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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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• Which firewall ports do I need to open in order for a domain trust to work?

  - by Massimo

  I have two Active Directory domains in two different forests; each domain has two DCs (all of them Windows Server 2008 R2). The domains are also in different networks, with a firewall connecting them. I need to create a two-way forest trust between the two domains and forest. How do I configure the firewall to allow this? I found this article, but it doesn't explain very clearly which traffic is required between DCs, and which traffic (if any) in needed instead between domain computers in one domain and DCs for the other one. I'm allowed to permit all traffic between the DCs, but allowing computers in one network to access DCs in the other one would be a little more difficult.

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• Nagios remote monitoring: NRPE Vs. SSH

  - by sam

  We use Nagios to monitor quite a few (~130) servers. We monitor CPU, Disk, RAM and a few other things on each server. I've always used SSH to run the remote commands, purely because it requires little to no additional config on the remote server, just install nagios-plugins, create the nagios user and add the SSH key, all of which I've automated into a shell script. I've never actually considered the performance implications of using SSH over NRPE. I'm not too bothered about the load hit on the Nagios server (It's probably over-speced for what it does, it's never been over 10% CPU), but we run each remote check every 30 seconds and each server has 5 different checks performed. I assume SSH requires more resources for each check but is there a huge difference? (I.E. enough of a difference to warrant the switch to NRPE). If it's any help, we monitor a mix of physical servers (Normally with 8, 12 or 16 physical cores) and Amazon EC2 medium/large instances.

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• Screen rotation hot key (CTRL+ALT+UP) not responding, what's going on?

  - by Jamie

  The other day my son (11 months) discovered a new hot key combination on my laptop. As I'm sure many of you are aware (I wasn't until the other day), on machines with Intel Graphics, pressing CTRL+ALT+{any arrow key} rotates the screen. After I recovered from my shock, and did a little sideways Googling to figure out how to fix it, I decided this might actually be useful. I read a lot of online documentation, and it fits better on the screen when it's rotated. Since it's a laptop, I hold the machine like a book and read it. It worked great all afternoon yesterday. But today at work I tried to show a friend this new trick, using the same laptop, and found that the CTRL+ALT+UP no longer works. I can rotate it to any orientation but the normal one. I'm guessing something else is intercepting this hot key, but what could be doing this?

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• CentOS: OpsCenter does not see other node's agent

  - by Alice

  I'm new with Apache Cassandra. I am trying to install a little sample cluster using two CentOS server. I followed the documentation (Tarball installation) and the nodes are up. However, when I go to OpsCenter, the nodes cannot see each other's agent (there is always "1 of 2 agents connected"..I tried to fix, but nothing change). I tried both to disable and enable SSL, I tried to set the incoming_interface in opscenter.conf, I tried almost everything the network suggested to me, but the problem persisted. Now, I have SSL enabled, and agent log tell me: "There was an error when attempting to load stored rollups." Is there someone that could help me, please?

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• cisco vpn client randomly disconnects with pfSense

  - by Andre

  My network has two gateways, one is a pfSense box that everyone uses. The other one is a TP-Link firewall essentially for tests. Some machines inside my network need to access a VPN through the Cisco VPN client. If one of those machines is using the pfSense box as the gateway, I experience random connection drops on the VPN. If I am using the TP-Link gateway that doesn't happen. I've tried changing the MTU in the pfSense box and that improved things a little bit but didn't really solve the problem. I also followed the guidelines for traffic shaping in pfSense and the connections still drop quite often. Ideas?

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• cpu usage nearly 100 constantly windows xp sp3

  - by user33882

  When running some heavy applications like games or virtual box for some time.. the cpu usage is normal for some 15 mins and then suddently cpu usage increases. even after i quit the heavy apps and when i start some other apps, the cpu usage of the new opened application is also very high.. this continues until i reboot the system. There is single particular process occupy more cpu. All the processes cpu usage is little high than normal.. Any solutions?

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• Need hard disk recommendation for linux home server.

