find lines between two patterns using sed

Question

I have the lines in text.txt as below:

blah blah..
blah abc blah..
blah abc blah
blah blah..
blah blah..
blah blah..
blah efg blah blah
blah blah..
blah abc          


        

Answer 1

This might work for you (GNU sed):

sed -n '/\<abc\>/,/\<efg\>/{/\<abc\>/{h;d};H;/\<efg\>/{x;p}}' file