Linux Command Directory
This directory of Linux commands is from Linux in a Nutshell, 5th Edition.
Click on any of the 687 commands below to get a description and list of available options. All links in the command summaries point to the online version of the book on Safari Bookshelf.
Daemon that informs user-space programs about ACPI (Advanced Configuration and Power Interface) events, such as battery warnings, power-supply changes, and laptop lid closings. As ACPI hardware replaces older APM (Advanced Power Management) hardware, acpid replaces apmd. Like other daemons, this application is controlled primarily through a configuration file that determines which events merit action, and what those actions are. In some operating systems, including SUSE Linux and its relatives, all power management is handled by a combined ACPI/APM system called powersave and this daemon is not installed.
Set the directory used for configuration files. The default directory is /etc/acpi/events. All files in this directory, except those beginning with a period (.), are parsed as configuration files. Typically, a single file is used for each ACPI event to be acted upon.
In the configuration files, blank lines and those beginning with # are ignored. Other lines are expected to consist of a regular expression and a command to be executed when an ACPI event matches the expression.
Debug mode: run the daemon in the foreground and send all log output to stderr and stdout, rather than a logfile.
Set the file used to find events. Normally this is
Set the group ownership of the socket to which acpid publishes events. This allows you to restrict which users on the system can access ACPI event information.
Set the logfile location. Normally, it is
Set the permission mode of the socket. Normally, it is 666, with the sticky bit off.
Set the file used to define the socket. Normally, this is
Tells acpid not to open a socket at all. Overrides all other socket options.
Print version information and quit.
Print help message and quit.