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  • Optimizing wireless router speed and minimizing interference.

    - by Tchalvak
    I've been experiencing problems with my wireless connectivity lately, and want to make sure that it's not related to the abundance of other wireless routers here in my building. So, what I'm looking for is a method (probably via some application or another) to audit the wireless channels (and other factors that might be important that I don't even know of yet) that are floating through the aether around me. Ubuntu or other linux apps are preferred, but some kind of windows/mac solution is possible, since I do have other OSes around me that I could install & test on. Router: netgear WGT624 v3 Hearsay tells me that channels 1, 6, and 11 are "non-overlapping" (I expect they aren't used for non-wireless-router purposes or something, not sure how they couldn't overlap with other routers using other channels), so perhaps my best choices of channel are limited, so if channels aren't really a big concern, I'd be happy to get links to other optimizations that I should look into.

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  • Which hosts have low latency across United States and Europe?

    - by Joost van Doorn
    I'm looking for some information on web hosts that have low latency (<100ms) to both the United States and Europe. The host can be in either the United States or Europe. Latency is most important to the United States, United Kingdom, the Netherlands, Sweden and Norway. Should be able to provide managed hosting. Hosting at multiple locations is not what I'm looking for. Answers should contain at least some latency information from multiple locations, preferably from Los Angeles, New York, London, Amsterdam and Oslo. Also some information on your experience with this host is preferred, do not rant, do provide details of your package (with or without SLA, dedicated or VPS etc.). From my own little research I found that probably New York based hosts can offer low latency to all these locations, but I do not have much statistics to back that up other than my own ping is about 85ms to New York from the Netherlands.

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  • What are the effects of the L root server now publishing DURZ?

    - by brent
    I'm curious what the actual effects of the L root server publishing DURZ today will be. On the nanog mailing list, someone said it's important to evaluate the systemic effects of root name servers publishing signed zones, even when not using DNSSEC. Meanwhile, RIPE's own published information on their changes to the K root server say there's no issue if your resolvers don't use DNSSEC. Can someone please clear this up? DNSSEC seems to be a messy, tangled web. If not enabling DNSSEC on my resolvers, do I have anything to worry about with the upcoming changes to the root servers?

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  • How to check that image sizes are ok or not

    - by Goran
    I am having many image files in one folder. Mostly there are jpg, but some png, bmp, gif, tif also (but jpg is most important if others are not possible). There are also many xml files in same folder with same names as image files are having. So there is something like this: 1.jpg, 1.xml, a.png, a.xml, 3g.bmp, 3g.xml... All xml files are having only 1 line: <IMGRES WIDTH="1234" HEIGHT="567" /> (of course numbers are not same). I am looking for some easy way to check all image sizes and confirm if they are same as in xml or not. So I want output like: imagename, xmlwidth x xmlheight, realwidth x realheight, match/error Is this possible in only Windows with no other software installed?

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  • Windows Updates settings issue!

    - by Kumi
    Hi, it's my first post here, don't wanna make it long, but I got a problem with my 'Windows Update' it won't show its setting's options. It only shows these settings: Important Updates, Recommended Updates and Who can install updates, it removed the other setting sections like 'Microsoft Updates' "Give me updates for Microsoft products and check for new optional Microsoft software when I update windows" or the last settings section 'Software notification' "Show me detailed notifications when new Microsoft software is available" Here's a screenshot of my Windows Update: http://img96.imageshack.us/img96/1963/windowsupdatescreenshot.png And here's how it was before and how should be: h**p://www.sevenforums.com/attachments/tutorials/3523d1242168648-windows-update-settings-change-wu_settings.jpg Thanks. PS: I'm running windows 7 RTM

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  • Does RAID 1 protect against corruption?

    - by Shaun
    Does Raid 1 protect against data corruption? For example, let's say that I am keeping all of my important files on a NAS that uses 2 disks in a RAID 1. If one hard drive has some kind of internal problem and the data becomes corrupted, does the RAID recognize this automatically and correct it using data from the other good disk? Could it even know which copy is the good one? Does RAID 5 protect against corruption? I know that RAID is not a backup solution. I am trying to figure out how to make sure that I am not backing up corrupt data!

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  • Why is my NTP controlled computer clock two minutes ahead?

