I have a file which contains following content,
Hello world Unix!! Its bright world Current time is HH:mm:ss Next action plan is item #3 End of task. Thank you. Hello world Linux!! All actions completed. End of Activity. Thanks.
I would like to selectively delete all the lines that contain keyword, "world" and also all the subsequent lines until a line with specific set of keywords (Example, "Activity" or "task") are encountered.
Desired output :
End of task. Thank you. End of Activity. Thanks.