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• Run Python Server at Startup

  - by DizzyDoo

  Hello, I've got a few Python based servers that I need to run, and would like them to start automatically when I start my Ubuntu Server box. What is the best way to execute them like this? I was hoping I could write a Bash script and use Screen to get them running in the background, where I can check on them every now and then, but where as echo screen -d -m python works just fine, echo screen -d -m `sudo python /home/matt/tornadoServer/tornadoDeploy.py` doesn't, with no error messages. Is that something to do with the spaces? Even though I did surround it with backquotes? I also tried: WEB="screen -d -m `sudo python /home/matt/tornadoServer/tornadoDeploy.py`" echo $WEB As a way of escaping the spaces, but no luck. What's Bash scripting way to do this? And, once the Bash script works, where can I put it to make it execute on startup?

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• IT Optimization Plan Pays Off For UK Retailer

  - by [email protected]

  I caught this article in ComputerworldUK yesterday. The headline talks about UK-based supermarket chain Morrisons is increasing their IT spend...OK, sounds good. Even nicer that Oracle is a big part of that. But what caught my eye were three things: 1) Morrison's truly has a long term strategy for IT. In this case, modernizing and optimizing how they use IT for business advantage. 2) Even in a tough economic climate, Morrison's views IT investments as contributing to and improving the bottom line. Specifically, "The investment in IT contributed to a 21 percent increase in Morrison's underlying profit.." 3) The phased, 3-year "Optimization Plan" took a holistic approach to their business--from CRM and Supply Chain systems to the underlying application infrastructure. On the infrastructure front, adopting a more flexible Service-Oriented Architecture enabled them to be more agile and adapt their business and Identity Management helped with sometimes mundane (but costly) issues like lost passwords and being able to document who has access to what. Things don't always turn out so rosy. And I know it was a long and difficult process...but it's nice to see a happy ending every once in a while.

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• Solutions for Project management [closed]

  - by user14416

  The team consists of 3 people. The method of development is Scrum. The language of the project is C++. The project will be under the control of the git system. The start up budget is 0. The following things have to be chosen: Build and Version Numbering Project documentation ( file with the most common info for current stage of the project, which will be changed every time the new version or subversion of the project emerges ) Project management tool ( like Trac or Redmine, I cannot use them, because there is no hosting ) Code documentation ( I consider Doxygen ) The following questions have arisen: What can you add to the above list of the main solutions for project management in the described project? One of three project participants has linux os (No MS Office), one has Windows and MS Office (does not want to use Libre or Open Office), one has Windows, but does not have MS Office. What formats, tools can u suggest using for project documentation? The variant of using online wiki does not fit, it must be files. OneNote mb is a good tool for project management, but because of the reason mentioned above it is not possible. What can you advise? Offer a system for Build and Version Numbering.

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• Howto configure openSuSE firewall to route local traffic to local ports

  - by Eduard Wirch

  I have openSUSE 11.3 installed. I'm using the openSUSE firewall configuration mechanism (/etc/sysconfig/SuSEfirewall2). I have a http server application running on port 8080. I want the http service to be accessible using port 80. I created a redirect rule usign: FW_REDIRECT="0/0,0/0,tcp,80,8080" This works fine for every request coming from external. But it doesn't for local requests. (example: wget http://myserver/) Is there a way how I can tell the firewall to redirect local requests addressed for 80 to port 8080? (using the SUSE firewall configuration file)

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• Dell XPS 15 L502x and Ubuntu 11.04 - HDMI output

  - by Jones

  Recently I've bought my dream's notebook, a Dell XPS 15 but since then this dream became a kind of endless nightmare. I'm almost getting crazy to make my graphic card driver work properly, but it seems to be just impossible. Yes, I have a 2GB NVIDIA GeForce GT 540m (Optimus) in it! It simply doesn't work. Every time I generate the xorg.conf Ubuntu hangs on while starting up, which forces me to remove this file to be able to start the notebook with the standard graphic settings. Another problem is that the Dell XPS 15 does NOT have a VGA output, but a HDMI. So, to be able to use a second monitor I have to configure it by the NVIDIA X Server Settings, which just works if the driver is properly initialized with the xorg.conf. I've also tried to make it work with the Bumblebee, but unfortunately it didn't help me much with the HDMI output. Do you guys have any idea to solve this deadlock? Is there any way for me to use my second monitor?

