This file is indexed.

/usr/share/doc-base/apt-offline-usage-guide is in apt-doc 1.0.1ubuntu2.19.

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
 9
10
11
12
13
Document: apt-offline-usage-guide
Title: APT Offline Usage Guide
Author: Jason Gunthorpe
Abstract: The APT Offline Usage Guide provides detailed instructions and
 examples of how to use APT on an unconnected computer.
Section: Debian

Format: html
Index: /usr/share/doc/apt-doc/offline.html/index.html
Files: /usr/share/doc/apt-doc/offline.html/*.html

Format: text
Files: /usr/share/doc/apt-doc/offline.text.gz