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• How to add support for the JPEG image format

  - by Samir Sabri

  After installing Imagemagick, I've tested it with jpg image, like this: identify 1.jpg But, I got this result: identify: no decode delegate for this image format `1.jpg' @ error/constitute.c/ReadImage/550. Then, I tried to add support for JPEG format by: yum install libjpeg libjpeg-devel but, I got: Setting up Install Process No package libjpeg available. No package libjpeg-devel available. Nothing to do I thought I need to update the apt-get, I did: apt-get install libjpeg libjpeg-devel but, I got: Reading package lists... Done Building dependency tree Reading state information... Done E: Unable to locate package libjpeg E: Unable to locate package libjpeg-devel Is there an easy way to get those libraries installed ? I am using Ubuntu 12.04.

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• Distinguishing the Transport Layer from the Session Layer

  In the OSI communications model, the Session layer manages the creation and removal of the association between two communicating network end points. This can also be called a connection. A connection is maintained while the network end points are communicated between each other in a conversation or session of some unknown length of time. Some connections and sessions only need to last long enough to send a message or a piece of data in one direction. In addition, some sessions may last longer, this typically occurs when one or both of the network end points are  able to terminate it the connection. The transport layer ensures that messages/data are delivered without errors, in sequence, and with no data content losses or data content duplications. It relieves the Session Layer from any concern with the transfer of data between them and their peers. Examples: Session Layer This layer acts like a manager and asks one of its employees (Transport Layer) to move a piece of data/message from one network end-point to another. Transportation Layer This layer takes the request of the Session Layer and moves the data as insturcted, it also double checks the data for any missing or corrupted information after it has been moved. If for some reason the new data does not match the old data then the Transport player will attempt to move the data gain until the data at both locations is in sync.

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• How to install packages which apt-get can't find?

  - by newcomer

  Hi, I need these packages to build Android source. But I am getting this error: $ sudo apt-get install git-core gnupg flex bison gperf build-essential zip curl zlib1g-dev gcc-multilib g++-multilib libc6-dev-i386 lib32ncurses5-dev ia32-libs x11proto-core-dev libx11-dev lib32readline5-dev lib32z-dev [sudo] password for asdf: Reading package lists... Done Building dependency tree Reading state information... Done E: Unable to locate package libc6-dev-i386 E: Unable to locate package lib32ncurses5-dev E: Unable to locate package ia32-libs E: Unable to locate package lib32readline5-dev E: Unable to locate package lib32z-dev I tried to download & install say libc6-dev-i386 debian package form here. But when I double click on the .deb file Ubuntu Software Manager says wrong architecture 'amd64'. (My OS: Ubuntu 10.10 (updated), Processor: AMD phenom II.)

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• What is the best way to keep track of the median?

  - by Steven Mou

  I read a question in one book: Numbers are randomly generated and stored into an (expanding) array, How would you keep track of the median? There are two data structures can solve the problem. One is the balanced binary tree, the other is two heaps which keep trace of the biggest half and the smallest half of the elements. I think these two solutions has the same running time as O(n lg n), but I am not sure of my judgement. In your opinions, What is the best way to keep track of the median?

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• Looking for someone to point me in the right direction. I want to learn how to use hosted servers

  - by Leisure

  TL;DR: I want a Java program to run on a server, I want the server to forward a particular port from external to internal IP, I want store a few files on the server. Guides please. So I made a hack job Java program that acts as a server for my android application. It stores data in text files and HTML files, uploads them via FTP to my webhost, and manages socket connections (using port forwarding) with any phones connected. Right now I'm running it on NetBeans on my home computer. I know that it will probably slow down or crash once about 50 phones are connected at once. Is there any way I can run this program on a server with a high bandwidth? Can someone please find me a guide for that? I'm noob and don't know where to start looking. I seriously don't know anything about renting or using servers - I need a nice guide, and recommendations. My requirements for the server: Can handle about 2k socket connections at once Can run my Java code and store my txt files Can give me a port and an IP address so TCP/IP clients can be connected My budget: $50 CAD per month. Please someone set my ship sailing in the right direction, I really don't know where to look for resources.

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• Creating A Simple Bash Script With Multiple Commands

  - by unorthodox grammar

  Trying to create a bash script that opens gnome-terminal, and then runs ls to display the contents of a directory, but it just opens gnome-terminal. I will be creating some other scripts that also use multiple commands. My script: #!/bin/bash gnome-terminal ls -a /examplefolder EDIT: To clarify what I'm trying to achieve. I'm trying to create a script that will open gnome-terminal, list the contents of /examplefolder, and then be ready for regular terminal usage. Is this possible, or am I barking up the wrong tree?

