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  • Rails 3.1.0

    Posted on {31-Aug-2011} Frank Vielma No comments

    Recently, the rails 3.1.0 is now a release version.

    It is recommendable to use rvm (you need to install rvm) creating a new gemset so, we can isolate the install from the rest of our environments. We need the follow steps:

    • Creating a gemset:
      rvm --create 1.9.2-p180@rails31
    • Installing the last rails version (3.1.0) :
    • gem install rails
    • To generate a new project:
    • rails new project31
    • Adding the following lines to the Gemfile file
    • gem 'execjs'
      gem 'therubyracer'

      ExecJS. Run JavaScript code from Ruby.
      therubyracer. Embed the V8 Javascript Interpreter into Ruby.

    • Running bundle:
    • bundle install
    • Starting the new rails application:
    • rails s

    After it, we would see the following lines:

    => Booting WEBrick
    => Rails 3.1.0 application starting in development on http://0.0.0.0:3000
    => Call with -d to detach
    => Ctrl-C to shutdown server
    [2011-08-31 09:39:29] INFO  WEBrick 1.3.1
    [2011-08-31 09:39:29] INFO  ruby 1.9.2 (2011-02-18) [i686-linux]
    [2011-08-31 09:39:29] INFO  WEBrick::HTTPServer#start: pid=11130 port=3000

    Release notes
    Rails 3.1 sources

  • Installing MongoDB and php driver in Ubuntu 10.10

    Posted on {10-May-2011} Frank Vielma No comments

    MongoDB is a NoSQL (“not only sql”), a non-relational, distributed, open-source, horizontal scalable and document-oriented database written in the C++. It doesn’t have transactions, ACID compliance, joins, foreign keys, or many of the other features belonging to relational database management system (RDBMS). The database is document-oriented so it manages collections of JSON-like documents.

    One of the most important feature is than MongoDB scaling very well.

    Installation.

    • Step 1. Adding the ubuntu repository:
      sudo apt-key adv --keyserver keyserver.ubuntu.com --recv 7F0CEB10

      add at the end of the /etc/apt/sources.list file:

      deb http://downloads-distro.mongodb.org/repo/ubuntu-upstart dist 10gen
    • Step 2. Installing mongodb
       sudo aptitude update && sudo aptitude install mongodb-10gen
    • Step 3. Verifying installation:
      mongo --version
      MongoDB shell version: 1.8.1
    • Step 3. Now, we will installing the PHP driver:
      sudo aptitude install php5-dev php5-cli php-pear && sudo pecl install mongo

      add the dynamic library mongo.so at the end of the php.ini (/etc/php5/apache2/php.ini) file:

      extension=mongo.so
    • Step 4. Restart apache and verify if all is ok running the phpinfo() function:
      sudo /etc/init.d/apache2 restart

    mongodb

    More info

  • How to convert DBF to CSV (ubuntu, debian)

    Posted on {03-May-2011} Frank Vielma No comments

    There is a perl tool (dbf_dump) that allows to convert dbf files (dBase) to csv (comma-separated values). To install it, we must to install libdbd-xbase-perl:

    sudo aptitude install libdbd-xbase-perl

    Example:

    dbf_dump --fs=","  file.dbf > file.csv
  • Installing RVM on Ubuntu maverick

    Posted on {29-Apr-2011} Frank Vielma No comments

    In first place, what is RVM ?
    RVM is the Ruby Version Manager. It makes installing and managing several different versions and implementations of Ruby on one computer.

    Installation.
    There are two ways to install and configure RVM.

    • As a standard user
    • As root

    In this post we will do the first one.

    In first time, you will need to install zlib and others.

    Debian/Ubuntu systems:

    sudo apt-get install zlib1g-dev zlib1g libssl-dev libreadline5-dev libxml2-dev libsqlite3-dev
    • Step 1. Download and install rvm from sources. It will install in $HOME/.rvm. (You must have installed curl and git)
      bash < <(curl -s https://rvm.beginrescueend.com/install/rvm)
    • Step 2. Now, we will complete the install by loading RVM in new shells adding the following line in a $HOME/.bashrc file.
      [[ -s "$HOME/.rvm/scripts/rvm" ]] && source "$HOME/.rvm/scripts/rvm"
    • Step 3.Open a new shell or run:
      source $HOME/.bashrc
    • Step 4.Test if the RVM’s installation is working.
      type rvm | head -1

      and you should get:

      rvm is a function

    Now, assuming that all is working, we could install ruby 1.9.2 as following:

    rvm install 1.9.2

    We can use ruby 1.9.2 in our system running only:

    rvm use 1.9.2

    so, we can verify what ruby’s version is running right now:

    which ruby

    you get:

    $HOME/.rvm/rubies/ruby-1.9.2-p180/bin/ruby

    But, if we want to return to the initial conditions ? No problem, you need only to run:

    rvm system

    it will return to the ruby’s system (ruby 1.8.7 (2010-06-23 patchlevel 299) [i686-linux])

  • Installing Firefox 4 on Debian 6 (Squeeze), Ubuntu 10.04 and 10.10

    Posted on {24-Mar-2011} Frank Vielma No comments

    Firefox 4 is a very important release from Mozilla guys. This version include improvements in performance, standards support, and the user interface.

