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• What is the best resource or method for learning more about servers and networking?

  - by kaleidomedallion

  I can get around a server to some degree, but everything I have learned has been as I have needed to learn it. Every once in a while I will learn about some new command that will revolutionize how I think about systems and networking, and realize how I could have been using it this whole time if only I had known about it. Anything to bring someone from novice to some kind of fluency? Do I just need to earn the battle scars bit by bit over the course of years? (I mean of course I do but what can I do to help it be not quite so painful?) For instance, I am still fuzzy on all of networking. Any help would be greatly appreciated.

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• Should Starting a Quick Game via Google Game Services be Iterated?

  - by user46727

  I have been following this tutorial for Google Play Game Services. I am a little unclear as to if the room matching algorithm should be looped or not. Can I just initialize this process once and let it time out? Or by iterating through it is it somehow rechecking it? If anyone had the approximate timeout that would be great as well. The problem stems from the fact that even when both phones are signing into the Game Services (at virtually the same time, my friend and I logged in), the room is not registering multiple people. One time my friend's phone even entered the game map, showing that he somehow was able to progress from the room initialization process. Relevant screen update methods which I am starting this matchmaking process: @Override public void update(float deltaTime) { game.options.updateTiles(); if(!isInitiated) { startQuickGame(); } } private void startQuickGame() { // auto-match criteria to invite one random automatch opponent. // You can also specify more opponents (up to 3). if(game.mGoogleClient.isConnected() && !isInitiated) { Bundle am = RoomConfig.createAutoMatchCriteria(1, 3, 0); // build the room config: RoomConfig.Builder roomConfigBuilder = RoomConfig.builder(Network.getInstance()); roomConfigBuilder.setMessageReceivedListener(Network.getInstance()); roomConfigBuilder.setRoomStatusUpdateListener(Network.getInstance()); roomConfigBuilder.setAutoMatchCriteria(am); RoomConfig roomConfig = roomConfigBuilder.build(); // create room: Games.RealTimeMultiplayer.create(game.mGoogleClient, roomConfig); // go to game screen this.mRoom = Network.getInstance().getRoom(); if(this.mRoom != null && this.mRoom.getParticipants().size() >= 2) { game.setScreen(new MultiGameScreen(game, this.mRoom)); isInitiated = true; } } else { game.mGoogleClient.connect(); } }

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• MySQL server hangs after approximately 1 month (CentOS)

  - by user25061

  Hey guys, I've got a web server running Apache/PHP and MySQL (CentOS), and MySQL seems to hang once every month or so. As far as I can tell, there are a few slow queries that are being resolved, but other than that I can't really see any reason why MySQL would hang. I'm having problems determining the problem - nothing is showing up in /var/log/mysqld.log, and again there are a few slow queries, but nothing out of the ordinary. Load is average at the time of the crashes... Can I please get some hints on how to work out the issue? I can't reproduce on our staging environment, so I'm a little stuck.

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• Browser keeps being really rude to me today

  - by j-t-s

  Hi All I've had this problem only once before, years ago. I bought a new computer the other day and last night I visited a website which Google Chrome suspected was an insecure site. So I proceeded to view the page anyway (Stupid, I know... But I was curious), and all of a sudden the window closed and ever since, every few minutes either Google chrome or Internet Explorer keeps popping up with random websites, most of which are porn-related sites. I have downloaded ZoneAlarm, IOBit 360, Eset Smart Security and none of them reported any problems. I still have the rube browser problem. Can somebody please suggest any software/ways to fix this? (Other than to reformat please :)) Thank you :)

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• How can I do a bulk caller ID lookup (reverse phone lookup) on a list of phone numbers?

  - by rob

  I have a tab-delimited text file with all of the phone numbers I've called or received calls from in the past year. The phone numbers are all based in the US, so the format is ###-###-####. For tax purposes, I need to know which calls were personal and which ones were business-related. I could enter them all one-by-one into Google, but that will take forever because there are hundreds of numbers to check. Is there a program, MS Office plugin, or website that I can use to look up all of the numbers at once? If not, is there some way to create an Excel macro to do the lookups for me?

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• Sync Linux to Windows 2003/2008 Natively

  - by user26753

  Without using any external packages for Windows, can Linux synchronise it's clock to a Windows 03/08 Server natively? I've tried it using various NTP packages for Windows but would like to use just Windows software for this. EDIT: I've tried the below however it doesn't work. I've put TimeSource in /etc/hosts, stated server TimeSource in /etc/ntp.conf however when I do a service ntpd start it doesn't sync (it's 3 minutes out at the minute). I then stopped the NTPD and did a ntpdate TimeSource, thinking it would sync and then I'd start the NTPD once it's got the time, and it says: no server suitable for synchronization found. Though I can ping it. Any thoughts?

