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• UPS and power strip interactions?

  - by chaos

  Sometimes I hear that you shouldn't plug (UPS brand X / any UPS) into (power strip brand X / any power strip) because of some interaction leading to poorly conditioned power, reduced battery life, massive explosions spattering the room with battery acid, and so on. Sometimes I hear that it's the power strip that you shouldn't plug into the UPS. What I haven't gotten is a clear idea of how reliable these recommendations are or how generally/specifically they apply. Can anyone speak precisely and non-urban-legendfully on these UPS and power strip interactions, if there are in fact ones worth thinking about?

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• How do I change the location of DivX cache files?

  - by andygrunt

  I recently installed to the latest version of DivX and suddenly found my C drive filling up with the cache files. I tracked it down to: C:\Files\My Videos\DivX Movies\Temporary Downloaded Files My old laptop (running WinXP) only has a small hard drive and any DivX cache files fills it up so I want it to use my D drive where I have a little more room. The trouble is I can't see anywhere in the DivX preferences where I can change the cache location. Can anyone tell me how I can change the location of the DivX cache files?

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• linux ssh -X graphical applications will not start when system load is high

  - by Chrisv

  So I am using ssh -X to access a server. I am at a Xubuntu desktop accessing a Ubuntu server that is in the next room. Usually everything works fine, but when the system load gets high, any graphical applications I have freeze and fail to be restarted. This happens even if the process that is causing the high load has been niced to a low priority with "nice -n 19". And even though the system load is high, the command line works fine with no delay, and other applications I have running on the server (e.g. virtual machines) run fine. But any graphical application running through X dies. When the graphical applications fail they usually give out an error message that suggests a time-out. It seems that something connected to X has a low priority and times out. But what is it, and how does one fix it?

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• Thinking of Powerline adapters for networking

  - by Henderson McCoy

  will powerline work as good as wifi I am now in a large house (renting a room) and the router is in the front of the house and I am in the back. Don't know if wifi will have the range and stability so I am looking at all the alternatives from running a long cable to powerline. looks like a powerline adapter set will cost about $50 http://www.bestbuy.com/site/Actiontec---500-Mbps-Powerline-Home-Theater-Network-Adapter-Kit/5215483.p?id=1218625358741&skuId=5215483 has anyone use these or other powerline adapters? how is powerlines speed? Are they more stable then wifi? powerline cost is good i am just currious about the performance

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• Share laptop Wi-Fi with router set up as access point via ethernet cables

  - by obie

  I have an ADSL modem which serves as a wireless router. There's a laptop connected to it through cable. On the other room I have a laptop which is connected through the router wirelessly. Since I have other appliances that need to get connected but are not Wi-Fi capable I have another Wi-Fi router. How can I share the second laptop's Wi-Fi with the second router so that the router can then serve as an access point to give internet to my other appliances through ethernet cables? I want something like this: INTERNETMODEM (WIFI)LAPTOP 1 (WIFI)LAPTOP 2 (WIFI)Router 2 (ETHERNET)DREAMBOX & WDTV What I've tried so far is opened the admin interface of router 2 then set static IP 192.168.100.13 and disabled the DHCP. The DHCP of the main router starts with 192.168.100.1 then I hooked up router 2 with the laptop 2 through Cat5 cable but for some reason it's not working.

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• KVM Switch for multiple monitors possible?

  - by jasondavis

  I have been curious about this for YEARS! I have never used a KVM switch (keyboard, mouse, monitor) switch to allow you to use 1 keyboard, mouse, monitor to operate 2 or more computers however I understand the concept and what they are for, just never really had a huge need for 1 until now. Here is my issue though. If possible I need to have a KVM switch hooked up to 2 computers in my room. The catch, I have 2-3 monitors on the PC, so I am looking for a way to have a KVM switch that will support multiple monitors. So PC #1 can be using a mouse, keyboard, 2-3 monitors like normal. I then hit the switch and it makes my mouse, keyboard, and 2-3 monitors switch to PC #2. Has anyone ever heard of a KVM switch being able to support multiple monitors like I described? Or how I can achieve this goal? Please help.

