[ILUG] Re: sed question

[Marcus Furlong]

Brendan Kehoe <brendan <at> zen.org> writes:

> > Does anyone know a one-liner sed/awk/perl to add a blank line to
> > the start of a file? It seems to work fine if I add a blank line.
> 
> maybe for awk try either
> 
>     awk '{if(NR==1) print ""; print;}'
>     awk 'BEGIN{print ""} {print;}'
> 
> or perl
> 
>     perl -e 'print "\n"; while (<>) { print $_; }'
>     perl -e 'print "\n"; print while <>;'

Thanks for those, I worked out the following one which works as well:

perl -e 'print "\n" if $. == 1'

Marcus.