    Firefox 4

    The simple way to install Firefox 4 on Ubuntu is:

    sudo add-apt-repository ppa:mozillateam/firefox-stable
    sudo aptitude update && sudo apt-get upgrade

    On Debian:

    wget http://releases.mozilla.org/pub/mozilla.org/firefox/releases/4.0/linux-i686/en-US/firefox-4.0.tar.bz2
    sudo tar -xvjf firefox-4.0.tar.bz2 -C /usr/local
    sudo ln -s /usr/local/firefox/firefox /usr/local/bin/firefox4

    The steps to add firefox4 to the gnome panel are: Right button over panel -> Add to Panel… -> Custom Application Luncher -> Add -> Fill fields -> Choose an Icon (path to firefox4’s icons /usr/local/firefox/icons/).

    add_panel_debian_firefox4

  • Installing Geonode in a debian lenny platform

    Posted on {17-Mar-2011} Frank Vielma No comments

    GeoNode is an open source platform that facilitates the creation, sharing, and collaborative use of geospatial data.

    • Step 1. In first time, you need to install and purge some packages:
       sudo aptitude install git-arch subversion libgeos-dev gdal-bin g++ make ant zlib-bin zlib1g-dev libreadline5-dev tcl8.5-dev tk8.5-dev libssl-dev libsqlite3-dev libbz2-dev libgdbm-dev
       
       sudo aptitude purge gij-4.3 bsh bsh-gcj java-gcj-compat java-gcj-compat-headless libbcel-java libhsqldb-java libhsqldb-java-gcj libjaxp1.3-java libjaxp1.3-java-gcj libjline-java liblog4j1.2-java libmx4j-java libregexp-java libservlet2.4-java libxalan2-java libxalan2-java-gcj libxerces2-java libxerces2-java-gcj openoffice.org openoffice.org-base openoffice.org-evolution openoffice.org-filter-mobiledev openoffice.org-gcj openoffice.org-java-common openoffice.org-officebean openoffice.org-report-builder-bin openoffice.org-writer2latex
    • Step 2. Install sun-java. You need modfy /etc/apt/sources.list and add non-free to the Debian Lenny repositories:
      deb http://volatile.debian.org/debian-volatile lenny/volatile main
      deb-src http://volatile.debian.org/debian-volatile lenny/volatile main
       
      deb http://mirrors.kernel.org/debian/ lenny main non-free
      deb http://security.debian.org/ lenny/updates main non-free

      and run:

      sudo aptitude update
      sudo aptitude install sun-java6-jdk
    • Step 3. Download, compile and install python 2.6.
      wget http://python.org/ftp/python/2.6.6/Python-2.6.6.tar.bz2
      tar -xvjf Python-2.6.6.tar.bz2
      cd Python-2.6.6
      ./configure --with-threads --enable-shared
      make -j 2
      sudo make install
      sudo ln -s /usr/include/libpython2.6.so.1.0 /usr/lib/
      sudo ln -s /usr/include/libpython2.6.so /usr

      To run python -V and you would get:
      Python 2.6.6

    • Step 4. Download, compile and install maven
      wget http://www.carfab.com/apachesoftware//maven/binaries/apache-maven-2.2.1-bin.tar.gz
      sudo tar -xvzf apache-maven-2.2.1-bin.tar.gz -C /usr/local/

      Add at the end of ~/.bashrc file

      export PATH=$PATH:/usr/local/apache-maven-2.2.1/bin/
      export JAVA_HOME=/usr

      and run:

      source ~/.bashrc

      so, you would to get when run mvn -v:

      Apache Maven 2.2.1 (r801777; 2009-08-06 14:46:01-0430)
      Java version: 1.6.0_22
      Java home: /usr/lib/jvm/java-6-sun-1.6.0.22/jre
      Default locale: en_US, platform encoding: UTF-8
      OS name: "linux" version: "2.6.26-2-686" arch: "i386" Family: "unix"
    • Step 5. Installing geonode. The first thing is clone the repository:
      git clone git://github.com/GeoNode/geonode.git geonode

      then,

      cd geonode
      git submodule update --init
      python bootstrap.py --no-site-packages
      source bin/activate
      paver build
      django-admin.py createsuperuser --settings=geonode.settings
      paver host

    Development GeoNode should be running at http://localhost:8000/

  • Installing a VM (Virtual machine) with VirtualBox

    Posted on {16-Mar-2011} Frank Vielma No comments

    VirtualBox is a cross-platform virtualization application. In this post, we will use it in a Ubuntu (maverick) platform (host OS) and we will install Debian as a guest virtual OS in a following post. At first, you must to download it from:

    http://www.virtualbox.org/wiki/Linux_Downloads

    • Step 1. As an user with the necessary privileges to install packages (root or sudo user), run:
      sudo dpkg -i virtualbox-4.0_4.0.4-70112~Ubuntu~maverick_i386.deb

      VirtualBox will be installed in the Applications -> System Tools -> Oracle VM VirtualBox.

    • Step 2. Now, you need to run the Oracle VM VirtualBox and to create a new virtual machine (VM) doing click in the New button or Ctrl-N
      VirtualBox's buttons
    • Step 3. Click in the Next button:
      Wizard window
    • Step 4. To choice a VM name and OS type. We choice: Name: debian_test, Operating System: Linux, Version: Debian.
      VM Name and OS Type
    • Step 5. To select the amount of RAM. We choice 400 MB.
      Memory
    • Step 6. Virtual Hard Disk. Here we will use a new virtual hard disk with the recommended size, 8GB.
      Virtual Hard Disk
    • Step 7. After it, VirtualBox show you a Wizard to create a new disk virtual. Click Next and select the Hard Disk Store Type. By default the storage type is a dynamically expanding storage.
      Create New Virtual DiskStorage Type
    • Step 8. The following step is to select the location where we want to save our virtual disk and select the size of it.
      virtual disk location and size
    • Step 9. At the end, the wizard show you the summary. Now, we can see in the VirtualBox Manager out VM.
      summary > VirtualBox Manager
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