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• Apache spawning one process a day, what causes it?

  - by xtrimsky

  I have a PHP server running, with cron jobs etc... And once a day (between midnight and 3am), apache spawns one process that never ends. The server is a virtual server, so in a couple of days it eats up the whole memory. Is there a way to figure out what is crashing ? What php script isn't finishing ? Or what url via apache was triggered ? I have tried looking on the access logs, errors logs, but didn't find anything unusual. Thank you

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• How does process of updating code with Continous Integration work?

  - by BleakCabalist

  I want to draw a model of process of updating the source code with the use of Continous Integration. The main issue is I don't really understand how it works when there are several programmers working on various aspects of the code at the same time. I can't visualize it in my mind. Here's what I know but I might be wrong: New code is sent to repository. Continous Integration server asks Version Control System if there is a new code in repository. If there is than CIS executes tests on the code. If tests show there are problems than CIS orders VCS to revert back to working wersion of the code and communicates it to programmer. If tests are passed positively it compiles the repository code and makes new build of a game? New build is made not after ever single change, but at the end of the day I believe? Are my assumptions above correct? If yes, does it also work when there are several programmers updating repository at once? Is this enough to draw a model of the process in your opinions or did I miss something? Also, what software would I need for above process? Can you guys give examples for CIS software and VCS software and whatever else I need? Does CIS software perform code tests or do I need another tool for that and integrate it with CIS? Is there a repository software?

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• Why don't windows of the same application behave as they should in Oneiric?

  - by Yuttadhammo

  Somewhere along the upgrade path, Unity has developed some strange logic behind window layering. First, before Oneiric, there was a way to see all the windows of an application - I think it was when you click on the icon in the launcher. Now, clicking on the icon often does nothing. Suppose I have two terminals open, one behind this Firefox window, and one in front of it. Clicking on the launcher does nothing - the only way to find the second terminal, afaics, is to move the Firefox window or use the task switcher (which has a whole slew of problems of its own). Secondly, once I have both terminals on top, then I decide to close one of them, suddenly they both disappear (the second one, for some reason, has gone into hiding behind the Firefox window). Third (though I can't pin it down now), sometimes when a window is on top, focus is still on a window in back; I click on the top x to close the window in front, only to find I've closed an important window in the back. I can't really believe these are bugs, since they seem too obvious to not have been fixed by now. My question is, am I missing something? Some compiz option I can set to make it act like it used to? Or is this really how Unity is supposed to act?

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• Sudo asks for password twice with LDAP authentication

  - by Gnudiff

  I have Ubuntu 8.04 LTS machine and Windows 2003 AD domain. I have succesfully set up that I can log in with domain username and password, using domain prefix, like "domain+username". Upon login to machine it all works first try, however, for some reason when I try to sudo my logged in user, it asks for the password twice every time when I try sudo. It accepts the password after 2nd time, but not the first time. Once or twice I might think I just keep entering wrong pass the first time, but this is what happens always, any ideas of what's wrong? pam.conf is empty pam.d/sudo only includes common-auth & common-account, and common-auth is: auth sufficient pam_unix.so nullok_secure auth sufficient pam_winbind.so auth requisite pam_deny.so auth required pam_permit.so

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• How do i know if i set up the nlb (network load balancing) cluster correctly???

  - by letseatlunch

  So ill start from the very beginning. I'm working on a web conference were we are going to show about 12 videos for a total of about half a gig for all 12. Since all the participants are going to be watching (and also streaming/downloading) at once it was recommended we set up a server farm. So i have 4 servers that i am trying to network together. They are all running Microsoft Server 2008 and i have spent the last three days setting them up and now that its done i want to make sure its all ready to go. so i just want to be sure that everything is setup the way that i think it is. What is the best way to do this. Really i want to make sure that the load will be split over the servers when its showtime. thanks for any help in advance letseatlunch Dave

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• How to set a low process priority for everything spawned from a command prompt in XP?

  - by Binary Worrier

  As a developer, once or twice a week I run a full build on my XP dev machine. This will run at 100% cpu for 30 or 40 minutes, making my machine usless for anything other than basic browsing & email. Is there anyway I can specify that for a given process (i.e. a command prompt) it and any process spawned by it will hae a lower priority, say taking up no more than 60 - 70% of CPU, leaving my machine more usable. I don't mind the build talking 30 or 40% longer, if I still have use of my machine while it's running. Thanks BW P.S. I'd love to be able to throw more hardware at the problem, but that isn't under my control.

