/usr/share/votca/scripts/inverse/linsolve.m is in votca-csg-scripts 1.2.4-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 | A = load('$name.gmc');
b = load('$name.imc');
x(:,1)=b(:,1);
x(:,2) = -linsolve(A,b(:,2));
save '$name_out' x '-ascii'
quit
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