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• USB webcam just works once and next time I've to reboot

  - by user30262

  I'm using Ubuntu 9.10, and a usb webcam that is shown as 'Bus 001 Device 005: ID 0ac8:3450 Z-Star Microelectronics Corp.' by lsusb. The problem is that on connecting the cam, it just works with the first program I start (skype, tokbox, messenger), and if I disconnect it or switch to another program, it stops to work and I have to restart my computer to make it work again. Has anyone else noticed this behaviour? Is there some good solution to reset the camera without rebooting to make it work again?

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• Prevent specific applications from being run as administrator

  - by Unsigned

  Background Most installation toolkits have the ability to launch, automatically or otherwise, external programs after installation. This is often appears in the installer via such options as "Show readme", or "Start program". Issue The problem is, many of these installers are poorly coded, and do not drop permissions appropriately. For example, starting the application automatically, or opening the application's homepage in the browser, often results in launching the application or browser with the installer's Administrative privileges, or a "High" UAC integrity level! This has the potential to open up security breaches, by opening up the installed application, or a web page (and possibly browser add-ons), that are now running with elevated permissions. (This is the reason I strongly recommend never choosing auto-launch options when installing software.) Question The question is: Is there a way to prevent certain applications (such as a web browser) from ever being launched with Administrative privileges, i.e., an automatic drop-privilege?

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• How to secure a VM while allowing customer RDS (or equivalent) access to its desktop

  - by ChrisA

  We have a Windows Client/(SQL-)Server application which is normally installed at the customer's premises. We now need to provide a hosted solution, and browser-based isn't feasible in the short term. We're considering hosting the database ourselves, and also hosting the client in a VM. We can set all this up easily enough, so we need to: ensure that the customer can connect easily, and also ensure that we suitably restrict access to the VM (and its host, of course) We already access the host and guest machines across the internet via RDS, but we restrict access to it to only our own internal, very small, set of static IPs, and of course theres the 2 (or 3?)-user limit on RDS connections to a remote server. So I'd greatly appreciate ideas on how to manage: the security the multi-user aspect. We're hoping to be able to do this initially without a large investment in virtualisation infrastructure - it would be one customer only to start with, with perhaps two remote users. Thanks!

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• Amazon EC2 - Reserved Private Addresses

  - by reach4thelasers

  I've got a private DNS Server running on Amazon EC2. I don't need a public IP Address because its only used for private addressing web1.xxx.internal database1.xxx.internal Problem is I had to terminate the instance recently and start a new one. This meant that the private IP address of the DNS server changed and I had to log in to each of my other 15 server one-by-one and change the DNS address to point to the new DNS server. There must be a better way to do this, if so, what is it?

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• server down "without reason"

  - by Nick

  I have a Lenny dedicated server at Hivelocity. My server went down today. They doesn't know why. I don't know why. MTRG shows 7Mbps before went the server goes offline, ddos not probably. Hardware failure? maybe. but now is running ok. hacked? maybe. lastlog, md5sum, rkhunter, syslog and auth.log seems ok. my load is always between 0.02 and 0.3, the server runs a small website but with 2million pageviews/day and never failed before. Where can I find more information in my logs? where I start looking?

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• how to reduce size (disk space) of windows 8?

  - by humanityANDpeace

  This questions is about what things I can do to reduce the size that Windows 8 uses. Background For example: At present and with only one programm installed (MS Access 2007) I have a about 15GB of my harddisk space used. I have little space (its a 17 GB partition on a SSD disk). I would like solutions that are like: Remove files not really needed (drivers not actually needed in the system) Help files not really needed (documentation) pagefile.sys (assuming I would have 4GB ram and no real need for swaping) hiberfil.sys (used for hibernate and sleep... I need that. though I would regain about 4GB space) At best I would like to delete mostly files that I would most likely not need. Though I have no good idea where to start there. Since my setup (hardware will not change) I would be willing to delete all the drivers that windows 8 has for hardware I do not have.... The question is about ways to reduce the space that Windows 8 uses.

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• Is it possible to share Skype's profile across OSs?

  - by Mihail

  in my machine I have two Windows OSs plus a Linux based one and I have Skype in them all. I don't mind Linux because there software is already different, but I wanted to sync my profile between both Windows so that I have access to all the conversiations and settings independently of which I'm using. So I created a directory junction of %AppData%\Skype\username but when I change OS when I start Skype I get a message telling me that the password was wrong and I have to input it again. This works until I change to the other where I get the same message. Is it possible to share Skype's profile across OSs? If so, how?

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• Unmasking fake IP address

  - by Omousso

  I need to unmask I masked IP..that has hacked my account & a family members account(s)... Can anyone help me...I have know no Idea where to start and know nothing about even where to begin. PLEASE someone reply, this is not a random hacking but someone trying to cause my family trouble...at least my instinct says so. My family member and myself both believe we know who it is.. They have gotten into several of my accounts and I've been acting is I don't know...tracking ip's..but I feel like they are masked! Also, my family member changed there email/password numerous time and they still got in....how?? Any & all help is appreciated!!

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• What steps are required to get DB2 working again after renaming the Windows XP system it was running on?