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• Why Netbeans 6.8 remote project (php) uploads all files by default

  - by xaguilars

  Hi I wanted to know if there's some option for disabling Netbeans to upload all files of a recently imported remote (php) project. I always check "Upload files on run", in the project configuration. But when I click on run Netbeans selects all files by default (I modified only some). The file checkboxes cannot be disabled at once and you have to do this one by one (imagine you have 5000 files...). That's annoying. Do you know any solution? thank you

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• Dual boot 12.04 and W7 - keybaord and screen not responsive

  - by Saariko

  I installed 12.04 using WUBI on a working W7 64bit system. both KB and mouse work perfect during the BIOS boot, and on the bootmgr, I can select Windows 7 or Ubuntu to load. Once I select Ubuntu, the KB and mouse seem to loose their power (light on the mouse and Numlock leds go off) After couple of seconds, the screen gets blurry. The screen pops back at the Ubuntu login screen, the mouse gets activated (light works, as well as mouse pointer is moving) However, the keyboard is not responsive to any click, nor does any icon on the login screen. - Using the mouse, I can't select the virtual keyboard, nor the shutdown icon - like it's not accepting any mouse clicks. The following Q&A didn't answer: Keyboard not responding at login with 12.04 dual boot on toshiba satellite L775 which links to a post on the web I also tried 12.04 - Windows 7 Dual boot - not responding to keyboard in boot menu - that goes beyond the login screen, but still didnt' assist me. It's a wired USB KB The board is an Intel board, and there isn't even a PS/2 connection anymore. Tried moving around the USB's Tried removing the Mouse, and only have the KB. Neither helped.

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• NetworkManager detects no networks with a RTL8188CE

  - by Cormac O'Brien

  I'm on a 2011 Lenovo Thinkpad T420i with a Realtek RTL8188CE WiFi adapter. Here's the scenario: I pop in the Ubuntu LiveCD to install. Laptop detects all networks in range, I connect to my home network, internet working great. Once Ubuntu finishes installing, the home network I am connected to is the only one which appears in the applet list. Upon restarting or waking from suspend, NetworkManager does not detect any networks – it simply displays "Disconnected" under the Wireless Network section of the menu. I am able to connect to my home network by using the "Connect to Hidden Wireless Network" option and it works immediately. I have yet to test if this works with other SSIDs. I have tried reinstalling the entire OS as well as NetworkManager and my wireless drivers. For hardware info, I ran: cormac@cormac-T420:~$ sudo lshw -c network Here is the output for my wireless card: *-network description: Wireless interface product: RTL8188CE 802.11b/g/n WiFi Adapter vendor: Realtek Semiconductor Co., Ltd. physical id: 0 bus info: pci@0000:03:00.0 logical name: wlan0 version: 01 serial: d0:df:9a:08:73:50 width: 64 bits clock: 33MHz capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless configuration: broadcast=yes driver=rtl8192ce driverversion=3.2.0-26-generic firmware=N/A ip=192.168.1.138 latency=0 link=yes multicast=yes wireless=IEEE 802.11bgn resources: irq:17 ioport:5000(size=256) memory:f2500000-f2503fff I can provide more information if required. This was not a problem in Natty or Oneiric. I hope this can be fixed, I don't want to have to ask for an SSID wherever I need to connect.

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• Vista Startup - Cannot Find the File Specified

  - by Redmastif

  Yesterday I restarted my laptop because my Wi-Fi catcher wasn't working correctly, and when the computer reached the login screen, instead of showing my user account it said "Cannot find the file specified". I rebooted and ran the Startup Repair and Memory Diagnostics but nothing showed up. I also took the battery out for a minute and tried again but still no luck. The weird thing is that I cannot even boot into safe mode, it still shows the same error. I don't remember downloading or opening anything suspicious recently, and I have 3 different cleaners/anti-malware programs as well that I usually run about once a week. I did go into the registry recently but I didn't modify or delete anything as I was only checking to see if I had a certain key in it. I have a Dell laptop running Vista Home Basic SP2. If I have to I can reinstall the OS with the CD or even take it to Best Buy but I'd rather try and fix it first. Thanks.

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• Why is execution of batch files different between drag & drop and from command line?

