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  • .screenrc - multiple regions on launch

    - by Rob B
    I know it's possible, but I can't for the life of me figure out how, to launch screen with one window in split region mode? ie: I have screen set to open multiple windows on launch, but want window 0 to be split into two regions with an application running in each region

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  • Are there any well known anti-patterns in the field of system administration?

    - by ojblass
    I know a few common patterns that seem to bedevil nearly every project at some point in its life cycle: Inability to take outages Third party components locking out upgrades Non uniform environments Lack of monitoring and alerting Missing redundancy Lack of Capacity Poor Change Management Too liberal or tight access policies Organizational changes adversely blur infrastructure ownership I was hoping there is some well articulated library of these anti-patterns summarized in a book or web site. I am almost positive that many organizations are learning through trial by fire methods. If not let's start one.

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  • How do I turn on basic HTTP-auth for a page in jboss?

    - by Electrons_Ahoy
    I'm setting up a jboss server for testing some java code that talks to http servers. That's pretty easy. However one of the things I'm testing is interfacing with classic "old-school" HTTP-Auth protected pages, and for the life of me I can't figure out how to turn that on in jboss (and my google-fu seems to have let me down.) So, how do I add a basic username and password to a single html (or jsp) file in jboss using http Basic Access Authentication?

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  • Skype + webcam recommendations

    - by jamie
    I'm looking for a webcam for use with Skype which has a built in microphone. I specifically want to be able to use the microphone in the camera when i'm taking calls which aren't video calls on skype. Are they any that do this? Does the microsoft H5D Life Camera do this? The operating environment is windows 7 64 bit.

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  • Cost of running colour laser printers.

    - by Ian Ringrose
    Has anyone got a good list of the costs of running colour laser printers, both for colour and black that take into account different usage volumes. E.g if the dram needs replacing after 20,000 pages, but I am only do 10,000 in the next 3 years, I don’t care about the cost of a new dram. So a simple “cost per page” figure is each printer is not good enough to be useful in real life. (A spread sheet / website that I could type my own usage values into would be great.)

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  • How it was detected if last ACK lost in TCP connection termination procedure?

    - by sonali
    In TCP Connection Termination, when client enters in TIME_WAIT state means the client waits for a period of time equal to double the maximum segment life (MSL) time, to ensure the ACK it sent was received. (I read above from a book computer networking by kurose and also given in following URL http://www.tcpipguide.com/free/t_TCPConnectionTermination-2.htm ) But how it was detected if last ACK(send by client as a response to server FIN) lost?

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  • How to get the Vista taskbar to span multiple monitors?

    - by NoCarrier
    I can't for the life of me get the vista taskbar to span multiple monitors. I've searched and looked far and wide, and alas the only pseudo-solution i can find is Ultra-Mon, but a) it doesn't quite look the same and b) i don't want to have to pay for something that Windows really ought to be able to do out of the box. Does anyone have a solution for this? Will this get addressed in Windows 7?

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  • SFTP "Could not connect to server error"

    - by Ash
    I'm having problems connecting to my server via SFTP. I can SSH in to the system perfectly fine, but for some odd reason, i'm not able to SFTP (which I used to be able to). I have cleared ALL my iptables rules iptables -F still no access. I have removed the sub system (to allow FULL access) still no access. I can't for the life of me figure out what the problem is. Thus is therefore making a solution impossible.

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  • Rewrite rules for Drupal Boost with Lighttpd

    - by bsdjunkie
    I have been given the super task of preparing a web site to get hammered.... Or site is drupal based, I have found what could be my answer in the form of Boost. But I can't for the life of me find any information on the Lighttpd rewrite rules to make it function. All suggestion welcome! Thanks

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  • Quick method to determine SSD drive health?

    - by ewwhite
    I have an Intel X-25M drive that was marked "failed" twice in a ZFS storage array, as noted here. However, after removing the drive, it seems to to mount, read and write in other computers (Mac, PC, USB enclosure, etc.) Is there a good way to determine the drive's present health? I feel that the previous failure in the ZFS solution was the convergence of bugs, bad error reporting and hardware. It seems like this drive may have some life in it, though.

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  • How do I find a bigger battery for my laptop?

