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• What apps are available for smartphone platforms to allow free calling to the UK and other countries? [closed]

  - by Andrew Ferrier

  On the iPhone, I use MagicJack to get completely free calls over WiFi to US numbers. I'm looking for a similar app to enable me to call UK numbers for free on the iPhone. Does anyone know of one? To make this question of broader applicability to everyone, what apps also allow free calling to other countries? Any smartphone platform (iPhone, Android, Blackberry, Windows Phone) could be useful. Note: I'm talking only about apps that allow completely free calling - the Apple app stores at least are full of apps that allow "cheap" calling. Suspicious apps that require credit card numbers upfront, etc., aren't as interesting.

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• Can I run my OS from a DVD?

  - by Dave D

  I'm thinking of ways to get around the high cost of hard drives lately. I was thinking an optical jukebox would be interesting (though more expensive than just buying a hard drive), then thought I've heard of OS's run from DVD so why not boot from a Blue-ray drive. I think a smaller OS like a linux flavor would work. I'd like to know if there's a way I could burn Windows 7 to DVD for this use. Just curious. Anyone know if this is possible? Thanks, Mac

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• Any good resources on setting up an ubuntu virtual machine for web development?

  - by Relequestual

  I'm currently on my placement year at uni with 4 months left. Before working at my current place, I have not used a nix environment for web development and have used WAMP. Over the past year I have found some very interesting new tech that requires a bit more than my shared hosting even to play with (eg node.js, RoR 3). At work we use a Virtual Machine for development, but that's all been set up and configured to match the live servers, and is managed with a Puppet server. Are there any really good resources for setting up and configuring an Ubuntu VM as a web server? Work currently uses Ubuntu so I would assume this is a good OS to use. I do of course know how to use google, but the noise ratio is just too big, so thought I'd ask here, as I know many of you will have a ton of bookmarks. Cheers.

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• Weird files in User folder

  - by Vervious

  In my user folder (C:/Users/myAccount/) theres a set of interesting hidden files that I've never seen before (right now it's a fresh install of Windows 7 Ultimate). These are: NTUSER.DAT, ntuser.dat.LOG1, ntuser.dat.LOG2, and NTUSER.DAT(whole chain of numbers and letters).TM.bif, NTUSER.DAT(whole chain of numbers and letters).TMContaineretcetc.regtrans-ms, and another similar one. When I try to delete them, it says the system is using them. I've never seen these files before. Are they ok to delete? Or should I leave them in my home folder? I always keep "Show hidden files" as well as "Show System files" checked, since I prefer being able to see all the files on my computer. If I shouldn't delete them, is there at least a way to tidy them up a bit? Thanks.

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• Can't Remote into Windows Server

  - by Brian

  Hello, I have a Dell server wired into the router. I was able to connect to it with my laptop (laptop is wireless) before my router died. My verizon router went kaput, and I got everything else back up and running on the wireless network other than the remoting in feature, even though I can access the server through windows explorer just fine. Any ideas why? What do I need to check? UPDATE: Interesting scenario, Network Discovery is off; I turn it on and save, but for some reason, even after that, network discovery is turning itself off... no idea why that is happening? Thanks.

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• Using Zentyal to control several servers

  - by user1301428

  I am currently in the process of creating a home server, made up of several virtual machines, each running a different type of server (i.e. a file server, a multimedia server, a firewall and a print server as of now). Today I discovered this new software, Zentyal, which looks interesting for system and network administration. However, I haven't understood one thing: can it be used only with its preconfigured packages or can it also be used to control other servers running other programs (in my case, the four virtual machines)?. Also, would you suggest to use such a program or do you think it's better to control each server on its own?

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• What causes an MSI package to launch following application install

  - by Damo

  We have an application we have developed, it gets deployed via an MSI I built. The MSI has been used in many locations, on many different builds. On one customers site, on occasion we are seeing some odd occurrences of data from the registry going missing. The 'data' from some select registry keys disappears and we have little idea why. One interesting point is that the MSI installer for our application has been seen in passive mode during OS load / load of our application on stat-up. The MSI loads a progress bar then disappears, following this our application loads up. It has been noted that following this the data disappears from our registry. However I can't say these two events are absolutely linked, it could have been missing before this event. What causes the MSI for an application to launch way after initial installation. How can it be prevented (correctly)

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• Hiding a directory through the FAT table

  - by hennobal

  I've looked into the FAT file system, trying to find a way to make a directory hidden from view of the user. This has been done with malware previously, so it should be possible. The SpyEye trojan hid inside a directory C:\cleansweep.exe\ which was only reachable through the command line. I know deletion is possible by substituting the first character of the directory in the FAT table with 0xE5, but then it will not be accessible. Any ideas on how the scenario from SpyEye can be recreated? Any filesystem is interesting, but ideally FAT or NTFS.

