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• Using socat to exec php cli

  - by RoyHB

  There are multiple client programs that periodically connect to a port on my server and send a single line of text. When a connection to the port is made I need to start a PHP CLI script that processes the data. There may be many of the remote scripts running/connecting at more or less the same time so I think it would be best if socat forked a process for each connection to run the script. I've gotten socat to do most of what I need, using the command socat tcp-l:myport,fork exec:mypath/socatTest.php I can read the input on php://stdIn. All is good. The problem is that the process doesn't seem to fork, so if a second external program sends data while another is doing the same it gets a connection refused error. Where have I gone wrong?

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• Running 'dd' command at startup?

  - by Usman Ajmal

  Hi, I have set a script to run at Linux startup. The script contains a following line of code dd if=/dev/sda2 of=/dev/sda5 ?> result.txt Now, when my Linux Desktop appear, result.txt contain dd: opening '/dev/sda2': Permission denied If I prefix the dd command with sudo as: sudo dd if=/dev/sda2 of=/dev/sda5 ?> result.txt the result.txt contains sudo: no tty present and no askpass program specified Is there a way I can get around this problem? What I want is to copy 2nd parititon to 5th when a user logs in no matter if he is root, admin, Desktop or an unprivileged user. Thanks a lot as always.

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• How to recover data from Dell dimension 9150 RAID 0 on another system?

  - by Adam

  I have a Dell Dimension 9150 which has failed. I'm trying to recover the data. It had two SATA 250GB drives in RAID 0 configuration. I'm trying to use a shuttle PC running Windows7 to recover the data from the drives which contained an XP boot volume. I just want the data, it doesn't have to boot. What program would I need to rebuild / interrogate the drives (one of them is failing the onboard hardware test)? What drivers would I need to install? Windows7 sees the drive as one partition but doesn't see volume information. Ubuntu can see the drive as one partition and also can tell what the drive is called, but can't access the data Any help appreciated!! :)

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• Context switches much slower in new linux kernels

  - by Michael Goldshteyn

  We are looking to upgrade the OS on our servers from Ubuntu 10.04 LTS to Ubuntu 12.04 LTS. Unfortunately, it seems that the latency to run a thread that has become runnable has significantly increased from the 2.6 kernel to the 3.2 kernel. In fact the latency numbers we are getting are hard to believe. Let me be more specific about the test. We have a program that has two threads. The first thread gets the current time (in ticks using RDTSC) and then signals a condition variable once a second. The second thread waits on the condition variable and wakes up when it is signaled. It then gets the current time (in ticks using RDTSC). The difference between the time in the second thread and the time in the first thread is computed and displayed on the console. After this the second thread waits on the condition variable once more. So, we get a thread to thread signaling latency measurement once a second as a result. In linux 2.6.32, this latency is somewhere on the order of 2.8-3.5 us, which is reasonable. In linux 3.2.0, this latency is somewhere on the order of 40-100 us. I have excluded any differences in hardware between the two host hosts. They run on identical hardware (dual socket X5687 {Westmere-EP} processors running at 3.6 GHz with hyperthreading, speedstep and all C states turned off). We are changing the affinity to run both threads on physical cores of the same socket (i.e., the first thread is run on Core 0 and the second thread is run on Core 1), so there is no bouncing of threads on cores or bouncing/communication between sockets. The only difference between the two hosts is that one is running Ubuntu 10.04 LTS with kernel 2.6.32-28 (the fast context switch box) and the other is running the latest Ubuntu 12.04 LTS with kernel 3.2.0-23 (the slow context switch box). Have there been any changes in the kernel that could account for this ridiculous slow down in how long it takes for a thread to be scheduled to run?

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• Can Windows 7 place a task bar on each monitor, which only shows applications running on that screen

  - by OverloadUT

  I would like to have a task bar on each of my monitors, but I only want applications that are currently on that monitor to be displayed on its taskbar. This can be accomplished using UltraMon, however the taskbar shown on the secondary and tertiary monitors is not the native Windows 7 taskbar, but rather made to try to simulate how it looks and feels. As good as it is, it is missing a ton of the features I find best about the taskbar, such as program grouping, "peeking" at applications and so forth. So I am wondering if there is a way to make Windows 7 actually display its native awesome taskbar on multiple monitors.

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• How can I find out what's uploading traffic to the internet?

