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• VPS for Glassfish

  - by Harry Pham

  Our small startup company plan to deploy a web application on Glassfish, I and wonder if some of the experience user out there can answer me couple question. When I shopping for server, I usually look at RAM amount, as GF does required good amount of RAM to run, below are the two sites with significant price different for the same amount of RAM. I wonder why?? Godaddy: http://www.godaddy.com/hosting/virtual-dedicated-servers.aspx?ci=9013 Versus http://entic.net/Servers Does below plan from Godaddy consider good to run GF application. OS: Linux CentOS • RAM: 4 GB • Storage: 60 GB • Bandwidth: 2,000 GB/mo Our web application is a social network, expected to have 2000-4000 users to start with

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• Java application crashes my computer. How do I troubleshoot?

  - by Oded

  I am using NetBeans 4.1 for my university course (this is an older version, but is the required version for the course - I can't use a newer version). Whenever I use it for longer than several minutes, my computer crashes - it either reboots or I need to reset it. I have tried running with all startup items disabled (to rule out other applications interfering with the app), but it did no good. I have used Sysinternals procmon logging and the logs are corrupt - the only way I was able to get a good log was by enabling boot logging. However these are huge and I don't know what to look for. I am using Windows XP SP3, fully patched up and this is the only application that I have any kind of problem with. Can anyone suggest troubleshooting steps that will help me pinpoint the cause of these crashes and fix them?

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• PostgreSQL 9.1 on Ubuntu Lucid fails to start - how to debug?

  - by Tom Fakes

  I'm using Vagrant with Chef Solo to setup a Lucid 64 box. I'm using a Chef recipe to install PostgreSQL 9.1 from Martin Pitt's backports. The install goes ok until the point where the database is started with /etc/init.d/postgresql start There's a log pause and the command fails. If I run pg_ctl manually, the database starts! The entire contents of my postgresql-9.1-main log file is: 2012-05-07 11:01:18 PDT LOG: database system was shut down at 2012-05-07 11:01:16 PDT 2012-05-07 11:01:18 PDT LOG: database system is ready to accept connections 2012-05-07 11:01:18 PDT LOG: autovacuum launcher started 2012-05-07 11:01:18 PDT LOG: incomplete startup packet 2012-05-07 11:01:26 PDT LOG: received fast shutdown request 2012-05-07 11:01:26 PDT LOG: aborting any active transactions 2012-05-07 11:01:26 PDT LOG: autovacuum launcher shutting down 2012-05-07 11:01:26 PDT LOG: shutting down 2012-05-07 11:01:26 PDT LOG: database system is shut down I've tried to change the postgresql config file to get more info into the logfile, but that hasn't worked at all. How do I debug this to find out what is failing so I can fix it?

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• Second video card (PCI) under Windows 7

  - by dbkk101

  I'm trying to get an old PCI video card (Diamond Stealth 2500) along with a normal PCI-E video card. In BIOS, there is a setting to switch between PEG/PCI or PCI/PEG on startup (PEG is PCI-E Graphics). When I use PCI/PEG only the old PCI card works, when I use the other one, only the new PEG card works. In PEG/PCI mode, Windows 7 recognizes the card and shows it in Device Manager as Standard VGA adapter, but it shows a warning for the device ("This device cannot start. (Code 10)").

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• Create an AWS AMI for Ubuntu with GUI which automatically launches web browser

  - by Rory MacDonald

  I've got an ubuntu AMI setup with ubuntu desktop installed and Chrome installed and set to boot on load (via the startup programmes menu within the ubuntu desktop) I've created an image of this AMI, but any time I launch a new instance running this, the Ubuntu GUI doesn't seem to load, until I SSH into the machine, enable VNC and then connect via Chicken VNC to the machine. At that point, the desktop appears to load + starts the browser. I really need the machine to boot and the browser to load without having to VNC into the machine.. Any help would be appreciated.

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• GRUB Error after Deleting Linux Partition

  - by Nironan12

  I was dual-booting with Windows 7 and Windows Vista each taking up half of my hard drive. In Windows 7 I used Easeus Partition Manager to shrink my Windows 7 volume 8GB. On the unallocated space, I installed Linux Mint 8 RC1. After a little bit of playing around with it, I booted in Windows 7, used EPM again and deleted the 8GB Linux partition. I then extended Windows 7 on the 8GB. After restarting my computer, all I get is a black screen and this: GRUB loading. error: no such partition grub rescue> I do not have a Windows 7 disk nor does my computer come with Startup Repair. What do I do?

