How to extract patterns form a text files in shell bash

Question

I have a text file that contains:

toto.titi.any=val1
toto.tata.any=val2
toto.tete.any=val2

How to extract titi , tata

Answer 1

awk/cut would be better choice for this problem.

here is the sed line and grep option:

sed -r 's/.*\.([^.]*)\..*/\1/'
grep -Po '\.\K[^.]*(?=\.)'