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• Tell the kernel to strongly cache a particular directory

  - by silviot

  This question is a rephrasing of Optimizing EXT4 performance. I have a directory that contains build files, most very small, but totaling 5.6G. I usually access the same subset of files (some thousands, for some tens of megabytes) over and over again. The subset changes daily (different projects, different versions of libraries). What takes longer when I use it seem to be disk seeks. For example if I do a du twice the second time it takes as much time as the first, and disk activity is similar. Ideally I'd like to tell the kernel to allocate X Mb to the metadata and Y to data in the folder, like the options for nfs cache. Is it possible in some way, other than mounting nfs from localhost and caching it to a ramdisk?

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• Ask The Readers: What’s Your Favorite Co-Op Game?

  - by Jason Fitzpatrick

  For many readers, the weather is getting chillier and that means more time indoors. What better time to take a look at the best co-op games around? Jump in and put in a nod for your favorite game and setup. Wallpaper available here. Whether you’re playing DS-to-DS with your spouse, inviting all your buddies over for a whole-house LAN fest, or couch co-op’ing through your favorite RPG, we want to hear all about your favorite games and the ways you play them. Sound off in the comments with your co-op tips and tricks; make sure to check back in on Friday for the What You Said roundup to find some new titles to tide you over until the warm weather comes around again. How To Get a Better Wireless Signal and Reduce Wireless Network Interference How To Troubleshoot Internet Connection Problems 7 Ways To Free Up Hard Disk Space On Windows

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• How to Automatically run two commands after login?

  - by Covi

  I have these two commands that I need to manually run every time after login: autossh -M 2000 -N -f -q -D 127.0.0.1:7070 [email protected] and sudo mkdir /media/C sudo mount /dev/sda2 /media/C I'd like to make them automatically run every time I boot and login to my computer. I'm currently using 10.04LTS. BTW, I only vaguely know what init.d or runlevel mean. But I still prefer to know a command-line based way to achieve this, not a fancy GUI way. Also, the autossh will only succeed after Ubuntu automatically detect and connect to my network, so should we let it retry infinitely until successfully executed? Thank you!

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• Oracle RightNow Cloud Service Roadmap - Live Webcast, Nov 13, 6pm CET

  - by Richard Lefebvre

  Did you miss out on Oracle OpenWorld this year? Then make sure you don’t miss out on this Webinar.  The Oracle RightNow development team shares the latest innovations and integrations, including future roadmap, for the Oracle RightNow Service Cloud platform.  Find out how these innovations will help you deliver exceptional customer service to your customers.Join our live Webcast on Wednesday, November 13, 2013, 09:00 a.m. PT / 12:00 p.m. ET (18:00 p.m. CET) to get up to speed with the latest updates and future capabilities, and learn how you can: Provide a more engaging Web experience Increase the effectiveness of assisted service Deliver the right answer at the right time - all the time Agenda Topics How RightNow fits into Oracle's vision for Oracle Service The latest updates to the Oracle RightNow Cloud Service platform Oracle's key investment areas and roadmap for Oracle RightNow Cloud Service Don’t miss this chance to learn how you can delight your customers while improving cost and efficiency.Register Now

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• Two users sharing the same computer

  - by Pitto

  I need to share my pc with a friend of mine living in India. His pc is a p4 and he needs a bit of horsepower for calculation. Since I have an i5 I thought to let him vnc and use it but this would not allow me to use the computer at the same time. Is there a way to use the computer at the same time with different users? I've read Xorg is able to do this but I am not sure is the best solution nor I can implement it. We have Ubuntu 12.04 64bit on the i5 side and Ubuntu 12.04 32bit on the p4 side. Thank you for your kind help.

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• HD 6770M low graphics mode after update (AGAIN)

  - by Pihkal

  I have Ubuntu 12.04 LTS (re)installed on this laptop: I've also installed the fglrx-drivers for my ATI card (using apt-get),it appeared to work fine,that is until i updated my distro. Once again i got the "low graphics mode" error when i booted into the new kernel,booting in the old kernel works fine however. When i look into the logs i see "no screen found". This is the second time i install Ubuntu and the second time i run into problems with my graphics. Reinstalling isn't a solution since the problem keeps comming back. My question now is: does anyone know a REAL solution for this issue ar at least knows what's causing it? Any help would be greatly appreciated.

