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• Network monitoring library, or objects, for a cloud

  - by Andrew Smith

  I am looking for library to support server / switch monitoring, to actually be able to check with the device if it's working OK. However this requires some sort of auto-detection and device support. Basically I need to automatically detect a new device, start monitoring it like CPU and PING. So how do I auto-detect the machine remotely, this is something I need library for. Rackspace has something like this - "Cloud Monitoring API". But is there anything opensource which can be used same way? The Nagios and others doesnt have such API, and the big and expensive systems are too big to handle in public cloud, so there must be some other network monitoring engine with API, which can add a new servers automatically and support user isolation for example so I dont see other servers except mine.

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• Connecting desktop computer to the internet through laptop wifi

  - by Josh

  Due to some home network complications I have had to move my router to a seperate part of the house, therefore the wired network I had set up can no longer work. Before I find the time to go out and buy a Wifi adapter for my desktop PC, I have a laptop that uses a built in Wifi card to connect to my router and this can connect to the internet, and I was wondering if I could somehow access the internet on my desktop PC via my laptop. I'm hoping for a not-so-complex solution as this will only be set up for a few days, but it is quite vital that my desktop computer gets internet access. Does anyone have experience in this sort of thing and can help me out? Thanks.

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• How Do You Stress-Test Your Hard Drives?

  - by MetaHyperBolic

  When looking for large new drives (= 1 TB) on newegg and the like, I note a number of reviews talking about drives being either D.O.A. or hitting the Click of Death (or even releasing the Magic Smoke) within a week or so of use. A portion of the reviews mention this phenomenon whether the drive in question is Western Digital or Hitachi or whatever. For those of you using Windows, what do you to: 1) Place a large initial stress on the drive to see if it can take it? For how long? 2) Test the drive afterwards (presumably with some sort of S.M.A.R.T. tool or others) to see if any negative changes have been noted? Note: This is one component of a larger plan for both high-availability and backups for my home data.

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• How to benchmark kernel (-Os vs -O2)

  - by NightwishFan

  It seems logical to me that on a 64-bit kernel compiling it to optimize for size might help overall. (My distro of choice uses -O2) It has the benefits of more registers and memory and perhaps less cache contention than normal optimized code. I have a kernel compiled like this and it seems excellent. However my question is how can I prove this? I like using Phoronix for "real world" sort of benchmarks so I would prefer to test cases like that. What should I pick to test? Does anyone else have any alternatives? Thank you very much in advance.

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• Streaming audio to headless linux box

  - by Ralph

  I have a dual boot (Win 7 + Ubuntu) PC connected via wifi with my music collection on a local HDD. I usually use Rhythmbox on Ubuntu or Winamp on Windows to listen to my music but I'll change if I have to. I also have a Raspberry Pi (low power PC running Debian) in the living room that is usually headless and connected via ethernet. The Raspberry Pi is also connected to my living room speakers via an amp. I would like to be able to stream music from my PC over the network to the linux raspberry pi. What software can I use to do this? Some sort of audio client\server?

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• Having internet on a VirtualBox

  - by S4M

  I am running a linux laptop and I set up a VirtualBox under windows XP. My only problem is the VirtualBox doesn't seem to be connected to internet - When I do the connection diagnosis it tells me there is no connection. I am using an NAT adapter, and I bind the port 80 from my computer to the port 80 of the VirtualBox, and same for the ports 8080, but still no result. I would be grateful is someone could help me to sort this out. EDIT: thinking of it, what is making the problem hard - and painful - is the absence of error message. If I try to use a given adapter to share my computer's connection with the VirtualBox, and it doesn't work, I have no way to know why. So, it would be really helpful if someone could share a way to access this king of information (is there a log file somewhere or a way to run VirtualBox from command line in a verbose mode?).

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• Local dedicated hosting space (own hardware)

  - by Scott

  Where can I find local dedicated hosting space for my own hardware? I know I can rent dedicated hosting from various companies online, but usually I think that means I'm renting their hardware too. I just need a space with a network connection and a power outlet. That's it. How much would this cost? What would I search for? Is it available easily? Or would it only be the sort of thing huge companies would do? I'm in the greater NYC area. It's for a project I'm working on, but the thing's loud and annoying. I'd be willing to pay a little to get it out of sight and out of mind. I don't even care too much about the quality of the network connection. I'd rather not rent other people's hardware cause it probably would cost a fortune to rent a machine like this (tons of ram).

