bash script regular expression

[John Mellor]

On Thu, 2012-02-09 at 23:31 -0800, Alejandro Rodriguez Luna wrote:
> . . .
> #/bin/bash
> for i in $(cat certificates.txt)
> do  
>     echo $i 
> done

The problem is caused by the expected behaviour of the $(cat) construct
being fed into a for loop.  It will use the current word separator to
split the text file into separate single-word lines for each word, which
is what lots of people want, but not what you expect in your situation.

Instead, use the read command like:
	
	while read i
	do  
		echo $i 
	done <certificates.txt
or:
	cat certificates.txt | while read i
	do
		echo $i
	done

and I think you will then see what you expect.