Install db5.3-doc by entering the following commands in the terminal:
sudo apt update sudo apt install db5.3-doc
Description:
Berkeley v5.3 Database Documentation [html]
This package contains documentation in HTML format for all of the APIs (C, C++, C#, STL, Java, Tcl) and utilities provided by version 5.3 of Berkeley DB.
Homepage: http://www.oracle.com/technetwork/database/database-technologies/berkeleydb/overview/index.html
Version: 5.3.28-13.1ubuntu1
Section: doc