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• Dual Touchscreens in Different Rooms

  - by Ash

  I'm planning on having one dual-core system running two touchscreens, each in its own room in the house. I'd like to be able to use the internet on one, while someone else uses the other to record music - each of us interacting with the screen as we would separate computers. I was also thinking that running each screen, or certain programs, on its own core might make this work more smoothly. Will this setup work in Windows 7 Home on a mini-tower or do I need to invest in a server to get this sort of workstation/terminal setup to work?

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• How to migrate Lotus Notes Mail in database to Exchange public folder?

  - by elsni

  I need to migrate a Lotus Notes Mail database to Exchange. In the past, Users get mails in their Notes mail accounts and sort them manually by drag and drop in a specific folder structure in a seperate Notes mail database. This should be mapped to Exchange. I considered using outlook and a sharepoint Library mapped to outlook, but Outlook does not support drag and drop from the mail account to a standard doclib and the discussion libs do not support folders. So I think it's the easiest way to use an Exchange public folder instead of a sharepoint lib, which should work as in Notes (correct me if I'm wrong). But how I do migrate the old Notes db to the public folder including all subfolders? Thank you!

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• Why does my general frame rate slow down to 40fps randomly?

  - by Joshua

  This has been bugging me for a while. Every once in a while, I find my computer to be sort of laggy and I thought it was because it was busy or something. However, I recently noticed that it wasn't any performance issue...I thought my computer was laggy because the frame rate slowed from 75fps right down to ~40 fps and caused very visible tearing. This is not rare. It happens many, many times a day. I have no idea what is happening...I have an AMD 5670 on Windows 7 32-bit by the way, and I've heard bad things about AMD's driver support. Could this be the problem? P.S. The frame rate slowdown is not just for games (I rarely play games, and have not played games in the time since I noticed this problem), it seems it's an issue for the entirety of Windows. I first noticed the tearing when I was moving around tabs in Google Chrome.

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• Sendmail problem

  - by trobrock

  I am trying to get my server to be able to send email from PHP. Currently it is using send mail, but whenever I try to send mail to a gmail address I get this sort of response: --o54Mqd5s008981.1275691959/ServerName Content-Type: message/delivery-status Reporting-MTA: dns; ServerName Received-From-MTA: DNS; localhost Arrival-Date: Fri, 4 Jun 2010 22:52:38 GMT Final-Recipient: RFC822; [email protected] Action: failed Status: 5.7.1 Remote-MTA: DNS; gmail-smtp-in.l.google.com Diagnostic-Code: SMTP; 550-5.7.1 [xxx.xxx.xxx.xxx] The IP you're using to send mail is not authorized Last-Attempt-Date: Fri, 4 Jun 2010 22:52:39 GMT How can I set this up to relay through a google account that I own? Is sendmail the best thing to use, or should I switch to Postfix or something? This is on an Ubuntu Server 9.10

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• How can you convert audio (3.5mm) to S/PDIF?

  - by SSumner

  I have a monitor that I want to use as my 'TV' for my gaming system. I connect it via HDMI, so sound and video go through the monitor, but I want sound to my headphones, which travels via optical (S/PDIF) cable. The monitor (Dell U2713HM) has a 3.5mm audio jack on it for line out, but I couldn't find anything that simply plugs in an converts the analog audio signal to a digital one so I can plug in a S/PDIF cable. What sort of device do I need to do this? (I am not asking for shopping recommendations, merely what options allow this conversion. I would prefer the smallest option, as space is limited).

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• Chrome Crash Investigation

  - by iamcreasy

  Chrome is crashing very very frequently(every 2-3 min). It becomes irresponsive. How can I start investigate why this is crashing so much? It feels to me that certain components of some web pages are triggering the crash. I also checked "C:\Users\irfan\AppData\Local\Google\CrashReports", but this folder is empty. Some sort of process tacking tool, and keep an eye out for which request is being made just before the crash, or something like that. Any software suggestion? Im using Windows 7. Please don't suggest, reinstall chrome. I want to know why this is happening.