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• Change audio output depending on which one is on

  - by pkrish

  I have a PC that is hooked up to my HDTV (via a long hdmi cable) and to a monitor, which is in another room. I have speakers directly plugged to the PC audio out. The PC is next to the monitor and speakers. I am not sure but I think Windows can play sound on only 1 audio device at a time. And I can only set 1 device as the default output. I can get sound on the TV or speaker depending on which device I set to default. But I would have to do this every time I switch between using my TV or my monitor! Is there some way to configure such that sound plays through the TV if the TV is on, else it plays in the speakers? If this is not possible, then the next best alternative would be to get the sound to play on both the devices at the same time. Thanks!

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• I just ordered 70/10 internet service, and need a new router I think?

  - by data_jepp

  Before I had 25/5 service and the N standard router did just fine. Now it doesn't do the job. Online speedtest reads at 82 so I have the line. But my laptop is getting less than 30 in my room. My laptop has the following WiFi card: http://www.intel.com/content/www/us/en/wireless-products/centrino-advanced-n-6205.html What is this talk about 2.4 and 5GHz? Can my laptop be connected at once over both bands? And would that let me use the full 70Mb over Wi-Fi?

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• How can I switch between the HDMI and DVI outputs of my graphics card?

  - by Owen Melbourne

  I've got an Nvidia GTX 560ti card which currently I've got my 2 monitors hooked up to using the 2 DVI ports. However its got a mini-HDMI port which I've plugged a HDMI cable in (with mini adapter) and lead it into my TV which is across the room. I'm hoping to be able to toggle between the HDMI output and the DVI outputs, however I'm not sure how I'd go about this, Could somebody please point me in the right direction, I'm not really worried about having all 3 on at the same time so that isn't a problem, but if its possible then I'll do that.

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• Why does 1080p through a VGA cable fit my HDTV but is oversized when through an HDMI cable?

  - by GraemeF

  I have put together a new PC with a XFX GeForce GTX 260 graphics card and have it connected to my HDTV. First, I used an old VGA cable with a DVI to VGA adapter and plugged it in to my HDTV's VGA port. Running at 1920x1080 it fit the screen perfectly. Now, to avoid running another cable across the room, I have connected it with a DVI to HDMI cable to my TV's HDMI port, and the desktop at 1920x1080 is cropped by the edge of the screen. I have "fixed" the cropping by using NVIDIA's "Adjust desktop size and position" tool, which created a screen resolution of 1814x1022 to fit the screen, but this is no longer the TV's native resolution and confuses some software (e.g. WoW). Why does VGA work as expected, but HDMI is scaled up? Can it be avoided?

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• Open Source webapp that shows PC / Projector status in 30+ Lecture rooms

  - by Seanchán

  I am looking for a simple web application that only has a simple graphical representation of the current status of 30+ lecture rooms. I.e. Green = good, Red=bad i.e. PC or Projector not working. With a little message and a ETA as well. I am not looking for monitoring software, merely a way for a tech to flag a room as "technically challenged" until 1PM or until "Friday 10AM". With a message for those lecturers who are interested: "Waiting on replacement bulb" or "Power supply gone" I know this is a simple thing to code up yourself, but I am looking for something that has been around for a few years that has some cool extra little functionality that you wouldn't think of yourself. I just can't find anything like that out there. And just to be clear: not monitoring software, more like lecturer feedback web app.

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• What's an easy way to install a bunch of OSS apps in my home dir on my company's aging Redhat VNC servers?

  - by subopt

  My company's IT group doesn't want to install lots of common stuff on our VNC servers, which run RHEL 4. The list of stuff i want/need includes graphviz, midnight commander, various python libs, sqlite, netbeans, antlr, jdk1.6, etc. They've hobbled rpm somehow, so i can't do rpm --relocate. And i don't want the RHEL4 compatible revs of this stuff anyway. I've probably got the room to build all this stuff in my home dir, but i don't want to take forever tracking down dependencies. Looking for an easy way to get the apps/tools i need, and nothing (or very little) else. Any suggestions?

