/usr/share/doc-base/gnuplot-pdf is in gnuplot-doc 4.6.4-2.
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 7 8 | Document: gnuplot-pdf
Title: FAQ
Author: Various
Abstract: Frequently Asked Question
Section: Science/Mathematics
Format: PDF
Files: /usr/share/doc/gnuplot-doc/FAQ.pdf.gz
|