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• Simple local smtp server - minimal setup ubuntu

  - by malatio

  What is the absolute, bare minimum, no-hassle, hopefully idiot-proof way of setting up a local smtp server? If you're going to say postfix, what are these alledgedly bare minimum, idiot proof steps to setting it up? I'm sort of amazed at how difficult it seems to find this anywhere. I need: a locally hosted smtp server that sends mail to the internet. no tls or saslauth or whatever. only allows mail to come from localhost. no relays. It seems like there should be some software package somewhere where you install, set up an account and then you have a local smtp server. I'm not a sysadmin. People say postfix is dead simple but maybe I'm doing it wrong, all the setup docs I see are quite complicated, I actually don't have a spare hour to spend debugging a mailserver. I just want to send mail to the internet. Is it really that hard?

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• How can I trace NTFS and Share Permissions to see why I can (or can't) write a file

  - by hometoast

  I'm trying to track down WHY I can write in a folder that, by my best estimation, I should not be able to write. The folder is shared with "Everyone" has "Full Control", with the files being more restrictive. My best guess is there's some sort of sub-group membership that's allowing me to write, but the nesting of groups that exists in our Active Directory is pretty extensive. Is there a tool, that will tell me which of the ACL entries allowed or disallowed my writing a file in a folder? The Effective Permissions dialog is marginally helpful, but what I need is something like a "NTFS ACL Trace Tool", if such a thing exists.

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• USB Device With Embedded Fileserver

  - by Richard Martinez

  I'm attempting to access logs from a proprietary hardware box with no reasonable hope of modifying the software. There is a process on the device to dump log files to a flash drive on the USB port after entering a code sequence. Currently, analysis of the logs requires the following: Physical presence at the device Manual entry of the code sequence Removal of USB device Insertion of USB device into a normal Linux box I'm hoping there is some sort of device that can act as a USB mass storage device but simultaneously make it's contents available as a network file share (wired preferred). Does such a device currently exist? A combo hardware/software solution would also work.

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• Creating encrypted database for work

  - by Baldur

  My boss posed this problem to me: Encrypted: We need an encrypted database for miscellanious passwords we use at work that are currently only in people's head. Easily accessable: Someone needs to be able to quickly access specific passwords, possibly at hectic moments. This requires any sort of public key management (keeping it on a USB key in a sealed envelope?) to be relatively easy. Access control: The system should have groups of passwords where only specific people have access to specific groups. Recoverability: We need to make sure passwords from one group aren't lost even if the only users with direct access quit or pass away—hence we need some way where (for example) any two members of senior management may override the system (see the treshold link below) and retrieve all the passwords with their key. The first thing that jumped into my mind was some form of threshold and asymmetric cryptography but I don't want to reinvent the wheel, are there any solutions for this? Any software should preferrably be free and open-source.

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• when connected to vpn, can't access certain things

  - by shsteimer

  my companies vpn is not a standard windows vpn. It uses Juniper Networks and it intalls locally something called "Host Checker" prior to allowing me to connect. I have noticed 2 things that I can't access while on vpn. etrade.com - no idea why this specific website, but I can't get to it, maybe https? use of my magik jack - I'm assuming this is some sort of a port conflict issue. if im on a call when i connect, i lose all reception. if i try to make a call after conected, ic an't even get it to dial. Can anyone tell me how I would even begin to debug this. I expect if I call the help desk they won't be much help, but if I can tell them the specific problems of conflicts, maybe I have a chance of them working with me to get it working.

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• Setup local EC2 style cloud?

  - by John Kramlich

  I was recently given 3 dual opteron 2400 servers with 4GB of RAM and 120GB hard drives. I am interested in setting up something similar to Amazon's EC2 for my own personal web development use. Basically, I would like to spin up instances from an ISO or other disk images and have them available to test and develop software. Are there open source solutions I can use to accomplish this? I am assuming one of the machines will need to act as a controller of some sort for the other two. I use Sun's VirtualBox on my local development machine to virtualize various versions of Microsoft Windows. However, I'm not sure if that's the best tool for what I am trying to achieve. I apologize in advance if this question is to vague to get meaningful responses. I am new to cloud computing and fairly new at server administration.

