sed delete next line after match code example
Example 1: sed delete line before match
Use d option at the end of sed command string for deleting line of matches.
tac | sed -i "" "s/matching_pattern/I+1 d" file.txt | tac #
Example 2: sed delete line with match
Use d option at the end of sed command string for deleting line of matches.
sed -i "" "s/matching_pattern/d" file.txt