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Ranjith - Can you please explain your command below...

Let's assume I found the line with "a sss" using grep... all I now need to do is start deleting lines till I find the next keyword "a ..."...

Input

a bbb
c ddd
e fff
g hhh

a sss
c ggg
e xxx
f sss

a ddd
d sss
r sss
g hhh

Output

a bbb

Hi

I have a set of options in the form of key value in a file. Need to find a particular value of 'a' and delete all lines till the next 'a' keyword .

Ex :

a bbb
c ddd
e fff
g hhh
...