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• Why ~/.bash_profile is not getting sourced when opening a terminal in Ubuntu 11.04?

  - by Viriato

  Problem I have an Ubuntu 11.04 Virtual Machine and I wanted to set up my Java development environment. I did as follows sudo apt-get install openjdk-6-jdk Added the following entries to ~/.bash_profile export JAVA_HOME=/usr/lib/jvm/java-6-openjdk export PATH=$PATH:$JAVA_HOME/bin Save the changes and exit Open up a terminal again and typed the following echo $JAVA_HOME (blank) echo $PATH (displayed, but not the JAVA_HOME value) Nothing happened, like if the export of JAVA_HOME and it's addition to the PATH were never done. Solution I had to go to ~/.bashrc and add the following entry towards the end of file #Source bash_profile to set JAVA_HOME and add it to the PATH because for some reason is not being picked up . ~/.bash_profile Questions Why did I have to do that? I thought bash_profile, bash_login or profile in absence of those two get executed first before bashrc. Was in this case my terminal a non-login shell? If so, why when doing su after the terminal and putting the password it did not execute profile where I had also set the exports mentioned above?

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• Can decoupling hurt maintainability in certain situations?

  - by Ceiling Gecko

  Can the fact that the business logic is mapped to interfaces instead of implementations actually hinder the maintenance of the application in certain situations? A naive example with the Java's Hibernate framework would be, that for example (provided I don't have the whole code-base in my head, the project structure is a mess and classes are named with arbitrary names) if I wish to see what's going on in a certain DAO, to see if it actually is doing what it's supposed to do, then instead of traversing backwards up the tree from the point where the data service is invoked (where the tree will end in an interface with no implementation details whatsoever apart from the signature) I have to for example go and look for a configuration XML file to see which class is mapped to said interface as the implementation before being able to access the actual implementation details. Are there any situations where having loose coupling can actually hurt maintainability?

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• What is the name of this array transformation?

  - by Brandon Tilley

  Start with an array of arrays; in this case, they are different lengths in order to demonstrate the technique, but they do not have to be. [[1,2,3,4], [5,6,7], [8,9,10], [11,12,13,14,15]] At the other end of the transformation, you have an array of arrays where the first array contains the first element from each of the original arrays, the second array contains the second element from each of the original arrays, and so on. [[1,5,8,11], [2,6,9,12], [3,7,10,13], [4,14], [15]] Is there a mathematical or CS term for this operation?

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• Anti-depressant and programming: does it reduce your thinking and focusing abilities ?

  - by user12358

  I wanted to ask your opinion on anti-depressants, since I took them daily for 3 years now, but I can't be sure if I'm less perfomant with them or without, since I never withdrawed. I'm still at school at the age of 25, still having some motivation problems (for example I can't get used to do something at school if I don't think it will teach me something), but I'm quite motivated to work in the video-game field, since I have some personnal projects in mind. I know C++ programming etc, I'm still learning techniques, but do you think I should try more to do my project instead of just following the work I'm assigned to ? Have you had experience with depression or anti-depressants ? How did it affect your work ? Do you think that being depressed or half-depressed can improve creativity ? Do you feel it has affected the way you end up writing your algorithms ? EDITED

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• Canon Pixma MP150 printer stops before the job is done

  - by aserwin

  I have a Canon Pixma MP150. It's old but it still works well. The problem is that since I have been running Ubuntu 12.04 the printer exhibits odd behavior. Usually right at the end of a job, it will stop. The printing is done, but the printer is still "working" and it won't release the paper. If I pull it out and test the printer, it will start over and print the same job. Once I just let it be and about an hour or so later it finished with no problems. My question is, could the be an issue with the printer (it is old) or is it the drivers in Ubuntu? Any advice (or suggestions on debugging) would be greatly appreciated as I print a lot and don't really want to buy a new printer.