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• What's the best structure for a repository?

  - by jpmelos

  I've looked into many open source software repositories, and I've found some common elements and somethings people do in different fashion from one another. For example, every repository has a README file, a INSTALL file, a COPYING file and stuff like that. Other things differ: Some projects, like git, have their source code in the root level, while others have the source code in a src/ folder and others, like the Linux kernel, have the source code spread in different folders in root level, that divide code by areas; Some have their tests in a t/ folder, while others in a tests/ folder, or named otherwise; Some have files about submitting patches and who the maintainers are, and those might be inside some Documentation/ or in the root level. Are there recommendations? A best practice? For example: personally, I don't like the code in the root level, git-fashion. It looks messy and confuses one trying to start as a contributor (especially because they have some code inside folders, and scripts in the root level as well, it's really messy). If I were to start a project of my own and wanted to start right from the start, are there recommendations? Best practices? How can I make a clean and clear structure? Thank you!

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• Restore complete PC from another computer

  - by Mirage

  I have a few friends which keep on coming to me every month to format their laptops and then reinstall Windows. This is time consuming. Is there any way that I can make an image of their full system on my Harddrive and then restore to their Laptop from my computer? Edit: What I want is I have the image of the whole laptop on my desktop. The laptop is formatted with no OS. I have no CD/DVD to put in laptop (as the image is 15GB). How will I trasfer the image from my desktop to the laptop without using CD/DVD? Any option for booting via network, etc?

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• APress Deal of the Day - 1/June/2012 - Introducing Visual C# 2010

  - by TATWORTH

  Today's $10 Deal of the Day from APress at http://www.apress.com/9781430231714 is Introducing Visual C# 2010."If you're new to C# programming, this book is the ideal way to get started. Respected author Adam Freeman guides you through the C# language by carefully building up your knowledge from fundamental concepts to advanced features." Adam Freeman is an excellent author. This is an excellent introduction to C# programming and a manual for those with experience. Having read through book, I am very impressed by its practical approach to C#. I cannot improve on the by-line "Get started on your C# journey with an expert by your side leading by example" Adam Freeman teaches C# by precept and example. I suspect he drives a Volvo C30 as it comes up in many of the code examples! Throughout the book there are numerous links back and forth so as to avoid over complicating the current topic. I have have no hesitation in recommending this book both to programmers starting out with C# and to the seasoned professional. It is a book that should be on every C# development team's book shelf.

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• What's so bad about pointers in C++?

  - by Martin Beckett

  To continue the discussion in Why are pointers not recommended when coding with C++ Suppose you have a class that encapsulates objects which need some initialisation to be valid - like a network socket. // Blah manages some data and transmits it over a socket class socket; // forward declaration, so nice weak linkage. class blah { ... stuff TcpSocket *socket; } ~blah { // TcpSocket dtor handles disconnect delete socket; // or better, wrap it in a smart pointer } The ctor ensures that socket is marked NULL, then later in the code when I have the information to initialise the object. // initialising blah if ( !socket ) { // I know socket hasn't been created/connected // create it in a known initialised state and handle any errors // RAII is a good thing ! socket = new TcpSocket(ip,port); } // and when i actually need to use it if (socket) { // if socket exists then it must be connected and valid } This seems better than having the socket on the stack, having it created in some 'pending' state at program start and then having to continually check some isOK() or isConnected() function before every use. Additionally if TcpSocket ctor throws an exception it's a lot easier to handle at the point a Tcp connection is made rather than at program start. Obviously the socket is just an example, but I'm having a hard time thinking of when an encapsulated object with any sort of internal state shouldn't be created and initialised with new.

