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. A
computer running a Linux kernel from the 2.4.x or
2.6.x series with ACPI enabled is needed.
It also supports various extensions for Toshiba, Asus, and IBM Thinkpad laptops.