Shell Programming and Scripting

awk -vs1="Server" 'BEGIN{ print s1 "Stopped" } /^[0-9]/ {print} END{print s2 "Started"}' starting_ending_text

Server Stopped
123
456
789
Server Started

$ tail -$(grep -m1 -n 'Server Stopped' <(tac file) | cut -d':' -f1) file
Server Stopped
123
456
789
Server Started

>>> import re
>>> text = '''
... Server Stopped
... ABC
... DEF
... GHI
... JKL
... Server Started
... MNO
... PQR
... STU
... Server Stopped
... VWX
... YZ
... ABC
... Server Started
... Server Stopped
... 123
... 456
... 789
... Server Started
... '''
>>> pattern = '(^Server Stopped\s*\n^(?:\d+\n)+^Server Started)'
>>> for found in re.search(pattern,text,re.M).groups():                                
...    print found
... 
Server Stopped
123
456
789
Server Started