Upload file on AWS S3 using Ruby SDK v2

s3_file_upload_ruby_sdk_v2.rb

#!/usr/local/rvm/rubies/ruby-2.1.5/bin/ruby
# This needs to be run as ./script_name source/file/path
# I recommend using relative paths than absolute paths

require 'aws-sdk'  # gem install aws-sdk

# Change these variables as per your environment
bucket_name = 'vikas-bucket'
sub_bucket_name = 'vikas/reachvikas.com'
myregion = 'us-west-1'
access_key = 'YOUR_ACCESS_KEY'
secret_access_key = 'YOUR_SECRET_ACCESS_KEY'

file_name = ARGV[0]
file_name_key = [ sub_bucket_name, file_name].join("/")

s3 = Aws::S3::Resource.new(
        credentials: Aws::Credentials.new(access_key, secret_access_key),
        region: myregion
)

puts "Uploading #{file_name} of #{File.size(file_name)} byte(s) to #{bucket_name}/#{sub_bucket_name}  ...\n"
obj = s3.bucket(bucket_name).object(file_name_key)
obj.upload_file(file_name)