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• deep expertise in one technology or not so deep understanding of many technologies

  - by district

  Hello everyone. I started to feel a little bit confused recently about my career path as software developer, about what I do, what I know and do I need it. I am 21 years now and I have 3 years of experience. I've been dealing with java/C++ projects, Servlet/JSP/JSF, desktop QT, also some mobile development (Symbian, Android) I work for a quite a small company, around 20 developers with different projects. I'm also a student. The problem is that I'm not sure if I'm taking the right road here. I'm starting to work with new technology every few months. I don't have deep understanding in any of these and I'm not sure if this is what I need. I will probably not become an expert in any of these. The other path is maybe to start working for a big company which use one set of technologies and become an expert. What's your opinion on this topic ? What is more valuable ?

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• Sql server 2000 replication error

  - by Renato

  Good morning, I have a sql server 2000 machine, with SP4. I have a transactional replication. A keep receving this error message: The process could not execute 'sp_replcmds' on 'servername' the logreader stops responding.When i click start it starts fine, and the replication starts fine.And then, works for hours, and the problem comes back. In the begining i though it could be timeouts, but i already set a couple of parameters in the logreader profile,like querytimeout/readbatchsize. Sometimes when the logreader stops,it generates a dump, but not always. In event viewer, it appears this message: 17066 : SQL Server Assertion: File: , line=1985 Failed Assertion = 'startLSN = m_curLSN'. 18052 : Error: 3624, Severity: 20, State: 1. 17066 : SQL Server Assertion: File: , line=2223 Failed Assertion = 'm_noOfScAlloc == 0'. I also executed checkdb in the databases, and they are fine. have you every experienced something similar? thanks in advance, Renato Alves.

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• Why is Ubuntu's clock getting slower or faster?

  - by ændrük

  Ubuntu's clock is off by about a half hour: Where do I even start troubleshooting this? It's allegedly being set "automatically from the Internet". How can I verify that "the Internet" knows what time it is? Details Ubuntu has had plenty of time to communicate with the Internet: $ date; uptime Fri May 18 05:56:00 PDT 2012 05:56:00 up 12 days, 10:48, 2 users, load average: 0.61, 0.96, 1.15 This time server I found via a web search does appear to know the correct time: $ date; ntpdate -q north-america.pool.ntp.org Fri May 18 05:56:09 PDT 2012 server 208.38.65.37, stratum 2, offset 1752.625337, delay 0.10558 server 46.166.138.172, stratum 2, offset 1752.648597, delay 0.10629 server 205.189.158.228, stratum 3, offset 1752.672466, delay 0.11829 18 May 05:56:18 ntpdate[29752]: step time server 208.38.65.37 offset 1752.625337 sec There aren't any reported errors related to NTP: $ grep -ic ntp /var/log/syslog 0 After rebooting, the time was automatically corrected and the following appeared in /var/log/syslog: May 18 17:58:12 aux ntpdate[1891]: step time server 91.189.94.4 offset 1838.497277 sec A log of the offset reported by ntpdate reveals that the clock is drifting by about 9 seconds every hour: $ while true; do ntpdate-debian -q | tail -n 1 >> 'drift.log'; sleep 16m; done ^C $ r -e ' attach(read.table("drift.log", header=FALSE)) clock <- as.POSIXct(paste(V1, V2, V3), format="%d %b %H:%M:%S") fit <- lm(V10~clock) png("drift.png") plot(clock, V10, xlab="Clock time", ylab="Time server offset (s)") abline(fit) mtext(sprintf("Drift rate: %.2f s/hr", fit$coefficients[[2]]*3600)) '

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• Are Intel compilers really better than Microsoft ones?