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• Daemons die with bus error when their binaries live on NFS

  - by mbac32768

  We have some daemons executing on a number of hosts. The daemon executable images are these very large binaries that are hosted on NFS. When the binaries are updated on the NFS server, the previously running daemons sometimes drop dead with a Bus error. I'm assuming what's happening is the NFS server is replacing the binaries in a way that's invisible to the VFS layer on the NFS clients so they end up loading pages from the updated binary, which of course leads to madness. We tried moving the new binaries into place instead of cp, but that doesn't seem to fix it. I'm considering simply mlock()'ing the binary in the daemon startup script, but surely there's magic NFS options or semantics that we should be abusing. Is there a better way to fix this?

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• Need to set mailx variable to specify the From address

  - by user256817

  Running Oracle Linux 5.8 (which is just re-branded RedHat EL 5.8) I must change the From address. But we have scripts that use mailx which cannot be re-written to use any extra flags, so I'd like to use internal variables instead, which I see on the linux.die.net manpage on mailx is an alternative to the -r flag: -r address Sets the From address. Overrides any from variable specified in environment or startup files. Tilde escapes are disabled. The -r address options are passed to the mail transfer agent unless SMTP is used. This option exists for compatibility only; it is recommended to set the from variable directly instead. (Source: http://linux.die.net/man/1/mailx) How can we use these mailx variables? I tried adding this to /root/.mailrc, no go: set [email protected] I also added that to /etc/mail.rc with no gold. So I am turning to you, SuperUsers...

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• Booting a Windows 7 installation on different hardware

  - by tomfanning

  I'm in a situation where I could do with very quickly migrating a Windows 7 (RTM x64) installation from one machine to another. What options are open to me in terms of getting W7 to boot after the drive is picked up and moved from one box to another? I thought it was supposed to be a little less sensitive to this kind of move than XP, but it doesn't work - it is stuck in a reboot loop and never reaches a GUI. Tried a few things so far, none of which have worked: Changed SATA mode in the BIOS of the target machine between ATA and AHCI run Windows 7 Startup Repair tried safe mode, no change (I will keep this list up to date as suggestions come in) UPDATE: I can confirm this reboot loop is due to STOP error 0x0000007B, and these codes follow: 0xFFFFF880009A98E8 0xFFFFFFFFC0000034 0x0000000000000000 0x0000000000000000 UPDATE: I didn't get anywhere on this and I ended up just rebuilding the machine. I think it should be theoretically possible, so I'm going to leave the question open in case someone comes along in future with an answer.

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• C# app running as either Windows Form or as Console Application

  - by Aeolien

  I am looking to have one of my Windows Forms applications be run programmatically—from the command line. In preparation, I have separated the logic in its own class from the Form. Now I am stuck trying to get the application to switch back and forth based on the presence of command line arguments. Here is the code for the main class: static class Program { /// <summary> /// The main entry point for the application. /// </summary> [STAThread] static void Main() { string[] args = Environment.GetCommandLineArgs(); if (args.Length > 1) // gets passed its path, by default { CommandLineWork(args); return; } Application.EnableVisualStyles(); Application.SetCompatibleTextRenderingDefault(false); Application.Run(new Form1()); } private static void CommandLineWork(string[] args) { Console.WriteLine("It works!"); Console.ReadLine(); } where Form1 is my form and the It works! string is just a placeholder for the actual logic. Right now, when running this from within Visual Studio (with command line arguments), the phrase It works! is printed to the Output. However, when running the /bin/Debug/Program.exe file (or /Release for that matter) the application crashes. Am I going about this the right way? Would it make more sense (i.e. take less developer time) to have my logic class be a DLL that gets loaded by two separate applications? Or is there something entirely different that I'm not aware of? Thanks in advance!

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• Sphinx - Python modules, classes and functions documentation

  - by user343934

  Hi everyone, I am trying to document my small project through sphinx which im recently trying to get familiar with. I read some tutorials and sphinx documentation but couldn't make it. Setup and configurations are ok! just have problems in using sphinx in a technical way. My table of content should look like this --- Overview .....Contents ----Configuration ....Contents ---- System Requirements .....Contents ---- How to use .....Contents ---- Modules ..... Index ......Display ----Help ......Content Moreover my focus is on Modules with docstrings. Details of Modules are Directory:- c:/wamp/www/project/ ----- Index.py >> Class HtmlTemplate: .... def header(): .... def body(): .... def form(): .... def header(): .... __init_main: ##inline function ----- display.py >> Class MainDisplay: .... def execute(): .... def display(): .... def tree(): .... __init_main: ##inline function My Documentation Directory:- c:/users/abc/Desktop/Documentation/doc/ --- _build --- _static --- _templates --- conf.py --- index.rst I have added Modules directory to the system environment and edited index.rst with following codes just to test Table of content. But i couldn't extract docstring directly Index.rst T-Alignment Documentation The documentation covers general overview of the application covering functionalities and requirements in details. To know how to use application its better to go through the documentation. .. _overview: Overview .. _System Requirement: System Requirement Seq-alignment tools can be used in varied systems base on whether all intermediary applications are available or not like in Windows, Mac, Linux and UNIX. But, it has been tested on the Windows working under a beta version. System Applications Server .. _Configuration:: Configuration Basic steps in configuration involves in following categories Environment variables Apache setting .. _Modules:: Modules How can i continue from here... Moreover, i am just a beginner to sphinx documentation tool I need your suggestions to brings my modules docstring to my documentation page Thanks

