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  • <VirtualHost fqdn.mydomain.com:80> not recommended?

    - by Alois Mahdal
    In Apache2 documentation thay say that in <VirtualHost *:80>, the * can be replaced by IP or FQDN, but the FQDN is not recommended. Addr can be: The IP address of the virtual host; A fully qualified domain name for the IP address of the virtual host (not recommended); But why is it not recommended? If I have www.mydomain.com and webmail.mydomain.com pointing to the same IP address, why shouldn't I use the names here?

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  • Multicore system. How are the cores "sorted"

    - by asdrubael
    If I have a system with let's say two Quadcore CPUs and HyperThreading enabled, how do I know how the phsyical and virtual cores are sorted? For example if I force a process to run on "CPU 0" how to know which Core this really is? I remember a complex drawing about this, but didn't find anything useful.

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  • Is there a unix command to output time elapsed during a command?

    - by Olivier Lacan
    I love using time to find out how long a command took to execute but when dealing with commands that execute sub-commands internally (and provide output that allows you to tell when each of those sub-commands start running) it would be really great to be able to tell after what number of seconds (or milliseconds) a specific sub-command started running. When I say sub-command, really the only way to distinguish these from the outside is anything printed to standard out. Really this seems like it should be an option to time.

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  • Symbol LL500 Scanner Interface Not Detected

    - by agentfll
    I have an old Symbol LL500 scanner interface box and a scanner to go with it. The box's original cable used one of the old microsoft mouse connectors, but I got a converter to USB. The problem is that when I connect it to my MacBook, the interface powers up and works, but the computer dosen't recognize it or even say that a device is connected. Is there any way to make it see that the interface is there or am I just screwed?

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  • question about IP address

    - by baddogai
    i know how IP basically works, and knows that an IP address composed of a network ID portion and a host ID portion, but when I type a IP address ,say "8.8.8.8" into the web browser, i DIDN'T supply any subnet mask information, so how does the browser know where the dividing line is between the network ID and host ID? since 8.8.8.8 may mean 8.8.8.8/8, 8.8.8.8/24 etc. In a nutshell, the IP address I supplied is ambiguous.

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  • wamp can't put offline!!

    - by user343570
    when i wana put it offline it say: "Could not execute menu item (internal error) [Exception] Could not perform service action: The service has not been started." all froums said to me:u must under Apache open the httpd.conf and change the lines #Listen 12.34.56.78:80 Listen 80 to #Listen 12.34.56.78:80 Listen 8080 save the file and you are done. but my httpd.conf is blank!!!i need it

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  • Xcode immediate autocompletion (not only to the next CamelCase)

    - by courteous
    How to make the autocompletion feature return the current suggestion (from "completion list") in full? That is, how not to jump only to the next CamelCase with TAB ... but instead have, say, CTRL + TAB choose the suggestion immediately/in full? Example Having CGPDFStringGetLength selected in the "completion list", one would have to press TAB four (4) times! first TAB get to CGPDF then to CGPDFString then to CGPDFStringGet then to CGPDFStringGetLength It would be nice to have CTRL + TAB (for example) make the above a one-step process.

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  • rdisk value in boot.ini maps to which disk?

    - by MA1
    Hi All Following are the contents of a sample boot.ini: [boot loader] timeout=30 default=multi(0)disk(0)rdisk(0)partition(1)\WINDOWS [operating systems] multi(0)disk(0)rdisk(0)partition(1)\WINDOWS="Microsoft Windows XP Professional" /NOEXECUTE=OPTIN /FASTDETECT multi(0)disk(0)rdisk(0)partition(2)\WINNT="Windows 2000 Professional" /fastdetect multi(0)disk(0)rdisk(1)partition(1)\WINDOWS="Microsoft Windows XP Home Edition" /NOEXECUTE=OPTIN /FASTDETECT rdisk value tells the physical disk number. so, if i have three hard disks say: /dev/sda /dev/sdb /dev/sdc than how to know which disk(/dev/sda or /dev/sdb or /dev/sdc) is rdisk(0) and which disk is rdisk(1) etc Regards,

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  • Want to know how a particular page can be searched by Google?

    - by Champ
    I want to know how or what are the keywords by which a page can be searches on Google. Is there any tool on web by which I can get keywords for the page I want to search. Eg. If we search test on Google we will find this . Now what do i have to search(keywords) to find a particular page lets say abc.com/test.php Is there any tool by which i can get those keywords? Sorry if I am not clear with the question?

