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  • Implications of using many USB web cameras

    - by Martin
    I'm looking into connecting multiple low resolution USB webcams to a single computer. What implications might this have on performance? How does, for example, four 320x240 cameras fare against a single 640x480 camera? I'm not well versed in the architecture of the USB interface, what are the performance caveats? By performance I mean how would it affect the time to read the image data from multiple cameras compared to a single one.

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  • Advance DNS - Redirecting Emails to new webhost

    - by Martin
    I am not to sure if this question belongs here but I will surely find out soon enough. I have two web hosts (Not sure why it has been setup this way but it has). I do not want to use the original web host to handle the emails as the Data that we get from them is 500 mb which is already full with hosting the website. The second web host has an unlimited data plan and was created so we could use this host for the email accounts. Now the problem is I have reset the Advance DNS Zone records on both accounts and I am not sure what they were before. (Silly me should have taken a backup of how it was setup before hand I know) Emails were working before and going to the second hosts server now they are going to the first host but it has no email addresses setup for use so all emails are bouncing saying that the address does not exist. Host 1 IP: 192.185.96.110 Host 2 IP: 27.54.88.66 So far I have changed the Advanced DNS Zone record on Host 1 with the following: A Record: mail.australisinstitute.qld.edu.au - 27.54.88.66 I have not made any changes on Host 2 and both hosts have the default MX Records. If I need to provide any more information I can but I just hope someone can decipher what I have said haha. Cheers in advance!

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  • Setting up Apache and PHP on Mac OS X Snow Leopard

    - by Martin Bean
    I've recently purchased an Apple iMac. Unfortunately, enabling Apache and PHP has thrown up some problems. I enabled Mac's built-in Web Sharing through System Preferences, at which point I got an output and could add HTML files to my user directory. However, PHP files were being displayed rather than interpreted. I then discovered this is because PHP isn't enabled by default on Mac's Apache set-up. After a quick Google search, I came across this page: http://developer.apple.com/mac/articles/internet/phpeasyway.html I proceeded to the section, Enabling PHP in Apache, copying and pasting the following code snippet into a new Terminal window and hitting Return: set admin_email to (do shell script "defaults read AddressBookMe ExistingEmailAddress") user_www=$HOME/Sites filename=php-test user_index=${user_www}/${filename}.php user_db=${user_www}/${filename}-db.sqlite3 # NOTE: Having a writeable database in your home directory can be a security risk! conf=`apachectl -V | awk -F= '/SERVER_CONFIG/ {print \$2}'| sed 's/"//g'` conf_old=$conf.$$ conf_new=/tmp/php_conf.new touch $user_db chmod a+r $user_index chmod a+w $user_db chmod a+w $user_www echo "Enabling PHP in $conf ..." sed '/#LoadModule php5_module/s/#LoadModule/LoadModule/' $conf | sed "s^[email protected]^<b>\$admin_email</b>^" > $conf_new echo "(Re)Starting Apache ..." osascript <<EOF do shell script "/bin/mv -f $conf $conf_old; /bin/mv $conf_new $conf; /usr/sbin/apachectl restart" with administrator privileges EOF Unfortunately, this has completed thrown Apache and now nothing is being served; instead I'm receiving "Failed to open page" errors because it cannot connect to the server, despite Web Sharing still being active in System Preferences. So therefore I guess my question is this: how can I undo the changes made by the copy-and-pasting of the above code snippet? Admittedly, I don't understand what the above did; I just thought it looked like a Terminal command and tried it. I have no experience in setting up Apache on Mac OS X (and I've only installed XAMPP and WampServer on Windows). So any points on reversing the aforementioned, and then successfully enabling PHP would be great. EDIT: I've discovered, via Console, the following error message is being recorded when trying to browse to 127.0.0.1... (org.apache.httpd) Throttling respawn: Will start in 10 seconds no listening sockets available, shutting down Unable to open logs (org.apache.httpd[13453]) Exited with exit code: 1 Does this point any more to the issue? EDIT #2: I'm now getting this in Console... 15/02/2010 21:24:14 osascript[3597] Error loading /Library/ScriptingAdditions/Adobe Unit Types.osax/Contents/MacOS/Adobe Unit Types: dlopen(/Library/ScriptingAdditions/Adobe Unit Types.osax/Contents/MacOS/Adobe Unit Types, 262): no suitable image found. Did find: /Library/ScriptingAdditions/Adobe Unit Types.osax/Contents/MacOS/Adobe Unit Types: no matching architecture in universal wrapper

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  • Problem to connect to MySQL server (error #2002) in PHP

    - by Martin
    I installed ZWAMP 1.0.7 (on Windows 7), but I'm having a weird problem. I can't connect to my MySQL server from any PHP script. If I try to use MySQL command line everything works fine but PHPMyAdmin retruns error #2002. I'm not sure whether it's important or not but MySQL server is not able to create socket file. I don't know what's the problem but I think everything is configured in my.cnf properly. Do you have any ideas?

