Display variables in CAT area

Shell Programming and Scripting
1

Hi All,

I've got a script to output YAML data, and I want to display data that's held inside variables inside one large CAT area. What's the easiest way to do this?

cat << "END"
---
classes:
        - general_image
        - $intro      #Variable 1
        - $mid       #Variable 2
        - $doubled  #Variable 3
parameters:
        puppet_server: testing.huronhs.com
END
exit 0

I've tried referencing the variables this way, and tried using the backtick ` or brackets, but nothing exports the data held in the variables (just the string of "$intro" itself).

2

loose the quotes around END:

     << [-]word
           The shell input is read up to a line that is the  same
           as word, or to an EOF. No parameter substitution, com-
           mand substitution, or file  name  generation  is  per-
           formed  on  word.  The  resulting  document,  called a
           here-document, becomes  the  standard  input.  If  any
           character  of  word  is  quoted,  no interpretation is
           placed upon the characters of the document. Otherwise,
           parameter  and command substitution occur, \NEWLINE is
           ignored, and \ must be used to quote the characters \,
           $,  `,  and  the  first  character  of  word.  If - is
           appended to <<, then all  leading  tabs  are  stripped
           from word and from the document.
3

D'OH!

Why do I always do this to myself...

Thanks for the polite RTFM! Cheers!