sed + delete line that begin with ### include space between line beginning and ###

Question

hi all hi have: sed -i '/^###/d' file

How to change the sed syntax in order to react like awk syntax?

awk '!/^[ \t]*###/' file

for example sed need to delete line that begin with space or TAB and then ###

THX Yael

Answer 1

sed -i '/^[ \t]*###/d' file