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• PsExec - what if the .exe you run remotely requires user interaction?

  - by Luca Matteis

  I use PsExec to deploy small .exe files to my workstations. Sometimes the .exe, for some reason, is incompatible with the system and opens a popup window with an error or some other message. Is there any way to know when the executable is 'stuck' there requiring user interaction? On my side I just have psexec running and waiting for the .exe to return (which will never return because the popup is stuck there). Since I run PsExec programmatically and I automate all the executions, when this Popup thing happens I find myself with hundreds of psexec processes stuck there and have no result back from them.. What's the best way to handle this sort of issue? Thanks.

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• How do I route traffic to website using a spcified network connection on Windows 7

  - by rwetzeler

  I want to route all traffic to a website over my wireless connection while the rest of the traffic using my lan. What I tried was first finding out the IP address of the website I want to go to. For example, lets say pandora.com. I found it resolves to 208.85.40.20. I have entered that entry into my hosts file. I then added that route using route add 208.85.40.20 mask 255.255.255.255 WirelessIP. It doesn't seem to work however. Instead of using the IP address, is there a way that I can just say.. this URL to route over that connection? Does anyone know of a program that I can install that will do this.. possibly some sort of proxy or a software load balancer that can do this?

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• AWS VPC - why have a private subnet at all?

  - by jkim

  In Amazon VPC, the VPC creation wizard allows one to create a single "public subnet" or have the wizard create a "public subnet" and a "private subnet". Initially, the public and private subnet option seemed good for security reasons, allowing webservers to be put in the public subnet and database servers to go in the private subnet. But I've since learned that EC2 instances in the public subnet are not reachable from the Internet unless you associate an Amazon ElasticIP with the EC2 instance. So it seems with just a single public subnet configuration, one could just opt to not associate an ElasticIP with the database servers and end up with the same sort of security. Can anyone explain the advantages of a public + private subnet configuration? Are the advantages of this config more to do with auto-scaling, or is it actually less secure to have a single public subnet?

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• How do I get these permissions working right so Apache can work with the files?

  - by cosmicbdog

  I am having a go at setting up my own Apache and can't seem to get my head around the permissions. Lets say I grab a file from somewhere off the web and it has permission of 600. I then upload this file via ftp to a user directory, which is also an apache virtual site, and so this file retains this permission of 600. This means that the user can read this file, but Apache can't: it will be forbidden. What is the most simple solution so that apache can read + write whatever files end up in the users directory? Can apache be granted some sort of root power over files in a directory?

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• Excel: How do I copy hyperlink address from one column of text to another column with different text?

  - by OfficeLackey

  I have a spreadsheet where column A displays names in a certain format. There are 200-odd names and each has a different hyperlink (which links to that person's web page). I want to reformat the name order so it is "Surname, Name" rather than "Name Surname" and retain the hyperlink in the newly formatted column. I have achieved "Surname, Name" easily by splitting the names into two columns (using LEFT and RIGHT formulae) - forename and surname - then I have a new column with a formula to return "Surname, Name." However, the hyperlinks are not in that new column and I need them. I don't want to do this manually, for obvious reasons. I cannot find a way of copying just hyperlinks from column A without copying the text from column A. So, effectively, what I need is some sort of macro to take, for example, the hyperlink from A2 and copy it to H2, with H2 still retaining the updated ordering of name. I don't have the knowledge to write this myself, so would appreciate solutions.

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• Permission issue when deleting folders

  - by nate

  I can't delete some folders and some actions are being denied because I do not have administrator access. But in my user account it says i am an administrator. I also just upgraded from Windows Vista 64-bit to Windows 7 64-bit, but I had this problem before upgrading, but now I am being denied more things. I also can't reorder the way files are sorted in folders. I can sort them through the default means, but I literally can't drag and drop them if I want to reorder them. I don't know if this is another problem or if it is related. Let me know if you need more information. Thanks!

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