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• Seeking a free Lint for C which programmers will *want* to use

  - by Mawg

  When I try to persuade others to Lint their code I always get excuses - too difficult to set up, too difficult to understand, false positives, etc (most of which translates to too lazy, too stupid or too afraid of new things). Is there any way that I can make Linting easier? We code in C using Netbeans. Can I incorporate Splint into Netbeans? I did find a Splint GUI which was quite good, but there was no way to lint a directory tree. Any ideas? Thanks in advance

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• How to remove the old driver for Canon MX870 and install a new one?

  - by madjoe

  I am using 12.04. In addition to Canon MX870 printer only shows "Processing" on the status LCD, I'm not sure if I successfully removed the old MX870 driver (I removed it by using Ubuntu Software Center), then I added a new PPA, apt-get update and then: $ sudo add-apt-repository ppa:michael-gruz/canon-trunk $ sudo apt-get update $ sudo apt-get install cnijfilter-mx870series Reading package lists... Done Building dependency tree Reading state information... Done Package cnijfilter-mx870series is not available, but is referred to by another package. This may mean that the package is missing, has been obsoleted, or is only available from another source E: Package 'cnijfilter-mx870series' has no installation candidate How could I resolve this?

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• CloudMail

  - by kaleidoscope

  In Web Applications, we often come across requirement of sending and receiving emails through our application. So same can be for the applications hosted on Azure. So Do you want to send email from an application hosted on Azure? CloudMail is one of the possible answers. CloudMail is designed to provide a small, effective and reliable solution for sending email from the Azure platform directly addressing several problems that application developers face. Microsoft does not provide an SMTP Gateway (yet) so the application is forced to connect directly to one hosted somewhere else, on another network. So to implement such functionality one of the possible option is using Free email providers. This might be fine for testing, but do you really want to rely on a free service in production? There can be other issues with this approach like if your chosen SMTP gateway is down or there are connection problems? Again there can be some specific requirement that, you want to send email via a company’s mail server, from inside their firewall. CloudMail solves these problems by providing a small client library that you can use in your solution to send emails from you application and a Windows Service that you run inside your companies network that acts as a relay. Because the send and relay are disconnected there are no lost emails and you can send from your own SMTP Gateway.   CloudMail is in its Beta version and available for download here.   Technorati Tags: Geeta,Azure Email,CloudMail

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• Why don't I have a loop error with these redirects?

  - by byronyasgur

  I know this may seem a bit of a question in reverse, but I actually don't seem to have a problem I just want to make sure before I proceed. I have 2 domains domain1.com and domain2.com and a directory my_directory at domain2.com. I have domain2.com setup as an "add on domain" in the cpanel account of domain1.com so that when I go to domain2.com I am taken to domain1.com/my_directory but the browser shows domain2.com in the addressbar so it looks and acts like and is a separate site. However when people browse to domain1.com/directory I want the address bar to show domain2.com not domain1.com/directory. So I put a redirect in the htaccess file to redirect domain1.com/directory to domain2.com and it works perfectly, but I think it shouldnt and I'm worried I've done something wrong. My question is this: domain2.com was already redirected to domain1.com/directory in the first place (I see the redirect in my cpanel under addon domains) so by adding the second redirect in the htaccess file I should be creating a loop! Could somebody please set my mind at rest and show me why not?

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• Processing component pools problem - Entity Subsystem

  - by mani3xis

  Architecture description I'm creating (designing) an entity system and I ran into many problems. I'm trying to keep it Data-Oriented and efficient as much as possible. My components are POD structures (array of bytes to be precise) allocated in homogeneous pools. Each pool has a ComponentDescriptor - it just contains component name, field types and field names. Entity is just a pointer to array of components (where address acts like an entity ID). EntityPrototype contains entity name and array of component names. Finally Subsystem (System or Processor) which works on component pools. Actual problem The problem is that some components dependents on others (Model, Sprite, PhysicalBody, Animation depends on Transform component) which makes a lot of problems when it comes to processing them. For example, lets define some entities using [S]prite, [P]hysicalBody and [H]ealth: Tank: Transform, Sprite, PhysicalBody BgTree: Transform, Sprite House: Transform, Sprite, Health and create 4 Tanks, 5 BgTrees and 2 Houses and my pools will look like: TTTTTTTTTTT // Transform pool SSSSSSSSSSS // Sprite pool PPPP // PhysicalBody pool HH // Health component There is no way to process them using indices. I spend 3 days working on it and I still don't have any ideas. In previous designs TransformComponent was bound to the entity - but it wasn't a good idea. Can you give me some advices how to process them? Or maybe I should change the overall design? Maybe I should create pools of entites (pools of component pools) - but I guess it will be a nightmare for CPU caches. Thanks