  - by Rocket Surgeon

  Years ago I was surprised when discovered that Intel sells Studio compatible compilers. I tried it in particular for C/C++ as well as fantastic diagnostic tools. But the code was simply not that computationally intensive to notice the difference. The only impression was: did Intel really did it for me just now, Wow, amazing tools with nanoseconds resolution, unbeleivable. But the trial ended and team never seriously considered a purchase. From your experience, if license cost does not matter, which vendor is a winner ? It is not broad or vague question or attemt to spark a holy war. This sort of question about 2 very visible tools. Nobody likes when tools have any mysteries or surprises. And choices between best and best are always the pain. I also understand the "grass greener" argument. I want to hear all "what ifs" stories. What if Intel just locally optimizes it for the chip stepping of the month, and not every hardware target will actually work as well as Microsoft compiled ? What if AMD hardware is the target and everything will slow down for no reason ? Or on other hand, what if Intel's hardware has so many unnoticable opportunities, that Microsoft compiler writers are too slow to adopt and never implement in the compiler ? What if both are the same exactly, actually a single codebase just wrapped into 2 different boxes and licensed to both vendors by some 3rd party shop? And so on. But someone knows some answers.

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• OpenLDAP RHEL 6

  - by AndyM

  Hi all I've been configuring OpenLDAP on RHEL 6 and its seems you have run the following to rebuild the config dirs. I'm ok with that , but my issues is , say I want to change the server passwd , do I have to go through the whole process every time I change the config ? Is there a way of changing the slapd config after its been built using the RHEL6 method ? below is the advice I've found on the net from http://www.linuxtopia.org/online_books/rhel6/rhel_6_migration_guide/rhel_6_migration_ch07s03.html This example assumes that the file to convert from the old slapd configuration is located at /etc/openldap/slapd.conf and the new directory for OpenLDAP configuration is located at /etc/openldap/slapd.d/. Remove the contents of the new /etc/openldap/slapd.d/ directory: rm -rf /etc/openldap/slapd.d/* Run slaptest to check the validity of the configuration file and specify the new configuration directory: slaptest -f /etc/openldap/slapd.conf -F /etc/openldap/slapd.d Configure permissions on the new directory: chown -R ldap:ldap /etc/openldap/slapd.d chmod -R 000 /etc/openldap/slapd.d chmod -R u+rwX /etc/openldap/slapd.d

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• Can Excel sorts be saved and used again?

  - by Robert Kerr

  On an Excel 2007 worksheet, I have several tables, each sharing the same columns. For every table, I sort in several particular ways, depending on the task at hand. It gets tedious going to the Data tab, clicking Sort, unchecking the "my data has headers" checkbox, then add/removing the columns and ordering sort criteria. Is it possible to: * Save a given sort criteria (a named sort)? * Apply the sort against any selected range? * Create a button to execute each saved sort? In the end, I would create 4 or 5 named sorts and a button for each on the worksheet. Then would be able to select any range of rows, from any table, and click one of the sort buttons. The sort would execute.

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• Outlook 2010 "forgets" password

  - by Cameron Aziz

  I am running Outlook 2010 on Windows 7 Pro x64 on a domain. Outlook is connecting to exchange, and the username and password should be pulled from my logon credentials. The problem is, about every few hours, outlook "forgets" what my password is. In the taskbar, a caution triangle appears, and in the bottom right hand corner of exchange, a "Needs Password" replaces "Connected to Microsoft Exchange." Simply clicking "Needs Password" fixes the issue, and new messages are downloaded. What could the issue be? What could be timing out? Edit: Also, at times the following window appears: This is my Security Settings

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• Who is code wanderer?

  - by DigiMortal

  In every area of life there are people with some bad habits or misbehaviors that affect the work process. Software development is also not free of this kind of people. Today I will introduce you code wanderer. Who is code wanderer? Code wandering is more like bad habit than serious diagnose. Code wanderers tend to review and “fix” source code in files written by others. When code wanderer has some free moments he starts to open the code files he or she has never seen before and starts making little fixes to these files. Why is code wanderer dangerous? These fixes seem correct and are usually first choice to do when considering nice code. But as changes are made by coder who has no idea about the code he or she “fixes” then “fixing” usually ends up with messing up working code written by others. Often these “fixes” are not found immediately because they doesn’t introduce errors detected by compilers. So these “fixes” find easily way to production environments because there is also very good chance that “fixed” code goes through all tests without any problems. How to stop code wanderer? The first thing is to talk with person and explain him or her why those changes are dangerous. It is also good to establish rules that state clearly why, when and how can somebody change the code written by other people. If this does not work it is possible to isolate this person so he or she can post his or her changes to code repository as patches and somebody reviews those changes before applying them.

