-shell. Several websites suggest that this usage of test as a command in exec/execdir is possible. From man find: -exec command ; Execute command; true if 0 status is returned. [...]

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• How long is the Windows 8 activation period if I do not connect to the internet?

  - by Moab

  This is not a duplicate of this question, since the OP had already connected to the internet. I installed Windows 8 Consumer Retail and was not connected to the internet, and remain unconnected so it cannot automatically activate. How long can I use Windows 8 this way (never connected to the internet) and without activating the license? I want documentation links, not just an answer you think is true or read somewhere, back up any statements with clear documentation please. Answers related to Vista-W7 activation or commands used in Vista-W7 to check license status are not acceptable as Microsoft completely changed activation technologies for windows 8.

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• Twisted pair cable twists and unwanted signals issue

  - by ziaharipur

  I am confused about one point I have read the following paragraph from the networking book. “the twists in the twisted pair cable are used to avoid the unwanted signals. For example one twist, one wire is closer to the noise source and the other is farther; in the next twist the reverse is true. Twisting makes its probable that both wires are equally affected by the unwanted signal. This means that the receiver which calculate the difference between the two receives no unwanted signal.” Now ok I understood the purpose of twists but I am confused about how receiver will calculate the difference when it will receive the signal?. How unwanted signal will be eliminated ? Another thing that I want to make clear is , I am beginner please provide such an answer that can be understood.

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• Copy data from Access to the next row in Excel

  - by edmon

  I have a MS Access database for a small Hotel. On the main form I have Guest Information fields...(Name, Address, Phone#, etc). I also have an Excel file that keeps track of bookings for the Hotel. The following code takes the Guest information from my form in Access and populates the labeled cells in my Excel file. Dim objXLApp As Object Dim objXLBook As Object Set objXLApp = CreateObject("Excel.Application") Set objXLBook = objXLApp.Workbooks.Open("Y:\123files\E\Hotel Reservation.xls") objXLApp.Application.Visible = True objXLBook.ActiveSheet.Range("B2") = Me.GuestFirstName & " " & GuestLastName objXLBook.ActiveSheet.Range("C2") = Me.PhoneNumber objXLBook.ActiveSheet.Range("D2") = Me.cboCheckInDate objXLBook.ActiveSheet.Range("E2") = Me.cboCheckOutDate objXLBook.ActiveSheet.Range("G2") = Me.RoomType objXLBook.ActiveSheet.Range("H2") = Me.RoomNumber End Sub Is there a way to, move to the next row in my Excel file, for a new guests info? EX. I take my first guests info and it populates row 2 of my Excel file. For my next guest it will populate row 3 of my Excel file and so on....

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• Programmatically closing a dialog box - win32 [migrated]

  - by user1697579

  I'm working on an application to detect a pop-up dialog and then automatically dismiss it. I'm writing this as a C++/Win32 app. The dialog box is generated by IE 7 and I can detect the window, but several methods to get the OK button to "click" have failed. Doing searches for other people's solutions, sending these messages to the button handle seems to have worked in a lot of situations: PostMessage( handle, WM_LBUTTONDOWN, 0, 0 ); PostMessage( handle, WM_LBUTTONUP, 0, 0 ); PostMessage( handle, BM_SETSTATE, 1, 0 ); It has no effect on the button state in my tests though. I can send tab characters to the main window and see that the OK button gets focus, but then sending return characters does nothing. To learn more about this I used Spy++ to get information about the window hierarchy and what messages are delievered when I manually click the OK button. Looking at the message log and reading about WM_MOUSEACTIVATE seamed to offer a solution. The log info shows that 0002166C was the button window. So in my code I tried this: GetClassNameA( handle, str, str_size ); if( strcmp( str, "Internet Explorer_Server" ) != 0 ) return TRUE; // Not the window we're interested in. // Send a message to activate the button window and have it process a mouse click. PostMessage( handle, WM_MOUSEACTIVATE, (WPARAM) dialog_handle, MAKELPARAM( HTCLIENT, WM_LBUTTONDOWN ); Based on the window hierarchy and message log, I think the window with the class name "Internet Explorer_Server" is the button. Maybe I'm wrong, because it does seem like an odd class name for a button... Below is a link to the window hierarchy image, message log when I manually click the OK button. Last is the code that's executed on a 1 second timer ticket, looking for the window. Any insight and help is appreciated! Image of the window hierarchy, source, window messages, and test dialog source are available here: https://sites.google.com/site/matthewmillersmiscellanea/Home/

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• Merge Two Folders To Act As One (Software Raid 0?)