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• Help writing server script to ban IP's from a list

  - by Chev_603

  I have a VPS that I use as an openvpn and web server. For some reason, my apache log files are filled with thousands of these hack attempts: "POST /xmlrpc.php HTTP/1.0" 404 395 These attack attempts fill up 90% of my logs. I think it's a WordPress vulnerability they're looking for. Obviously they are not successful (I don't even have Wordpress on my server), but it's annoying and probably resource consuming as well. I am trying to write a bash script that will do the following: Search the apache logs and grab the offending IP's (even if they try it once), Sort them into a list with each unique IP on a seperate line, And then block them using the IP table rules. I am a bash newb, and so far my script does everything except Step 3. I can manually block the IP's, but that's tedious and besides, this is Linux and it's perfectly capable of doing it for me. I also want the script to be customizable so that I (or anyone else who wants to use it) can change the variables to suit whatever situation I/they may deal with in the future. Here is the script so far: #!/bin/bash ##IP LIST GENERATOR ##Author Chev Young ##Script to search Apache logs and list IP's based on custom filters ## ##Define our variables: DIRECT=~/Script ##Location of script&where to put results/temp files LOGFILE=/var/log/apache2/access.log ## Logfile to search for offenders TEMPLIST=xml_temp ## Temporary file name IP_LIST=ipstoban ## Name of results file FILTER1=xmlrpc ## What are we looking for? (Requests we want to ban) cd $DIRECT if [ ! -f $TEMPLIST ];then touch $TEMPLIST ##Create temp file fi cat $LOGFILE | grep $FILTER1 >> $DIRECT/$TEMPLIST ## Only interested in the IP's, so: sed -e 's/\([0-9]\+\.[0-9]\+\.[0-9]\+\.[0-9]\+\).*$/\1/' -e t -e d $DIRECT/$TEMPLIST | sort | uniq > $DIRECT/$IP_LIST rm $TEMPLIST ## Clean temp file echo "Done. Results located at $DIRECT/$IP_LIST" So I need help with the next part of the script, which should ban the IP's (incoming and perhaps outgoing too) from the resulting $IP_LIST file. I don't care if it utilizes UFW or IPTables directly, as long as it bans the IP's. I'd probably run it as a cron task. What I'm having trouble with is understanding how to use line of the result file as a seperate variable to do something like: ufw deny $IP1 $IP2 $IP3, ect Any ideas? Thanks.

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• Comment l'Egypte se retrouve-t-elle totalement déconnectée d'Internet ? Le Web mondial en sera-t-il affecté ?

  Comment l'Egypte se retrouve-t-elle totalement déconnectée d'Internet ? Un FAI résiste, Microsoft proteste. Le Web mondial en sera-t-il affecté ? L'information est de taille, et elle fait depuis ce week end la Une de tous les quotidiens du monde : l'Egypte s'est coupée du monde en fermant ses frontières aux connexions Internet. Du jamais vu dans l'histoire du Web : un pays est totalement déconnecté, et ses 80 millions d'habitants se retrouvent dans une bulle, isolés du réseau mondial. Pourquoi une action aussi radicale ? Pour tenter de calmer un soulèvement du peuple, qui se rebelle contre le pouvoir politique en place (le Président Moubarak est à son poste depuis plus de 30 ans...). Comment un tel bl...

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• Cost of Web Server that hosted and delivered text only

  - by slandau

  We are developing an application that needs a web server to interact with the two (or more) entities involved. They will not ever see anything on the web, but the server is required for the transfer of data between them. It's sort of a holding point. Now, the only thing the server is going to be holding is textual data. The two entities are going to be doing the work with the data. I was wondering what the cost of this type of server would be. Since it would be JUST a database with no front end, would it make sense to employ a service through Amazon or Google that just holds data for me to access instead of buying a server and making my own database? The amount of data can grow very large however it's only text, and all data over a day old will be deleted for the most part every day. Thanks!

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• Microphone doesn't give any input, yet music does

  - by user52643

  I've tried a few guides but nothing works as of yet. I've tried two microphones, both of which work on my Vista setup but do nothing on Ubuntu. Nothing is on mute both on the Sound utility or Skype (which I'm trying to use my mic for). I've been informed that when my speakers are playing very load, this can be heard on the other end of a call, too. See link for cat /proc/asound/card0/codec#0 results which are apparently relevant... _' N.B. I am noob x

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• IT User Adoption Survey - UPK Users we need YOU!

  - by user708585

  Oracle UPK is teaming with Neochange, a recognized user adoption leader, to produce the 4th IT Adoption Insight Report Complete the following survey for a chance to win an Apple IPad!* Help develop insight into the challenges and trends occurring in IT Adoption by participating in the 2012 survey. The information gathered is used to prepare the 2012 IT Adoption Insight Report, used by industry leaders to understand challenges and trends in IT Adoption. This year the report focuses on understanding the business impact of various end-user strategies and adoption barriers. This survey should take no more than 15 minutes of your time and each participant will receive a complimentary copy of the report: https://www.surveymonkey.com/s/2012_Adoption_Insight_Report To view the prior report: IT Adoption Insight Report Thank you in advance for your participation! *One Apple iPad will be given away to a randomly selected survey participant who completes the survey by January 15, 2012. The winner will be notified by email by January 31, 2012.

