sed/awk - How to remove lines with less than 3 columns

Question

Really simple question. I simply need to remove lines from a list when there are less than 3 columns

Eg:

a b c
a b      <--- This one needs to disappear
a b c

I'm pretty sure awk NF does it, however I can't seem to get it right.

Thanks in advance!

Answer 1

sed, grep, awk all can do this job. since you prefer awk, see if this helps?

awk 'NF>=3' file