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  • Why does StackExchange store images in imgur rather than its own servers? [migrated]

    - by martin's
    I am trying to understand the technical (and business) logic behind taking such an approach. Certainly SE isn't short of server or bandwidth resources. I don't think imgur is a CDN, so that can't be the reason. On the one hand one is giving up local control (meaning your files, your hardware) of the content. On the other, you don't have to use your own bandwidth, storage and resources. Then again, you depend on someone else for the reliability and up-time of your service.

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  • Thunderbird confused about EPS attachments

    - by Martin
    Sometimes, when I receive (Thunderbird 2.0.0.23 on OS X 10.5) emails with an EPS attachement sent from Mail OS X 10.4, I cannot open the EPS file. Thunderbird shows me 1 file, that can't be opened with any software but text edit. But, if I forward the email to myself, the forwarded email then has 2 files of the same name. One of the 2 forwarded files can be opened as expected. What can be wrong here?

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  • Does using a single cable to connect two switches create a bottleneck?

    - by Nick
    I realise this may be a stupid question for some, but it's something I've always wondered about. Let's say we have two gigabit switches and all of the devices on the network are also gigabit. If 10 computers connected to switch A need to transfer large amounts of data to a server on Switch B (at the same time), is the maximum transfer speed of each connection limited by the bandwidth of the connection between the two switches? In other words, would each computer only be able to transfer at a speed of one gigabit divided by the 10 machines trying to use the "bridge" between switches? If so, are there any workarounds so that every device can use it's maximum speed from point to point?

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  • find command in Linux

    - by Martin
    My goal is to find all pdf files on a remote machine, so I resort to the useful command find. So I type find ~ *.pdf or find ~ "*.pdf" and I get nothing. I do the same on my machine and I get nothing. I do a regular search from the menu on my machine and I find quite a few pdf files. Would somebody please tell me what am I doing wrong?

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  • What can I do to speed up my HTC Hero?

    - by Nick Bolton
    When I first got my HTC Hero phone it was very fast. But after a couple of weeks it's become slow. Typically (on any device), I've noticed that this is caused by having too much running at once... Is there a way I can limit the number of applications that are open? I think there's a task manager application in the market, so I'll try this. Does anyone have any further suggestions?

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  • 'Multi' partition recipe from Ubuntu alternate install CD without preseed

    - by Nick Meyer
    The Ubuntu/Debian installer includes a built-in guided partitioning recipe, called 'multi', which creates separate /home, /usr, /var, and /tmp partitions. It can be selected by starting the installer with a preseed file. You can see it described in the Karmic install guide: # You can choose one of the three predefined partitioning recipes: # - atomic: all files in one partition # - home: separate /home partition # - multi: separate /home, /usr, /var, and /tmp partitions d-i partman-auto/choose_recipe select atomic Is there any way to use guided partitioning with this recipe from the Ubuntu alternate install CD without the need to create a preseed file?

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  • Forwarding email to mydomain.com

    - by Martin
    Newbie question: I've got the following set up, the server 2008, the iis and the smtp. I've my mydomain.com set up with DNS pointing to my public ip, www and smtp both. Now I'll be sending alot of emails from my web app to people and this works fine. What I also want is for people to be able to send us email. Please point me in the right direction. Primary objective: [email protected] -- [email protected] Secondary objective, for extra love: [email protected] -- [email protected] and [email protected] -- [email protected] Do I need a popserver? Any tutorials people can recommend? Addition: And the MX. I've also pointed the MX record to my ip.