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• FFmpeg multi pass encoding

  - by Levan

  Sorry, I am really new to this, and have problems doing some tasks without help. So I have a terminal command: ffmpeg \ -y \ -i '/media/levan/BEEA60D8EA608E89/Downloads/Videos/Tony Braxton - Un-Break My Heart.VOB' \ -s 1920x1080 \ -aspect 16:9 \ -r 25 \ -b 15550k \ -bt 19792k \ -vcodec libtheora \ -acodec libvorbis \ -ac 2 \ -ar 48000 \ -ab 320k \ ddd.ogg and I want to have 3 pass video in output video, but how do I accomplish this? I found that I must write -pass n command some where, but where to write it I do not know. I tested this and wrote -pass 3 at the end but then the terminal just showed a > symbol.

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• Override a static library's global function

  - by Jason Madux

  Not sure if this question belongs here or on SO, but posting here for now :) I'm trying to override a global function defined in "StaticLib" for my iOS application but the compiler keeps giving me the duplicate symbol error. Relevant code: #import "MyApplication.h" #import "StaticLib.h" NSData* getAllData() { NSLog(@"myGetAllData"); return nil; } @implementation MyApplication ... @end I've looked into Apple's runtime library but that all seems to be class-oriented. Any suggestions or is it just not possible to override global functions from static libraries?

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• Figuring out the Call chain

  - by BDotA

  Let's say I have an assemblyA that has a method which creates an instance of assemblyB and calls its MethodFoo(). Now assemblyB also creates an instance of assemblyC and calls MethodFoo(). So no matter if I start with assemblyB in the code flow or with assemlyA, at the end we are calling that MethodFoo of AssemblyC(). My question is when I am in the MethodFoo() how can I know who has called me? Has it been a call originally from assemblyA or was it from assemlyB? Is there any design pattern or a good OO way of solving this?

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• Integrating feature request functionality directly into the business software you write?

  - by Aaron Anodide

  What are relative merits of something like a button on a piece of custom bizware that says, "press me to ask for a feature" or "click here if something didn't work right". The problem I'm trying to remedy is the general lack of formality surrounding feature requests. Most specifically, the rate at which I receive walk-ups from end-users. Taken one at a time, it can be beneficial, but sometimes it can hinder productivity on the larger scale. Has anyone done something like this and has it been a general success or alternately somewhat a waste of time. My instincts are not giving me a hint here.

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• The Problem Should Define the Process, Not the Tool

  - by thatjeffsmith

  All around awesome tool, but not the only gadget in your toolbox.I’m stepping down from my SQL Developer pulpit today and standing up on my philosophical soap box. I’m frequently asked to help folks transition from one set of database tools over to Oracle SQL Developer, which I’m MORE than happy to do. But, I’m not looking to simply change the way people interact with Oracle database. What I care about is your productivity. Is there a faster, more efficient way for you to connect the dots, get from A to B, or just get home to your kids or to the pub for happy hour? If you have defined a business process around a specific tool, what happens when that tool ‘goes away?’ Does the business stop? No, you feel immediate pain until you are able to re-implement the process using another mechanism. Where I get confused, or even frustrated, is when someone asks me to redesign our tool to match their problem. Tools are just tools. Saying you ‘can’t load your data anymore because XYZ’ isn’t valid when you could easily do that same task via SQL*Loader, Create Table As Selects, or 9 other different mechanisms. Sometimes changes brings opportunity for improvement in the process. Don’t be afraid to step back and re-evaluate a problem with a fresh set of eyes. Just trying to replicate your process in another tool exactly as it was done in the ‘old tool’ doesn’t always make sense. Quick sidebar: scheduling a Windows program to kick off thousands if not millions of table inserts from Excel versus using a ‘proper’ server process using SQL*Loader and or external tables means sacrificing scalability and reliability for convenience. Don’t let old habits blind you to new solutions and possibilities. Of couse I’m not going to sit here and say that our tools aren’t deficient in some areas or can’t be improved upon. But I bet if we work together we can find something that’s not only better for the business, but is also better for you. What do you ‘miss’ since you’ve started using SQL Developer as your primary Oracle database tools? I’d love to start a thread here and share ideas on how we can better serve you and your organizations needs. The end solution might not look exactly what you have in mind starting out, but I had no idea I’d be a Product Manager when I started college either What can you no longer ‘do’ since you picked up SQL Developer? What hurts more than it should? What keeps you from being great versus just good?