  - by Dharma Leonardi

  Ok, so I've been trying to figure this out for hours with no progress. I have created a batch file to get details of a VHD. Everything runs fine and produces the expected results when run from the command line in a command prompt. However, when I use drag and drop from file explorer (dragging a vhd file and dropping onto the batch file) the batch file runs without errors but the output (VHD.INFO) is empty. I'm stumped. Edited to only include the behaviour: @echo off cls setlocal enabledelayedexpansion set "_PATH.THIS=%~dp0" echo HELP | diskpart > %_PATH.THIS%OUTPUT.TMP TYPE %_PATH.THIS%OUTPUT.TMP PAUSE To demonstrate the different behaviour, please run the batch file from the command line once (works) and also run the batch file by double clicking in file explorer (failure in all piping commands).

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• Should we regularly schedule mysqlcheck (or databsae optimization)

  - by scatteredbomb

  We run a forum with some 2 million posts and I've noticed that if left untouched the overhead in the mySQL (as listed in phpMyAdmin) can get quite large (hundreds of megabytes). I'm wondering if scheduling a normal mysqlcheck to optimize the tables is good practice? Any reason not to do it, say, once a week at an off-peak hour? There was a time over the summer where our site was constantly crashing because mysql was using up all resources. That's when I noticed the huge amount of overhead and optimized the database and haven't had any problems since then with stability. I figured if that was helping alleviate the issues, I should just setup a cron to automatically do this.

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• Latest (5 June 14) Updates t0 10.04 Causing Multiple Problems

  - by user291780

  Apologies, the questions are very short, but the bkg isn't. I rec'd a routine notification from the update mgr a few days ago (I believe, June 5th). I took a look and there was lots of linux stuff, headers, etc., nothing obviously unusual. I'd rec'd and updated w/a more extensive pkg set, kernel and all a few weeks ago, no problem. On June 6, I pushed the upgrade button on the June 5th batch, nothing usual, needed a reboot, which I did after a full power down, it came up fine. Gedit worked, the calculator worked, started up firefox, it came up, selected the BookMarks menu, and blam, it hesitated and then greyed out, when I tried to close it, got the "process not responding" msg. Undaunted, I tried to fire up Google Chrome....nothing on the screen or process bar. I fired up the system monitor and indeed there were some "sleeping" chrome processes "running". Powered down several times, but the same problems persist. Similar but worse story when I tried to fire up one of my virtual machines, VirtualBox came up fine, but when I tried to start one of my virtual machines I got a progress popup that I'd never seen before which showed that we were making no progress past 20%. Uninstalled Oracle VirtualBox, reinstalled the latest and greatest, same result. Also, unable to logout, or shutdown once the virtual machine exhibited this behavior. Powered down manually, end of story. Never saw such a bad result after an update. I'm running Ubuntu 10.04 LTS (Lucid Lynx) as I have been for a number of years. Please don't reply with why don't you run some other version of Ubuntu, that doesn't answer the questions below. Questions: Will their be a subsequent update that fixes this, and if so, when? If not, is there a way for me to get back to where I was before this disaster?

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• Lock manager stops responding (lockd/nfslock), but shows as running

  - by dwaynehoov

  Essentially, lock manager stops responding (lockd/nfslock), but shows as running as a kernel process. If I bounce portmap and nfslock, it has no effect. Doesn't show up in the portmapper registered services rpcinfo -p .. doesn't show nlockmgr. it just shows portmapper and status If I manually remount the drives, it fixes the issue. I'm assuming that the service (lockd) goes stale or hangs when there is no NFS activity? It seems like issuing a mount for NFS volumes "awakens" it and things work once that happens. Please help me nail this down for point me to somewhere to get more information on what might be happening. System info: Linux xxx.yyy.com 2.6.32-300.38.1.el5uek #1 SMP Thu Oct 18 11:51:13 PDT 2012 x86_64 x86_64 x86_64 GNU/Linux cat /etc/redhat-release Red Hat Enterprise Linux Server release 5.8 (Tikanga) cat /etc/oracle-release Oracle Linux Server release 5.8 Thanks

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• Remotely initiate windows updates

  - by TetraFlash

  I have a network with countless workstations on it and the windows updates are done through WSUS in push cycles to allow us to use a generic image and configuration and avoid network congestion. I have a number of workstations in storage that are connected once a month for a few days to recieve updates, however not all of them fall within their push cycle. I want to avoid going to each machine and clicking "check updates" as that would require me to connect a monitor, mouse and keyboard. Is there a way (preferably through powershell but im open minded) to initiate a check and install of updates on a remote system? Lets say for 1 system at a time right now, I can add a file reader and a look later. NOTE: the configuration of the WSUS server is above my pay grade, im simply being asked to ensure these machines are updated. Thanks for any help or hints

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• Why do I need to add my application pool identity to the IIS_IUSRS group?

