Install acpitool by entering the following commands in the terminal:
sudo apt update sudo apt install acpitool
Description:
command line ACPI client
AcpiTool is a Linux ACPI client. It's a small command line application, intended to be a replacement for the apm tool. The primary target audience are laptop users, since these people are most interested in things like battery status, thermal status and the ability to suspend (sleep mode). The program simply accesses the /proc/acpi or /sysfs entries to get or set ACPI values. It also supports various extensions for Toshiba, Asus, and IBM Thinkpad laptops.
Homepage: http://sourceforge.net/projects/acpitool/
Version: 0.5.1-4build1
Section: universe/utils