在启动项(lilo.conf,menu.lst)后面加上 acpi=on

在debian 下，apt-get install acpid就行了,可以用power开关来关机了。

看acpid有哪些文件，感兴趣的可以看看这些文件。
dpkg -L acpid
/usr/sbin/acpid
/usr/bin/acpi_listen
/usr/share/man/man8/acpid.8.gz
/usr/share/man/man8/acpi_listen.8.gz
/usr/share/doc/acpid/examples
/usr/share/doc/acpid/examples/default.gz
/usr/share/doc/acpid/examples/ac.gz
/usr/share/doc/acpid/examples/ac.sh.gz
/usr/share/doc/acpid/examples/default.sh.gz
/usr/share/doc/acpid/README.gz
/usr/share/doc/acpid/copyright
/usr/share/doc/acpid/changelog.gz
/usr/share/doc/acpid/changelog.Debian.gz
/etc/init.d/acpid
/etc/logrotate.d/acpid
/etc/default/acpid
/etc/acpi/events/powerbtn
/etc/acpi/powerbtn.sh