To install yacpi just follow these instructions.
sudo apt-get install yacpi
Which will install yacpi and any other packages on which it depends.
|Maintainer||Debian QA Group <email@example.com>|
|Description||ncurses based acpi monitor for text mode ACPI monitoring program for notebooks. There is also a text-only output so it is possible to include it in scripts. It displays various ACPI information like battery status, temperature, charging circuits and AC status. Additionally it displays CPU governor and current frequency.|