Install libamu4 by entering the following commands in the terminal:
sudo apt update sudo apt install libamu4
Description:
Support library for amd the 4.4BSD automounter (runtime)
Libamu contains a support library needed by the am-utils automounter utilities from the am-utils package.
Homepage: http://www.am-utils.org/
Version: 6.2+rc20110530-3.2ubuntu2
Section: universe/libs