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• SharePoint Server Search Not Crawling

  - by tekiegreg

  Hi there, we recently moved some sites into a new farm, everything seems to be doing fine, but the search for reasons I can't identify are not crawling the migrated content. We're getting this message in our crawl log for every document: http://xxx/sites/...announcements The object was not found. (The item was deleted because it was either not found or the crawler was denied access to it.) Of course the first thing I suspected was the crawler access account, so I logged into SharePoint with the account and was able to access via that URL just fine. I tried upping permissions (even all the way up to Admin) but to no avail. Thoughts?

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• How to require a cell input if another cell has a value

  - by Connor

  I'm trying to edit the VBA for one of my workbooks so that If there is a value in column A, then a value for column C is required or else the file won't save, but i'm having some trouble with this. I can get excel to check a cell for any input and require it have input, but I need it to check if a different cell has an input before requiring input. This is because not all of the lines in my spreadsheet will be used all of the time, but some people forget to put very important pieces of information in the spreadsheet which throws some of our balances off. An SKU is entered on the sheet when we switch to a new one, and I want the program to make sure there is an amount of product in a given cell every time a new SKU is entered onto the sheet. Thanks.

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• Audio services in windows 7

  - by infant programmer 'Aravind'

  In an attempt of blocking a viral service on my system (which was restarting my system automatically for every 30 seconds), I disabled all the services, and later enabled trustworthy services only. (note: Hide all microsoft services didn't work blocking the auto restart so I disabled all services) Now I have been succeeded in blocking automatic restart and I am able to access internet and all other necessary stuffs. Well, however system audio is mute(definitely because a necessary service is not running). Now I need a list of services that need to be started (set automatic) on windows 7.

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• What is the difference between Callback<T> and Java 8's Supplier<T>?

  - by Dan Pantry

  I've been switching over to Java from C# after some recommendations from some over at CodeReview. So, when I was looking into LWJGL, one thing I remembered was that every call to Display must be executed on the same thread that the Display.create() method was invoked on. Remembering this, I whipped up a class that looks a bit like this. public class LwjglDisplayWindow implements DisplayWindow { private final static int TargetFramesPerSecond = 60; private final Scheduler _scheduler; public LwjglDisplayWindow(Scheduler displayScheduler, DisplayMode displayMode) throws LWJGLException { _scheduler = displayScheduler; Display.setDisplayMode(displayMode); Display.create(); } public void dispose() { Display.destroy(); } @Override public int getTargetFramesPerSecond() { return TargetFramesPerSecond; } @Override public Future<Boolean> isClosed() { return _scheduler.schedule(() -> Display.isCloseRequested()); } } While writing this class you'll notice that I created a method called isClosed() that returns a Future<Boolean>. This dispatches a function to my Scheduler interface (which is nothing more than a wrapper around an ScheduledExecutorService. While writing the schedule method on the Scheduler I noticed that I could either use a Supplier<T> argument or a Callable<T> argument to represent the function that is passed in. ScheduledExecutorService didn't contain an override for Supplier<T> but I noticed that the lambda expression () -> Display.isCloseRequested() is actually type compatible with both Callable<bool> and Supplier<bool>. My question is, is there a difference between those two, semantically or otherwise - and if so, what is it, so I can adhere to it?

