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• why would you create two different subnets on the same physical network?

  - by xirtyllo

  I'm working at a messy location, one of the strange (for me) things is that on the same physical network there are two different subnets. Specifically some computers will have 10.0.0.0/24 and some others will have 172.16.0.0/24. There is only one DHCP server, which gives IPs on the 10.0.0.0/24 range, and there are two internet gateways, one with IP 172.16.0.1 and one with IP 10.0.0.1 . To give an example, I can easily swap one PC from one subnet to the other just by changing its IP and gateway settings. I am trying to imagine why they created the network this way, and which may be the possible advantages and/or drawbacks of having two different subnets on the same physical network. Any thoughts?

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• Why the huge difference between etch and lenny MySQL

  - by rmarimon

  I've been working on a program for the last year. The development environment is working with a database in MySQL running on debian etch version mysql Ver 14.12 Distrib 5.0.32, for pc-linux-gnu (i486) using readline 5.2. The production environment is working on debian lenny with version mysql Ver 14.12 Distrib 5.0.51a, for debian-linux-gnu (i486) using readline 5.2. I was just timing some database access and what takes in the development environment 150 seconds, takes 300 in the production environment. I checked the /etc/mysql/my.cnf files on both systems and the only differences are # development bind-address = 10.168.1.82 log_bin = /var/log/mysql/mysql-bin.log # production bind-address = 127.0.0.1 myisam-recover = BACKUP #log_bin = /var/log/mysql/mysql-bin.log I dump a database from the production and load it into the development and with the same server everything takes half the time !!! What should I check?

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• Music but no voice on headphones

  - by TFD

  I have normal stereo headphones which work fine On a specific PC running Windows 7 the external speaker and USB speakers work fine too But when I plug in the headphones, all I hear is muffled music, no voice track? It sounds like it is being split into 5.1, and I am getting just the L & R components, and not the centre voice channel? In the Playback devices (sound) control panel, I can adjust stereo or 5.1 for external speakers or USB speakers, but not for the headphones. The config button is grey out for them Is this the problem, if so how do I fix it?

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• Windows 8 Upgrade : From Windows 7 Trial

  - by Golmaal

  This is a bit complicated it seems. I own Windows Vista Ultimate 64-bit (Retail). It was okay, but around a couple of weeks ago I had some system crash and at that time I decided that I will install Windows 8 as soon as it comes out. However, because of some problems in Vista, at the time of crash, I installed Windows 7 trial. I had some urgent work to do which I accomplished and then I switched the PC off. Now I have purchased Windows 8 Pro Upgrade ($40 version). If I go for a clean install, will it be able to install Windows 8 on not-activated Windows 7? During activation, if it asks for Vista serial number, I can provide it. Or will I first have to install Vista and then only it will allow me to install Windows 8? Also, I used the Upgrade Assistant to download Windows 8 on my laptop (Windows 7 OEM). Will it work on my above mentioned desktop?

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• How can I share a printer and files on a Windows network over wifi

  - by Jacques

  What is the easiest way to create this setup: WiFi internet router separate in one room. Study room: Laptop with USB printer connected with wifi. My room: Laptop connected with wifi. I want to be able to print from the "My room" laptop to the "Study room" printer, and also share files between them. What is the easiest way to do this? Note, the wireless router needs to be in a separate room for both laptops to be able to connect to it. I've tried configuring homegroups and stuff to do with IP addresses that I found on the internet but have had no success. I'm not an expert with PC's but I've tried hard so there is probably just some trick to do it. If someone can help that will be great.

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• What VNC (or similar) software for Windows 7 Home allows me to control my parents’ computer remotely as an administrator user?

  - by Paul D. Waite

  Here’s what I dream of: I install Windows 7 Home on my parents’ PC. They have a regular user account that they use, meaning they can’t install anything. I have an administrator account, meaning I can install things for them. I install some sort of VNC software on their machine that lets me access their computer remotely under the administrator account, so that I can install software for them (or do other administrator tasks, e.g. updates) without actually going to their house. Is there any VNC or VNC-like software that supports the above? (I guess I might be better off buying them Windows 7 Professional, and using Remote Desktop. At some point I’ll give up and get them an iPad, but for now, remote Windows admin is the dream.)