    - by Martin Liversage
    The clock in my computer is configured to be synchronized using NTP. To verify this I have tried two NTP clients using various NTP servers. My computer and the NTP clients are in complete agreement about the current time even across a wide range of NTP servers. I also have a GPS and my national phone company provides an accurate clock available by calling a specific phone number. Both my GPS and the phone company agrees on the current time. However, my computer is almost precisely two minutes (or 1 minute and 59 seconds) ahead of what I believe to be the "real" current time where I live. Why is my computer two minutes ahead? I realize that synchronizing clocks using the internet may not be entirely accurate as there is latency, but two minutes is a very long time on the internet. Is NTP really two minutes ahead? I'm running Windows 7 and live in the time zone UTC+1, but I don't think that is important in understanding my problem.

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  • Can Apache 2 be configured to start sending gzipped data early?

    - by rikh
    We have Apache set up to gzip compress html pages before they are sent to the client browser. However, some of our pages are slowish to generate and it seems that Apache is holding on until it has the complete page, compressing it, then sending it to the browser. There are big chunks of the page (the main important bits) that are actually generated and output fairly quickly. Is it possible to configure Apache to start compressing and send data for the page as soon as the script starts outputting something? Is it is, can you offer any help is how to do this? If not, can you suggest any other way to get gzip compression working for the server? The scripts that generate the pages are written in PHP. We are using Apache 2.0 on Linux.

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  • Eclipse: would more CPU cores with HyperThreading help increase speed?

    - by Dylan
    I'm programming a very large project in Eclipse. Right now I use a dual core machine with 2GB RAM, but Eclipse is sometimes busy for minutes (refreshing/indexing/building), so I'm upgrading to a new machine (with 16GB RAM and an SSD). Now I must choose between an Intel 2500K or an Intel 2600K that has HyperThreading. The price difference is about $100. Would that be worth it, for Eclipse, or is more memory/faster drive much more important for Eclipse ? Can Eclipse make use of the HyperThreading at all?

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  • LAN speeds and firewall/switch connections

    - by microchasm
    I have a small network with about ten users. All workstations flow into a Dell PowerConnect 3424 which then has a single link to a SonicWALL firewall and from there to a cable modem. More important than internet connectivity is speed between machines (specifically a Windows Server box on the LAN which everyone uses simultaneously). I believe the 3424 has gigabit connections, but they look like they're for stacking. Is there a way to test the speeds on the LAN to see where the speeds are at? Is there any low-hanging fruit insofar as increasing speeds?

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  • Windows 7 Laptops "unable to find logon server"

    - by tombull89
    In the school I work in we have a large number (500+) of Windows 7 laptops on a Meru Wireless system and Server 2008 R2 Servers. We have an appalingly large failure rate where a student or staff member tries to logon (to the laptop joined to the domain) and is met by "There are currently no logon servers available to service the logon request". I've seen this question and this one and while removing and re-joining to the domain works, it's highly time consuming, irritating, and we (I) have more important things to concentrate on. The only MS KB article I can find is regarding a read-only domain controller (which ours isn't) and I'm at my wits end. Ultimately, is there a definitve cause and answer to this or am I stuck removing and re-joining the laptops?

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  • Isolate user from the rest of the system..?

    - by Shiki
    There is a non-techsavvy user, who doesn't want to learn, and can only use Windows XP or 7. The problem is, that the computer is shared which she would like to use, and the computer stores sensitive, important data. Since she clicks on everything, it's quite a russian roulette. How could I isolate her account from the rest of the system? Like having a profile on the computer (it runs Windows 7 now) which would have the files and other stuff sandboxed? I was thinking of having a dual boot system, but that could compromise the files too, or the boot sector (talking about Windows). Linux is not a way, hence ... see the first line. Is there such a software that can set up a sandboxed environment?

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  • How to require a cell input if another cell has a value

    - by Connor
    I'm trying to edit the VBA for one of my workbooks so that If there is a value in column A, then a value for column C is required or else the file won't save, but i'm having some trouble with this. I can get excel to check a cell for any input and require it have input, but I need it to check if a different cell has an input before requiring input. This is because not all of the lines in my spreadsheet will be used all of the time, but some people forget to put very important pieces of information in the spreadsheet which throws some of our balances off. An SKU is entered on the sheet when we switch to a new one, and I want the program to make sure there is an amount of product in a given cell every time a new SKU is entered onto the sheet. Thanks.

