[SWLUG] Awk is driving me MAD!

[Justin Mitchell]

On Wed, 2003-06-11 at 09:08, Gareth James Powell wrote:
> dick at acm.org wrote:
> > or: awk '{printf("%s IN A %s\n", $2, $1);}' /etc/hosts


> ...as hosts on the works box I use has comment lines

You dont need to use a sed, awk can execute commands only for lines that
match certain patterns, so to extend dicks version

awk '!/^#/{printf("%s IN A %s\n, $2, $1);} /etc/hosts

Which makes it run the code only for lines that do not start with a #