How can my bash script detect if the computer is on battery power (or not)?

Programming Tips - Old - How can my bash script detect if the computer is on battery power (or not)?

Date: 2013mar4 Language: bash OS: Linux Q. How can my bash script detect if the computer is on battery power (or not)? A. You can use the on_ac_power command like this: if on_ac_power; then echo 'On AC -- ie plugged in' else echo 'Using battery' # Maybe do less work fi On RedHat/Fedora/CentOS this is in the pm-utils package (Power Management)