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• Why does my .NET 4 application know .NET 4 is not installed

  - by Tergiver

  I developed an application that targeted .NET 4 the other day and XCOPY-installed it to a Windows XP machine. I had told the owner of the machine that they would need to install .NET Framework 4 to run my app and he told me he did (not a reliable source). When I ran the application I was presented with a message box that said this app requires .NET Framework 4, would I like to install it? Clicking the Yes button took me to the Microsoft web site and a few clicks later .NET 4 was installed, and the application successfully launched. Now I normally don't develop applications that target the latest version of .NET, I always target the lowest version I can (what features do I really need?). So this was my first .NET 4 app (and I only targeted 4 because it used a library that did). In the past, XCOPY-installing .NET applications to a machine that didn't have the correct version of .NET installed resulted in the application simply crashing on startup with no useful information presented to the user. Was it built into my app because I targeted .NET X? Was it something already installed on the target machine? I love the feature, I just want to know precisely how to leverage it in the future.

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• How to disable selective keys on the keyboard?

  - by Vilx-

  I'd like to write an application which disables certain keys on the keyboard while it's working. More specifically I'm interested in keys that might make the application loose focus (like ALT+TAB, WinKey, Ctrl+Shift+Esc, etc.) The need for this is has to do with babies/animals bashing wildly at the keyboard. :) My first idea was to use SetWindowsHookEx, however I ran into a problem. Since I need a global hook, the procedure would have to reside in a .DLL which would get injected in all active applications. But a .DLL can be either 64-bit or 32-bit, not both. And on a 64-bit system there are both types of applications. I guess then that I must write two copies of the hook .DLL - one for 32-bit and the other for 64-bit. And then I'd also have to launch two copies of the application as well, because the application first has to load the DLL itself before it can pass it on to SetWindowsHookEx(). Sounds pretty clumsy and awkward. Is there perhaps a better way? Or maybe I've misunderstood something?

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• Aironet 1200's Auto-Channel Feature: When should it be used?

  - by Josh Brower

  In our building we have around 25 1200 series Aironets, with a bit of overlap in some areas. Up until this point, we have had them deployed in alternating 1/6/11 channels, but we are wondering if we would get better performance if we used the auto-channel select feature. In looking around, I have seen comments that this feature should not be used as the WAP does a channel scan only on the radio startup, but I have not found this in any Cisco docs. Anybody have anymore information, or real-world experience with this feature? Thanks! -Josh

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• Can't boot into Linux partition after installation

  - by Otto

  I just installed Ubuntu. I created a partition in MacOSx using Disk utility, then deleted the partition and installed Ubuntu on the free space created. After the installation, Ubuntu said it would reboot. I hang on shutdown (which is normal, as google told me), so I used the power button to turn the MacBook off. Now I want to boot into Ubuntu. Pressing option/alt on startup only shows me the MacOSx and Windows partition. Also, the Linux partition isn't showing up on my MacOSx desktop. And in Disk Utility, I can see 3 grayed out partitions: "disk0s4", "disk0s5" and "Linux Swap". What can I do to boot into Ubuntu without losing my other partitions? Thank you for your help.