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• Wireless slow, but very odd

  - by Logman

  I have a HP Pavilion dv6 laptop, internet through the wireless timeouts. Even though it connects fine to the AP/router. The computer had a virus (searchnu?) and I backed up the usual and restored the laptop to factory image. Problem is after the restore the internet through the wireless the same still... and connected via wired and everything worked fine. I was able to update the whole system. Internet worked perfect, speed great. But the wireless still was pitiful. Ping tests with wireless are interesting: Google= 18ms Gmail= 18ms Yahoo= 1023ms 8.8.8.8=30ms Microsoft= Request Timed Out Bing= Request Timed Out msn= Request Timed Out even though I get 18ms with google, the pages take a long time to load. Is this a root kit? is it the wireless card in the laptop?

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• Why are my log in times taking so long in Linux?

  - by Jamie

  In recent weeks, login times on my Ubuntu server have started timing out; both through SSH and the local command line console. Examination of the /var/auth.log yields nothing interesting. How can I diagnose long log in times on my Ubuntu server? I should mention, also, that no updates have been performed since the problem has started, and that the /, /boot/ and /usr/ file systems are mounted as readonly. [Edit] This is a stand alone machine, so it doesn't authenticate with Active Directory, LDAP etc. Also, the login prompt is responsive, as is the password prompt. Upon typing the password then CR, I'll timeout. After four a five tries, I will be able to login, although I'm worried this will start taking longer.

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• Mitigating the 'firesheep' attack at the network layer?

  - by pobk

  What are the sysadmin's thoughts on mitigating the 'firesheep' attack for servers they manage? Firesheep is a new firefox extension that allows anyone who installs it to sidejack session it can discover. It does it's discovery by sniffing packets on the network and looking for session cookies from known sites. It is relatively easy to write plugins for the extension to listen for cookies from additional sites. From a systems/network perspective, we've discussed the possibility of encrypting the whole site, but this introduces additional load on servers and screws with site-indexing, assets and general performance. One option we've investigated is to use our firewalls to do SSL Offload, but as I mentioned earlier, this would require all of the site to be encrypted. What's the general thoughts on protecting against this attack vector? I've asked a similar question on StackOverflow, however, it would be interesting to see what the systems engineers thought.

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• What does directory permission 'S' mean? (not lower case, but in upper case)

  - by Howard Guo

  I downloaded Eclipse, uncompressed it, did a few other things and all sudden I notice this interesting behaviour: ^_^ ~/Downloads > sudo chmod 0000 eclipse/ ^_^ ~/Downloads > stat eclipse/ File: 'eclipse/' Size: 4096 Blocks: 8 IO Block: 4096 directory Device: 801h/2049d Inode: 529725 Links: 9 Access: (2000/d-----S---) Uid: ( 0/ root) Gid: ( 0/ root) Access: 2012-11-22 19:54:57.752017352 +1100 Modify: 2012-09-20 18:16:26.000000000 +1000 Change: 2012-11-22 20:07:49.354016510 +1100 Birth: - ^_^ ~/Downloads > sudo chmod 0755 eclipse/ ^_^ ~/Downloads > stat eclipse/ File: 'eclipse/' Size: 4096 Blocks: 8 IO Block: 4096 directory Device: 801h/2049d Inode: 529725 Links: 9 Access: (2755/drwxr-sr-x) Uid: ( 0/ root) Gid: ( 0/ root) Access: 2012-11-22 19:54:57.752017352 +1100 Modify: 2012-09-20 18:16:26.000000000 +1000 Change: 2012-11-22 20:08:19.042016478 +1100 Birth: - What does 'S' permission mean to a directory? And why it doesn't let me get rid of it? Thanks.

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• How to nmot show any prompts when inserting a USB drive in Windows?