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• Her microphone produces white noise, after a while?

  - by Wolfpack'08

  When my friend Skypes with me or gets on FB Video with me, her sound works fine... at first. After a bit, it starts sounding like loud static. It happens more frequently as we restart video chats, until it happens as soon as we open video chats. We usually restart her PC to fix the issue. Is there a process we could kill, maybe? Skip that question, if you will, and jump to these two: How do we fix this? Why is this happening?

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• Linked Tables not working With Access Database

  - by Kronass

  Hi, I have an Access database in a computer and I want to access it from other computer in the network. so I made mapped drive and created Linked Tables, then Imported all the objects (forms, queries, reports). when I open access database in the second computer and make any changes in using the forms non of the changes are affected in the main computer (supposedly server) and vise-versa. what am I missing? if this way will not work how can I access the Access database from other computer in the network and be able to use all the objects and make changes in it? hint: Access Version at main computer is 2003 and client pc 2007, will it effect?

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• Making a cracked or activated windows uncracked

  - by ugurcode

  I have a pc which has windows 7 license but I installed windows from an image i downloaded and it is already activated. for validating genuine microsoft, i need to entet my own product key but the necessary activation tools do not exist in my windows folder. What do? I googled stuff but because the keywords are too broad I couldn't find a useful tool DAZ doesn't work, activation button doesn't show up. When I enter my original key to Windows Anytime Upgrade, I get this error When I attempt using slmgr, I get this error I used sfc /scannow Now slmgr is existing, I entered slmgr.vbs -ipk XXXXX-XXXXX-XXXXX-XXXXX-XXXXX (replacing X es with the cd key) the operation successful. Now I have installed Microsoft Security essentials, which means the problem is solved. Main steps are here open cmd enter Enter "sfc /scannow" enter slmgr.vbs -ipk XXXXX-XXXXX-XXXXX-XXXXX-XXXXX Success

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• How to restore default iPod playlists on Amarok?

  - by obvio171

  I wanted to "reset" the collection on my iPod and ended up accidentally deleting, through Amarok, all the playlists, including the default ones like "Most Played" and "Highest Rated". Since these are dynamic playlists with a special meaning for iPod, I don't think creating new, normal playlists with the same name will bring their special behavior back. How do I restore them with the same dynamic functionality? Is there a way to do that on Amarok? Rhythmbox? GTKPod? Command line? P.S.: not entirely sure what the policy about iPod questions are, but this one in particular seems to me to be very computer-related because, although it's about interfacing with a device, everything has to be done on my computer, using standard PC libraries/programs, etc. If it's still off-topic, please point me to where I could post it.

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• Internet not working on a VirtualBox Linux machine

  - by mtahmed

  I installed VirtualBox on a Windows 7 PC and installed Xubuntu (Ubuntu with XFCE) on it. Now on the Windows, I am connected to the internet through a LAN which automatically authenticates to connect to the network(because its my work computer). I have also installed the guest additions on this virtual machine (Xubuntu). I tried both NAT and bridging to set up internet connection but I still cannot connect to the internet. For NAT: The browser doesn't say website not found but it keeps trying to load it forever and the network status monitor (the one provided by VirtualBox) doesn't show any green light (no incoming packets). For Bridging: Same as for NAT but the network status monitor shows incoming packets and outgoing packets. But internet still doesn't work. I tried a lot of different things but none worked.

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• Changing The Text Selection Shortcuts on a Mac

  - by Berk U.

  I've recently switched over from a PC to a Mac and I'm wondering if there is any way to edit the text selection/deletion shortcuts on a Mac. I write a lot of code and I've found these shortcuts to be very helpful. Here is a quick overview of the deletion shortcuts (http://lifehacker.com/5803041/the-mac-os-x-delete-key-it-goes-both-ways); the selection shortcuts on the mac are similar, except that you can use arrow keys instead of delete. I'd be happy to learn of any method, though I would much prefer it if someone can come up with a way to do it using KeyRemap4MacBook.

