/usr/share/gretl/scripts/ps8-5.inp is in gretl-common 1.9.14-2.
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 | # PS8.5, for Example 8.6 and the HCCM procedure
open data8-1
genr LNSALARY=ln(SALARY)
genr YRS2 = YEARS*YEARS
ols LNSALARY const YEARS YRS2 --vcv
ols LNSALARY const YEARS YRS2 --vcv --jackknife
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