  - by neotracker

  Hello, I'm planing to build a little linux homeserver. It will mainly be used for storage and maybe as an media pc. I plan to build a software raid5 with 4 1.5TB or 2TB hard drives. I already decided to use the Western Digital Caviar Green 1.5 TB drive, but then I read about some problems with the WD green series about many drives failing and that they are not recommended for raid anyway. Of course, I couldn't find much facts on the issues so I thought I just ask here ;-) What hard drives would you recommended for a software raid5 setup? As I only need it for storage, the whole thing doesn't have to be too fast. So I prefer a cheap price and silence to great performance.

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• Mail being delivered to both old and new server.

  - by Duane

  Two days ago I migrated our old site to a new server. I turned down the ttl before I did it and some email is still going to our old server and some to our new after a little over 48 hours. Both these are on shared hostgator sites. From what I can tell everything is set up properly. An nslookup points to the right ip address. Any insight? Support just tells me that everything is set up properly and I have to wait for propagation. I've never had it take over 48 hours though.

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• How can I automate my Linux computer to power off (and on preferably) under certain circumstances?

  - by Ashimema

  OK, So a little background; I've been using Windows Home Server as a Backup Appliance, Media Server and Share Server at home for some time. I decided it was costing me allot of juice so very early on added the "Lights Out" add-on to ensure it was only running as and when needed. I'm now looking to switch to a Linux based server and I'm looking for a similar tool/set of tools for advanced power management. Now the question; Anyone got any all-in-one suggestions (i.e with client parts for both Windows and Linux and a server part for the Linux server), or can anyone simply verify that I'll need to set-up all the individual bits for this myself separately? (A tool similar to "[SmartPower][2]" but for linux would be a great start)

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• Alien: .rpm -> .deb | Compability / Built per system?

  - by MaddinXx

  At the moment I'm playing a bit with alien (for OpenVZ packages on Debian) and was wondering myself about one question for which I was not able to find an answer anywhere. Therefor I thought it might be smart to ask here :) The question is... If I convert a .rpm to .deb on a system, how compatible is this .deb package? What do I mean? Will the .deb be working on other systems as well or is it per-system, e.g. that on every system the .deb package will be little different? That i386 and x86_64 are different is clear, so this doesn't need to be answered :) Examples that would be nice to know are for example: .deb built on Debian 6 64-bit - Ubuntu 12.04 64-bit (compatible?) .deb built on Debian 6 64-bit - Debian 5 64-bit (compatible?) etc. Thanks anyone reading this / helping me! Regards, Michel

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• How best to integrate PPA into Debian?

  - by eicos

  I'm working with ZFS on Linux, on my Debian squeeze server. I've found a useful package in an Ubuntu PPA, apparently by one of the ZoL developers, and I would like to integrate it into my package system. However, I am really having a terrible time doing this. It seems like it would be possible if I upgraded my system to the testing branch, but I'd prefer not to do this for obvious reasons. So, what is the One True Way to do this? Or, what is a passable way to do this, i.e. one that does not involve an ice nine-like assimilation of my entire system to testing branch? Edit: Silly question. I clicked the little green "technical information about this package" on launchpad and all was revealed.

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• Need to know who is hogging my bandwidth?

  - by Dev

  I have an ethernet connection to my iMac and with Internet sharing I am broadcasting the wireless network from my mac rather than using a wireless router. I use it to connect other devices wirelessly to the internet. But this makes all the traffic flow through my iMac. I wanted a way to analyze the traffic so that I know what connected devices are hogging the bandwidth at a given time and from which websites? I installed wireshark for mac and played around a little but it seems like an overkill when you first look at it. Can someone please help with few instructions to get what I need or any other way other than using wireshark? Thanks Dev.