    - by KeyStroke
    Hi, I have an ASUS K42JR laptop, and the battery life in this thing sucks (2 hours max). I'd like to get a bigger battery for it, and I've found a bunch online, but I have no idea which one fits/works with my laptop. Any idea how I can find that out? and which site do you recommend I buy it from? Your help is much appreciated

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  • Convert NSString to CFURLRef

    - by carloe
    How can I convert a NSString that contains an absolute path to a file to a CFURLRef? I tried CFURLRef myFileUrl = CFURLCreateWithString(kCFAllocatorDefault, (CFStringRef)filePathString, NULL); and about half a dozend other ways.

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  • RadioButton text alignment

    - by melling
    For some reason the text on each of my RadioButtons is raised, almost to the level of a superscript (ok maybe half way there). How do I set the text to align so that if I could draw a line through the center of the button and have it intersect with the center point of the text? * Button1 * Button2

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  • How to handle Android SimpleExpandableListAdapter entry selection.

    - by DaveG
    I have created an expandable list in my Android application using the SimpleExpandableListAdapter type. But I'm at a complete loss as to how I detect events when one of the child entries has been selected/clicked. I've tried all the usual OnClickListener/OnChildClickListener etc, but can't seem to find (by experimentation, or half an hour googling) what the correct handler routines should be. Any help greatfully appreciated.

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  • Parsing a given binary tree using python?

    - by kaushik
    Parse a binary tree,referring to given set of features,answering decision tree question at each node to decide left child or right child and find the path to leaf node according to answer given to the decision tree.. input wil be a set of feature which wil help in answering the question at each level to choose the left or right half and the output will be the leaf node.. i need help in implementing this can anyone suggest methods?? Please answer... thanks in advance..

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  • Job Scheduler with asp.net mvc

    - by sanfra1983
    Every 30 minutes their server generates an XML file with product inside, so my site every half hour would make a request to the URL given to me, their server will generate the XML list updated and will importarselo automatically to update our site. Does anyone have an idea of how you can implement in asp.net mvc?

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  • UIWebView paging / line cut off

    - by John
    Hi, I am trying to page a webpage, so disable scrolling, then the second page is the same webpage scrolled down the page height. The problem I have is that the bottom of the first page often has 1/2 a line of text, then the second page has the bottom half of the line. Is there a way to ensure the entire line falls on one of the pages? Similar to Stanza etc? Thanks

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  • Scala n00b: Critique my code