  - by Suppressingfire

  I think this is a fairly well known problem, but I haven't found a really solid solution to add to my toolbox. Here's the sequence of steps that leads to the problem: Install Windows (e.g., XP), naming the system XXX Install DB2 and create some databases Rename the system from XXX to YYY (via the System control panel's Computer Name tab Reboot and find DB2 unable to start How can I get DB2 up and running again without having to reinstall it and without having to rename the system back to XXX? I did find a blog post that hints at some registry values to tweak, but I'm hoping the SF community can come up with a solution in which I can have more confidence.

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• Windows 7 Built-In VPN - How to access network shares, printers, etc.?

  - by mbrion

  After I have successfully connected to a Windows 7 box via the built-in VPN: how do I access shares, shared printers, network appliances, etc.? So, call me bad at googling, but: I can find dozens of articles on "How to Set up a VPN Connection" and "How to connect to a VPN" for Windows 7... but I can't find a single article on how to access resources after connecting. I have a home VPN set up in Windows 7; I was able to connect to it from my friend's Windows 7 machine last night. I expected to be able to UNC into my shares; I also expected to be able to go to "Start Computer" and Click "Network" on the left side, and then see all of the devices on my home network (while the VPN was connected). Am I missing something obvious? How do I make this happen?

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• Public key repository - does this exist?

  - by allegroconmolto

  This is one of those "Surely this already exists, and if not, I damn well better build it!" moments. Here's my problem: I run a devteam, of around 10 individuals. Each of us has our own private key(s). When I go set up a new server for us, I have to import all of their keys to it. And if we start working with a contractor, I have to get his or her key too, and then import it and place it in .ssh/authorized_keys on the server. Ideally I'd like to be able to do something along the lines of: import_key allegroconmolto And it would contact a public repository of public keys, see if there was a user named allegroconmolto, and if so, import their key and add it to my authorized_keys. Adding future users would then be as simple as running import_key for them. I could then scp the authorized_keys file to all my servers and be done! This seems so obvious that I feel like it surely must exist somewhere.

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• Disabling the shell of user "daemon" (/bin/false)

  - by BurninLeo

  on a Linux system there are lot's of users by default: daemon, bin, sys, games, etc. According to my /etc/passwd most of these users have a shell assigned (/bin/sh) which seems some kind of insecure to me. My naive thinking would say: Only give those users a shell that may login to the server. Is my thinking wrong? If not completely wrong: Can I disable the shell for "daemon" and "www-data" without having side effects (e.g. the system wont start or the Apache PHP cannot excute system calls)? Thanks for your hints!

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• Java and Sendmail HELO requires domain address

  - by ealgestorm

  I am trying to set up emailing from a java web application hosted on a linux server (Cent OS) in apache. Sendmail is working fine from the command line as root on localhost but when trying to send emails from the java web app (also on the same server from localhost) the following java exception is thrown. 501 5.0.0 HELO requires domain address EDIT: I have read that some people have found this is due to an incorrect hosts entry currently the hosts file contains 127.0.0.1 Centos-VPS localhost.localdomain localhost and i'm not sure what the Centos-VPS bit at the start is for but this is a clients hosted server so don't really want to break stuff EDIT see the RFC is helpful ... 501 Syntax error in parameters or arguments Now I know what the problem is! (note the sarcasm people.)

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• Moving to an SSD with Windows 7

  - by Nick Gerakines

  Disclaimer: I've been digging around for a few days and didn't get what I was looking for in terms of answers, so I'm asking here. I've recently purchased an 80g SSD drive to use as my boot up and OS parition. I've got a windows 7 desktop with two 1TB (raid0) disks currently and I'm not sure where to start in terms of copying / moving the OS. I suppose that doing a fresh install isn't out of the question, but I've got an upgrade disk from Vista that I'd have to deal with. Where do I begin?

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• Computer won't stay powered up

  - by Android

  I have just tried to turn my PC on this morning and it won't stay powered up. It will come on as normal for about 5 seconds, not quite long enough for the monitor to wake up. Then it will power off. After about 2 seconds it will start again, it will continue like this until I pull out the plug. Plugging it in again doesn't restart the cycle although pressing the power button does. I have tried to clear the cmos but beyond that I have no ideas. It was working perfectly when I put it in hibernate last night. NOTE: I am using a Dell Optiplex 755 UPDATE 1: I took out the motherboard battery and it almost came on then it displays the message Error loading Operating System UPDATE 2: After taking out the custom video card, it says "No hard drive present"

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• How do I stop my IIS App Pool making a request to wpad.mydomain.com?

  - by Programming Hero

  As part of some performance troubleshooting, I've monitored the slow startup of a "cold" App Pool (one without an active worker process) in IIS. When using a built-in account, the App Pool starts in sub-second time. When using a custom local account the App Pool takes 30+ seconds to start processing requests. The service appears to be making requests to wpad.mydomain.com, an address it does not have access to, which causes it to wait 30 seconds for a response before eventually timing out. As a workaround, I've added the hostname to the server's hosts file, to direct the traffic to the local machine, which returns much faster (1-2 seconds). What do I need to do to stop IIS making this request when this identity is used for the App Pool?