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• How to start Windows Explorer as domain administrator [closed]

  - by Otiel

  Possible Duplicate: How do you run windows explorer as a different user? Is it possible to start a Windows Explorer with the rights of another domain user? I tried to do the following to start a Windows Explorer on my computer as my domain Administrator, but without success: Right click on C:\Windows\explorer.exe to select Run as different user, Enter the domain administrator credentials: Domain\Administrator ************ The windows explorer session only opens with my current user rights (Domain\me). The reason behind my question is that I want to change some folder rights on a domain shared disk and I need the Domain\Administrator user rights to do it. Usually, I do it by login as Domain\Administrator on the server hosting the shared disk but I would like to be able to do it from my PC, logged as my current login (Domain\me). EDIT As seen in the linked posts, it is not possible anymore on Windows Vista or 7. On Windows XP, the solution is to do: runas /user:domain\username "explorer /separate"

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• Where is the bottleneck?

  - by jsymon

  There is a limit on connections somewhere along the line here... On a windows server 2008 machine, each request to a url running on localhost takes ~3 seconds to complete. This is fine and normal for the url. However, if i open the same localhost url in about 10 tabs, and set them to reload all at the same time, they finish sequentially, 3 seconds after each other. Meaning the last tab has taken 30 seconds to load (3s x 10). What is especially odd is that firebug reports each page as taking 3seconds to load. Another point to add is that the status bar just sits at 'done' for the last tab until 3 seconds before completing, where it then changes to 'waiting for localhost'. I am praying there is some connection limit somewhere otherwise this would be a disaster if more than one user ever visited the site at a time! Maybe a limit or something where one pc cant make more than 2 simultaneous requests to a url at a given time?

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• Is this a graphics card failure?

  - by Alexander Lozada

  I own an older 32-bit Dell XPS 410 that I intended to use for gaming. Currently, I have a ATI Radeon 4000 series card installed, along with a Core 2 Duo and Ubuntu 12.10. I'm fairly certain that my problem is a GPU failure - but before I spend money on a new one, I want to make sure other components aren't the problem/if it would be cheaper just to buy a new PC. Here are my symptoms: Computer power button remains orange (usually green when successfully started.) A fan gets increasingly faster until powered off. Monitor remains black when started, receiving no signal. When powered on, the computer will power itself off near instantly, and then turn on again. If startup is successful, sometimes the screen will become jittered and unusable unless restarted. Is this just a GPU failure, or something more extensive like the motherboard?

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• DIR 601 No wireless internet

  - by ashley

  I have an orange globe on my d link router. I signed into 192.168.0.1 and went to Manuel Internet Connection Setup as I was told to do. When I clicked on that and tried to clone my PC's MAC address, it said invalid MAC address. Host Name : DIR-601 Use Unicasting : (compatibility for some DHCP Servers) Primary DNS Address : 0.0.0.0 Secondary DNS Address : 0.0.0.0 MTU : (bytes) MTU default = 1500 MAC Address : F8:1E:DF:EA:38:E6 How do I get a valid MAC address so I can save the settings and move on to the next steps I was told to do in order to get wireless internet again?

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• Excessive CPU Utilization for Bind 9.8.1 `named` processes

