Posts Tagged With: Ruby

Double space a file using Ruby

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Double space a file with Ruby using the command


ruby -pe 'puts' < file.txt
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Installing Rails

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You can install Rails in a Fedora system with these commands…


yum -y install ruby ruby-devel ruby-irb ruby-libs ruby-rdoc ruby-ri rubygems
sudo gem update
sudo gem install rails --include-dependencies
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Run a Command if Another Command Succeeds

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This will let you run a linux command based on the success of anther command. Note: This will only work in bash shell.


ruby Create_PDF.rb && if [ $? == 0 ]; then kpdf report.pdf; fi 
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Find if a Variable is Defined in Ruby

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This will let you find whether a variable is defined in ruby.


if(defined? var_name) then
    print var_name + " is set"
end
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Installing a Ruby Gem

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Use this command to install a ruby gem in Linux – you must be connected to the net


sudo gem install ruport -y
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