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• VB 2010 LOGIN 3-TIMES LOOP [migrated]

  - by stargaze07

  How to put a loop on my log in code it's like the program will end if the user inputs a wrong password/username for the third time? At this point I'm having a hard time putting the loop code. This is my LogIn Code in VB 2010 Private Sub btnLogIn_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnLogIn.Click Me.Refresh() Dim login = Me.TblUserTableAdapter1.UsernamePasswordString(txtUser.Text, txtPass.Text) If login Is Nothing Then MessageBox.Show("Incorrect login details", "Error", MessageBoxButtons.OK, MessageBoxIcon.Error) Else Dim ok As DialogResult ok = MessageBox.Show("Login Successful", "Dantiña's Catering Maintenance System", MessageBoxButtons.OK, MessageBoxIcon.Information) MMenu.Show() MMenu.lblName.Text = "Welcome " & Me.txtUser.Text & " !" If txtPass.Text <> "admin" Then MMenu.Button1.Enabled = False ProdMaintenance.GroupBox1.Visible = True MMenu.Button2.Enabled = True MMenu.Button3.Enabled = True MMenu.Button4.Enabled = True Else MMenu.Button1.Enabled = True ProdMaintenance.GroupBox1.Visible = True MMenu.Button2.Enabled = True MMenu.Button3.Enabled = True MMenu.Button4.Enabled = True End If Me.Refresh() Me.Hide() End If End Sub

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• Reading the memory of a N64

  - by toazron1

  I'm looking for a way to read the memory of a N64, while the game is running, in real time. I have a c# program which hooks into the memory of a running emulator and tracks SSB64 stats. I want to do the same thing with the physical N64. Currently it is possible to read the memory with a gameshark pro, however it's extremely slow, buggy, and not practical for what I am trying to accomplish. Would it be possible to tap into the gameshark, or the N64 directly, to access the memory in real time? Thanks!

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• Player position triggering teleports

  - by jSherz

  I'm developing a Minecraft plugin (bukkit) in which a server admin can create 'portals' - a small region that will teleport any players who enter it. I have the teleportation sorted and I know how I could define areas that the player's position could be tested against. This would involve an ArrayList containing the zones and then hooking the PlayerMoveEvent so that the ArrayList is searched each time for a matching portal region. Although this method would work, I doubt that it would be very efficient when 100+ players are all moving around at the same time. Is there a better way of checking a player position against a set of 'zones' / regions?

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• How to create a Request Specific Thread Safe Static int Counter?

  - by user960567

  In one of my server application I have a class that look like, class A { static int _value = 0; void DoSomething() { // a request start here _value = 0; _value++; // a request end here } // This method can be called many time during request void SomeAsyncMethods() { _value++; } } The problem is SomeAsyncMethods is async. Can be called many times. What I need when a request start set _value = 0 and then asynchrosnously increment this. After end of request I need the total. But the problem is that another request at the same time can access the class.

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• Firefox released beta 9 for version 4

  - by anirudha

  Firefox yesterday released 9 beta of Firefox 4. now many plug-in work inside Firefox 4. How to get plugin work in Firefox 4 :- if you like any plug-in who you like to use but not worked in Firefox 4 go to developer site may be they work on them so it’s chance you can get the version who is in development from developer site. because many of plugin wait for a time period for testing or making same version for all plateform like linux or mac osX. How to work with stable and Beta version [standalone] sometime we fell that it’s time wasting because something we need the beta version can’t give. so you can use Firefox 3.6.13 or Firefox 4 both by a trick. you need to install them in other directory. when you trying to install another version beware because they also override the last installation directory so you need to choose the directory where you want to get another version manually.

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• How can I make apt-get wait for another instance to finish?

  - by rajagenupula

  Is there any way I can make apt-get wait for the other apt-get (or similar) processes to finish? I know that, generally, apt-get can only one instance at a time and if we try to run apt-get at the same time then we get a message saying that some other process is using it. My question is: how can I make apt-get wait for the other processes to finish and then run? Advantage: No need to type the command apt-get again, it will be automated after the 1st apt-get finishes.

