steps to add project to git repo locally

Note: In the below step , I have used a project named "my_project"  . Install git and create a account in github before follow the below steps.

Github Link : https://github.com/

In Ubuntu flavoured system :

sudo apt-get install git

My project directory is :

/home/cision/project/my_project>

1.  cd /home/cision/project/my_project>
2. git config --global user.name 'username'
3. git config --global user.email 'your registered emails id in github'
4. git init
5. git add -A
6. git status 
7. git commit -m "initialize repository'

safeguard : In case any damage in local project directory ( not the git repository ) use th ebelow command to restore from git to project directory 

Ex: remove any file from project directory , then 

# git checkout -f

Now you can see the same deleted file again in the project directory.

Arangodb3 basic shell tutorials:

Hope arangodb is already installed !

1) check if the arangodb is already installed ?

curl http://localhost:8529/_api/version   => here it will give the details of the arangodb version in json format.

2) login to arangodb shell

arangosh    =>  provide the arangodb root password

3) create a user

require ("org/arangodb/users").save("khirod","khirod");

4) Grant _system access to user khirod

require("org/arangodb/users").grantDatabase("khirod","_system");


next  coming soon ....

Some Ruby tips :

1) use literal array instead of ['test', 'test1']

ex :  %w(test test1)

2) check with multiple values

ex: %w(val1 val2 val3).include?(check_val)

How to Start Juniper VPN through firefox in 64 bit Ubuntu OS

Unless you need 64bit firefox , try the below steps

sudo apt-get purge openjdk-\* icedtea-\* icedtea6-\*
sudo apt-get install firefox:i386 openjdk-6-jdk:i386 icedtea-6-plugin:i386

sudo apt-get install xterm

OR

1) download and install 32bit java
2) Then install 32bit java through update-alternatives .

Ex:
sudo update-alternatives --install /usr/bin/java java /home/user/programs/java/jdk1.7.0_75/bin/java 10

3) restart firefox
 

else

follow the below link

https://www.java.com/en/download/help/enable_browser_ubuntu.xml

secured wifi disconnect in mint

Please create the below file with below content and reboot the system to overcome from regular disconnection of secured wifi connection.  I have tried in mint 17.3 and it works. Please let me know if it fail with proper log.


echo "options rtl8723be fwlps=N ips=N" | sudo tee /etc/modprobe.d/rtl8723be.conf

Rest service to get the name node Host ID from thousand of node from cloudera hadoop cluster


1) get the cluster name

clustername = HttpClient(http://:7180/api/v10/clusters)

2) now get the  HostID

host_id=HttpClient(http://:7180/api/v10/clusters/${clustername}/services/hdfs/roles)

3) Now get the Hostname which is on with Namenode

host_name=HttpClient(http://:7180/api/v10/hosts/fb50e775-33b7-4f38-b268-2bb3220695e1)

Now you have the host name which is on with name node .

NOTE : Here I just used HttpClient as a sample method which will get the details from rest service and parse as per the requirements.




-Khirod

Hello Juby with warbler

Lets have a Hello world program through jruby and prepare a executable jar through warbler.

Let's assume jruby already installed . In my case I used jruby 1.7.8

Please create the below directory structure :

HelloWorld---|
                       |--bin--main.rb
                       |--lib--hello--hello.rb
                       |--Gemfile                      -------File
                       |--helloworld.gemspec   -------File

copy the below content to the respective file, then execute the below steps through terminal. at the end you should have a HelloWorld.jar in your project directory and follow the step number (5) to get the output.

1. install bundler gem : gem install bundler
2. change to the directory HelloWorld 
3. execute bundle : $> bundle
4. warble compiled jar
5. java -jar HelloWorld.jar

helloworld.gemspec :

Gem::Specification.new do |s|  s.name             = 'helloworld'  s.version          = '1.0.0'  s.authors          = ['Khirod Patra']
  s.date             = '2013-07-03'  s.description      = 'Hello World'  s.email            = ['khirodpatra@gmail.com']
  s.homepage         ='khirodblog.blogspot.com/'

  s.require_paths    = ['lib','bin']
  s.files            = Dir.glob("{bin,lib}/**/*")
  s.executables   = s.files.select { |f| f =~ /^bin\// }.map{ |f| File.basename(f) }
  s.default_executable = 'bin/main.rb'  end

GemFile :

source 'https://rubygems.org'

gem 'warbler'

hello.rb :

module Hello
  class SayHello
    def hello
      puts "hello World"    end  endend

main.rb :

#!/usr/bin/env ruby
require 'rubygems'

require 'java'
my_lib = File.expand_path(File.dirname(__FILE__) + "/../lib")$LOAD_PATH.unshift(my_lib) unless $LOAD_PATH.include?(my_lib)
require 'hello/hello'
module Hello
  class Main    SayHello.new.hello
  endend