Stress-Strain Plot for Crack Example

Hello all,
Thanks a lot for all your response for my previous query for installation of Lammps. Now i got my Lammps in Ubuntu OS. So I tried to use the example of crack which is given in the package. I got it’s visual simulation in Ovito. Now i want to extract some more info like stress-strain variation. Can someone please help me in this respect?
Thanks in advance.

How about the LAMMPS manual? It describes

various kinds of output you can get from a simulation.
E.g. see the thermo_style command.