ashrithr

Why I love zsh

• Smarter completion. A few examples:
• context sensitive -- if you have file "name1" and directory "name2", "cd nam<TAB>" completes to "name2/"
• "tar xf <TAB>" completes to tarballs only. "unrar x <TAB>" completes to RARs only. etc.
• rsync / scp completion: "rsync host:anything/<TAB>" shows you files on host under anything/
• also works with rsync:// URLs
• SSH host completion from ~/.ssh/config & ~/.ssh/known_hosts
• lots of other smart completions: Rake tasks, git commands & SHAs, dpkg packages, dash-options for most commands, etc etc.

ashrithr

begin
  require 'tweetstream'
  require 'poseidon'
rescue 'LoadError'
  raise "Requires tweetstream and poseidon libraries"
end  

raise "Works only on 1.9" if RUBY_VERSION < "1.9"
raise "Requires Argument keyword to match from twitter firehose" if ARGV.length == 0
 

ashrithr

Sample TCP server-client implementation using openssl in ruby

Use the wrapper shell script to create ssl certificates ./openssl.sh -newca, enter the details and the required files will be generated to ./demoCA dir from where you run the script. cacert.pem will be your ssl-certificate and private/cakey.pem will be your ssl-key

Start SSL Server using:

ruby ssl_server.rb 9099 demoCA/cacert.pem demoCA/private/cakey.pem

ashrithr

#!/usr/bin/env bash

# ---
# => Nagios plugin to monitor hadoop dfs
#    This script serves as base line for nagios plugins for hadoop
# Author: Ashrith
# ---

PROGNAME=`basename $0`
VERSION="Version 1.0"

ashrithr

#!/usr/bin/env bash

#Author: Ashrith

#Arrays to store hosts and their regionsOnLine respectively
declare -a HOSTS_ARRAY
declare -a REGIONS_ARRAY
message="" 
EXIT_STATUS=0

ashrithr

require 'openssl'

#
# Program to demonstrate Certificate Signing Request using openssl
#

# Create a new key
def gen_key(name)
  key = OpenSSL::PKey::RSA.new 1024
  file = File.new name, "w"

ashrithr

#!/bin/bash
#
# Licensed to the Apache Software Foundation (ASF) under one or more
# contributor license agreements.  See the NOTICE file distributed with
# this work for additional information regarding copyright ownership.
# The ASF licenses this file to You under the Apache License, Version 2.0
# (the "License"); you may not use this file except in compliance with
# the License.  You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0

ashrithr

import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.StatusLine;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.DefaultHttpClient;
import org.json.simple.JSONArray;
import org.json.simple.JSONObject;
import org.json.simple.JSONValue;

ashrithr

Start server on one machine using:

iperf -s -i 1

• -i specifies the interval at which the output is specified
• -s specified to start server

Start client on another machine using:

ashrithr

class String
  def undent
    gsub(/^.{#{slice(/^ +/).length}}/, '')
  end
end

#Usage:
test = <<-EOS.undent
  testing unindent
..another line