Reference

pm(1) on Linux

The text 4aae67e3bcc2, as Debian 11 (Bullseye), Debian 10 (Buster), Debian 9 (Stretch), Debian 8 (Jessie), Debian 7 (Wheezy), Debian 6.0 (Squeeze) shipped it.

power on/off nodes

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pm(1) on Linux now