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• Android Emulator - Ubuntu 12.04

  - by Aneesh karthik C

  When I type in the command @emulator Andreud where 'Andreud' is the name of the emulator I created. It gives the following errors and a blank screen in which I should get android home screen, icons, etc shows up. PVRDRIInitPVR2D: PVR2D device index (0)Failed to load libGL.so error libGL.so: cannot open shared object file: No such file or directory Failed to load libGL.so error libGL.so: cannot open shared object file: No such file or directory As per a comment I tried installing ia32-libs aneesh@nb14:~$ sudo apt-get install ia32-libs Reading package lists... Done Building dependency tree Reading state information... Done Package ia32-libs is not available, but is referred to by another package. This may mean that the package is missing, has been obsoleted, or is only available from another source E: Package 'ia32-libs' has no installation candidate I want the home screen to appear. Any help is greatly appreciated.

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• Why are the packages found with apt-get always horribly out of date?

  - by Andrew

  Whenever I use the package manager, it can only ever find really old versions of stuff. Example: sudo apt-get update sudo apt-get install postgresql The best it can do is version 8.4 (3 years out of date). Trying to get a later version, I get: $ sudo apt-get install postgresql-9.1 Reading package lists... Done Building dependency tree Reading state information... Done E: Couldn't find package postgresql-9.1 I experience the same issue whenever I use the package manager, so I usually just download and build things from source. How can I make it find up-to-date software?

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• Need help installing Wine onto Ubuntu 12.10x64

  - by user106241

  I have tried to install wine through the software center and terminal and I get this error. chris@ubuntu:~$ sudo apt-get install wine1.5 [sudo] password for chris: Reading package lists... Done Building dependency tree Reading state information... Done Some packages could not be installed. This may mean that you have requested an impossible situation or if you are using the unstable distribution that some required packages have not yet been created or been moved out of Incoming. The following information may help to resolve the situation: The following packages have unmet dependencies: wine1.5 : Depends: wine1.5-i386 (= 1.5.16-0ubuntu1) but it is not installable Recommends: gnome-exe-thumbnailer but it is not going to be installed or kde-runtime but it is not going to be installed Recommends: ttf-droid Recommends: ttf-mscorefonts-installer but it is not going to be installed Recommends: ttf-umefont but it is not going to be installed Recommends: ttf-unfonts-core but it is not going to be installed Recommends: winbind but it is not going to be installed Recommends: winetricks but it is not going to be installed E: Unable to correct problems, you have held broken packages.

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• Wordpress .htaccess preventing subfolder access

  - by John K.

  This is sort of a goofy setup, but it's not in my power to reconfigure it at this time. I'm running in a shared hosting environment. The domain is example.com. This is an add-on domain on the host side with example.com being redirected to the www/example.com sub-directory. That directory houses a standard Wordpress site which acts as the main site when you visit example.com. The .htaccess file within that directory is: # BEGIN WordPress <IfModule mod_rewrite.c> RewriteEngine On RewriteBase / RewriteRule ^index\.php$ - [L] RewriteCond %{REQUEST_FILENAME} !-f RewriteCond %{REQUEST_FILENAME} !-d RewriteRule . /index.php [L] </IfModule> # END WordPress <IfModule mod_rewrite.c> RewriteEngine On RewriteRule ^wp-admin/profile\.php$ /ssm/welcome [R] </IfModule> I have a subdirectory, at the root level with the /example.com subdirectory that houses a cake php application. That subdirectory is /tracker. My problem is that when I attempt to browse to example.com/tracker, I get a 404 from Wordpress because perma links are on. What I think I need is a rewrite rule in the Wordpress .htaccess file that short circuits the existing rewrite rules and permits example.com/tracker to work independently of the Wordpress install. Or a rewrite rule at the root level that short circuits the redirect to the /example.com directory in the first place. Not sure how well I explained that so here's a summary. The www/ directory structure: example.com/ tracker/ Add on domain of www.example.com redirecting to the /example.com directory with Wordpress and a tracker/ directory running CakePHP which I would like to access via www.example.com/tracker. If you need further info or clarification let me know!

