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• md5sum of large files gives different results sometimes

  - by Emanuele

  I have an AMD quad core, 8 gb RAM, 1 SSD EXT2 (2 months old), 2 HDD EXT4, approximately 1 year old. I'm using Ubuntu 10.04 x86-64 and when I compute the md5sum of large files (9 GB) sometimes I get different values than the one stored on a reference file. Upon restarting and switching off the PC then I get the expected results no matter how many times I repeat it. But this is random. I've turn on ECC (the fastest possible settings) and the issue seems to be rarer, but I've run memtest86+ for 6+ hours without a glitch (and with ECC off!). Any idea? Should I update the BIOS of my motherboard (Asus EVO-something...don't remember it now)? I've tried all the rest apart this, but genuinely don't know what to do anymore... Any suggestion is appreciated!

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• Function key emulator for Dell inspiron 6400 on external keyboard

  - by hardik988

  I have a 3 year old Dell inspiron 6400 with windows 7 and ubuntu 9.10 dual boot. I messed up my Laptop keyboard and hence my Fn key is not working and I need it to activate the wireless whose activation combination is Fn+F2. Is there any way I can emulate the Fn key or get my wireless to start in windows or ubuntu ? My bios has an option for Fn key emulation but that only supports external PS/2 keyboards and my laptop doesn't have a ps/2 slot. Any ideas would be appreciated ..

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• Multiple Graphics cards - Non Multi-Display Setup

  - by Alan Thomas

  Is it possible for me to utilize the processing capabilities of multiple graphics cards, even if I'm only using one monitor? I recently bought a new AMD graphics card, fairly top of the line. I also have a two year old, decent nVidia card. They're obviously very different cards. I don't really mind for gaming because my current card can handle most games fine by itself. I'm concerned about video editing programs such as Adobe Premiere and After Effects. Would the system be able to utilize the power of both cards to, say, render a video? I have both drivers still installed on my machine. And because there is only one monitor connected to my current graphics card (AMD) the nVidia would be connected to no display. So I am wondering whether it would or could be utilized in some way to help in processing video. Thanks!

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• Correct CPU Frequency in BIOS

  - by akula

  One of the machines I have is a 10 year old one. I can't discard it due to some sentiment (Mom). Legacy board: Mercury 810e, 133 MHz FSB Processor: Pentium III Tualatin 1.2 GHz Observation: I see an entry in the BIOS for the CPU Frequency from 6.0 to 11.0. Last value is Safe Mode. I don't know what value to choose for my CPU. So I'm running that CPU in "Safe Mode". What is the correct value for this CPU? Is Safe Mode really safe to run this CPU?

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• In CentOS 4.3 Webmin 1.3000 bandwidth monitoring is eating disk space. How to delete those files?

  - by Silkograph

  I maintain Linux server being used for Mail, Squid and DNS service. Recently I observed that something was eating server disk space. But at last, today I caught the culprit which was consuming the disk by storing large number of files. On this server, Webmin 1.300 is installed. We use Squid proxy and Sarg to monitor Internet access. I always manually clear Sarg generated files under /var/www/html/squid for last few years. But I never realized that Webmin is also storing some kind of bandwidth log files in its' directory structure. I have noticed that under /etc/webmin/bandwidth/hours it has stored more thousands of files since year 2007 totaling about 17 GB. We have used 40 GB HDD for this server machine. My question is how can I delete those (/etc/webmin/bandwidth/hours) files safely?

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• What is causing my internet to be slow on one laptop but not the other and only at a distance?

  - by Matt Case

  I have a newer laptop, purchased within the last year (acer aspire 7740). This laptop does not have any problem connecting to wireless networks and indicates that the signal strength is excellent on most of the wireless networks I connect to. When the laptop is within 10 feet of my wireless router it gets 30 down 10 up. When it is farther away than 10 feet it will be lucky to get 3 down and 1 up. I also have an older laptop, purchased in 2005, that has no problems at all at the same range. None of my phones, gaming consoles or tablets have this problem. I am beginning to think that the problem must be some hardware defect with the wireless card. I can provide additional information if needed. Just thought I'd check to see what others thought because I've been working on computers my whole life and have never heard of this happening. I have also tried to change the channels on my wireless router and have had no success with this idea.

