How to install htmlunit package?

[hopewise]

When I try to run JUnit test in selenium at Ubuntu 18, I get this error:

10:48:09 ERROR: Child Process Error: Javac exited with code: 1
 /home/ubuntu/bzt/sel/VL.java:2: error: package org.openqa.selenium.htmlunit does not exist
import org.openqa.selenium.htmlunit.HtmlUnitDriver;
                                   ^
/home/ubuntu/bzt/sel/VL.java:83: error: cannot find symbol
    HtmlUnitDriver driver;
    ^

How would I install that missing package? I am using Taurus CLI Tool v1.14.2