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• Programming tourism

  - by Andrew_B

  I'm going on vacation to Paris, France for 10 days. Actually, it's my girlfriend's wish to go there but I'm not very interested in visiting, sightseeing, etc. Recently, I came up with an idea of trying to do something like programming tourism. :) I'd like to do something related to programming in a startup-like company. I do not want a salary or any kind of compensation. I want to overview process, social aspects, environment and "what it feels like" to development software in another country. I'm from Russia. I've been a software developer since 2003. I prefer C#4 but I'm ready to use anything Turing-complete. I have some MS certifications and am familiar with all .NETs since 1.1. Currently I'm finishing PhD in CS. I'm interested in multidimensional indexing and I can turn any piece of data and code to OLAP system. :) But it'd take too much time. What can I do? I have no more than one week. I want a totally complete project in a short amount of time. Implement some features in well-tested project Do a code review Debug memory, performance and concurrency issues Do unit testing So, about the questions: Is it legal? I'm ready to sign NDA if it's necessary. I'll have tourist visa. Is it possible? I'm really sure that bureaucratic companies with lots of HRs and PMs will not allow such experiments. But small companies can afford it. I'm ready to guarantee support on my code after leaving home :) P.S. I still havn't started learning French :) I hope it will not take too much time :) P.P.S. Yes, it's girlfriend-approved. What's in it for me? It's fun. It's fun to see new systems and people who created them. It's fun to complete meaningful things. Quickly. What's in it for them? Feature, debug, review or test. If my short-term colleagues will like this style of working I can invite them to make same trip into my company :) I think in Russia it's even more exciting :)

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• Installed thinkfan, should I keep it?

  - by FRC

  Well I did fixed my overheating problem on my Lenovo T500 with Ubuntu 12.04 LTS. At the same time I did install Thinkfan. But since I have a solution for overheating now, I would like to know if there is any really good reason to keep it? My fan speed without it was cca 3000 RPM. When it installed droped to 2500RPM in idle time. Thinkpad have very quiet fans, so I don't really hear the noise when is on 3000RPM (no difference between 2000 or 3000 RPM). Is it better for processor to have more air or more air brings just more dust? Silly question but I would REALLY want to know the reason of keeping thinkfan.

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• Where to start when digging into an existing J2EE codebase?

  - by Jacob Krustchinsky

  I work for a company that produces enterprise applications to be used by schools and districts to manage all of their tests and standards data. Their existing application is written in J2EE and is very large. I personally am a seasoned PHP and Ruby = RoR developer and I have been asked to attempt to implement easily added but crucial features to an existing J2EE codebase. I am very familiar with Java SE and know the architecture of a web application well. What I am asking for is, will this suffice for the task ahead and what tips can you give me in digging into the code base and actually efficiently adding these new features? Is there anything important I need to know before beginning and what can I expect in terms of problems and issues coming from a Java SE, PHP, RoR background? Time isn't too much of an issue, I should have plenty of time to familiarize myself with J2EE.Please also note, syntax will not be a problem here.

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• Unity 3D in 11.10 with VirtualBox in OS X?

  - by Roshambo

  I'm having a horrible time with Unity 3D in Ubuntu 11.10 running in a VirtualBox VM in OS X. Such a hard time, in fact, that I'm about to give up and conclude that it simply isn't possible to use Ubuntu 3D in a configuration like this. The problem with is that windows simply do not render. I've found that killing Nautilus makes the problem go away, but that's really not much of a solution. I have installed the guest additions and am running the VM with 2048 MB RAM, 128 MB video memory, and have enabled 3D acceleration. I've tried all this on several Macintoshes, with no luck. Unity 2D, on the other hand, works fine across the board. Any advice or experience would be greatly appreciated.

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• MVC Coding Style Best practices

  - by user1378680

  I'm trying to learn how to code in MVC ... Normally what i do most times is that I write all the codes first, then break out the functions.. Have the functions into a seperate file and include it at the top of the page when I need it. 1) This method seem to work for me, although that means i require more time to make out the functions. Is this normal for learners.? 2) When I'm doing MVC : Model - contains all the functions and it's included in the view View - This has to do with the display of the whole app What is the use of Controller? Thanks for you time and patience. I most appreciate it. My language prefrence is PHP with MySQL

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• LXDE will not suspend when laptop lid is closed, and will die when woken up

  - by user46061

  I am not an experienced Linux user, although I have been using Ubuntu occassionally some time already. ( Since Feisty Fawn probably? ). Now I installed Ubuntu 11.10 and it is nice ( well, after I installed LXDE, Unity sucks and I didn't really like gnome-fallback-session ), but it has one problem: After being suspended, when I wake my computer up, it starts up and in about 5 seconds it dies. Like a normal shutdown. Then, when I start it again, the screen stays blank, so I have to hard-turn it off - only then, when I turn it on, it works. It is an MSI laptop, about 3-4 years old. The second problem is: After installing LXDE, when I close the laptop lid, it does not suspend. I can only suspend using the shutdown menu - and the waking up problem remains. Many thanks for your time and advice guys.