  - by Dboy1612

  Using Windows 7, I'm trying to setup what I've come to call a "Software Raid of Folders", not completely sure it's the right term, but I'm sure anyone who knows the true term will understand what I'm getting at. I have two folders, on two seperate harddrive, I would like to "merge" these folders while keeping them on seperate harddrive so they act as one folder. Example: Music and Videos are to be merged together to a new folder called "Merged" Music runs off of Harddrive 1 Videos runs off of Harddrive 2 Anything new saved inside Merged is saved within Videos that runs off of Harddrive 2 Now you see how I came up with the term "Software Raid", it's like an average RAID 0 setup, but instead I want to do it with just two specific folders on two different drives within Windows. Any help on this is apprecieated!

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• Apache RewriteRule ignoring RewriteCond?

  - by winsmith

  So I have an Apache running on OSX Server 10.4 (don't ask) with multiple sites. In 0002_[example.com].conf, I have this bit of code: <Directory "/Library/WebServer/Documents/secret/"> RewriteEngine On RewriteCond %{REMOTE_ADDR} !^137\.250\. RewriteRule .* /messages/secret.html </Directory> However, in this configuration, the RewriteCond always seems to evaluate to false, since the secret directory gets shown even if the client's address does not begin with 137.250. If I change the config to this <Directory "/Library/WebServer/Documents/secret/"> RewriteEngine On RewriteRule .* /messages/secret.html RewriteCond %{REMOTE_ADDR} !^137\.250\. </Directory> the condition either does not get evaluated at all or always evaluates to true. Either way, all clients get blocked. What am I doing wrong?

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• Clarification of the difference between PCI memory addressing and I/O addressing?

  - by KevinM

  Could someone please clarify the difference between memory and I/O addresses on the PCI/PCIe bus? I understand that I/O addresses are 32-bit, limited to the range 0 to 4GB, and do not map onto system memory (RAM), and that memory addresses are either 32-bit or 64-bit. I get the impression that memory addressing must map onto available RAM, is this true? That if a PCI device wishes to transfer data to a memory address, that address must exist in actual system RAM (and is allocated during PCI configuration) and not virtual memory. So if a PCI device only needs to transfer a small amount of data at a time, where there is no advantage to putting it into RAM or using DMA, then I/O addressing is fine (e.g. a parallel port implemented on a PCI card). And why do I keep reading that PCI/PCIe I/O addressing is being deprecated in favour of memory addressing? Thanks!

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• How to deploy Windows-8 Enterprise Apps to other users?

  - by TToni

  Windows-8 (Metro) Apps can be installed using "sideloading", bypassing the Windows store in enterprise environments. In principle this is easy: Once you enabled sideloading (which is automatically done when a Win8-machine joins a domain), you can install a signed appx-Package through PowerShell with the "Add-AppxPackage" command. But there is a catch: The App is only installed for the user who executes the command and there is no "-Credentials" parameter! I can probably solve that problem in my specific scenario, where I deploy a self-developed app through TFS build to a virtual machine with a fixed demo user (by using remote powershell in combination with "Add-Job", which does take a credential parameter and because I know the given username and the password). But that is not true in an enterprise environment, where I want to distribute my App to thousands of users. Cracking all their passwords seems a bit over the top, so what would be the "correct" way to do this? I can't find any useful information from Microsoft about this, but maybe one of you already ran into this problem and solved it?

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• Tips for Making this Code Testable [migrated]

  - by Jesse Bunch

  So I'm writing an abstraction layer that wraps a telephony RESTful service for sending text messages and making phone calls. I should build this in such a way that the low-level provider, in this case Twilio, can be easily swapped without having to re-code the higher level interactions. I'm using a package that is pre-built for Twilio and so I'm thinking that I need to create a wrapper interface to standardize the interaction between the Twilio service package and my application. Let us pretend that I cannot modify this pre-built package. Here is what I have so far (in PHP): <?php namespace Telephony; class Provider_Twilio implements Provider_Interface { public function send_sms(Provider_Request_SMS $request) { if (!$request->is_valid()) throw new Provider_Exception_InvalidRequest(); $sms = \Twilio\Twilio::request('SmsMessage'); $response = $sms->create(array( 'To' => $request->to, 'From' => $request->from, 'Body' => $request->body )); if ($this->_did_request_fail($response)) { throw new Provider_Exception_RequestFailed($response->message); } $response = new Provider_Response_SMS(TRUE); return $response; } private function _did_request_fail($api_response) { return isset($api_response->status); } } So the idea is that I can write another file like this for any other telephony service provided that it implements Provider_Interface making them swappable. Here are my questions: First off, do you think this is a good design? How could it be improved? Second, I'm having a hard time testing this because I need to mock out the Twilio package so that I'm not actually depending on Twilio's API for my tests to pass or fail. Do you see any strategy for mocking this out? Thanks in advance for any advice!

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• Slow network file copy on Windows 7

  - by Jason V.