  - by smcolligan

  I'm setting up a .NET v4.0 web application on a Windows 2008 R2/IIS 7.5 server that uses a domain account for the application pool identity. When I access the site, I get the following error: The current identity () does not have write access to 'C:\Windows\Microsoft.NET\Framework\v4.0.30319\Temporary ASP.NET Files' According to this: http://learn.iis.net/page.aspx/140/understanding-built-in-user-and-group-accounts-in-iis/ the identity of the worker process is added to the IIS_IUSRS group when the process starts. This seems to work fine for the existing .NET v2.0 applications I have running on the same server (I have not had to add their domain account application pool identities to IIS_IUSRS group). This does not seem to be the case for the first .NET v4.0 web application I'm setting up. Once I add the identity to the group, everything works fine. I suspect something is not configured correctly that is forcing me to do this. I would like to understand this before rolling out more sites/servers. Thanks in advance for your help...

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• Windows W8, L8 and now H8

  - by raccoon_tim

  Windows 8 is having to endure with a lot of headwind at the moment. The weather forecast doesn’t appear to improve in the near future either with prominent game developers and publishers taking to the barricades accusing Microsoft of building a closed ecosystem. I am forced to side with this opinion as I too see services the likes of Steam as playing an important role in the gaming world, which just happens to be an industry that cannot be sidelined. What Microsoft is attempting to do is merge the PC and mobile markets. The Windows Marketplace is to be the only place where you can purchase Windows applications in the future starting now with Metro apps. This is what Apple, Google and Microsoft have been doing with mobile devices for some time now and it’s what we have all come to expect. The PC market is different, however. It has always been open, which has resulted in a diverse market allowing for third parties to build successful distribution and marketing networks. You could argue that Microsoft is just doing something that Steam has been doing for a long time now but the difference is that Microsoft would own both the marketplace AND that operating system, which would eventually give it dominance over the whole Windows application distribution network. Currently there is no real alternative to Windows in the PC gaming world but I would expect to see Mac OS and Linux getting more popular if Microsoft does not notice the signals coming from the gaming industry and choose to once again open up the markets on the PC.

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• Use the &ldquo;using&rdquo; statement on objects that implement the IDisposable Interface

  - by mbcrump

  From MSDN : C#, through the .NET Framework common language runtime (CLR), automatically releases the memory used to store objects that are no longer required. The release of memory is non-deterministic; memory is released whenever the CLR decides to perform garbage collection. However, it is usually best to release limited resources such as file handles and network connections as quickly as possible. The using statement allows the programmer to specify when objects that use resources should release them. The object provided to the using statement must implement the IDisposable interface. This interface provides the Dispose method, which should release the object's resources. In my quest to write better, more efficient code I ran across the “using” statement. Microsoft recommends that we specify when to release objects. In other words, if you use the “using” statement this tells .NET to release the object specified in the using block once it is no longer needed.   So Using this block: private static string ReadConfig()         {             const string path = @"C:\SomeApp.config.xml";               using (StreamReader reader = File.OpenText(path))             {                 return reader.ReadToEnd();             }         }   The compiler converts this to: private static string ReadConfig1() {     StreamReader sr = new StreamReader(@"C:\SomeApp.config.xml");       try     {         return sr.ReadToEnd();     }     finally     {         if (sr != null)             ((IDisposable)sr).Dispose();     }   }

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• How to prevent boot manager missing after cloning a win764 image using Ghost 2003?

  - by hirogen

  I am running ghost 2003 command -fdsp, but once we have cloned the image and restored it onto exactly the same make and model machine, we are force to run win7 setup and run a repair which fixes the boot menu, I want to prevent this requirement to fix the problem, any suggestions besides the obvious of using Windows AIK tools, new versions of ghost/clonzilla. I want to prevent the problem in the first place, it's 1 partition only, on a levano workstation m82 with UEFI and a 100mb system reserved partition. Windows Boot Manager screen and states: Windows failed to start. A recent hardware or software change might be the cause. To fix the problem: 1.Insert your Windows installation disc and restart your computer. 2.Choose your language settings, and then click "Next." 3.Click "Repair you computer." If you do not have this disc, contact your system administrator or computer manufacturer for assistance. Status: 0xc000000e

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