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• View Body not showing in Spring 3.2

  - by Dennis Röttger

  I'm currently trying to get into Java Web Development in general in Spring more specifically. I've set up my project as follows - hello.jsp: <html> <head> <title>Spring 3.0 MVC Series: Hello World - ViralPatel.net</title> </head> <body> <p>ABC ${message}</p> </body> </html> HelloWorldController.java: package controllers; import org.springframework.stereotype.Controller; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.servlet.ModelAndView; @Controller public class HelloWorldController { @RequestMapping("/hello") public ModelAndView helloWorld() { String message = "Hello World, Spring 3.0!"; System.out.println(message); return new ModelAndView("hello", "message", message); } } web.xml: <?xml version="1.0" encoding="UTF-8"?> <web-app xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" version="2.5"> <display-name>Spring3MVC</display-name> <welcome-file-list> <welcome-file>index.jsp</welcome-file> </welcome-file-list> <servlet> <servlet-name>spring</servlet-name> <servlet-class> org.springframework.web.servlet.DispatcherServlet </servlet-class> <load-on-startup>1</load-on-startup> </servlet> <servlet-mapping> <servlet-name>spring</servlet-name> <url-pattern>*.html</url-pattern> </servlet-mapping> </web-app> spring-servlet.xml: <?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:p="http://www.springframework.org/schema/p" xmlns:context="http://www.springframework.org/schema/context" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd"> <context:component-scan base-package="controllers" /> <bean id="viewResolver" class="org.springframework.web.servlet.view.UrlBasedViewResolver"> <property name="viewClass" value="org.springframework.web.servlet.view.JstlView" /> <property name="prefix" value="/WEB-INF/jsp/" /> <property name="suffix" value=".jsp" /> </bean> </beans> I can start up the Server just fine and navigate to hello.html, which is resolved by the servlet to give me hello.jsp, the title of the .jsp shows (Spring 3.0 MVC Series: etc. etc.), alas, the body does not. Not the JSTL-Variable and not the "ABC" either. I've implemented jstl-1.2 in my lib-folder.

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• Open a new browser window from embeded Internet Explorer

  - by Buddy

  I am working on a Windows desktop app (C++) that has an embedded Internet Explorer page. I'm working on the html page that is displayed in the There is not a back button control, so one of the requests is that links clicked on in the page should open the link in a browser window. It can open the link in the users default browser or in IE. Is this possible? I realize that this is not possible because javascript is in a sandbox and cannot touch outside applications. I'm thinking there might be a way because it is using the IE. I have tried the two methods that have worked for me in the past. Using jquery, I've tried these two approaches, but neither work in the app. They both work fine in normal browsers. Using target="_blank" $( "a" ).attr( "target", "_blank" ); The other is using window.open: $( "a" ).click( function() { window.open( $( this ).attr( "href" ) ); } ); I'm afraid that writing windows desktop applications is outside my area of expertise, so I cannot give more information regarding that side of the issue.

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• Ubuntu 12.04 blank screen after login

  - by kgthenerd

  I just installed Ubuntu 12.04 LTS 64 bit on a machine, everything went well accordingly but after login it just gives me a blank screen. During startup after BIOS message it shows "Out of range" error and comes to login window after logon it's just a blank screen. even after somehow it comes to an empty desktop screen i dont see the Unity bar or anything like that (Can change wallpaper, and system setting though). And can't goto Console mode by pressing Ctrl+Alt+F1 - it returns "Out of range" error. System is new AMD Sempron with 2 Gigs of RAM has NVIDIA GeForce 6150SE-based graphic chipset. any ideas on this?

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• How to distribute the android reusable code in a package?

  - by Kaillash

  Hi, I have developed some reusable android component which is basically a class . This class has some resource dependencies e.g. some png drawables, some xml layouts etc. So this class referenced the auto-generated R file.I would like to distribute this code in a single package like jar file to other developers for use in their applications. I have read that the only possible solution is to distribute code together with all my resources, which others have to copy to their "res" folder (source). So I created a jar file having the class file (say MyClass which is in the package com.xyz.android.app) and resources and tried to use this in my new application. So I added the jar file to my new applications build path using add external jars option in eclipse and copied all the resources to my new application's res folder. (The activity class say MainActivity of my new application is in com.abc.myapplication package, just for the case if it may helpful) But when I run this new application there is java.lang.ClassCastException in the MyClass class. I tried to debug the application and then I found that in the MyClass class, there is "R cannot be resolved" problem. Then I changed MainActivity's package to com.xyz.android.app (which is not the way, other developers will be happy to do), But again the same problem. But When I just copy the source java file such that both MainActivity.java and MyClass.java are in com.xyz.android.app package then application runs fine. So if I need to distribute such that other users need not to bother these package naming things, how can I accomplish this? Please help !!

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• Multiple email accounts from the same server in Emacs Gnus

  - by docgnome

  I'm trying to set up Gnus to use both my gmail accounts but I can only ever get one at a time to show up in the list of folders. (setq gnus-select-method '(nnimap "[email protected]" (nnimap-address "secure.emailsrvr.com") (nnimap-server-port 993) (nnimap-stream ssl))) (setq gnus-secondary-select-methods '((nnimap "[email protected]" (nnimap-address "imap.gmail.com") (nnimap-server-port 993) (nnimap-stream ssl)) (nnimap "[email protected]" (nnimap-address "imap.gmail.com") (nnimap-server-port 993) (nnimap-stream ssl)))) That is the relevant portions of my .gnus file. It prompts me for three username passwords on startup. After I enter all three, I can access my work account and the gmail account that I enter the creds for second. This is really annoying! Any ideas?

