removing multple line base on regex search

Question

how can I remove number of line based on regex search? for example : if i have a file :

aaa
bbb
ccc
ddd
bbb
eee

I would like to remove the line that contains "bbb" string and the line after it . so the result should look like :

aaa
ddd

Answer 1

addr1,+N Will match addr1 and the N lines following addr1.

$ sed '/bbb/,+1d' file.txt 
aaa
ddd