  - by Nick G

  Some program I'm running is constantly uploading to the Internet. It's uploaded 300MB in the last few hours. I could reboot and see if it stops, but I'd prefer to find out what it is if possible. I've tried using the resource monitor but it's totally nonsensical - even if I run a broadband speedtest, it barely registers any traffic. Ideally I'd like to find a tool which can tell me the current bandwidth of each application. I think NetLimiter used to work on XP but it's not supported for Windows 7.

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• How to move from Programmer to Project Lead

  - by DoctaStooge

  At my job, I'm currently a programmer, but in the next few weeks I'll be taking control my own project. I was wondering if anyone else here has been in the same situation, and if so, what advice you can offer to help me be able to better run my project. Experience in dealing with contractors would be greatly appreciated. A little more info: Project will have 3 people including myself, with extra people coming in when needing testing. The project has been programmed mainly by 2 people I would like to contribute to the programming as I like doing it and think I can add to the program, but am afraid of how the contractors will react. I don't want to create bad feelings which may harm the project. EDIT: Forgot to mention that I'll have to be picking up communications with customers to make sure their needs are met. Any advice on talking to customers cold would be greatly appreciated. EDIT 2: This is not a new project, I'm picking it up around version 6. Sorry that I didn't make it clear before.

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• How Do Computers Work? [closed]

  - by Rob P.

  This is almost embarrassing ask...I have a degree in Computer Science (and a second one in progress). I've worked as a full-time .NET Developer for nearly five years. I generally seem competent at what I do. But I Don't Know How Computers Work! Please, bare with me for a second. A quick Google of 'How a Computer Works' will yield lots and lots of results, but I struggled to find one that really answered what I'm looking for. I realize this is a huge, huge question, so really, if you can just give me some keywords or some direction. I know there are components....the power supply, the motherboard, ram, CPU, etc...and I get the 'general idea' of what they do. But I really don't understand how you go from a line of code like Console.Readline() in .NET (or Java or C++) and have it actually do stuff. Sure, I'm vaguely aware of MSIL (in the case of .NET), and that some magic happens with the JIT compiler and it turns into native code (I think). I'm told Java is similar, and C++ cuts out the middle step. I've done some mainframe assembly, it was a few years back now. I remember there were some instructions and some CPU registers, and I wrote code....and then some magic happened....and my program would work (or crash). From what I understand, an 'Emulator' would simulate what happens when you call an instruction and it would update the CPU registers; but what makes those instructions work the way they do? Does this turn into an Electronics question and not a 'Computer' question? I'm guessing there isn't any practical reason for me to understand this, but I feel like I should be able to. (Yes, this is what happens when you spend a day with a small child. It takes them about 10 minutes and five iterations of asking 'Why?' for you to realize how much you don't know)

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• What would be a good opensource software for graphing circles, circular regions, and regions bounded by curves and/or arcs?

  - by Michael Dykes

  Hullo all. I have just started s job with Chegg, and my 1st assignment has me writign solutions for Stewart's Essential Calculus. I am dealing with the chapter on multiple integration, and need a good open-source software that I can easily use to draw regions (domains) that would require multiple integrals: i.e. circular regions, portions of circles, regions bounded by curves and/or arcs, and at some point 3D pictures. In most of these cases, I am not working with an exact equation or perhaps need to draw the region bounded by r (radius) between 1 and 2, and the angle theta bounded between pi/4 and 3 pi/4. I am not too terribly familiar with programs like Corel Draw, but the documents I have from this company suggest Corel Draw. So I think I am looking for an open-source free program like Corel Draw or something similar. Any additional suggestions would also be appreciated. I know I can do most, if not all of this using TikZ, but the learning curve is a bit steep, and at the moment I an on a time constraint. Thanks.

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• file:// command-line arguments

  - by Cory Grimster

  Is it possible to pass command-line arguments to a program that is invoked via a file:// url? I'm trying to include Remote Desktop links in a wiki page that lists some servers: <a href="file:///c|/windows/system32/mstsc.exe /v:serverName">serverName</a> When I omit the argument the link works fine, but when I include it the link doesn't work. I Googled around a bit and couldn't find any references to this. I suspect that the answer is that file:// urls simple don't accept arguments (I can think of all kinds of ways to abuse them if they do), but I thought I'd throw it out there in case I've simply got the syntax wrong. Thanks.