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• Dreamweaver Files uploaded to Win 2008 server cause login prompt

  - by Lil

  I have a customer who uses a 4 year old version of Dreamweaver to edit her webpages. My hosting reseller account is with a company that uses Windows Server 2008. Every time my customer edits a page and uploads it, I have to set the permissions for that file to be readable, manually from the site's control panel. The customer is furious with me because her files cause the login prompt. I am able to upload files myself that remain readable to the site with both Filezilla and with Frontpage. I am assuming that her Dreamweaver settings are the cause of the problem but I don't have that program myself and don't know what to advise her. Any suggestions?

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• Cannot SSH into Amazon EC2 instance

  - by edelwater

  I read: Cannot connect to ec2 instance http://stackoverflow.com/questions/5635640/cannot-ssh-into-amazon-ec2-instance Amazon EC2 instance ssh problems etc... But could not fix it: suddenly (after a year of service, no changes on my winscp settings) it gives me "network error connection timed out" (im using ec2-user) (also from the amazon console). Log FILE: http://pastebin.com/vNq6YQvN All Sites that run on it run fine port 22 is allowed (never changed it) (security group) using the correct ec2-user and domain via my winscp / putty i can connect to other hosting (via ssh) update: SOLVED. I spend 2 days without looking at my own IP address .... (since it did not change the past 3 years....). Your comments made the spark in my brain. thank you so much. (and only now i find dozens of discussions from angry users that the static addresses from my provider are changed to dynamic ones: http://gathering.tweakers.net/forum/list_messages/1501005/12 ...)

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• Why does my netbook have more USB controllers than ports?

  - by yodaj007

  My netbook has three USB ports, but when I look in the device manager: Five are listed. Does this matter in the least (or, why are five listed)? The reason I bring this up: See, if I know that two of the devices in the device manager don't actually have physical ports, I can disable then and up that percentage on the other three, correct? I'm constantly being told that my devices can perform faster if I connect them to a USB 2.0 port, but this netbook is less than a year old. Thanks.

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• Alternatives to Citrix GoToAssist ?

  - by Evan Carroll

  Citrix GoToAssist is a really nifty little web application for customer support that allows you to take control of someones OSX, or Windows machine. Essentially, it works likes this: You log in to your management console You get a code You give them a code, and a website (fastsupport.com) They go there and enter in the code They accept the browser applet which installs a program on their computer You have control of their desktop You can see their desktop, configure applications, etc. They can also see when you disconnect. It is really rather nifty, but it doesn't support Linux and it is rather expensive (660$ a year). Does anyone know of any alternatives to this? I'm looking for a solution as simple on the user as this one, that doesn't require firewall configuration or setting up ssh/vnc/rdesktop etc.

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• Cheapest High Available Web Server [closed]

  - by xyz

  I would like to create a high-available setup (e.g. a small cluster) for a webserver, i.e. it will run Apache, PHP and MySQL. There will be between 2-8 small websites running with only very little traffic and workload. High availability is however very important. I don't want to be dependent on 1 datacenter, so there must be a minimum of 2 servers placed in different datacenters, and if one server goes down, the user must experience no or only a minimum of downtime - and no data loss. I have considered Amazon AWS using their Elastic Load Balancing, since it is possible to buy 2 EC2 instances in 2 availability zones and set up load balancing and RDS (Multi-AZ). However this seems rather expensive. Using the AWS price calculator http://calculator.s3.amazonaws.com/calc5.html it totals to 185$/month the first year (including the free tier). Are my calculations incorrect or is there a cheaper way to make this HA setup? Best regards

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• Same album repeatedly updates when syncing iTunes with iPhone

  - by Unsliced

  I have many many albums and tracks purchased via the iTunes store both through iTunes directly and via the iPhone. They all synchronise properly and are on iTunes eventually (i.e. if purcashed originally on the iPhone). There's one album, though, purchased via the iTunes app in June this year. Virtually every time I sync the iPhone it says "updating files" and this album gets updated. The rest of the sync goes just fine, new tracks added, listened to podcasts are removed, playlists are updated (notwithstanding that smart playlists' orderings are now utterly broken) fine - but this album is always getting updated. In finder I've looked at the permissions and nothing seems unusual. FWIW, I'm on Mac OS X 10.5.8, iPhone 3.1.2, iTunes 9.02. Anyone with any ideas? It's not a fundamental problem, but it does means that each sync takes an extra 30-60 seconds, which is annoying!

