This file is indexed.

/usr/share/scalapack/HRD.dat is in scalapack-test-common 1.8.0-13.

This file is owned by root:root, with mode 0o644.

The actual contents of the file can be viewed below.

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'ScaLAPACK HRD input file'
'MPI machine'
'HRD.out'		output file name (if any)
6			device out
4			number of problems sizes
50 50 50 50		values of N
1  2  3  5		values of ILO
50 48 45 49		values of IHI
3			number of NB's
2 3 4		 	values of NB
4			number of processor grids (ordered pairs of P & Q)
1 2 1 4 2 3 8           values of P
1 2 4 1 3 2 1           values of Q
3.0			threshold