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• CUDA 4.1 Update

  - by N0xus

  I'm currently working on porting a particle system to update on the GPU via the use of CUDA. With CUDA, I've already passed over the required data I need to the GPU and allocated and copied the date via the host. When I build the project, it all runs fine, but when I run it, the project says I need to allocate my h_position pointer. This pointer is my host pointer and is meant to hold the data. I know I need to pass in the current particle position to the required cudaMemcpy call and they are currently stored in a list with a for loop being created and interated for each particle calling the following line of code: m_particleList[i].positionY = m_particleList[i].positionY - (m_particleList[i].velocity * frameTime * 0.001f); My current host side cuda code looks like this: float* h_position; // Your host pointer. This holds the data (I assume it's already filled with the data.) float* d_position; // Your device pointer, we will allocate and fill this float* d_velocity; float* d_time; int threads_per_block = 128; // You should play with this value int blocks = m_maxParticles/threads_per_block + ( (m_maxParticles%threads_per_block)?1:0 ); const int N = 10; size_t size = N * sizeof(float); cudaMalloc( (void**)&d_position, m_maxParticles * sizeof(float) ); cudaMemcpy( d_position, h_position, m_maxParticles * sizeof(float), cudaMemcpyHostToDevice); Both of which were / can be found inside my UpdateParticle() method. I had originally thought it would be a simple case of changing the h_position variable in the cudaMemcpy to m_particleList[i] but then I get the following error: no suitable conversion function from "ParticleSystemClass::ParticleType" to "const void *" exists I've probably messed up somewhere, but could someone please help fix the issues I'm facing. Everything else seems to running fine, it's just when I try to run the program that certain things hit the fan.

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• MadMACs is attempting to run after wifi autoconnect in Windows 7

  - by Dan

  I have been trying to get MadMACs to run on startup with my Win 7 x64 install. I've used the default registry startup option that is built into the script, but when I startup wlan0 is not randomized, and, in fact, the popup asking whether I want to allow the program to modify my machine comes up after WiFi connection (and obviously before the script has run). I would really like to get this working, but I'm at a dead end. Googling has not returned anything useful so any nudges in the right direction would be appreciated!

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• Windows Azure Error: Failed to start Storage Emulator: the SQL Server instance ‘localhost\SQLExpress’ could not be found

  - by DigiMortal

  When running some of your Windows Azure applications when storage emulator is not configured you may get the following error: "Windows Azure Tools: Failed to initialize Windows Azure storage emulator. Unable to start Development Storage. Failed to start Storage Emulator: the SQL Server instance ‘localhost\SQLExpress’ could not be found.   Please configure the SQL Server instance for Storage Emulator using the ‘DSInit’ utility in the Windows Azure SDK.". Here’s how to solve this problem. You need to run DSInit utility to create database. For Windows Azure SDK 1.6 the location for DSInit utility is: C:\Program Files\Windows Azure Emulator\emulator\devstore By default DSInit expects that your database server is (local)\SQLEXPRESS but you can change it easily. If you have MSSQL instance called SQLEXPRESS then it is enough to just run DSInit. If you need some other instance then run the following command: DSInit /sqlinstance:<instance name> For default instance use “.” as instance name: DSInit /sqlinstance:. You can find more information about sqlinstance and other switches from DSInit documentation. If database was correctly created you should see dialog like this: When storage database is ready you can run your application.

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• getting Thunderbird rescan imap folder

  - by asdmin

  Since I got an external program (imapfilter) modifying my imap folder, thunderbird keeps loosing track of new messages. Messages are moved upon arrival in sub-folders, making Thunderbird unable keep tracking them - therefore I have no clue which folders to look for new messages, and newly created folders (even I subscribe them after creation) does not show up until I restart the mail client. Is there any extension or setting for Thunderbird which I could use to trigger re-scanning my folder tree? Please don't waste time on advices like restarting Thunderbird: takes a great amount of time, or "use Evolution (or any other mail client)", or use internal mail filters: they are not sophisticated enough or procmail/fetchmail: I'm arranging a remote imap server for good EXTENSION 1: even folders can be created in the background, without Thunderbird would know it has been created.

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• Print each bookmark of a PDF separately

  - by Dave

  I have a very large (1000 page) PDF which contains about 100, ten page each documents one after the other. I would like to have them sent to my office printer as individual files so my office printer will print them double sided and staple each one individually. I'm using Adobe Acrobat X and think the first step is to bookmark the start of each of those 100 documents. I don't know the next step though. I also have a batch printing program so if i can extract each of those 100 bookmarks to individual files that would work too. Thanks for all the help.

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• Software to create a virtual parallel port in Windows XP?

