[sed] Delete 3 line after the match word

[sed] Delete 3 line after the match word



sed -e '/DEBUG/,+3d' \

-e '/PARSER/d' \

-e '/Snmp_Set/d' \

 happy.txt >  happy-1.txt



Reference :

• 
  How can I use “sed” to delete 2 lines after match/matches?