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  • match and export subject line and from header with procmail

    - by Nick
    I would like to use procmail or a combination of procmail and formail to take an email message and match a specific keyword in the Subject: line/header, and if matched, export the contents of the Subject: line/header, and the contents of the From: line/header to a perl script. I have researched this, and have not been able to get this working all the way. I am new to procmail, and I assume I need to use a nesting block, but I am not sure how to get the data and then export it. I have been able to match the subject line and export it to a perl script where it is read via ARGV0, but get lost when trying to export and match multiple fields. I tried subscribing to the procmail listserv, but it appears to be broken. Can someone help me with this, please?

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  • How do I figure out what is changing the userWorkstations attribute in Active Directory?

    - by Martin
    I just took over the IT for a medium sized business with a three domain controllers (2003/2008 Standard) and whenever I create a new user, after some time the user account cannot log into most machines on the network. I have traced this back to the "Log On To..." area becoming populated with a small list of machines. Even when I set the option to all computers, this list comes back after some time. I started hunting for vbs and ps1 scripts with the word "workstations" in them on all domain controllers to see if there is some kind of script to blame, but I have thus far come up empty handed. Is there a known software suite that can cause this (Microsoft Forefront, etc)? How can I figure out what is causing this list to change?

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  • Skype companywide global contacts list

    - by Martin
    We are a medium sized company based across several sites and with a number of home workers. We have more or less settled on Skype as our defacto method of communication. At the moment the only pain is ensuring that everybody has all the other employees added to their contact list. Can be a real pain when a new employee starts and they have to send details to everyone else and vice versa. Is there a solution that allows us to manage a central contacts list that we can push out to new/existing users?

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  • Skype companywide global contacts list

    - by Martin
    We are a medium sized company based across several sites and with a number of home workers. We have more or less settled on Skype as our defacto method of communication. At the moment the only pain is ensuring that everybody has all the other employees added to their contact list. Can be a real pain when a new employee starts and they have to send details to everyone else and vice versa. Is there a solution that allows us to manage a central contacts list that we can push out to new/existing users?

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  • Migrate data from SQL Compact to SQL Server 2008

    - by Martin
    I need to do a one-time migration of data from SQL Server Compact Edition to SQL Server 2008 Express Edition. I'm looking for a tool to do this kind of migration. I've tried using Import and Export Data in SQL Server, but it doesn't let me import from SQL Server Compact Edition. Anyone knows of a easy way to do it?

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  • mini linux for browsing media playing

    - by Martin Beckett
    I'm looking for a small linux install (<100Mb) that can just run a browser and ideally a media player. It's to fit in a spare recovery partition on my laptop and be a quick boot for non-work stuff when I'm on the road. I have used Puppy-linux and DSL before but they have lots of stuff I don't need. Is there something like these that just concentrates on running a browser in the way xbmc does for videos? ps. The size requirement was to fit in the existing 100Mb win7 recovery partition, but that can be resized. The main idea was something that booted very quickly without the 10min wait while windows does all the corporate stuff and realizes it isn't on the LAN - and could be shutdown instantly.

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  • postfix says mail sent ok, message does not arrive in ISPs inbox? no reject in log?

    - by Nick
    When I send a test message from my mail server to my @bellsouth.net email, The postfix log shows it was sent OK, but the message never arrives in my bellsouth inbox. Shouldn't I get a failure notice or a bounce if At&T is blocking the messages? I'm trying to troubleshoot why some customers aren't getting emails, but if there's nothing in mail.log to say the message is rejected, how do I know which messages were delivered successfully? The log shows: Feb 27 09:02:36 MyHOSTNAME postfix/pickup[26175]: D53A72713E5: uid=0 from=<root> Feb 27 09:02:36 MyHOSTNAME postfix/cleanup[26487]: D53A72713E5: message-id=<[email protected]> Feb 27 09:02:36 MyHOSTNAME postfix/qmgr[5595]: D53A72713E5: from=<[email protected]>, size=878, nrcpt=1 (queue active) Feb 27 09:02:37 MyHOSTNAME postfix/smtp[26490]: D53A72713E5: to=<[email protected]>, relay=gateway-f1.isp.att.net[204.127.217.16]:25, delay=0.57, delays=0.11/0.03/0.23/0.19, dsn=2.0.0, status=sent (250 ok ; id=20120227140036M0700qer4ne) Feb 27 09:02:37 MyHOSTNAME postfix/qmgr[5595]: D53A72713E5: removed The AT&T server accepted the message, right? I happen to have an At&T/Bellsouth email, but I don't have an account with every ISP we send to. I need some way of knowing if a message is getting to its destination or not. Is there any setting in my main.cf file that would affect whether or not we get reject/bounce notices?