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• How to enjoy Firefox with their lot&rsquo;s of version.

  - by anirudha

  many developer want to use many version of a application. Firefox have not facility to stand alone installation but here is a trick to enjoy their nightly and stable version both. make a folder anywhere in your system. make two folder the name depend on your choice. in first install the Firefox Nightly and second install the current stable version 3.6.12 now the application already add to your start menu otherwise add them manually. now you can use both version nightly and stable. if you deug your web application in IDE such as visual studio or other then they force to open the default browser set in your system they open the version who you use last time. if you use last time nightly then they open your web-application in nightly otherwise in current stable version.

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• Distro that I can load to ram?

  - by NullUserException

  Is there a modified version of Ubuntu that I can choose to load to RAM on start up? Kinda like the LiveCD, but that can be easily modified (ie: I can install stuff) when I choose to boot from disk. The idea is to install it to a USB drive. I know there's something similar but slax is lacking in many departments. A "full" version Ubuntu would be better. A LiveUSB installation seems to be pretty close to what I want, but apparently I have to choose whether or not it will be persistent by the time I install it. I want to be able to choose that every time I boot.

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• Why Does Unity lag Often That I have To Manually Shutdown/Restart my Core i3 Laptop?

  - by user20655

  I did a fresh install of Ubuntu then do did some upgrades. After my next restart when I try to open Ubuntu Software Center it took about 20 seconds for the window to load then 10 more seconds before it became click able. While doing some installation of software, Unity lags like hell that every time I click any application it takes a few seconds before I can see it. Even GEdit take a lot of time to load. The worst part was when I was doing nothing to my computer. Even on that part, my computer lags. My Laptop is a Brand New Core i3 with 2GB of RAM. Unity should run perfectly on that kind of machine right? BTW: I reinstalled Ubuntu 11.04 for about 5 times now and still nothing changed.

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• "Sorry, Ubuntu 12.04 has experienced an internal error."

  - by malapradej

  I have recently upgraded to Precise and had some errors. It seems to be quite random and with differences in the error reports. I have duly sent the reports hoping the system will have found the problem and sorted itself out. After the second error I am following the wizards (software...) advice and seeking help. The 1st time it happened I jotted down the following: ExecutablePath /usr/lib/tracker/tracker-extract LaunchPad bug 950765 AMD64 The second time the following: ExecutablePath /usr/share/appart/appart-gpu-error-intel.py "Possible GPU hang........" sandybridge-m-gt2 LaunchPad bug 981261 If there is anyone that can help it is much appreciated. I did not really want to upgrade at this stage, but was forced to due to the latest version of python-numpy in precise. You win some, you loose some.... Jacques I am using a Pavilion dv6 notebook and 64bit ubuntu 12.04 LTS

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• Oracle Updates Solaris (and Everything Else) for Security

  Oracle's quarterly patch update integrates Sun technology for the first time and patches 47 vulnerabilities in total.

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• Moving two objects proportionally

  - by SSL

  I'm trying to move two objects away from each other at a proportional distance, but on different scales. I'm not quite sure how to do this. Object A can go from position 0.1 to 1. Object B has no limits. If object B is decreasing, then Object A should be decreasing at rate R. Likewise, if Object B is increasing, then Object A increases at rate R. How can I tie these two Object positions together so that in an update loop, they automatically update their positions? I tried using: ObjA.Pos += 0.001f * ObjB.VelocityY; //0.001f is the rate This works but there's an error each time it runs. ObjA starts off at its max position 1 but then the next time it will stop at 0.97, 0.94, 0.91 etc.. This is due to the 0.001f rate I put in. Is there a way to control the rate, yet not end up with the rounding error?

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• Touch Event Not Work With PinchZoom

  - by Siddharth

  I was implemented pinch zoom functionality for my tower of defense game. I manage different entity to display all the towers. From that entity game player select the tower and drag to the actual position where he want to plot the tower. I set the entity in HUD also, so user scroll and zoom the region, the tower become visible all the time. Basically I have created the different entity to show and hide towers only so I can manage it easily. My problem is when I have not perform the scroll and zoom the tower touch and the dragging easily done but when I zoom and scroll the scene at that time the tower touch event does not call so the player can not able to drag and drop it to actual position. So anybody please help me to come out of it.

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