  - by drknexus

  I am writing a program that will eventually be used on a computer with a physical parallel port and will need to set certain pins high or low in order to signal to an external device. However, the development laptop I am using does not have any physical parallel ports and is too low powered to run a virtual machine. Is there any option available that will create a virtual parallel port within Windows XP? Ideally it would include a debug mode that would allow me to see what values have been pushed out on the parallel port.

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• Why doesn't my Nvidia driver support 1280*1024?

  - by Alvar

  EDIT: I think the problem is in the NVIDIA x server, that doesn't support an RGB screen from 1990. The screen was the best of them all when it was released. This a strange thing! In windows the EDID must work because 1280*1024 is used as max resolution, but in ubuntu those stuff aren't being received, so how do I tell ubuntu/nivida to find those EDID stuff? Hi, I have an external monitor which is an 20" 1280*1024. In windows 7 it works fine with that resolution but in ubuntu it can't. The screens model name is IntelliColor Display/20 and the name of the company is "radius".recived Well, twin view is working but the only maximum resolution is 1024*768. I'm using nividas x server program. If I force it to use 1280*1024 it all crashes and I have to force a reboot. alvar@alvars-laptop:~$ disper -l display DFP-0: HSD121PHW1 resolutions: 320x175, 320x200, 360x200, 320x240, 400x300, 416x312, 512x384, 640x350, 576x432, 640x400, 680x384, 720x400, 640x480, 720x450, 640x512, 700x525, 800x512, 840x525, 800x600, 960x540, 832x624, 1024x768, 1366x768 display CRT-0: CRT-0 resolutions: 320x240, 400x300, 512x384, 680x384, 640x480, 800x600, 1024x768, 1152x864, 1360x768

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• Windows port forwarding

  - by carlesso

  This is the scenario: A Windows XP client A Linux Server The client is natted/firewalled/unreacheable from outside, the linux server is public. I need to allow the client, once upon some conditions, to expose the remote desktop port (3389) on the Linux Server, somethig like ssh -R 3389:localhost:3389. I dream it as a service, or something like that so I can start and stop the "forwarding-session" on my needs. I've to pilot this session from some program-language (python or ruby mostly). Any hint? Thanks in advance.

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• What online games would let me practice AI development?

  - by Myn

  I am working on a project experimenting with Artificial Intelligence design methodologies for online world avatars. Online world here is quite open to interpretation; Second Life is just as applicable as Counter Strike, for example. To carry out these experiments, I must first develop an intelligent agent for the world in question. However, I am honestly quite stuck as to which game I could use for this. My preference was to develop an intelligent "bot" to play an MMORPG, but the legal restrictions of such games prevent me. Likewise with most FPS games the use of an intelligent agent in place of a human player is considered cheating. The alternative, of course, is to create an NPC bot; an intelligent agent that populates the world alongside the player(s) rather than replacing a particular player. However, I'm struggling to find a game that would enable me to create an intelligent opponent either. I suppose the main requirements would be a game allows a third party program to use the function calls usually utilised by players and read feedback on the state of the world. Quake III and Unreal Tournament have been suggested before, but they have already been the subject of work on this research project. Short of writing my own online game from scratch, what games would allow me, through middleware, an API, or otherwise, to create either an artificially intelligent player or a bot?

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• The (non) Importance of Language

  - by Eric A. Stephens

  Working with a variety of clients on EA initiatives one begins to realize that not everyone is a fan of EA. Specifically, they are not a fan of the "a-word". Some organizations have abused this term with creating and assigning the title to just about anyone who demonstrates above average prowess with a particular technology. Other organizations will assign the title to those managers left with no staff after a reorg. Some companies, unfortunately, have simply had a bad go of it with regard to EA...or any "A" for that matter. What we call "EA" is almost irrelevant. But what is not negotiable for those to succeed in business is to manage change. That is what EA is all about. I recall sitting in Zachman training led by himself. He posits the only organizations that don't need EA (or whatever you want to call it) are those that are not changing. My experience suggests those orgs that aren't changing aren't growing. And if you aren't growing, you're dying. Any EA program will not succeed unless there is a desire to change. No desire to change suggests the EA/Advisor/Change Agent should just walk the other way.

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• SQL database testing: How to capture state of my database for rollback.

  - by Rising Star

  I have a SQL server (MS SQL 2005) in my development environment. I have a suite of unit tests for some .net code that will connect to the database and perform some operations. If the code under test works correctly, then the database should be in the same (or similar) state to how it was before the tests. However, I would like to be able to roll back the database to its state from before the tests run. One way of doing this would be to programmatically use transactions to roll back each test operation, but this is difficult and cumbersome to program; it could easily lead to errors in the test code. I would like to be able to run my tests confidently knowing that if they destroy my tables, I can quickly restore them? What is a good way to save a snapshot of one of my databases with its tables so that I can easily restore the database to it's state from before the test?