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• Secure PHP environments with PHP-FPM and SFTP

  - by pdd

  I'd like to set up secure environments for a small number of untrusted PHP websites on a Debian server. Right now everything runs on the same Apache2 with mod_php5 and vsftpd for administrative file access, so there is room for improvement. The idea is to use nginx instead of apache, SFTP through OpenSSH instead of vsftpd and chrooted (in sshd_config), individual users for each website with their own pool of PHP processes. All these users and nginx are part of the same group. Now in theory I can set 700 permissions on all PHP scripts and 750 on static files that nginx has to serve up. Theoretically, if a website is compromised all the other users' data is safe, right? Are there better solutions that require less setup time and memory per website? Cheers

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• MaxClients in apache. How to know the size of my proccess?

  - by Larry

  From http://httpd.apache.org/docs/2.2/misc/perf-tuning.html The single biggest hardware issue affecting webserver performance is RAM. A webserver should never ever have to swap, as swapping increases the latency of each request beyond a point that users consider "fast enough". This causes users to hit stop and reload, further increasing the load. You can, and should, control the MaxClients setting so that your server does not spawn so many children it starts swapping. This procedure for doing this is simple: determine the size of your average Apache process, by looking at your process list via a tool such as top, and divide this into your total available memory, leaving some room for other processes. The main issue is that I can't understand how to know the size, because, well i have the size of httpd on no more of 3888 But, if we need to determine the number for MaxClients, and I have 4GB of RAM, so I get: 972, so I should use like 900 in the MaxClients?

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• Acer Aspire 3680 Wireless Signal Problem

  - by SHiNKiROU

  I am using Acer Aspire 3680. I recently reinstalled Windows Vista, and the wireless did not work by default. I installed the "Atheros Wireless LAN Driver" on this site: http://support.acer-euro.com/drivers/notebook/as_3680.html The result, the wireless APs are successfully scanned. However, when I tried to join a network, even with 5/5 signal, an error message showed up diagnosing signal too little. I restarted as Ubuntu, and wireless worked perfectly, with same computer position. Even more confusing, When I moved to the kitchen (2 meters close to the router), the wireless connected, when I move back to my room, wireless failed on Vista and worked on Ubuntu. It is clearly the driver problem. Acer laptops seems come with pre-installed drivers, but after re-installation, they are all gone. (I can't find the original Acer backup disc) Please do not answer "move closer to the AP" and something related to "interference", as wireless worked with Ubuntu's default driver.

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• How to use WeirdX applet instead of X11 for remote connections in Mac OS X?

  - by penyuan

  When I am away, I've got an Apple PowerBook set up to use X11 forwarding with SSH to connect to a remote iMac client in my room for server administration. Whenever I start X client programs on the client iMac, X11 would start on my PowerBook, which is OK, but... Question: Is it possible to change my settings so I can use the WeirdX (a web-based java X server) applet to take care of the X client programs instead of Mac OS X's default X11? Is there a config file I can edit to chance the $DISPLAY variable, and what should I set it to? Is this even the issue? Thank you very much.

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• Rate limiting an internet connection per user

  - by Alister

  I've got a friend who has a "rent-by-room" property and includes internet access as part of this. However some tenants are somewhat hogging the internet (i.e. constantly downloading). I was wondering if anyone knows of a fairly easy way of rate limiting each connection to make the system more equitable. A preferred solution would be a cheap piece of hardware or some sort of Linux "appliance". I would rather not have to get an iptables headache if this is avoidable.

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• Connecting Small business network to Azure Site to Site VPN

  - by MarkKGreenway

  Would like to have connectivity between azure virtual machines and on LAN users. My current network has a Cisco ISA550 connected to the WAN (one Ethernet cable into the office the fiber transceiver is on a different floor)and any public servers can be one-to one NAT-ed to have a public and private IP. What is the best way to get a reliable connection. Between end users and the cloud? I want to know the preferred on site endpoint. Do the azure vm's have to have a local ip in the LAN subnet? (Right now 10.10.0.0/20 or 255.255.240.0 to give room if this is the case). If in purchased an asa550 would I put it behind or in front of the isa550. Would it be ahead or peer with the users switches? What is the best way to get a reliable connection. Between end users and the cloud servers?