    - by Peter
    G'day everyone, I'm a Scala n00b (but am experienced with other languages) and am learning the language as I find time - very much enjoying it so far! Usually when learning a new language the first thing I do is implement Conway's Game of Life, since it's just complex enough to give a good sense of the language, but small enough in scope to be able to whip up in a couple of hours (most of which is spent wrestling with syntax). Anyhoo, having gone through this exercise with Scala I was hoping the Scala gurus out there might take a look at the code I've ended up with and provide feedback on it. I'm after anything - algorithmic improvements (particularly concurrent solutions!), stylistic improvements, alternative APIs or language constructs, disgust at the length of my function names - whatever feedback you've got, I'm keen to hear it! You should be able to run the following script via "scala GameOfLife.scala" - by default it will run a 20x20 board with a single glider on it - please feel free to experiment. // CONWAY'S GAME OF LIFE (SCALA) abstract class GameOfLifeBoard(val aliveCells : Set[Tuple2[Int, Int]]) { // Executes a "time tick" - returns a new board containing the next generation def tick : GameOfLifeBoard // Is the board empty? def empty : Boolean = aliveCells.size == 0 // Is the given cell alive? protected def alive(cell : Tuple2[Int, Int]) : Boolean = aliveCells contains cell // Is the given cell dead? protected def dead(cell : Tuple2[Int, Int]) : Boolean = !alive(cell) } class InfiniteGameOfLifeBoard(aliveCells : Set[Tuple2[Int, Int]]) extends GameOfLifeBoard(aliveCells) { // Executes a "time tick" - returns a new board containing the next generation override def tick : GameOfLifeBoard = new InfiniteGameOfLifeBoard(nextGeneration) // The next generation of this board protected def nextGeneration : Set[Tuple2[Int, Int]] = aliveCells flatMap neighbours filter shouldCellLiveInNextGeneration // Should the given cell should live in the next generation? protected def shouldCellLiveInNextGeneration(cell : Tuple2[Int, Int]) : Boolean = (alive(cell) && (numberOfAliveNeighbours(cell) == 2 || numberOfAliveNeighbours(cell) == 3)) || (dead(cell) && numberOfAliveNeighbours(cell) == 3) // The number of alive neighbours for the given cell protected def numberOfAliveNeighbours(cell : Tuple2[Int, Int]) : Int = aliveNeighbours(cell) size // Returns the alive neighbours for the given cell protected def aliveNeighbours(cell : Tuple2[Int, Int]) : Set[Tuple2[Int, Int]] = aliveCells intersect neighbours(cell) // Returns all neighbours (whether dead or alive) for the given cell protected def neighbours(cell : Tuple2[Int, Int]) : Set[Tuple2[Int, Int]] = Set((cell._1-1, cell._2-1), (cell._1, cell._2-1), (cell._1+1, cell._2-1), (cell._1-1, cell._2), (cell._1+1, cell._2), (cell._1-1, cell._2+1), (cell._1, cell._2+1), (cell._1+1, cell._2+1)) // Information on where the currently live cells are protected def xVals = aliveCells map { cell => cell._1 } protected def xMin = (xVals reduceLeft (_ min _)) - 1 protected def xMax = (xVals reduceLeft (_ max _)) + 1 protected def xRange = xMin until xMax + 1 protected def yVals = aliveCells map { cell => cell._2 } protected def yMin = (yVals reduceLeft (_ min _)) - 1 protected def yMax = (yVals reduceLeft (_ max _)) + 1 protected def yRange = yMin until yMax + 1 // Returns a simple graphical representation of this board override def toString : String = { var result = "" for (y <- yRange) { for (x <- xRange) { if (alive (x,y)) result += "# " else result += ". " } result += "\n" } result } // Equality stuff override def equals(other : Any) : Boolean = { other match { case that : InfiniteGameOfLifeBoard => (that canEqual this) && that.aliveCells == this.aliveCells case _ => false } } def canEqual(other : Any) : Boolean = other.isInstanceOf[InfiniteGameOfLifeBoard] override def hashCode = aliveCells.hashCode } class FiniteGameOfLifeBoard(val boardWidth : Int, val boardHeight : Int, aliveCells : Set[Tuple2[Int, Int]]) extends InfiniteGameOfLifeBoard(aliveCells) { override def tick : GameOfLifeBoard = new FiniteGameOfLifeBoard(boardWidth, boardHeight, nextGeneration) // Determines the coordinates of all of the neighbours of the given cell override protected def neighbours(cell : Tuple2[Int, Int]) : Set[Tuple2[Int, Int]] = super.neighbours(cell) filter { cell => cell._1 >= 0 && cell._1 < boardWidth && cell._2 >= 0 && cell._2 < boardHeight } // Information on where the currently live cells are override protected def xRange = 0 until boardWidth override protected def yRange = 0 until boardHeight // Equality stuff override def equals(other : Any) : Boolean = { other match { case that : FiniteGameOfLifeBoard => (that canEqual this) && that.boardWidth == this.boardWidth && that.boardHeight == this.boardHeight && that.aliveCells == this.aliveCells case _ => false } } override def canEqual(other : Any) : Boolean = other.isInstanceOf[FiniteGameOfLifeBoard] override def hashCode : Int = { 41 * ( 41 * ( 41 + super.hashCode ) + boardHeight.hashCode ) + boardWidth.hashCode } } class GameOfLife(initialBoard: GameOfLifeBoard) { // Run the game of life until the board is empty or the exact same board is seen twice // Important note: this method does NOT necessarily terminate!! def go : Unit = { var currentBoard = initialBoard var previousBoards = List[GameOfLifeBoard]() while (!currentBoard.empty && !(previousBoards contains currentBoard)) { print(27.toChar + "[2J") // ANSI: clear screen print(27.toChar + "[;H") // ANSI: move cursor to top left corner of screen println(currentBoard.toString) Thread.sleep(75) // Warning: unbounded list concatenation can result in OutOfMemoryExceptions ####TODO: replace with LRU bounded list previousBoards = List(currentBoard) ::: previousBoards currentBoard = currentBoard tick } // Print the final board print(27.toChar + "[2J") // ANSI: clear screen print(27.toChar + "[;H") // ANSI: move cursor to top left corner of screen println(currentBoard.toString) } } // Script starts here val simple = Set((1,1)) val square = Set((4,4), (4,5), (5,4), (5,5)) val glider = Set((2,1), (3,2), (1,3), (2,3), (3,3)) val initialBoard = glider (new GameOfLife(new FiniteGameOfLifeBoard(20, 20, initialBoard))).go //(new GameOfLife(new InfiniteGameOfLifeBoard(initialBoard))).go // COPYRIGHT PETER MONKS 2010 Thanks! Peter

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