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• Organization &amp; Architecture UNISA Studies &ndash; Chap 13

  - by MarkPearl

  Learning Outcomes Explain the advantages of using a large number of registers Discuss the way in which compilers optimize register usage Discuss the evolution of CISC machines Describe the characteristics of RISC architecture Discuss the RISC vs. CISC controversy Describe the way in which RISC and CISC design principles can be combined Instruction Execution Characteristics To understand the the line of reasoning of RISC advocates, we need a brief overview of instruction execution characteristics. These include… Operations Operands Procedure Calls These three sections can be studied in depth in the textbook at pages 503 - 505 A number of groups have come up with the conclusion that the attempt to make the instruction set architecture closer to HLLs (High Level Languages) is not the most effective design strategy. Rather HLL’s can be best supported by optimizing performance of the most time-consuming features of typical HLL programs. Generally 3 main characteristics came up to improve performance… Use a large number of registers or use a compiler to optimize register usage Careful attention needs to be paid to the design of instruction pipelines A simplified (reduced) instruction set is indicated The use of a large register optimization One of the most important design principles of RISC machines is the use of a large number of registers. The concept of register windows and the use of a large register file versus the use of cache memory are discussed. On the face of it, the use of a large set of registers should decrease the need to access memory. The design task is to organize the registers in such a fashion that this goal is realized. Read page 507 – 510 for a detailed explanation. Compiler-based register optimization   Reduced Instructions Set Architecture There are two advantages to smaller programs… Because the program takes up less memory, there is a savings in that resource (this was more compelling when memory was more expensive) Smaller programs should improve performance, and this will happen in two ways – fewer instructions means fewer instruction bytes to be fetched and in a paging environment smaller programs occupy fewer pages, reducing page faults. Certain characteristics are common to RISC processors… One instruction per cycle Register-to-register operations Simple addressing modes Simple instruction formats RISC vs. CISC After initial enthusiasm for RISC machines, there has been a growing realization that RISC designs may benefit from the inclusion of some CISC features CISC designs may benefit from the inclusion of some RISC features

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• Preparing For TechEd

  - by Tim Murphy

  This being my first time going to TechEd and I want to make sure that I get the most out of it.  The first goal is to make sure that I get to the sessions that cover as many topics as possible.  This is important for me as a Solution Architect consultant specializing in Microsoft technologies.  To this end I have spent some time going through the sessions on the myTechEd site. The other reason for the trip is to connect with the Microsoft development community.  This includes both members of my local Midwest community and the global communities that I have only had online connections with.  Sharing the experience and getting a chance to exchange ideas with new and old friends is a great part of any convention. In any case, the time is getting close and I am looking forward to the trip. del.icio.us Tags: TechEd 2012,TechEd,community

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• Ubiquity is not recognizing existing partition while trying to install Ubuntu alongside Windows 7

  - by Bertner

  So I'm using Ubuntu live CD to install Ubuntu next to Windows 7 but it doesn't recognize partitions. Here is sudo fdisk -l: Disk /dev/sda: 640.1 GB, 640135028736 bytes 255 heads, 63 sectors/track, 77825 cylinders, total 1250263728 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 4096 bytes I/O size (minimum/optimal): 4096 bytes / 4096 bytes Disk identifier: 0x0c7a859b Device Boot Start End Blocks Id System /dev/sda1 63 1250259631 625129784+ f W95 Ext'd (LBA) Partition 1 does not start on physical sector boundary. /dev/sda2 * 81920 4177919 2048000 b W95 FAT32 /dev/sda3 4177920 147535871 71678976 7 HPFS/NTFS/exFAT /dev/sda5 147538608 1147859631 500160512 7 HPFS/NTFS/exFAT I have one partition with Windows 7, one with its created partition (OS) and one for data.

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• Oracle Endeca Training UK - April 10th, 11th

  - by Grant Schofield

  By popular demand we have decided to hold a second Oracle Endeca Information Discovery Training event in the UK to accommodate those who were unable to get into the first. Training is currently being planned for early May in Switzerland, end of May in Germany and mid-June in Istanbul at the EMEA BI annual event. Date: 10th - 11th April Venue: Oracle Reading, UK A registration link will be sent out shortly, but to avoid disappointment please bookmark this article and block these two days in your diary. You can also register interest by emailing me directly and I will operate a first come, first serve policy - [email protected]

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• Increase Servers folder depth limit for running scripts?