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• Enablement 2.0 Get Specialized!

  - by mseika

  Enablement 2.0 Get Specialized! Oracle PartnerNetwork Specialized program is releasing new certifications on our latest products, and partners are invited to be the first candidates. Primavera Portfolio Management 9 SpecializationNew Specialist Guided Learning Paths Available! · Primavera Portfolio Management 9 Sales Specialist · Primavera Portfolio Management 9 PreSales Specialist · Primavera Portfolio Management 9 Implementation Specialist · Primavera Portfolio Management Support Specialist New Specialist Guided Learning Paths Available! · Primavera Portfolio Management 9 Sales Specialist Assessment · Primavera Portfolio Management 9 PreSales Specialist Assessment · Primavera Portfolio Management Support Specialist New OPN Boot Camp Available! · Primavera Portfolio Management Implementation Boot CampThis boot camp is designed to introduce users to the powerful features of Primavera Portfolio Management in tandem with building and configuring solutions appropriate to client needs to add value and solve business pains associated with portfolio management such as: System Set-up and Configuration; Administration processes; Create and manage categories, value lists, functions, scorecards, portfolios, investor maps, tables, forms, graphs, dashboards and workflows. The principal objective is ensuring attendees are able to design and configure enterprise Portfolio Management solutions.Contact UsPlease direct any inquiries you may have to Oracle Partner Enablement team at [email protected].

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• Win XP Pro, IIS 5.1, PCI Compliance

  - by Mudman266

  I have a client that was scanned and determined not to be PCI Compliant. I looked and they had IIS setup to allow a program from central office to push/pull info from their server. Many of the reasons they failed appeared to have been fixed in SPs (they were on SP2) or security updates. I fully patched the server to (Windows XP Pro) SP3 with all optional updates. I had them scan again and again they failed with only one less vulnerability that I manually corrected (server was showing debugging/error messages). The main issue I'm having is that when I research the CVE code for each error, they say they are fixed in SP2 and up. I'm wondering if I need to remove IIS and resetup since I have patched to SP3. Any ideas?

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• Web Applications Desktop Integrator (WebADI) Feature for Install Base Mass Update in 12.1.3

  - by LuciaC

  Purpose The integration of WebADI technology with the Install Base Mass Update function is designed to make creation and update of bulk item instances much easier than in the past. What is it? WebADI is an Excel-based desktop application where users can download an Excel template with item instances pre-populated based on search criteria.  Users can create and update item instances in the Excel sheet and finally upload the Excel data using an "upload" option available in the Excel menu. On upload, the modified data will bulk upload to interface tables which are processed by an asynchronous concurrent program that users can monitor for the uploaded results. Advantage: This allows users to work in a disconnected Environment: session time outs can be avoided, as once a template is downloaded the user can work in a disconnected environment and once all updates are done the new input can be uploaded. Also the data can be saved for later update and upload. For more details review the following: R12.1.3 Install Base WebADI Mass Update Feature (Doc ID 1535936.1) How To Use Install Base WebADI Mass Update Feature In Release 12.1.3 (Doc ID 1536498.1).

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• How do I retain previously drawn graphics?

  - by Cromanium

  I've created a simple program that draws lines from a fixed point to a random point each frame. I wanted to keep each line on the screen. However, it always seems to be cleared each time it draws on the spriteBatch even without GraphicsDevice.Clear(color) being called. What seems to be the problem? protected override void Draw(GameTime gameTime) { spriteBatch.Begin(); DrawLine(spriteBatch); spriteBatch.End(); base.Draw(gameTime); } private void DrawLine(SpriteBatch spriteBatch) { Random r = new Random(); Vector2 a = new Vector2(50, 100); Vector2 b = new Vector2(r.Next(0, 640), r.Next(0,480)); Texture2D filler= new Texture2D(GraphicsDevice, 1, 1, false, SurfaceFormat.Color); filler.SetData(new[] { Color.Black }); float length = Vector2.Distance(a, b); float angle = (float)Math.Atan2(b.Y - a.Y, b.X - a.X); spriteBatch.Draw(filler, a, null, Color.Black, angle, Vector2.Zero, new Vector2(length,10.0f), SpriteEffects.None, 0f); } What am I doing wrong?

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