  I wrote a program that uses xcopy to transfer files (usually between 1KB and 2MB) over our intranet. Usually, I am copying files from my host machine (Windows 7 x64) to a VMWare virtual machine running Windows Server 2008 (the VM is running on my host machine, if that matters). On Windows XP, the file transfers usually only require a few seconds to complete. But on my Windows 7 machine, the transfer of the first file (1.5 MB) takes around 1.5 minutes to complete. This is true whether I use xcopy, robocopy, or programmatically using File.Copy(). I noticed that if I use File.Copy, the first transfer is very slow and subsequent transfers are much faster. Any clue how I can speed up the process? Is there a setting in Windows 7 (or server 2008) that I could try?

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• A GFX card with two DVI and one HDMI with audio?

  - by TomaszRykala

  I haven't upgraded my PC for a while nor kept up to date with pc hardware since 2007, but have recently come up with a requirement and I am wondering if I can solve it! Are there any graphics cards out there that have two DVIs and one HDMI output, with the HDMI supporting sound over it? Basically, I've got a two PC monitor setup, and both monitors are connected to the two DVI's of my GTX9800+. I want to upgrade my card to say, GTX 460, but can't find if there is such with two DVIs (for my monitors) and one HDMI with audio (for my TV). So I am wondering, if such solution possible at all? I noticed that there are some cards out there with two DVI's and one mini-HDMI, but they all say 'HDMI Output Yes x 1 (via DVI to HDMI adaptor x 1 )', which probably means that because of the DVI element, the audio won't work. Is this true? Such card is an exmaple: http://uk.asus.com/Graphics_Cards/NVIDIA_Series/ENGTX460_DirectCU2DI1GD5/#specifications Many thanks for your help!

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• Is it normal for the laptop charger to spark when plugging in?

  - by Cd-MaN

  All the laptop chargers I had until now sparked whever I plugged them in. This is true for my old charger (the bulkier / rounder Dell model) and the new charger (the flat Dell model) with two different Dell laptops, however until recently I didn't give it much thought. Then, in the last couple of months: I shorted out a conference room and melted the floor a little (the wire caught fire) The second charger (also a Dell original) died, taking the power strip with it I'm wondering: Is it normal for laptop chargers to spark when plugged in? Specifically new, original Dell chargers Is there a "correct" way to plug / unplug chargers? Do I need to first unplug it from the wall and then from the laptop / do I need to first plug it into the wall and then into the laptop? May the problem be caused by the fact that I leave sometimes the charger plugged into the wall without connecting the laptop for longer periods of time (up to a day)? PS. I'm talking about Europe, so 220V and this happens in many places (at home, at my parents, at work, in hotels I trave to, etc)

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• Why can a network address not be a valid host address?

  - by Goblinlord

  So... I have studied for CCNA and such and been working with IP networking at the least the past 8 years or so. I have always seen and been told that the network address for a subnet is not a valid host address. Now first I will start by saying I know this is true. My question is more... is there a technical reason it can not be used or was it just arbitrarily agreed upon when the specification was designed? I understand why a broadcast address can not be used (because it is ACTUALLY used). The thing is when I see a network address used it is normally only in routing which is specifically using NETWORK addresses. This being the case, (network addresses being used only when you are expecting a network address) is there some technical reason that they could not have the network address be an actual valid host address?

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• How and what should I be (unit) testing for in this method?

  - by user460667

  I am relatively new to unit testing and have a query about what/how I should be testing a certain method. For the following (psudo-c#) method I have created (not a real-life example) what would you test for? Initially, my thoughts would be to test the output with variations on the dictionary of form fields, e.g. valid, invalid, missing values. However I also wonder how you would test to make sure the object values have been changed to the correct value and that the correct email message was attempted to be sent (obviously both services could/would be mocked). I hope what I am asking makes sense, I appreciate this is a subjective question and the answers may be 'it depends' ;) public bool ProcessInput(Dictionary<string, string> formFields, ObjService objService, EmailService emailService) { try { // Get my object id int objId; if(!int.TryParse(formField["objId"], out objId) { return false; } // Update my object - would you validate the save against a DB or a mocked inmemory db? var myObj = objService.Find(objId); myObj.Name = formField["objName"]; objService.Save(myObj); // Send an email - how would you test to make sure content, recipient, etc was correct? emailService.SendEmail(formField("email"), "Hello World"); return true; } catch(Exception ex) { return false; } }

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• Redirect specific e-mail address sent to a user, to another user.

  - by Michael Pasqualone

  I need to redirect e-mail within our MTA when the two following criteria are both true: When an e-mail is: Sent from: [email protected] Addressesd to: [email protected] Result: redirect e-mail to [email protected]. I don't want to catch *@isp.com and redirect, and I don't want to redirect all e-mail addressed to [email protected] but only redirect when [email protected] sends [email protected] an e-mail. How do I achieve this within Postfix's configuration. And if it's not possible within Postfix, what may be the best solution?