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  • FTP Synchronization software for Mac or PC

    - by evanmcd
    Hi, I've been using FTP Synchronizer for awhile and generally have had pretty good results with it. But, I've just moved to a Mac full-time (at work as well as home now) so want to get a native client if I can. I've tried the only one that I've found - SuperFlexibleSynchronizer - but it crashed every time I loaded up an FTP to FTP synch attempt. The most important features to me are: 1) ability to synch with a large number of files (thousands), as I generally work on sites with large number of files. 2) FTP to FTP synch. This would be very helpful as I work with some CMS based sites for which users upload files while on staging and don't want to move files locally first before moving live. Thanks! Evan

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  • How do I clean dust from a computer?

    - by Jonas
    As computers become faster and generate more heat it gets more important to have good ventilation, but that also increases the amount of dust sticking to the components of the computer. It's of course better to make sure the computer never gets dusty by vacuum cleaning around it (not in it) frequently. But what to do if it's already to late? I've heard that vacuum cleaning the computer itself is very bad, since it can cause static electricity that hurts the computer. So, Does anyone have any tips for how to remove dust from your computer?

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  • How to know currently open ports on the Windows Firewall?

    - by QIU Quan
    On Windows XP and Windows Server 2003, I can know currently open ports on the Windows Firewall using the following command: netsh firewall show state However, on Windows 7 and Hyper-V Server 2008 R2, when I give that command, it says: No ports are currently open on all network interfaces. IMPORTANT: Command executed successfully. However, "netsh firewall" is deprecated; use "netsh advfirewall firewall" instead. Apparently there are ports open because services such as NetBIOS NS, Remote Desktop, and Hyper-V remote administration are functioning. I tried a few 'netsh advfirewall' show commands, but didn't get a way to find out which ports are permit by Windows Firewall. Knowing the currently open ports, I can be sure that I'm permitting necessary and sufficient traffic to pass in, no more, no less. Going through the whole set of advanced firewall rules is so tedious and error-prone. Is there a command on Windows 7 and Windows Server 2008 to do this efficiently?

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  • How can I explain the difference between programs and documents?

    - by flashnode
    My friend gave me his laptop to salvage after being the victim of numerous viruses and malware. I asked him if there was anything important on the laptop that he wanted to keep. He said he wanted to keep his (legit) copy of Adobe Premiere/After Effects and a few videos he edited. He doesn't have the install CDs so I know the software he paid thousands for in 2007 is gone. I can still resurrect the original film (VOB). What is the best way to explain this?

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  • Postfix sends to original recipient name instead of alias name

    - by user141742
    I have setup Postfix as part of my ISPConfig implementation. It should just forward all mail. Clients should be able to define a new alias and receive mail on a different e-mail address, using ISPConfig. Example: A mail sent to [email protected] on my ISPConfig server should be forwarded to external mailbox [email protected] This works fine but one important thing. When opening the mailbox for [email protected] I see the mail with the original sender name, and the original recipient name, i.e. [email protected] I have tried the forward function and the send copy function on a mailbox in ISPConfig. Both cases show the original recipient [email protected] instead of the final recipient [email protected], as it would when I manually forward an e-mail. Can this be achieved without having to maintain a list for each entry? Thanks for looking into this. M.

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  • Munin - apache_watch_ plugin, does not show any data in the graphs that shows activity for per vhosts

    - by ovais.tariq
    I am using Munin for monitoring my server. I installed the apache_watch_ plugin so that i could see apache related activity. The graphs for apache_accesses, apache_processes and apache_volume work fine. But the graphs for Apache Documents served, Apache Input/output (bytes), Apache Requests don't show any activity in the graph. The important thing is that these graphs that don't show anything are supposed to show the data divided per vhosts. I am on Ubuntu 10.04.1 LTS (Lucid Lynx) and the munin version is 1.4.4. One thing that I think may be the cause for issue is that I have a separate config file for every vhost, which are included in the main config. But I can't really figure out any solution. Any help will be greatly appreciated!