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• RS-232 vs. RS-485

  - by user60524

  Doing a little research on the two to figure out which one may better suit my purposes (communications amongst different hardware). How do they fare against one another? Im far from being a specialist and have no idea where I would even start looking for data to compare and contrast. If possible can someone please answer the following questions in regards to each of these. Can they be networked amongst each other? Can they be easily networked over ethernet? What speeds do they transfer at? (Min, Max, Etc.) Reliability? Best framework to build on top of to support the above? Any standard communications programs? Debugging capability? Any help would be very much appreciated, thanks.

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• HTTPS vs. VPN for communication between business partners?

  - by Andrew H

  A business partner has asked to set up a site-to-site VPN just so that a few servers can communicate with each other over HTTPS. I'm convinced this isn't necessary, or even desirable. To be fair it must be part of a wider policy, potentially even a legal requirement. However I'd like to convince them to simply offer an IP to us (and us only) and a port of their choosing for HTTPS. Has anyone had a similar experience, or had to come up with a cast-iron argument against a VPN? Allow me to expand a little - we have a web service that initiates a connection to the partner's corresponding service using an encrypted HTTP connection. The connection uses a client certificate to authenticate. The connection is firewalled so only our IPs can contact the service. So why is a VPN necessary?

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• Is there any way to prevent a Mac from creating dot underscore files?

  - by SoaperGEM

  At work we're letting one of our very tech savvy clients actually help out a little with a few development projects specific to him. However, he uses his own personal Macbook, and as he edits files on our (Windows) networks, his Macbook always creates a bunch of unnecessary meta files that we end up deleting later. For instance, it creates a file called .DS_Store in any directory he opens, as well as "dot underscore" files for each file he edits. So for instance, if he's editing a file called "Main.php", his Macbook will create another file called "._Main.php". I know there are ways to prevent creation of .DS_Store files, but none about how to prevent creation of these hidden files prefixed with dot underscore. Is there any way to turn that off on Macs? Any way to prevent it from creating those files in the first place?

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• I keep getting OpenSSL Header Version not found error when compiling OpenSSH Debian Squeeze

  - by Romoku

  I built Openssl1.0.0d ./config shared no-threads zlib It installed fine to the default /usr/local/ssl I went and downloaded OpenSSH 5.8p2 and ran ./configure but now it keeps giving me a Openssl version header not found error even when I set --with-ssl-dir= I've tried it with arguments /usr/local/ssl/include /usr/local/ssl/include/openssl /usr/include /usr/local/ssl/lib I looked in config.log and found error: openssl/opensslv.h: no such file or directory which makes little sense since I pointed openssh to where it is store. /etc/ld.so.conf include /usr/local/ssl/lib I'm at a loss at this point. Answer (maybe): Because I am an idiot. include /usr/local/ssl/lib is incorrect. /usr/local/ssl/lib is correct. It needs to be before the first include.

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• Is there an easier way to type apostrophes on the Droid X keyboard? [migrated]

  - by Deane

  Is there an easier way to type apostrophes on the Droid X keyboard? I press and hold the period key, which brings up the little pallet of punctuation. But the apostrophe is inexplicably all the way over on the left. Can I move this closer to the right, where my thumb is while clicking and holding the period key? Alternately, can I somehow get an apostrophe on the overhead menu that appears when you type a space? This is the place where auto-correct goes, but when you type a space, it becomes a comma, exclamation point, question mark, etc. How can I get an apostrophe in this list?

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• Proxy Server suggestions

  - by Jon Menefee

  Here is the question I have that hopefully is not too general of a question. I have a network with approximately 25 PC's, 3 servers and 25 IP cameras. I have a firewall already on the network and it works fine for what I need, but my client is asking me if there is a way to put a Proxy server on the network to monitor where his employees are going when they surf the Internet. He is not wanting to block them (at least not thru the Proxy server), but he wants to make sure that they arent going to sites that would compromise the networked PCs. I have looked at TMG and it is a little more than what I want. I hesitate adding another firewall to the system because of the security cameras that are presently on the network (IP Cameras). I just want to put a policy in AD that would make certain Users (or Computers) use a Proxy server. Any suggestions on a good proxy server are welcome. Thank you