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• PDF to Image Conversion in Java

  - by Geertjan

  In the past, I created a NetBeans plugin for loading images as slides into NetBeans IDE. That means you had to manually create an image from each slide first. So, this time, I took it a step further. You can choose a PDF file, which is then automatically converted to an image for each page, each of which is presented as a node that can be clicked to open the slide in the main window. As you can see, the remaining problem is font rendering. Currently I'm using PDFBox. Any alternatives that render font better? This is the createKeys method of the child factory, ideally it would be replaced by code from some other library that handles font rendering better: @Override protected boolean createKeys(List<ImageObject> list) { mylist = new ArrayList<ImageObject>(); try { if (file != null) { ProgressHandle handle = ProgressHandleFactory.createHandle( "Creating images from " + file.getPath()); handle.start(); PDDocument document = PDDocument.load(file); List<PDPage> pages = document.getDocumentCatalog().getAllPages(); for (int i = 0; i < pages.size(); i++) { PDPage pDPage = pages.get(i); mylist.add(new ImageObject(pDPage.convertToImage(), i)); } handle.finish(); } list.addAll(mylist); } catch (IOException ex) { Exceptions.printStackTrace(ex); } return true; } The import statements from PDFBox are as follows: import org.apache.pdfbox.pdmodel.PDDocument; import org.apache.pdfbox.pdmodel.PDPage;

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• Is the community MySQL safe for production use?

  - by n_kips

  Or Will I need to get the enterprise version? This is because I found this on MySQL's site: If you are running a MySQL production level system, we would like to direct your attention to the product description of MySQL Enterprise Edition at: http://mysql.com/products/enterprise/ When I check the features, it seems like the community edition does not support transactions, while the enterprise version does. If it is true that the community edition is not right for production, then it seems like posgresql may be my way out, for it supports transactions and it is fully opensource. Will the sql syntax need to change (much) if I have to change? Thank you.

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• Selectively Including files in C#.net web application [migrated]

  - by segnosaur

  I am attempting to modify an application with the following characteristics: Written in C#.net Using Visual Studio 2010 The application uses a Master sheet to maintain commonality The Master sheet has the following: <%@ Master Language="C#" AutoEventWireup="true" CodeFile="mysheet.master.cs" Inherits="master_mysheet" %> Now, currently, the master sheet has an include file that brings in a common footer: #include file="inc/my-footer.inc" Here's what I want to do: I would like to modify the master sheet to be able to read in a footer based on the value contained in a session variable... i.e. (not real code, but just something to give an idea of what I want) if session("x") = "a" then #include file="inc/my-footer1.inc" else #include file="inc/my-footer2.inc" My first instinct was to go with some vbscript: <script type="text/vbscript" language="vbscript"> document.write("vbscript example.") </script> However, it doesn't run the vbscript code automatically on page load. Does anyone know: - The syntax I need to actually get this to work? i.e. to get the vbscript to run automatically on page load, AND to do the page include? - Or, is there a better way to go about this? (perhaps by doing some coding in C#) Note: I am experienced in C#; however, I haven't done any vbscript since the days of ASP classic, so my knowledge there is out of date.

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• Can i use a Windows 2008 r2 Cluster for file redundancy

  - by JERiv

  I'm researching a sever clustering architecture as a redundancy and backup solution for a client, and something that isn't made clear is whether or not i can use server clustering to replace a file server with backup solution. Forgive my Elementary understanding of server clustering but supposing: 2 Sites (NJ, CA) Identical Servers at each site setup as a Remote Site Cluster nodes with Windows Enterprise server 2008 r2 Services: File, Terminal, AD, and maybe DNS Will the following will be true: Files (including data drives) will be synced between the two servers eliminating the need for third party backup/mirroring software to sync/backup files. Also supposing i use roaming profiles w/ folder redirection; How will client computer in the WAN access their data through the cluster (i.e. will they automatically choose the best route)

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• non-mapped virtual memory & total number of connections

  - by tszming

  We have two MongoDB data nodes (replica set) - Primary & Secondary. I noticed that the non-mapped virtual memory is relatively high and wondering if they are hurting our MongoDB performance (The server usually peaked at around 6-7K queries per sec). In MMS, it was stated: "The most common case of usage of a high amount of memory for non-mapped is that there are very many connections to the database." So we checked the memory usage with db.serverStatus().mem in our Secondary: { "bits" : 64, "resident" : 6846, "virtual" : 416797, "supported" : true, "mapped" : 205549, "mappedWithJournal" : 411098, "note" : "virtual minus mapped is large. could indicate a memory leak" } Note: We are using 2.0.4 and now the default stack size should be 1MB per connection. The current number of connections is around 1.1K, but the non-mapped virtual memory (virtual-mappedWithJournal) is around 5699 MB. The trend is quite stable so I can't say there is a leak here, but where is the memory gone? Any idea?

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