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• Storage sizing for virtual machines

  - by njo

  I am currently doing research to determine the consolidation ratio my company could expect should we start using a virtualization platform. I find myself continually running into a dead end when researching how to translate observed performance (weeks of perfmon data) to hdd array requirements for a virtualization server. I am familiar with the concept of IOPs, but they seem to be an overly simplistic measurement that fails to take into account cache, write combining, etc. Is there a seminal work on storage array performance analysis that I'm missing? This seems like an area where hearsay and 'black magic' have taken over for cold, hard fact.

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• How can I install Java SDK on Windows 7 without messing up the system?

  - by robert_d

  I've installed Java SE Development Kit 1.6.0_31 32bit on Windows 7 64bit system, but this installation messed up my system, e.g. when I start Google Chrome I get error Your preferences can not be read Visual Studio 2010 after launching shows error that The Application Data folder for Visual Studio could not be created The shortcut to the Downloads folder in Windows Explorer no longer works. BTW this is pretty clean install, on other occasions after Java installation I had problems like this http://forums.techguy.org/windows-vista/808717-solved-c-windows-system32-config.html Is there a way to install Java SDK without messing up Windows 7? Or maybe this mess can be cleaned up after installation of Java, but how?

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• Solutions for scheduling cronjob

  - by Shamsul

  I have setup a list of corn, Some of the corn script takes long time like 1-5 hours, and its increasing day by day. I do not want to run two corn script at the same time, its not for the dependency, bu its because my server memory is not that much so that it can not handle two big operation, so i need to find out a solution so that the scheduled scripts will not start until the other previous script no finished. i have 10-15 corn job in the list. and 5 of them i do not want to overlap. Anyone help me find out any solutions?

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• Moving a File While It's In Use -- How Does it work?

  - by Zaz

  I've noticed that on non-windows OS.... ie linux/mac i can do things like: - Send a zip to a friend over aim - Delete the file while it's in transfer And the transfer does not fail. Or, I can do operations like.. - start a movie - erase the file - the movie still plays to completion (read from disk, not just buffered in memory) Although the files are being "deleted", as i mentioned, they are actually being moved to a different location on the file system... ie a Trash directory or something. So it seems to me like the OS uses a pointer @ the file that is updated when it moves rather than accessing the files directly. Can anyone shed some light on how this AWESOME capability is actually implemented? I'm not even sure what to google to learn more about it. thank you.

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• Why is my PC boot time slow when USB HDD attached?

  - by John

  I have a USB Hard disk that I am using as a secondary drive just for extra storage. When this is attached and I start my PC the second screen says searching for mass storage dives for about 5 minutes before continuing on. The same happens when I have a USB pen disk attached upon boot. If I attach the device after the PC has loaded then it is very quick however plugging and unplugging is not ideal. Is there away to disable this in the BIOS as I cannot instantly see an option. On boot it informs me I have an American Trends AMIBIOS in the BIOS setup it states the version as v02.58 2006. This is running on a ASUS MV2 Motherboard.

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• Windows 2003 Server Suddenly Drops Connections to everything but PING and port 80 (webserver)

  - by Urda

  Hi, I'm running a Windows 2003 Dedicated server, and the box has been rock solid for more than 2 years now. Just recently, I have had an issue where after a certain ammount of time the server will just stop accepting connections on all ports except 80, and still responds to pings. If you surf to a static HTML page on the box, you can display it. If you pull up a PHP file that has an outside database connection, it fails. RDP refuses to connect, and LogMeIn reports that "The connection was reset" The only fix at this time is to have the provider physically reboot my box to correct the issue. The event log doesn't seem to be leaving helpful messages, and I am at a lost to what is causing this error since I have not installed any new software in months on it. Any tips or help would be appreciated to tracking down this issue. I don't mind updating the question as responses come in, I just do not know where to start troubleshooting because it seems random at this time.

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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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• Error code 0x80070035. The network path was not found

  - by user144606

  My system is connected with a local LAN connection with 30 PC's. I'm not able to access the shared drive in the network, but I'm able to ping the IP address in which the drive is present. I have checked to start all the services, which are to be started and i have check the TCP/UDP ports also, but even after that I'm not able to access the drive, the same error message is being displayed again and again. Please help me to rectify the problem. I'm trying to solve the problem for the last 1 week. I have tried various solutions which are present in various web site, but I'm not able to find a proper solution. So please help me.

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• How to connect to VPN using commands in Linux (Fedora 16)

  - by WarFox

  Usually, I use the network connections icon on the top bar to connect to VPN. The connection is configured properly and it connects well. Configuration screen shot is given below. As you can see I have selected the 'Connect automatically' option. But this option doesn't help in connecting to VPN automatically upon login. This is my university VPN and it uses 'Point-to-Point encryption (MPPE)' for authentication I need to connect to the VPN using command line, so that I can write a script and run it at start up, so the connection is automatically established every time I login. This will also help in connecting to VPN when I login from 'init 3' mode. I depend on this VPN connection for my internet access. Please help me with the required commands.

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