  - by justinzane

  I just noticed that named is eating vast amounts of CPU time for a very small network with only a few domains. Can someone help me determine what is misconfigured, please? Or how to debug this. top top - 14:13:08 up 25 days, 14:16, 1 user, load average: 1.04, 1.04, 1.05 Tasks: 149 total, 1 running, 148 sleeping, 0 stopped, 0 zombie %Cpu(s): 17.3 us, 4.3 sy, 0.0 ni, 78.2 id, 0.1 wa, 0.0 hi, 0.0 si, 0.0 st KiB Mem: 2042776 total, 1347916 used, 694860 free, 249396 buffers KiB Swap: 3976080 total, 30552 used, 3945528 free, 574164 cached PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 17445 bind 20 0 244m 42m 3124 S 99.4 2.2 2345:03 named rndc stats +++ Statistics Dump +++ (1352931389) ++ Incoming Requests ++ 65869 QUERY ++ Incoming Queries ++ 31809 A 241 NS 3 CNAME 27455 SOA 276 PTR 123 MX 462 TXT 5400 AAAA 7 A6 1 DS 14 DNSKEY 15 SPF 55 AXFR 8 ANY ++ Outgoing Queries ++ [View: internal] 22206 A 509 NS 10 SOA 25 PTR 12 MX 524 TXT 4851 AAAA 62 DNSKEY 19 SPF 3157 DLV [View: external] 87 A 2 NS 80 AAAA 120 DNSKEY 7 DLV [View: _bind] ++ Name Server Statistics ++ 65869 IPv4 requests received 27670 requests with EDNS(0) received 112 TCP requests received 65652 responses sent 20 truncated responses sent 27670 responses with EDNS(0) sent 62920 queries resulted in successful answer 37117 queries resulted in authoritative answer 28482 queries resulted in non authoritative answer 7 queries resulted in referral answer 591 queries resulted in nxrrset 53 queries resulted in SERVFAIL 2081 queries resulted in NXDOMAIN 14530 queries caused recursion 162 duplicate queries received 55 requested transfers completed ++ Zone Maintenance Statistics ++ 109536 IPv4 notifies sent ++ Resolver Statistics ++ [Common] [View: internal] 29362 IPv4 queries sent 2013 IPv6 queries sent 28531 IPv4 responses received 4209 NXDOMAIN received 6 SERVFAIL received 31 FORMERR received 32 EDNS(0) query failures 3359 query retries 836 query timeouts 5348 IPv4 NS address fetches 3271 IPv6 NS address fetches 83 IPv4 NS address fetch failed 2779 IPv6 NS address fetch failed 17421 DNSSEC validation attempted 12731 DNSSEC validation succeeded 4690 DNSSEC NX validation succeeded 21104 queries with RTT 10-100ms 7418 queries with RTT 100-500ms 3 queries with RTT 500-800ms 1 queries with RTT 800-1600ms [View: external] 192 IPv4 queries sent 104 IPv6 queries sent 192 IPv4 responses received 2 NXDOMAIN received 104 query retries 44 IPv4 NS address fetches 44 IPv6 NS address fetches 1 IPv4 NS address fetch failed 1 IPv6 NS address fetch failed 4 DNSSEC validation attempted 3 DNSSEC validation succeeded 1 DNSSEC NX validation succeeded 152 queries with RTT 10-100ms 40 queries with RTT 100-500ms [View: _bind] ++ Cache DB RRsets ++ [View: internal (Cache: internal)] 2007 A 652 NS 131 CNAME 1 MX 32 TXT 421 AAAA 28 DS 244 RRSIG 110 NSEC 3 DNSKEY 2 !A 2 !TXT 89 !AAAA 2 !SPF 14 !DLV 148 NXDOMAIN [View: external (Cache: external)] 55 A 12 NS 34 AAAA 2 DS 10 RRSIG 1 DNSKEY [View: _bind (Cache: _bind)] ++ Socket I/O Statistics ++ 82958 UDP/IPv4 sockets opened 2118 UDP/IPv6 sockets opened 4 TCP/IPv4 sockets opened 1 TCP/IPv6 sockets opened 82956 UDP/IPv4 sockets closed 2117 UDP/IPv6 sockets closed 58 TCP/IPv4 sockets closed 15 UDP/IPv4 socket bind failures 2117 UDP/IPv6 socket connect failures 29554 UDP/IPv4 connections established 59 TCP/IPv4 connections accepted 2117 UDP/IPv6 send errors 5 UDP/IPv4 recv errors ++ Per Zone Query Statistics ++ --- Statistics Dump --- (1352931389)

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• HOSTS File Edit in Windows 7 Not Effective - Pinging URL Still Shows Original IP Address

  - by Sootah

  I've edited my HOSTS file on my Windows 7 Ultimate PC to re-route a couple of URLs so that they point to 127.0.0.1, but after saving the file (and re-opening to verify the changes were written) and pinging them they still reply with the actual IP instead of being redirected to 127.0.0.1 as they should be. At least, that's how it worked in XP, Vista, etc. I even went so far as to restart my DNS service on the machine via services.msc; but no dice. So - I would imagine that Windows 7 keeps the HOSTS file there for legacy purposes and doesn't actually use it anymore. Is there a way to make W7 pay attention to the HOSTS file? In the event that you can't do that, where would I go to edit where these URLs point to? Thanks in advance! -Sootah

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• How do I run AWS code on an EC2 instance?