  - by MeltingDog

  I have a CMS on my site that utilises TinyMCE (the WYSIWYG text editor). The issue is that TinyMCE cannot browse for files (example: images) on the web server. I get the error: Error 324 (net::ERR_EMPTY_RESPONSE): The server closed the connection without sending any data. I have been told this may be occurring because the server is configured to limit the folder depth for running scripts. Unfortunately I am primarily a front end developer so I am not really sure how to go about changing/viewing this. I have access to WHM and cPanel. Does anyone know how to adjust this?

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• Headsprings MVC Boot Camp now covers MVC 2 April 21, 22, 23

  Sign up here for Headspring popular boot camp class.  The April boot camp cover ASP.NET MVC (version 1 and 2).  Jimmy Bogard, principal consultant and author, is the trainer for this class, and Jeffrey Palermo (me) is the assistant trainer.  If you employer sends 3 or more there is a discount, so be sure to ask about that. This is a very hands-on class, hence the name boot camp.  Your brain will be fatigued at the end of every day.  The material comes directly from how Headspring...Did you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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• All windows decorations disappear after I maximize any window

  - by korda

  When I maximize some of the windows all decorations disappear (by all, I mean on all windows)... Is that common issue on Unity or I'm just unlucky to have some prone to that bug configuration? Anyone have idea how to fix this? It won't fix after unmaximize. It seems like maximazing window simply crashes window decorator. Decoration isn't displayed for all existing windows and any new ones. Only way I found to fix this is to run compiz --replace (but this ruins current windows placement - all windows end up on same desktop). It happens almost every time I maximize window.

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• Creating Objects

  - by user1424667

  I have a general coding standard question. Is it bad practice to initialize and create an object in multiple methods depending on the outcome of a users choice. So for example if the user quits a poker game, create the poker hand with the cards the user has received, even if < 5, and if the user played till the end create object to show completed hand to show outcome of the game. The key is that the object will only be created once in actuality, there are just different paths and parameters is will receive depending on if the user folded, or played on to the showdown.

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• dpkg reports error on package icaclient

  - by Photonics1

  I installed the icaclient (it's a client for Citrix) a while back. I don't exactly remember what I did to get it working but it was enervating. I had to install some old packages not even avaiable for ubuntu (12.04) and in the end I used some stuff from old rpms. Anyway the client is more or less working now but I always get a dpkg error when installing or updating something. The (translated) error message is something like: dpkg: Error while processing icaclient:i386 (--configure): subprocess installed post-installation-script return errorcode 2 I just want to tell dpkg to ignore this or remove this post-install-script but I don't know how. Thanks!

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• Simulate 'Shock absorbtion' with tire rubber in PhysX (2.8.x)

  - by Mungoid

  This is a kinda tricky question and I fear there is no easy enough solution, but I figured I'd hit SE up before giving up on it and just doing what I can. A machine I am working on has no suspension or shocks or springs of any sort in the real machine, so you would think that when it drives over bumps, it would shake like crazy but because its tires (6 of them) are quite large they seem to absorb a lot of shock from the bumps. Part of this is because the machine is around 30k lbs and it just smashes/compresses any bumps in the ground down (This is another issue im still working on) and the other part is that the tires seem to have a lot of flex to them with a lot of air as well. So my current task is to simulate shock absorption in physx without visibly separating the tires from the spindle/axle.. I have been messing with all kinds of NxMaterial, NxSpring, Joints, etc. and have had no luck getting this to work. The main problem is that the spindle attached to the tire is directly in the center and the axle is basically solidly attached to the chassis, so if i give it any spring or suspension travel, that spindle on the tires will move upwards or downwards, looking very odd because now its not any longer in the center of the tire. I tried giving it a higher restitution but that just makes it bouncy without any shock absorption. Another avenue I am messing with is to actively smooth the terrain in front of the tires so that before it hits a bumpy patch, that patch is smoothed and it doesn't bounce. The only issue with this is that it is pretty expensive to do with 6 tires, high tesselation of the terrain and other complex things going on at the same time in this simulation. I am still working on this but I am hoping to mix and match a few different aspects to get the best possible outcome. This is a bit of a complex issue so I'm not expecting anyone to have a definitive answer, just hoping someone may think of something I haven't =-) -Side note: Yes i know PhysX 2.8.x is quite outdated but we have to stick with it for this implementation. We are in the process of going to another physics engine but it is out of scope to apply that engine to this project.

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