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• Satellite TV on my PC?

  - by jasondavis

  What would be a good solution for hooking up the satellite TV box (Dish network) in my room to be able to watch it on my PC and possibly record video from it? Please share with me the best cards, cables, software, anything else needed to do this in the most efficient way? I am looking at the WinTV-HVR from Hauppauge. I am not sure, for performance, what would be the best to go with, PCI, PCI express, USB2.0? Also on the Hauppauge website I saw this note: "WinTV-PVR products will not work in PC systems with 4GB or more of memory." The new PC I am building will be 12-24gb of DDR3 RAM, does that mean their products will not work at all with my memory? So confused now!

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• Switch new hard drive with old hard drive (containing files)

  - by jeffmangum

  So my old pc is dead. I took off the HDD cause my files are in there. I have this new pc but the hdd is only 80gb. There are no important files in there so i can just throw it away. I want to switch it with my old HDD. But: I cant just plug in the old hdd to my new pc right? If not, how can i switch to that old hdd without losing my files? Will there be risk for my new pc when I plug in that old HDD (i mean i dont want to have 2 dead PCs) (My first plan was actually just adding the old HDD but my pc doesnt have room left for that.)

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• Converting my PC to a server

  - by Sean87

  I live in a university campus and luckly I have super fast internet in my room, with a static IP address. I tried to setup XAMPP and by pointing to my IP address from anywhere I can access the services running on my PC. Now I am thinking of hosting my own website on my own PC. I am not sure what else I will need (beside the static IP) to make this happen (if it is possible at all). I am running Windows 7 ultimate and of course I do have a domain registered. What should I point my domains DNS names to make this happen (I assume it is far more steps involved!)

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• How to use WeirdX applet instead of X11 for remote connections in Mac OS X?

  - by penyuan

  When I am away, I've got an Apple PowerBook set up to use X11 forwarding with SSH to connect to a remote iMac in my room. Whenever I start X client programs on the client iMac, X11 would start on my PowerBook, which is OK. Question: Is it possible to change my settings so that the WeirdX applet I have on my PowerBook will take care of the X client programs instead of the default X11? Is there a config file I can edit to chance the $DISPLAY variable, and what should I set it to? Is this even the issue? Thank you very much.

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• How to tell LAMP server to look at 2nd HDD for files when php is still pointing to a location on 1st HDD?

  - by Jizbo Jonez

  I have a phpBB install that currently has its attachments stored on my main HDD, but I am running out of room there fast. So I want to get a 2nd HDD installed on the server and put all of the phpBB files on that instead. So my question is how can I tell phpBB to look at my 2nd HDD for the files when it is still pointing to a location on 1st HDD? I've read a bit about softlinks and mod_alias but am still confused about how they work exactly. Does anyone know a good way to do this?

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• Tomcat repeated 401 and the client nonce cache

  - by PaulNBN

  I've got a Tomcat 6.0.35 service with a SOAP based webapp protected by Digest Authentication. We are seeing issues with various users getting repeated 401 responses since we upgraded to 6.0.35. Additionally we are getting the following entries in Catalina log: WARNING: A valid entry has been removed from client nonce cache to make room for new entries. A replay attack is now possible. To prevent the possibility of replay attacks, reduce nonceValidity or increase cnonceCacheSize. Further warnings of this type will be suppressed for 5 minutes. Any idea what is going on?

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• Carbonite has taken over my iMac

  - by Larry Rothfork

  I used Carbonite to back up 75GB on my iMac. I also created a folder on my iMac to copy files to, from an external hard drive and then use Carbonite to back up from there. And THEN thinking I had everything safely backed up and, in order to make room on my hard drive I DELETED some of those files, and instead of increasing disk space..my disk space has shrunk to 2GB... I know, I know..you can't use Carbonite like that, but now I have two questions. 1) What is the explanation for the decrease in disk space even though I have deleted about 20GB of those backed up files from my hard drive? It must have something to do with the way Carbonite references backed up files, And 2) Is there a way to extricate myself from this situation?

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