  - by Marianna

  I just started with Amazon web services, and I have an EC2 instance. I downloaded the JAVA SDK and the Eclipse toolbox. I am able to run a sample program locally on my PC and connect to the Amazon databases, etc. My question is, what do I need to do to get this working on my EC2 instance? This may not even be specific to AWS. On Eclipse, I can just "Run as Application" and run any code. On the server side, what do I need to do? Should I ftp over my .java files? Should I export it to a jar and upload that? Do I need to install anything special to actually run it?

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• "Snapping" when in RDP

  - by Paul

  I am using mstsc.exe version 6.0 (Remote Desktop non-Metro version) from an XP machine and cannot get Windows 8 snapping to work. I can drag a metro app window to the left or right, but it doesn't stick, it just bounces back to full screen. The snap bars do not appear. The client PC has two monitors, each with a resolution of 1280x1024. While mstsc.exe 6.0 does have an option to use both monitors simultaneously in normal settings, I am launching it with spanning enabled: mstsc.exe /span So the effective resolution in the session is 2560x1024. Is there a trick to getting this to work over RDP?

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• Hypervisor for mixed client and server OSes

  - by Mark

  I need to replace three old boxes I use for development, running Linux, Win Server and Win XP. Instead of purchasing three new boxes I am thinking of purchasing a single box and virtualizing the OSes. As it is for development, absolute performance is not a problem, but I want the Linux and Win servers to run continuously, while running Win 7 as if it is a regular PC. Therefore running Linux and Win Server on top off Win 7 is not an option. Is this a viable solution? Has anyone done this? What is performance like? I'd like to get decent graphics performance with Win 7, sufficient to run the occasional game. If so, I'm looking for suggestions or recommendations on which hypervisor or virtualization option to go for.

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• Mutli-processor workstation as a workstation/server

  - by posdef

  I work in a research institute and a number of programs we use are computationally intensive (I actually wrote one of them). Right now we have one computer that is dedicated for one of these programs (with local accounts only, as in users physically sitting in front of that pc) and the other programs are run on individual workstations assigned to people. I have been looking around to common brands such as Dell and HP, for a some sort of a small/medium scale server, which can be used as a workhorse by sending tasks remotely. It appears as if there is nothing in between workstations with one 6-core processor and a bunch of extras (like fancy graphics etc) and rack mount servers with ridiculous amount of RAM and HDD expansion capabilities but still relatively little number of processors/cores. I wonder if what I am looking for is such a small niche product? Are there other solutions that I might not be aware of? Does anyone know of a multi proc- multi-core workstation/server that is still within the reasonable

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• Work firewall blocking Gmail IMAP port

  - by Sean

  My work has a very over protective firewall. We use Google Apps for our email and so can access the web interface just fine. I use my laptop at work however (MacBook connected via WiFi through my AirPort Express), and prefer to use Sparrow to check my email. The problem is that our firewall blocks whatever port Gmail's IMAP server uses. I'm trying to figure out the easiest way to work around this. I'm guessing I'll need to use an SSH tunnel or VPN, but I'm looking for specific instructions. I'd prefer to only route the IMAP stuff around the firewall as opposed to using a VPN full time. I have two computers at home (one PC, one Mac Mini) that are always on and could probably act as a server if needed.

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• How to calculate power/energy taken by computer and screen

  - by r0ca

  I need to investigate how much power my linux machine uses per week. I can take a look at the PSU but I would like to know how to calculate the average use of power it takes. I also need to know how much power a CRT screen use per week. Do I need to check the PSU Watt unit and Screen Watt usage and just add both to have the results? P.S. My english is not good, sorry about that! P.P.S. My question is not related to: http://superuser.com/questions/9946/how-to-choose-a-ups-calculate-power-for-a-new-pc

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• UNRAID V4.7: Lost write permission on Win7/Android devices

  - by JROC

  I'm currently running V4.7 and I haven't touched any of the user or share settings, and I'm periodically losing read.write permission on both my windows 7 pc and my android tablet connecting over the wireless. Sometime I can access my shares and see the folder directories, but when attempting to open a folder windows denies me access saying I don't have the proper permission. This is after I have logged in with my main account that has full read/write access of everything, same on my android device. This all started when I attempted to delete a large amount of files (8gb) to make more room and about half way through started getting permission errors. What could be causing this? Thanks

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