From: Ch Asif <muasif80@...>
Date: 2008-10-03T19:40:43+09:00
Subject: Using Shell linux commands in Ruby!

I have the following text that allows for having shell linux commands
executed and their results manipulated inside ruby code. If anyone can
tell me a better way of doing this, or he/she can mention the pros and
cons of this way of using shell linux commands inside ruby. I will be
very thankful to him/her. The following text is also available on the
link
http://linux-certification.blogspot.com/2008/10/using-shell-commands-in-ruby.html

The following is a step by step guide how can you write shell linux
commands inside ruby code and get their results in customized output
created by ruby.


First of all execute the following command on shell prompt

shell> vi userinfo.rb

This will open up vi editor with a file named userinfo opened in it

1. Press i on your keyboard, this will switch the file userinfo into
insert mode
2. Write the following code in it



#Code Starts
def user
user = `users`
end

def groups
groups = `groups`
end

puts "You are #{user} and you belongs to the groups \n #{groups}"
#Code Ends

3. Press ESC key on your keyboard to exit insert mode
4. Now write :wq and press enter key on your keyboard

This will throw you out to the shell prompt. On the shell prompt write
the following command

shell> ruby userinfo.rb

You will the customized output like this

You are root and you belong to the groups
  [A list of group will be displayed on this line]

Thats it to executing shell linux commands inside your linux code
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