This file is indexed.

/usr/share/scalapack/LLT.dat is in scalapack-test-common 1.8.0-12.

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, LLt factorization input file'
'MPI machine'
'LLT.out'               output file name (if any)
6			device out
'U'                     define Lower or Upper
4			number of problems sizes
4 10 17 13 23 31 57 	values of N
3			number of NB's
2 3 4 5			values of NB
3			number of NRHS's
1 3 9 28		values of NRHS
3			number of NBRHS's
1 3 5 7			values of NBRHS
4			number of process grids (ordered pairs 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
T                       (T or F) Test Cond. Est. and Iter. Ref. Routines