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  • Full Backup & Restore for Windows Vista

    - by Thomas Matthews
    I'm looking for a freeware or low cost application that will backup everything, including registry on Windows Vista Home Premium and to restore from a CDROM disk. The destination is an external hard drive on USB 2.0. Searching on SuperUser and Stack Overflow show articles, but don't mention full backup of the registry and complete restore using CDROM. I would also like to have compressed output and incremental backups. One article mentions CloneZilla, but their web page says that the incremental feature is not supported. I am using Windows Vista Home Premium, Service Pack 1. I need to backup 200 GB onto a 230 GB drive and would like to have multiple backups (thus the need for compression). Other requirements: Single file restore Quality is more important than performance. Application must run on Windows Vista. Extra: Run as daemon or background task on 4 user system. Thanks

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  • How can I mount .IMG floppy disk images which are not 1.44MB or any other floppy format?

    - by Frank Computer
    I have several .IMG files, but they are different sizes which do not comform to any floppy disk format, i.e. not 1.44MB, 720K, 2.88MB... these .IMG files are like 420K, 832K, etc. Additional info: Winimage, rar, Magic ISO... none of these worked. The files I want to download are located in www.vetusware.com under DBMSOracle6. They are 2 files in rar format, but when I extract the rar's, I get forty-two .IMG files with varied sizes, not 1.44MB, etc. If anyone could please give it a try and succeed in mounting or reading the extractd IMG files, I would appreciate you letting me know how you achieved it, I really need this legacy Oracle 6/DOS version!.. IMPORTANT: I have DOS 6.22 running under Microsoft Virtual PC 2007. VPC07 can only mount IMG's which are only 1.44MB ot 720K. Screenshot of IMG file sizes Screenshot of the first IMZ file

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  • Problems with mailenable when sending to yahoo

    - by Naresh
    I m testing sending emails from mailenable webmail. I have no problems sending mail to gmail or hotmail, both work fine, but yahoo mail shows the attachment icon for the message even though the message doesn't contain any attachments, it's just plain text. It only includes a reply to a previous message, like this: message text ----- Original Message ----- original message text I copied the message content and sent it from gmail to yahoo and the attachment icon didn't show which makes me believe it's something with mailenable. What could possibly be wrong? Also, is there a white list for yahoo mail that I can join? And also for other popular webmail? I'm going to use this on a production website (site visitors use the contact us form to send messages to the site - the mail enable server running on the same machine as the web server - then I check the messages using the mailenable webmail and reply them). This is really important to me, your help would be really appreciated ...

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  • Detect damage done by virus

    - by user38471
    Hey, this morning after I went to college a virus infected my pc without any user interaction at my end. When I came home my computer was completely frozen and infected with lots of trojans. I have not typed anything important since returning so keys cannot be logged. However I want to know exactly when my computer crashed from the time of infection to see what could potentially be done remotely by a hacker. The virus my pc was diagonosed with was "fakespypro" http://www.microsoft.com/security/portal/Threat/Encyclopedia/Entry.aspx?Name=Win32%2fFakeSpypro on a fully updated windows 7 installation with firewall enabled. My computer was connected to an internal dorm room network, so probably that has had to do something with it. Any further information about how I could backtrace this virus infection or ways to discover what data might be stolen would be greatly appriciated.

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  • ubuntu input/output error

    - by rplevy
    I'm having a problem with Ubuntu that I'm finding hard to troubleshoot for reasons that will become clear: reboot -bash: /sbin/reboot: Input/output error dmesg -bash: /bin/dmesg: Input/output error ps -e ps: error while loading shared libraries: /lib/libproc-3.2.8.so: cannot read file data: Input/output error lsof -bash: /usr/bin/lsof: Input/output error fsck -bash: /sbin/fsck: Input/output error badblocks -bash: /sbin/badblocks: Input/output error So I can't see what is going on, and I can't remotely reboot. What can I do to get to the bottom of this? Interestingly: init 0 Segmentation fault I can cat /var/syslog but not /var/log/messages or several other important files. less and more don't work, neither do tail or head, etc.

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  • Vantec NexStar NAS Encloser - Writing large files

    - by peter
    Hi, I have one of these 'Vantec NexStar LX - NST-475LX-BK' drive enclosures. It is a NAS drive. When I write a file to the device using eSata, or a SMB share I cannot write files over 2GB. I think this is because the drive is formatted with FAT32. But when I access the device using FTP it doesn't matter. I can write files of any size. E.g. I wrote one on there last night which was 30GB. Does this make any sense? Why? I guess the most important thing for me is data integrity.

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