  - by jasondavis

  1) I just found a really interesting program that allows me to use a USB drive as a windows login key. It is called Rohos Logon Key. IF I remobve my USB drive/key from the PC then I can have the PC lock or hibernate or any other option, I have been looking for such a solution for many years but never knew one existed until this and it works much better then I imagined. I do have a couple minor issues though (im using Windows 7 pro). When I remove and then re-insert my USB key, windows prompts me with this dialog here... Generally when I get this I just click on "Continue without scanning" however I am looking for a solution to just make it not even show this at all, is it possible to disable it from showing? 2) I also get this dialog as well when I insert USB drives/key... Would it be possible to not show this as well or have it pick an option by default or anything really?

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• Advice for outdoor wifi hardware and topology

  - by Robot

  I haven't setup any wifi networks other than an access point or two at any single location, so I'd like advice on how to setup an outdoor/weatherproof network in an area approximately 150 feet by 200 feet. The interesting thing is there are a pair of pools in the middle of the coverage area. Here is a picture: blue is pool, green is coverage area, yellow is building with wired access. Can anyone advise me on weatherproof APs, antennas and placement for best coverage of the pool deck? I've looked at the Meraki stuff, but I'm thinking it's overkill.

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• "Tail" a logstash server query

  - by phatmanace

  Assuming I have a logstash server chocked full of logs being loaded regularly, is there a reasonably elegant way that I can tail the results of a continuously executing query on the logstash server and show this in a terminal window e.g some-special-logstash-command.sh | egrep -v "(searchword1|searchword2)" the idea being that the command pipes stuff out of logstash and to my grep query that filters and shows me the filtered output for. .. of course if there is a logstash command that can do the grep piece for me as well, then that works too :) motivation for doing this, is that assuming all of my events from my estate is being loaded into logstash, then would be nice to have a terminal window with a continuous tail of interesting events as they occur scrolling past the screen. -Ace

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• building a home server with a nas appliance [closed]

  - by user51666

  Possible Duplicate: Best way to build home NAS with redundancy I was hoping to get some ideas from folks here. I'm interested in building a home web server with a nas appliance. It would be primarily used for storing pictures, video. I want a networked storage device so I can have multiple devices access it wirelessly as needed from within our home and also I want the option to access from outside the house using a login/pw access. I'm also interested in customizing, building my own web pages as well. Preferably apache. Any preferences? Does anyone have an interesting, neat set up they can share? Thanks!

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• Pause Nagios reloading in web interface

  - by 2rec

  Is there any option how could I turn off reloading of web page in Nagios web interface? Many times I checked many services and I needed the webpage to stay static and don't reload. One solution come to my mind - turn off the whole reloading for a while. Problem is that other people are using it too and they may want it at the time I don't want it. If anybody know about any kind of workaround or solution, please don't hesitate to write an answer. ;-) EDIT (+ reaction to the first answer): Maybe there could be a better way how to do it instead of modyfying nagios core. Interesting is, that I tried to disable javascript, it refreshed. I tried to disable http refreshing, it refreshed anyway. Has anybody know how and where is the refresh implemented?

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• GitHub Not Accessible from Google Chrome

  - by KPthunder

  Whenever I try to go to GitHub through Google Chrome 11 I get the following error message: GitHub works perfectly fine in Firefox 4: This has been going on for a few weeks. This is a fairly new install of Windows (I don't even remember if I've successfully got on to GitHub on this installation with Chrome in the past). I don't even use GitHub for hosting my own code personally, but this has proven annoying in that I can't even access other people's projects through Chrome! Does anybody know what is going on here? An interesting side note: The Sight extension for Chrome doesn't work either! It worked on my old installation of Windows but not on this one. Is my Chrome installation just screwy? I've tried disabling certain other extensions but nothing seems to change.

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• trying to set up wireless router, failing

  - by j j

  Hi, I am trying to set up Netgear's wireless-n WNR2000 router, following their oversimplified 5- step process for plugging in wires, and I'm not having any success. It comes down to: once everything is wired and turned on in the correct order, all of the LEDs match the image they give of 'what should be lit up', but their setup disk still doesn't find the router. They have a site to set up the router manually, www.routerlogin.net, which I cannot navigate to, even while wired directly to the router. http://192.168.1.1 doesn't connect to anything, either. The interesting part: i get ping replies from Google's DNS server at 8.8.8.8 while this is set up. but cannot connect to any web site by name, since the router's DNS isn't set up. One thought is that the router and modem both have the same IP address, so it's conflicting, but I'm not sure how I'd resolve that. Any ideas?

