Appending text in a file

[Gerald Combs]

On Fri, 25 Apr 2003, Jonathan Hutchins wrote:

> I have an LDIF file with a bit over 300 entries.  I need to append some text 
> (",ou=contacts,dc=tarcanfel,dc=net")  to each line that begins with "dn:". 
>  
> Surely there's an easy way to script this. 
>  
> Using sed, I can append text, but only as the next line. 

    awk '/^dn:/ {printf "%s,ou=contacts,dc=tarcanfel,dc=netn", $0}       ! /^dn:/ {print}' < [data 
file]

The first expression ("/^dn:/") appends the text.  The second expression
("! /^dn:/") prints the line unchanged for anything that doesn't match
the first expression.