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• SQLite for personal use

  - by ALife

  What are the applications for your personal use that needs a small database like SQLite? I am thinking of trying a few popular databases and SQLite is surely the first one I am planning to try since I know barely nothing about database except some simple programming years ago. I learned that SQLite is good for personal use. But embarrassingly I do not see any application except maybe managing my list of phone numbers/contact info, which has probably a few hundred items. What's your experience? FYI, I use EndNote for my reference and softcopy of books, and I feel iTunes' music/media management is ok since I am not a frequent user anyway. And others? I do lots of coding, but I just use some simple etags tools for that. And I pretty much use .txt file (sometimes in the asciidoc style) for my notes. I have quite a bunch of notes, but not that many either. So, really, what are your personal applications that need a small database instead of existing tools and plain text files?

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• How to make ssh-agent automatically add the key on demand?

  - by Vi.

  I want to run ssh-agent (with maximum lifetime option), but not add any keys at startup, but instead add them on demand. Like first time I login to some server it should ask for passphrase, next time (unless I waited for more than a hour) it should connect cleanly: ssh server1 Enter passphrase for key '/home/vi/.ssh/id_dsa': server1> ... ssh server2 server2> # no passphrase this time # wait for lifetime ssh server2 Enter passphrase for key '/home/vi/.ssh/id_dsa': I don't want to manually remember about running 'ssh-add' each time. (e.g. entered passphrase for just for ssh and "Oh, it hasn't remembered, need to retype"). How to configure ssh to automatically add key to ssh-agent if user provided the passphrase?

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• PHP DOMDocument getElementsByTagname??

  - by FFish

  This is driving me bonkers... I just want to add another img node. $xml = <<<XML <?xml version="1.0" encoding="UTF-8"?> <gallery> <album tnPath="tn/" lgPath="imm/" fsPath="iml/" > <img src="004.jpg" caption="4th caption" /> <img src="005.jpg" caption="5th caption" /> <img src="006.jpg" caption="6th caption" /> </album> </gallery> XML; $xmlDoc = new DOMDocument(); $xmlDoc->loadXML($xml); $album = $xmlDoc->getElementsByTagname('album')[0]; // Parse error: syntax error, unexpected '[' in /Applications/XAMPP/xamppfiles/htdocs/admin/tests/DOMDoc.php on line 17 $album = $xmlDoc->getElementsByTagname('album'); // Fatal error: Call to undefined method DOMNodeList::appendChild() in /Applications/XAMPP/xamppfiles/htdocs/admin/tests/DOMDoc.php on line 19 $newImg = $xmlDoc->createElement("img"); $album->appendChild($newImg); print $xmlDoc->saveXML(); Error:

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• What hardware makes a good MongoDB Server ? Where to get it ?

  - by João Pinto Jerónimo

  Suppose you're on dell.com right now and you're buying a server to run your MongoDB database for your small startup. You will have to handle literally tens of thousands of writes and reads per minute (but small objects). Would you go for 2 processors ? Invest more on RAM ? I've heard (correct me if I'm wrong) MongoDB handles the most it can on the RAM and then flushes everything to the disk, in that case I should invest on a CPU with a large L2 cache, probably 40GB of RAM and a solid state drive.. right ? Would I be better off with a high end (~$11,309, 2 expensive processors, 96GB of RAM) server or 2x(~$6,419, 2 expensive processors, 12GB of RAM) servers ? Is Dell ok or do you have better sugestions ? (I'm outside the US, on Portugal)

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• Mount CIFS share with autofs

  - by Phanto

  I have a system running RHEL 5.5, and I am trying to mount a Windows share on a server using autofs. (Due to the network not being ready upon startup, I do not want to utilize fstab.) I am able to mount the shares manually, but autofs is just not mounting them. Here are the files I am working with: At the end of /etc/auto.master, I have: ## Mount this test share: /test /etc/auto.test --timeout=60 In /etc/auto.test, I have: test -fstype=cifs,username=testuser,domain=domain.com,password=password ://server/test I then restart the autofs service. However, this does not work. ls-ing the directory does not return any results. I have followed all these guides on the web, and I either don't understand them, or they.just.don't.work. Thank You

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