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• problem in installing wireshark on ubuntu 12.04

  - by iqbal

  i tried to install wireshark on ubuntu 12.04 but when i enter the cod the message is whone to me is iqbal@iqbal-HP-ProBook-4530s:~$ sudo apt-get install wireshark Reading package lists... Done Building dependency tree Reading state information... Done Some packages could not be installed. This may mean that you have requested an impossible situation or if you are using the unstable distribution that some required packages have not yet been created or been moved out of Incoming. The following information may help to resolve the situation: The following packages have unmet dependencies: wireshark : Depends: wireshark-common (= 1.11.4+svn20140420104827~d0489f2a-0ubuntu1~precise1~ppa0) but it is not going to be installed E: Unable to correct problems, you have held broken packages so how can i install wireshark on ubuntu 12.04 if any one can please tell me thanks

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• How can I install canon pixma ip100 driver for Ubuntu 12.04LTS 64bit?

  - by kina

  I tried installing the driver by typing the following commands in the terminal: sudo add-apt-repository ppa:michael-gruz/canon - the result was the following: You are about to add the following PPA to your system: More info: https://launchpad.net/~michael-gruz/+archive/canon Press [ENTER] to continue or ctrl-c to cancel adding it Then I typed: sudo apt-get update - the result was the following: Executing: gpg --ignore-time-conflict --no-options --no-default-keyring --secret-keyring /tmp/tmp.HDuHmOSJ0l --trustdb-name /etc/apt/trustdb.gpg --keyring /etc/apt/trusted.gpg --primary-keyring /etc/apt/trusted.gpg --keyserver hkp://keyserver.ubuntu.com:80/ --recv 84E550CD36EC35430A66AC5A03396E1C3F7B4A1D gpg: requesting key 3F7B4A1D from hkp server keyserver.ubuntu.com gpg: key 3F7B4A1D: "Launchpad Misakovi" not changed gpg: Total number processed: 1 gpg: unchanged: 1 I typed the next command: sudo apt-get install cnijfilter-ip100series The return response was: Reading package lists... Done Building dependency tree Reading state information... Done E: Unable to locate package cnijfilter-ip100series Does anyone know the solution? Kina

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• Eclipse not launching

  - by user274959

  I have installed Ubuntu 14.04, I have installed Eclipse using Ubuntu Software Center. But Eclipse is not opening, when I click it is not opening or showing any error message it is very silent. Output for java -version: java version "1.7.0_55" Java(TM) SE Runtime Environment (build 1.7.0_55-b13) Java HotSpot(TM) Server VM (build 24.55-b03, mixed mode) uname -a: Linux Lenovo-IdeaPad-Z510 3.13.0-24-generic #46-Ubuntu SMP Thu Apr 10 19:08:14 UTC 2014 i686 i686 i686 GNU/Linux When I give Eclipse in terminal I am getting The program 'eclipse' is currently not installed. You can install it by typing: sudo apt-get install eclipse-platform And when I give sudo apt-get install eclipse-platform Reading package lists... Done Building dependency tree Reading state information... Done eclipse-platform is already the newest version. 0 upgraded, 0 newly installed, 0 to remove and 3 not upgraded.

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• Samba installation failed on ubuntu 12.10

  - by Ayyaz

  I was trying to install samba to access shared printer on windows pc connected via office network, following response came out from terminal. please guide me how to install Samba or any other alternative. crm@crm-HP-G62-Notebook-PC:~$ sudo apt-get install samba [sudo] password for crm: Reading package lists... Done Building dependency tree Reading state information... Done Some packages could not be installed. This may mean that you have requested an impossible situation or if you are using the unstable distribution that some required packages have not yet been created or been moved out of Incoming. The following information may help to resolve the situation: The following packages have unmet dependencies: samba : Depends: samba-common (= 2:3.6.6-3ubuntu4) but 2:3.6.6-3ubuntu5 is to be installed Depends: libwbclient0 (= 2:3.6.6-3ubuntu4) but 2:3.6.6-3ubuntu5 is to be installed Recommends: tdb-tools but it is not going to be installed E: Unable to correct problems, you have held broken packages. crm@crm-HP-G62-Notebook-PC:~$

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• How to convert a Bazaar repository to GIT repository?

