Hi,
welcome to LQ!
The quick & easy way:
Code:
awk 'BEGIN{RS=ORS="\n\n";FS=OFS="\n"}NF>=4' file
[edit]
What this does is quite simple; awk normally operates with
lines (\n) as records, and any number of whitespace as a
field separator. What we did here is to tell it that a field
is anything with a line-end (FS), and that a record is a sequence
of 2 line-endings (RS, with nothing else in between, AKA, our
empty line between paragraphs). The rest is even simpler:
if we have NF (number of fields, AKA lines with content) greater
or equal 4, perform the default action (which is print and
which we have lazily omitted). The significance of RS=ORS
and FS=OFS respectively is that we don't want the output to
be reformatted to "standard" awk separators.
[/edit]
Cheers,
Tink