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• How can I select a default interactive console in pyDev?

  - by dorian

  Using PyDev 2.7.1 in Eclipse 3.7.2, when I hit Ctrl-Alt-Enter to open a new interactive console, I get a dialog asking me what type of console I'd like to start ("Console for currently active editor", consoles for Python, Jython, Iron Python etc.). Now this selection dialog has no default entry and keyboard selection doesn't work, meaning that I have to use my mouse every time I need a new console, which is kind of tedious. I've checked Preferences - PyPev - Interactive Console, but found no interesting options there. Is there any possibility to define a default interactive console type so that I just have to hit Return when the dialog pops up or, even better, skip this question altogether?

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• Mail Secure & Stable Open Source Mail Server

  - by Fanar ALHAYALI

  I have asked question on http://stackoverflow.com/questions/9868426/i-need-to-know-which-email-server-i-have-to-use and someone tell me my question would be better on serverfault. I know that this is a common question and asked many times. but there are so many available mail servers that i am not able to decide the one. Kindly tell that which is the Secure, Stable and fast open source mail server for Centos or Redhat Server. Is there any guide which can be used to deploy the mail server with all its components e.g. smtp, pop3, imap, spam, calender server, antivirus, DNS Setting. Currently I'm using sun messaging V6 which installed on Solaris 10 and my boss ask me to make a report for the best mail server today in the marketing? I tried to have a look on Google but I couldn't find interesting information for my report. Any advice would be appreciated.

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• How can I prevent OpenVPN Client from blocking inbound connections while a tunnel is connected?

  - by joshudson

  We have this machine that we RDP into for using OpenVPN. When a tunnel is connected, it is not possible to RDP into the machine. Should we get disconnected, this is a problem (machine is headless). How can I stop OpenVPN from blocking inbound RDP? I do not have access to the server configuration. If there's anything interesting on the client to check you'll have to tell me how to get at it. I eliminated the possibility of routing issue before asking the question. Only inbound connections cannot be opened. Outbound connections to LAN can be opened just fine. EDIT: Don't bother answering. The problem disappeared without any known changes being made.

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• Can you convert an address to a zip code in a spreadsheet?

  - by moe37x3

  Given a column of street addresses with city and state but no zip in a spreadsheet, I'd like to put a formula in a second column that yields the ZIP code. Do you know a way to do this? I'm dealing with US addresses, but answers pertaining to other countries are interesting, too. UPDATE: I guess I'm mostly hoping that there's a way to do this in Google Spreadsheets. I realize that you need to access a vast ZIP code database to do this, but it seems to me that such a database is already inside Google Maps. If I put an address in there without ZIP code, I get back an address with ZIP code. If Maps can do that lookup, maybe there's a way to make it happen in Spreadsheets, too.

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• "Meet in the middle" with SSH

  - by stillinbeta

  I have an interesting question regarding SSH. I have a machine at school that I'd like to be able to access from elsewhere. It's behind a firewall/NAT, so I can't get at it directly. I have a leased web server that I can SSH into from anywhere. I was wondering if I could do some voodoo with port forwarding to get to my machine at school via the web server. I think this comes down to whether you can do SSH "backwards," which may or may not be possible. Basically: Machine A can access Machine B Machine C can also access Machine B How can Machine A access Machine C?

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• Playing games over RDP and utilizing other res of powerfull PC... [closed]

  - by Alex

  Possible Duplicate: Is it possible to run games over remote desktop? Hey guys, I have the one question..that may be not usual but very interesting.. Well, I have laptop and some powerfull PC, now I want to utilize ALL energy of the powerfull PC on my notebook.. for example, run games like F.E.A.R on powefull PC and next play it over the Remote Desktop on my laptop.. both PC may be connected lan < lan, or thru Wi-Fi, or FireWare, or (?) any other way that does not matter.. Google told me that it won't work over RDP due to protocol lacks and there should be many bump on the road on that way.. but, maybe , you guys will give me the right point ? Let's formalzie.. we'd like to utilize all resources of one PC on another PC via network, how we should do that ? Any ideas?

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