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  • Debugging IO limitation

    - by Martin F
    I have a Fedora box with some severe IO limitations which I have no idea how to debug. The server has a Areca Technology Corp. ARC-1130 12-Port PCI-X to SATA RAID Controller with 12 7200 RPM 1.5 TB disks and a Marvell Technology Group Ltd. 88E8050 PCI-E ASF Gigabit Ethernet Controller. uname -a output: 2.6.32.11-99.fc12.x86_64 #1 SMP Mon Apr 5 19:59:38 UTC 2010 x86_64 x86_64 x86_64 GNU/Linux The server is a file server running Nginx with the stub status module enabled, so I can see the current amount of connections. The problem present itself when I have a high number of simultaneous connections in a writing state. Usually around 350, at this very moment it's at 590 and the server is almost unusable and stuck at 230mbit/s. If I run stop and hit 1 to see CPU core usages I have all 4 cores with around 99% io wait, if I run iotop the nginx workers are the only processes producing any read load, currently at around 25MB/s. I have each of the workers bound to their own core. Initially I figured it was just the disks being bugged. But I've run fscheck and smartmontools checks and found no errors. I also ran an iozone test which you can see the result of here: http://www.pastie.org/951667.txt?key=fimcvljulnuqy2dcdxa Additionally, when the amount of connections are low I have no problem getting a good speed. If I wget over the local network it easily hits 60MB/sec. Right now I just tried putting a file in /dev/shm, then I symlinked a file from the public dir to it and used wget over the local network and only got 50KB/s. Also, if I try to cp /dev/shm/test /root/test it quickly copies around 740MB and then slows down HEAVILY. Again with iotop reporting 99% iowait. I'm not really sure how to go about figuring out what the problems are. It could be a natural disk limitation but then the file from /dev/shm ought to transfer so it seems there's a network limit, but that's fine when there's not many connections. Perhaps it's a TCP stack problem but I really have no idea how to check that. Any suggestions on how to proceed with debugging would be very welcome. If additional information is required then let me know and I'll try to get it. Thanks.

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  • Launching Installer Via Powershell and WinRM and Nothing Happens

    - by Nick DeMayo
    I'm currently working on a Powershell script to run some Microsoft Hotfix installers remotely on several Windows Server 2008 R2 servers that I manage. Basically, the script copies all the appropriate files up to the server, and then runs the installer via Invoke-Command, like so: function InstallCU { Write-Host "Installing June 2013 CU..." Invoke-Command -ComputerName $ServerName -ScriptBlock { Start-Process "c:\aaa\prjcusp2\ubersrvprj2010-kb2817530-fullfile-x64-glb.exe" -ArgumentList "/passive" } } If I run the "Start-Process" command locally on the server, the installer runs properly. However, when trying to run it remotely, nothing happens (actually, I can see the installer start up in Task Manager, but it closes a couple seconds later and doesn't run). I've attempted giving the Invoke-Command -Credentials, I've turned off UAC on the server, and I've ensured that my WinRM settings (running 'winrm quickconfig' and setting TrustedHosts to *) are correct. I've also tried having the Invoke-Command script run a local Powershell script to run the installer and changing the Argument from '/passive' to 'quiet' (in case it can't remotely launch something that has a UI), but again, no dice. Is there anything else I can try, or am I just not going to be able to do this?

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  • Can't connect to workgroup

    - by Bonyfus Martin
    I have two computers in my workgroup. My laptop has Windows 7 on it and desktop has Windows Server 2008 on it. I can ping and connect to the Windows Server 2008 from my laptop but I cannot ping or connect to my laptop from Windows Server 2008. Both computers are in the same workgroup, and their IP addresses use the same subnet mask. Does anyone know why I cannot connect to my laptop from the Windows Server 2008 machine?

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  • Looking for CPU/GPU Temperature Monitor with Live Logging

    - by Nick Gotch
    I'm looking for a CPU/GPU temperature monitor with live logging that's also free. This question recommended some good software but doesn't meet my needs. I tried HWMonitor and it works great except it doesn't have live logging. I need live logging because the system I'm using seems to overheat and shutdown (assuming it's related to overheating) and I'd like to catch the failing point.

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