Replace one substring for another string in shell script

Question

I have \"I love Suzi and Marry\" and I want to change \"Suzi\" to \"Sara\".

#!/bin/bash
firstString=\"I love Suzi and Marry\"
secondString=\"Sara\"
# do some         


        

Answer 1

If tomorrow you decide you don't love Marry either she can be replaced as well:

today=$( /tmp/lovers.txt

There must be 50 ways to leave your lover.