  - by Naruto Uzumaki

  We have a large bazaar repository and we want to convert it to a git repository. The bazaar repository contains the folders of each of the interns. Any documentation/code prepared by interns is committed in their directory so there are a huge number of commits. What steps should be performed to securely convert the bazaar repository to a git repository so that we do not lose any commit information. We firstly need to create a backup of the existing bazaar repository and then convert it. Edit: I followed this link: http://librelist.com/browser//cville/2010/2/9/migrate-repository-bzr-to-git/ It's working fine on my system with Ubuntu. But when I try to run it on the actual server it gives me EOF error and crashes Starting export of 1036 revisions ... fatal: EOF in data (1825 bytes remaining) fast-import: dumping crash report to .git/fast_import_crash_11804 Edit 2: I also tried it on a new CentOS system and received the following error fatal: ambiguous argument 'HEAD': unknown revision or path not in the working tree. Use '--' to separate paths from revisions

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• Design patterns for effects between actors and technology

  - by changelog

  I'm working on my first game, and taking the opportunity to brush up my C++ (I want to make as much of it as portable as I can.) Whilst working on the technology tree and how it affects actors (spaceships, planets, crew, buildings, etc) I can't find a pattern that decouples these entities enough to feel like a clean approach. Just as an idea, here's the type of effects these actors can have on one another (and techs too) An engineer inside a spaceship boosts its shield A hero in a spaceship in a fleet increases morale A technology improves spaceships' travel distance A building in a planet improves its production The best I can come up with is the Observer pattern, and basically manage it more or less manually (when a crew member enters a spaceship, fire the event; when a new building is built in a planet, fire the event, etc etc.) but it seems to be too tightly coupled to me. I would love to get some ideas about how to approach this better.

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• Any board-like platform but only for files instead of text posts? [on hold]

  - by Janwillhaus

  I am looking for a (best open-source or free but also commercially available) CMS platform that is built similarly to bulletin boards (for example phpBB) but instead of text posts, registered users can upload files that can be rated, commented etc.) I am aware of the number of board CMSes that have file-database plugins, but that is not what I want. I want to have a system that focuses on the files rather than on the postings. Or do you have any alternative ideas on solutions to the problem? I need the following functions CMS focused on file management Files that can be categorized (in a tree-like view for example) Comments and ratings can be added to files Users that can be provided various rights around the platform (moderation, commenting, exclusion of non-registered users, etc.) Users can upload files themselves (for further moderation

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• How to install mysql?

  - by batman

  I tried mysql in my command line : I get : The program 'mysql' is currently not installed. You can install it by typing: sudo apt-get install mysql-client-core-5.5 But when I do: sudo apt-get install mysql-client-core-5.5 But I get: Reading package lists... Done Building dependency tree Reading state information... Done mysql-client-core-5.5 is already the newest version. 0 upgraded, 0 newly installed, 0 to remove and 47 not upgraded. I'm very much confused! Thanks in advance.

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• Family History Website

  - by Joshua Slocum

  I want to develop a website that has family history information. Something like Ancestry.com but much simpler. I want to display photos, family tree, have logins and allow members to upload family photos,documents,stories and comments and have tags for the docs and photos and maybe a message board and blog. Also, this is not for the general public but just my extended family. I'd like each person to have their own page with a bio, pics and information. Is there anything that already does something like this? I don't want to waste time writing this if it already exists. thank you I'm familiar with asp.net and php.

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• What is an Enterprise Resource Planning (ERP) System?

  In order to understand what an Enterprise Resource Planning System is let us look at a classic American kids snack, the Rice Krispy Treat if we conceptually view the treat as a company’s internal applications as a whole.  Furthermore we can view a company’s departmentalized software applications as the theoretical Rice Krispies in the treat. In addition, the Rice Krispies consist of a combination of ingredients that be broken down into data, user interfaces and business logic. Next, we have the margarine or butter that is used to help the marshmallows bind with the Rice Krispies; this role in our conceptual view is taken by a data source typically as a relational database management system. Finally we have the melted marshmallows which act as the ERP software that connects all of the individual departmental software applications in to one unified system that allows all user one unified system to interact with all of the individual dispersed systems. An example of this would be if a customer places an order with a telephone operator and once the orders is processed an employee in the shipping department can see the order ready for fulfillment on his order screen. The ERP acts a go between for various independent departmental systems so that they can integrate with one another.

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