nd line option.

(2) or specifying the number of copies of PWscf inputs with the <b>./neb.x -input_images</b>

<b>For case (1)</b> a file containing special KEYWORDS (aka SUPERCARDS) has to be
written (see below). These KEYWORDS tell the parser which part of the file
contains the neb specifics and which part contains the energy/force engine
input (at the moment only PW).  After the parsing, different files are
generated: neb.dat, with the neb specific variables, and a set of pw_*.in
PWscf input files, i.e.,