Install augeas-lenses by entering the following commands in the terminal:
sudo apt update sudo apt install augeas-lenses
Set of lenses needed by libaugeas0 to parse config files
Augeas parses configuration files described in lenses into a tree structure, which it exposes through its public API. Changes made through the API are written back to the initially read files. . Lenses are the building blocks of the file <-> tree transformation; they combine parsing a file and building the tree (the get transformation), with turning the tree back into an (updated) file (the put transformation). . The transformation works very hard to preserve comments and formatting details. It is controlled by ``lens'' definitions that describe the file format and the transformation into a tree. This package includes the official set of lenses.