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  • Notepad++ find string with a new-line and replace

    - by Giraldi Maggio
    [Notepad++ Question] How do I use find-and-replace to replace the attribute of a series of tags using expression? Case scenario: Let's say I have a couple of lines of something like this: <li><a title="Bla bla" href= "http://www.url.com/etc">Text</a></li> And I want to replace them with this: <li><a title="Bla bla" href="">Text</a></li> Note the new line and double tabs on the original.

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  • My way of Comparing CPUs

    - by abbasi
    There are many types of CPUs, like Pentiume, Atom, core 2 duo, core iX (X = 3,5, ....), But I always don't look at them this way! I always look at their speed which in GHZ unit and then compare them with each other. For example when some CPU is in type of 'X' with 2 GHZ of speed and another one is in type of 'Y' with 2.2 GHZ of speed, I say the second one ('Y') has better speed and also better performance. Is it a correct way? Thanks

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  • Outlook 2003: How to display my own messages in conversation view?

    - by Godsmith
    When I select View-Arrange By-Conversation in Outlook 2003, the messages I sent myself are not shown in the message threads (unlike the conversation view in say, Gmail). To show my own messages I have to go to the Sent Items folder, if not someone has replied to one of my messages and included my original text. Is there a way to make my own messages visible in the conversation threads? Thank you! /Filip

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  • Security camera for HQ and remote sites?

    - by Atlas
    We want to install security cams at HQ site and 3 remotes sites. Basically: (1) Each site would have N cams (2) Each site should have DVR locally to record everything. What we want is that HQ to be able to see the live/recorded videos of each remote site and including itself. Preferably HQ would have 1 large screen, and display all cams of itself and remotes sites, say showing it in 32x32 cells. Does such system exists?

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  • Is there a system monitoring tool that lets me write complex queries against the data?

    - by benhsu
    I am looking for a system stat collection tool that will let me write queries against the data collected. I am planning to answer questions like: what is the average load, over the last 30 days, on this machine between 9AM and 5PM, as opposed to at night what was the average disk io on these 10 machines yesterday what was the average daytime memory usage on these 10 machines last week, as opposed to 2 weeks ago Has anyone done this with, say, collectd or graphite?

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  • How can I record system sounds (apps) in Audacity?

    - by Alex
    Or another similar program? All I want to do is record the sounds coming from say firefox, or any other app, for use as samples in music. I need to do this in both windows and linux (ubuntu 9.10). I have looked through the preferences of audacity but didn't find anything that let me select the system sound. Perhaps I overlooked it, because I was able to do this with earlier versions of audacity.

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  • Luns not taken by the windows server admin

    - by wildchild
    I have a scenario based question...Something , I haven't faced till now ,but i would be interested to know the answer. If i have assigned a luns (say, of 50 GB) and put them in storage group.However, the windows server team did not grab that lun but sent an acknowledgment saying the Luns are alingned. I would like to know what will happen to the Luns that belong to the SG ..in my opinion they will remain in the SG as unassigned Luns ..or is there a possibility that the lUns will move back to the storage.

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  • Managing hosts and iptables in scalable architecture

    - by hakunin
    Let's say I have a load balancer in front of 3 app servers. Let's say I also have these services available at certain IPs: Postgres server Redis server ElasticSearch server Memcached server 1 Memcached server 2 Memcached server 3 So that's 6 nodes at 6 different IP addresses. Naturally, every one of my 3 app servers needs to talk to these 6 servers above. Then, to make it a bit funkier, I also have 3 worker servers. And each worker also talks to the above 6 servers, but thankfully workers and apps never need to talk to each other. Now's the kicker. Everything is on Digital Ocean VPS. What that means is: you have no private network, no private IPs. You only have separate, random IP address on each machine. You can't mask them or anything. So in order to build a secure environment I would have to configure some iptables. For example: Open app servers be accessed by load balancer server Open redis, ES, PG, and each memcached servers to be accessed by each app's IP and each worker's IP This means that every time I add an app or worker I have to also reconfigure iptables in those above 6 servers to welcome the new app or worker. Is there a way to simplify this type of setup? I was thinking — what if there was a gateway machine between apps/workers and the above 6 machines. This way all the interaction would always happen via the gateway server, and when I add a new app or worker I wouldn't need to teach the 6 servers to let it in. If I went this route, then I'd hope a small 512mb server could handle that perhaps, and there wouldn't be almost any overhead. Or would there? Please help with best way to handle this situation. I would appreciate an answer as concrete as possible. I don't think this is too specific, because this general architecture is very common, and Digital Ocean is becoming increasingly popular. A concrete solution here would be much appreciated by many.

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