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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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• <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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• Apple's RAM limit real or "marketing"?

  - by Moshe

  I have a 21.5" iMac (Late 2009). Apple says that this can handle up to 8GB of RAM. They say that the 27" can handle more (up to 16GB). What happens if I install 16GB? Will it run? Crash? Use only part of it?

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• Restoring a DataBase

  - by jjj

  i have two deferent Servers databases connections , let say j and k .. and i have backup data file in j, i named it jtok.bak .. now , i am trying to restore a database in k from jtok.bak , the database name is kkk ... so ... is there a way to do that ?

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• Is it technically possible to read CD by its scan?

  - by Kuroki Kaze

  Lets say we have image of CD (from scanner). Can we technically read it? What DPI is needed?

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• What tools exist for monitoring the CPU and memory utilization of Firefox?

  - by vfclists

  Firefox appears to using too much memory and cpu even when it is idle What tools exist for monitoring the CPU and memory utilization of Firefox? I am thinking of an equivalent of Sysinternals Process Explorer for Firefox or something like top or htop, on a page, script and addon basis. More technically oriented, something I can see and hand over to the script designers or Mozilla and say "see what this doing to my browsing experience!!"

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• Is it possible/safe to downgrade from Thunderbird 3.0 Beta 4 to Thunderbird 2?

  - by Palmin

  I wanted to try out the Thunderbird 3.0 Beta 4 because I have some issues with Thundebird 2 that I know are fixed in 3.0. The question is, is it possible to downgrade from Thunderbird 3.0 to 2.0 or are there any problems with the preferences or mail format (I read somewhere that Tb3 uses a sqLite database for some of its storage)? According to http://www.mozillamessaging.com/en-US/thunderbird/3.0b4/releasenotes/ it is possible to remove the application itself, but it does not say anything about data compatibility.

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• What's the easiest way to auto-backup an EC2 instance?

  - by ripper234

  I have an EBS-backed Amazon EC2 instance. I would like to create a daily backup schedule, and keep, say, a week's worth of daily backups, plus a few older images (from 2,3,4 weeks ago). I don't mind creating the backups on the fly, with the snapshot mechanism, but I would like an easy wrapper to manage it for me. What is the simplest way to set this up? How much would this cost me, for a micro instance?

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• prevent cpanel/whm from automatically updating php

  - by j w

  I'd like to be sure that cpanel/WHM is definitely NOT going to automatically update my PHP to 5.3 (it will cause all sorts of errors for legacy code). So, please let me know where I should look (either in WHM control panel or via SSH) in order to satisfy myself that PHP definitely won't get upgraded to 5.3 without my say-so?

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• stdout and stderr of script doesn't get redirected when executed by cron

  - by gletscher

  Hi, when I execute ./script &>> log.txt I get a nice logfile, but if I have the same command executed by cron, lets say the crontab looks like this: * * * * * '/home/user/script &>> /home/user/log.txt' the log.txt will just be empty, I tried " and ' and ` and no ticks to enclose the command, any idea why the streams won't get written into the file?

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• Website which helps a user pick a motherboard?

  - by Tony_Henrich

  There are hundreds of motherboards out there and it's very hard to find a motherboard which fits specific requirements. Is there a website which offers an interactive decision making process to select a motherboard? Say you select a few options from a number of dropdowns and it lists a number of motherboards from different manufacturers which meet the selections.

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• Change Default directory of Documents and Settings?

  - by AlbertoPL

  Let's say I have Windows installed on drive C, however I install all of my programs on the D drive, and I keep my user profile on the D drive as well (things like My Documents). How can I have Windows use those folders instead of the ones on the C drive?

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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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• Scratch disks on solid state drives

  - by Kato

  For something like Final Cut Pro where you have scratch disks, is it absolutely a bad idea to use a solid state drive? There would be a lot of writing, but I'm thinking it would be less for video editing then say, programming? The read/write cycles for SSDs still seem pretty long...

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• Ubuntu X doesn't start

  - by den-javamaniac

  I'm running desktop Ubuntu 9.10 on my Dell laptop. Previously it was Ubuntu 9.04. After some period of time (lets say 3-4 months) my X fails to start automatically after some restart calls. If that takes place my network manager applet doesn't start either (after I do startx). Can any one point out what I'm missing/what's the problem?

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• How do you document a network?

  - by Esteban Araya

  I'm not sure how to ask this question, since I'm not in the field. Say you're a network admin and you leave your job. How does the new guy know where to start?

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• Can I switch between windows of the same type using AutoHotkey?

  - by justintime

  I know how to create an AutoHotkey script to switch to (say) a Firefox window. But suppose I have a number of Firefox windows open. I would like the key to switch to the next window each time it is pressed.

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• Vulnerability research. Is it really research?

  - by Benjamin

  IT security people often say they do "vulnerability research". They defend the idea that they actually are doing some kind of "research". But is searching for vulnerabilities in software real research? A geologist looking for mines in the desert is doing "exploration", not "research".

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• How do I generate a summary of tracked changes in a word document?

  - by david-ocallaghan

  Is there a way to generate an attractive summary of tracked changes in a word document? If I'm working on a ~100 page document and, say, I change two paragraphs on p.37 and update a table on p.74, is there a way to produce a Word document showing just the changed pages? Perhaps something like the summary / diff available in some wikis (e.g. https://en.wikipedia.org/w/index.php?title=Stack_Exchange_Network&action=historysubmit&diff=461134938&oldid=458998783)

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• Setting Keyboard Shortcuts in Ubuntu

  - by joemangrove

  Is it possible to do the following in Ubuntu? If so can someone point me in the right direction. Say you want to set a keyboard shortcut to do the following: For examples sake, set Alt+F to open Firefox and maximize it, but only if Firefox is not already running. If it is running and not maximized, then maximize the most recently touched Firefox window. If it is maximized, then minimize Firefox. Thanks, Joe

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• Can all notebooks record from the sound card?

  - by Stefan Walter

  Is it possible that a modern notebook (say built in the last 5 years) contains a (onboard) sound card that it is not possible to record from? I've always assumed that this is a very basic capability, but since I can't get it to work, I would like to check that before I put any more effort into it. In case it matters, my notebook is an ASUS UL50VT, I'm trying with Sound Recorder and Audacity under Ubuntu, but I am, at this point, not asking for "Try that"-support or software recommendations.

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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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• Automatic backup software?

  - by Mehrdad

  Every backup software I've seen (even the ones that claim "continuous" protection) only backs up files periodically -- say, every 5 minutes. What I'm looking for is true continuous backup software, i.e. software that can transparently back up files immediately before they are written to, so that I can be certain I have all the versions of a file that ever existed. Is there any software that does this?

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• Increase volume level of WMA audio files

  - by Stan

  Say a volume level of a WMA file is too low and hard to hear. Is there any tool can increase the overall volume level? Thanks.

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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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