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• XCOPY /Exclude Directory Syntax

  - by Onion-Knight

  I'm trying to use XCOPY to copy a directory that looks like this: -MainFolder -ManyFoldersIWantToCopy -ManyFoldersIWantToCopy -... -Source Code I want to use the /EXCLUDE option to copy every folder except Source Code. I tried using the following, but I did not have any luck: xcopy "Source" "Destination" /EXCLUDE:"\Source Code\" /E /C /R /I /K /Y The error message I receive says: Can't read file: "\Source Code\". I've tried removing the double-quotes all together, using single-quotes instead, with/without the \'s, but I get the same error message. Any ideas?

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• Caching DNS server (bind9.2) CPU usage is so so so high.

  - by Gk

  Hi, I have a caching-only dns server which get ~3k queries per second. Here is specs: Xeon dual-core 2,8GHz 4GB of RAM Centos 5x (kernel 2.6.18-164.15.1.el5PAE) bind 9.4.2 rndc status: recursive clients: 666/4900/5000 About 300 new queries (not in cache) per second. Bind always uses 100% on one core on single-thread config. After I recompiled it to multi-thread, it uses nearly 200% on two core :( No iowait, only sys and user. I searched around but didn't see any info about how bind use CPU. Why does it become bottleneck? One more thing, here is RAM usage: cat /proc/meminfo MemTotal: 4147876 kB MemFree: 1863972 kB Buffers: 143632 kB Cached: 372792 kB SwapCached: 0 kB Active: 1916804 kB Inactive: 276056 kB I've set max-cache-size to 0 to make sure bind can use as much RAM as it want, but it always stop at ~2GB. Since every second we got not cached queries so theoretically RAM must be exhausted but it wasn't. Do you have any idea? TIA, -Gk

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• How to handle multiple effect files in XNA

  - by Adam 'Pi' Burch

  So I'm using ModelMesh and it's built in Effects parameter to draw a mesh with some shaders I'm playing with. I have a simple GUI that lets me change these parameters to my heart's desire. My question is, how do I handle shaders that have unique parameters? For example, I want a 'shiny' parameter that affects shaders with Phong-type specular components, but for an environment mapping shader such a parameter doesn't make a lot of sense. How I have it right now is that every time I call the ModelMesh's Draw() function, I set all the Effect parameters as so foreach (ModelMesh m in model.Meshes) { if (isDrawBunny == true)//Slightly change the way the world matrix is calculated if using the bunny object, since it is not quite centered in object space { world = boneTransforms[m.ParentBone.Index] * Matrix.CreateScale(scale) * rotation * Matrix.CreateTranslation(position + bunnyPositionTransform); } else //If not rendering the bunny, draw normally { world = boneTransforms[m.ParentBone.Index] * Matrix.CreateScale(scale) * rotation * Matrix.CreateTranslation(position); } foreach (Effect e in m.Effects) { Matrix ViewProjection = camera.ViewMatrix * camera.ProjectionMatrix; e.Parameters["ViewProjection"].SetValue(ViewProjection); e.Parameters["World"].SetValue(world); e.Parameters["diffuseLightPosition"].SetValue(lightPositionW); e.Parameters["CameraPosition"].SetValue(camera.Position); e.Parameters["LightColor"].SetValue(lightColor); e.Parameters["MaterialColor"].SetValue(materialColor); e.Parameters["shininess"].SetValue(shininess); //e.Parameters //e.Parameters["normal"] } m.Draw(); Note the prescience of the example! The solutions I've thought of involve preloading all the shaders, and updating the unique parameters as needed. So my question is, is there a best practice I'm missing here? Is there a way to pull the parameters a given Effect needs from that Effect? Thank you all for your time!

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• Free Cloud Mind Map Solution

  - by Zekta Chan

  As a Software Engineer we had a lot of discussion on SE design. Although we sync every document on the development process on Google Doc, mind map just didn’t fit in Google doc yet. The best we can do is to store a copy and share it online. To me, Mind map is an ir-replaceable piece of tools (yet) as agile note taking tools. And an eFormat is even greater than a paper one, due to the portability and extensibility. Does anyone have a good solution on “cloud-sharing” mind map? (We are using FreeMind at the moment) Thanks

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