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• Using a second wifi router as a wireless bridge

  - by Greg-J

  I purchased a D-Link DGL-4500 to replace my aging WRT54G around a year ago, only to find it nowhere near as reliable. It's been collecting dust since. I'm wondering if there is a way to use it as a wireless bridge so I can connect it to my home network and then use it's ethernet ports to provide network access to several devices. Is this something that can be done? If not, are there devices meant for this? Any help would be appreciated.

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• How to fix Windows XP from muting sounds on every startup?

  - by Rookie

  This started to happen few days ago: Every time I start up my computer, the global sound volume ("Playback") is set to muted (from the checkbox), in the sound control panel. So I have to open the control panel every time i start up my computer, and click that checkbox. I have got this bug before, long time ago. I have no idea why is this happening. Any ideas how to fix this or what is causing it? I have SP 3 and most updates installed a half year ago or less.

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• Logitech MX3200 keyboard stopped working

  - by Roy Rico

  I have a Logitech MX3200 wireless keyboard and mouse set, and keyboard stopped working. I was working with it and it just stopped in the middle of using it. Some notes: The mouse still works flawlessly, i've tried to reconnect the KB i've tried to reconnect everything, mouse reconnects, keyboard reconnects (or pretends to) I've tried to hard reset (holding the connect button on the receiver for 10 seconds). I've tried new batteries I took out the batteries out of the KB & Mouse and unplugged the receiver over night. The media keys still work (launches winamp) but they main keys does not At this point, i've tried everything I've seen online. I just want to know is my keyboard dead in the water? I would say it's been about 8 months to a year since i've bought it, and the articles i find on the internet all say that's as long as they last... is this true? what's everyone's experience? I hope it's not true.

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• Unable to create a Windows 7 system image of a failing hard drive

  - by Rahul

  The hard disk of my one year old T400 Thinkpad has started failing periodic hardware tests. I get a "Targeted Read Test Failed" error. The "SMART short self test" times out. I am now trying to create a Windows 7 System image of the hard disk but it fails without giving any specific error messages. I tried using Comodo Backup but got an error (code 101117) there as well. I have copied the important files in Dropbox but would like to take a full System backup as I have plenty of software installed on the machine. Does anyone know why this is happening and how I can take a backup of the system image ?

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• Macbook superdrive got calibration problems

  - by Fractal

  I have an intel macbook dual 2Ghz, bought about three years ago. I've had some problems with the superdrive and changed it a year and a half ago. the drive is Matshita DVD-R UJ 857 now I'm into burning cd's again and try to burn a DVD with Toast Titanium from an .iso on my hard drive But it won't work. When I launch the burn, the disc suddenly stops turning, and an error log pops: medium error, sense code = 0x73, 0x03 then I try with the built in cd burner of the macbook as soon as I click burn, the cd stops turning in the drive, and error log says peripheral couldn't calibrate power of the laser required for medium so since I'm not that logical of a geek, I try my first idea: let's see with other brands of DVD! the problem is that it works, now. but I'd like for all of my medium to be usable, and I've already seen my ridata DVD being burn, so here's the question. What the hell is happening with my superdrive? :)

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• Is it safe to expect Sun Java 6 to supported for the life of RHEL 6?

  - by Ophidian

  I'm in the planning stages of a java application that we're targeting for Red Hat Enterprise Linux 6. Unfortunately, we're stuck at RHEL 6.1 which does not ship the java-1.7.0-oracle package set (they were added in 6.3) and I don't really have any control over when we will be upgraded to the more recent version. I don't have any specific technical requirements to use Java 7, but Java 6 is going to hit public EOL in February 2013. Am I safe to assume that since Red Hat (and subsequently Oracle with its Oracle Unbreakable Linux) has shipped a copy of Java 6 in the java-1.6.0-sun package, it will support it for the entire 10 year support life of RHEL6?

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• Does NTFS performance degrade significantly in volumes larger than five or six TB?

  - by Josh Yeager

  One of my customers is planning to set up a new document store, which will probably grow by 1-2TB per year. One of my co-workers says that Windows performance is extremely bad if it has a single NTFS volume that is bigger than five or six TB. He thinks that we need to set up their system with multiple volumes so that no single volume will exceed that limit. Is this a real problem? Does Windows or NTFS slow down when the volume size reaches several terabytes? Or is it possible to create a single volume of 10 or more TB?

