command for dislocation and amorphous structure

Dear users,
Do anybody of you have command to create dislocation in a crystal and also that to make a amorphous system?
Thanks & Regards

building a complex crystal with defects is somehting
you need to do as a pre-processing step to create a date file.
You can get an amorphous system by heating a crystal.


Thank you Steve for your suggestion. I want to create a system of amorphous Si .If possible, would you please provide those commands for heating and quenching?
Thanks & Regards

You heat and quench with a thermostat.
LAMMPS has several. See section 6.16
of the manual.