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• Taking over and Moving a PHP site

  - by KCavon

  I have a internal use PHP site at my new position. It only runs a few days a year off site so we keep it on laptops. The hardware it has been on, a 8 year IBM Thinkpad running Fedora, is dying. I have new Lenovo Thinkpad's running latest and greatest Ubuntu. I have copied the contents of var to a shared drive, renamed the old www folder in var on the new machine and copied over the old www folder. I can get to the login page and into the site, but when I look something up it returns Cannot Open. I know I cannot get to the MySQL in the new machine because users and passwords dont match. The version of the PHP from the old machine is before the setup script was included. I know very little about PHP. I am looking for input on the proper way to link the old PHP files to my mysql instance. Any help, much appreciated.

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• How to bring application to front every 15 minutes on Mac OS X Lion?

  - by johnnyb10

  I have a free or cheap little app called Desktop Task Timer LE that I've been using to track my time as I work on various projects. I'd like to have it pop up as the foreground app every 15 minutes to prevent me from forgetting to stop/change the timer after I've moved on to a different task. I know I can have the app launch using a script in Automator or AppleScript, but I don't know how to have that script fire off every 15 minutes. I've read about using Launchd and iCal, but I'm still not sure how to do it. (Actually, iCal is probably simple, but I'd like to avoid using it for this.) Any ideas? Also, a further feature would be to have it pop up after 5 (or x) minutes of inactivity on the computer. Not sure if this would work for my needs, but I'd like to test it if possible.

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• Ubuntu server 11 showing weird characters on console

  - by andySF

  I've installed Ubuntu server 11 after my last hard drive failed to perform. The install process and GRUB screen are OK but I have a problem with the console. I attached two photos because it's difficult for me to describe this issue. I have little knowledge about Linux. My server is used for git, file server, print server. I played with this command dpkg-reconfigure console-setup but no effect. It's nothing physicality wrong with my display or my memory(it's on board). I have run a memtest, and besides that withe the previous version of Ubuntu I've had no problems. The problem.

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• Notepad++ tabbing out of tags, autocomplete

  - by Matt

  I'm trying to learn a little HTML. Everyone says to use Notepad++ over notepad. I have autocomplete on. My question: When I type my opening tag and Notepad++ then puts"""" closing tag, how do I "jump" out of the tag when I'm done typing? If I tab or hit enter, I'm still stuck before the closing tag. I can use my arrow keys, but if I'm going to do that, I would rather just type the closing tags. Also if I have an UL of 10 items, and I want to change it to an OL, how do I select both the opening and closing tags so I may edit them at the same time? Thanks PS I wasn't able to post the HTML tags.

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• Why does my win7 back ground and theme settings reset to default after every reboot ?

  - by JubJub

  I have the new ASUS G73. Everything is perfect, but for unknown reasons to me after customizing the background and theme colors, rebooting resets all these back to default (the theme that originally came with the laptop) Is there a way to stop this madness? Is there some kind of configuration reset app that runs on start up for ASUS computers? This is my first ASUS so I don't know what to expect with the factory bloatware. No, I don't feel like re-installing bare-bones windows just to get rid of the bloatware. Everything works fine except for this one little thing :( Sniff.

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• Suggestions for someone wanting to become a Laptop Reseller

  - by Josh B.

  First of all, to give you a little background... I have had my Microsoft A+ for several years now. I used to run a small business repairing Xbox 360 consoles and I am currently a Network Engineer for a company in Ohio. I definitely know my way around a computer. I miss running a small business on the side and I'd like to get something going again. There is a really high demand in my area for Laptops and I was thinking about starting a small Laptop store out of my house. What is the best way to do this? I was assuming that the best way would be to buy barebones systems and build them yourself. If this is the best method, I would be very interested in any resources to get parts and such. Apparently Laptop parts aren't the easiest thing to come by (especially at a good price). Does anyone have any suggestions about how to get something like this going?

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