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• PC powers up but there is no display

  - by Matthew

  I built a computer with standard components I bought from Newegg about three years ago. It ran great for 2 years and has sat powered down for the last year. I tried to power it up today and the display was blank. It powers up, lights come on, drives start spinning but there is nothing on the display. I verified that the monitor and video adapter work. I also tried the video adapter in a different slot on the mother board with no luck. What's the next thing I should try? Is the mother board shot? Thanks.

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• mosh-like port forwarding

  - by Marc Merlin

  This is on linux, connecting to linux servers: I love mosh, but it doesn't support port forwarding, and likely won't for a while since it's been almost a year now and it hasn't happened yet. port forwarding over ssh is great, but because my laptop moves between networks several times a day, my ssh sessions die, and so do the port forwards. I could script/hack something to detect hung ssh and reconnect to get my port forwards back, but before I do this, is there another way to do long lasting port forwards when your source IP changes several times daily (because you go on different networks)? I'm thinking an ssh over UDP would do the trick but of course ssh is over TCP.

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• vps running out of memory, 200MB free

  - by demon

  At the beginning of this year I took a VPS for my website because I was running against the resource limits from a shared hosting. Here are the things I know: 2GB memory, with 1GB swap Debian X64 server ED installed Software running on the webserver: mysql apache postfix pop3 imap amavisd clamd cron fail2ban munin-node pure-ftpd spamd nginx Now for the setup: Nginx listens on port 80 and handles the static files, the php side is done by apache2 running mod_php in combi with apc(no var caching!). Iam using a pretty 'busy' drupal and phpbb stack on the server, for drupal iam using boost and authcache to handle of the server load with a pressflow stack. phpbb is just phpbb3 with some mods installed, but has at max 30 users online at a time.. The problem is that its staring to use the swap after a few days after a reboot and thus the site becomes slower. I'v added pictures of monit and munin, so maybe somebody can help me out... Monit: Munin:

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• Why does my laptop shut down, does it get too hot?

  - by Kevin P.

  When I play games, or use powerful-applications such as Autodesk Maya, my laptop just shuts down, ofcourse without any warning at all. This is what I've tried so far: Cleaned my fan, completely! Checked if I have enough RAM and good enough graphics card, and I do. (6 GB RAM, Nvidia GeForce GT540M with 2 GB VRAM) None of these options worked. Even tried to clean my fan twice! Now, I have some options I could also try, but I don't know if that have anything to do with it or not. I was thinking reinstalling my Windows 7, because maybe it has to do something wrong with the installation? My laptop is about a year old, and this problem just happend out of no where, short after I downgraded from Windows 8 Release Preview to my original Windows 7.

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• SSL certificates and whether a wildcard common name will support domain.com

  - by timpone

  Sorry, if this is very vendor specific but I purchased an inexpensive SSL Cert from GoDaddy. Right now everything on production is hosted off of www.domain.com. When specifying the common name would a wildcard (ie *.domain.com) cover the case of a lack of a third-level domain such as domain.com? Just to be sure, I made it for www.domain.com rather than a wildcard. If it matters, I will be using with nginx and a mod_passenger. If I want to cover everything including domain.com and staging.domain.com, www.domain.com etc, would a wildcard be the proper cert? Does the inexpensive godaddy cert (12.99 / year) cover wildcard certs (it didn't seem to for me)? Again, sorry for asking vendor specific questions and thx in advance. thx

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• Problems restoring old backups in NetBackup 6.5

  - by gharper

  I had a server that was decommissioned & replaced last year, and since the server was no longer in use, I deleted it's client & backup policy from the NetBackup Admin Console shortly afterwards. I recently got a request to restore a file from the old server, however when I specify the source client for the restore, I get an error message saying: WARNING: server (backupserver) does not contain any backups for client (oldserver) using the specified policy type (Standard) as requested by client (backupserver). [Ok] In addition to that error, I can't seem to run a Client Backup report on the old client any more to determine what tapes I need to recall in order to re-index and restore the files... My questions: Does deleting the client somehow remove NetBackups ability to ever restore files from the old system, even if the backups have a retention period of infinity? Is there a way to restore the file from the tape, assuming I can figure out which tape I need?

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