Rodrigo Morales rodrigomf24

## jenikns_ci_on_ubuntu.md

      
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                rodrigomf24
                / jenikns_ci_on_ubuntu.md
            
            
              Created
              February 16, 2017 01:25
                — forked from ostinelli/jenkins_ci_on_ubuntu.md
            
              
                Setup Jenkins CI on Ubuntu.
              
          
    Jenkins CI

Instructions on how to setup a secured Jenkins CI.
Install Jenkins

$ wget -q -O - https://jenkins-ci.org/debian/jenkins-ci.org.key | sudo apt-key add -
$ sudo sh -c 'echo deb http://pkg.jenkins-ci.org/debian binary/ > /etc/apt/sources.list$ .d/jenkins.list'
$ sudo apt-get update
$ sudo apt-get install jenkins


## nil_empty_blank_present_ffdierence_in_ruby
# nil? can be used on any Ruby object. It returns true only if the object is nil.
nil.nil?   # => true
[].nil?    # => false
{}.nil?    # => false
"".nil?    # => false
" ".nil?   # => false
true.nil?  # => false

# empty? can be used on some Ruby objects including Arrays, Hashes and Strings. It returns true only if the object's length is zero.
nil.empty?   # NoMethodError: undefined method `empty?' for nil:NilClass
	# nil? can be used on any Ruby object. It returns true only if the object is nil.
	nil.nil? # => true
	[].nil? # => false
	{}.nil? # => false
	"".nil? # => false
	" ".nil? # => false
	true.nil? # => false

	# empty? can be used on some Ruby objects including Arrays, Hashes and Strings. It returns true only if the object's length is zero.
	nil.empty? # NoMethodError: undefined method `empty?' for nil:NilClass