/usr/sbin/powerwake-now is in powernap 2.21-0ubuntu1.
This file is owned by root:root, with mode 0o755.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 | #!/bin/sh -e
#
# powerwake-now - send powernapd the 'wakeup' signal
#
# Copyright (C) 2011 Canonical Ltd.
#
# Authors: Andres Rodriguez <andreserl@canonical.com>
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, version 3 of the License.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
PKG="powernap"
PIDFILE=/var/run/$PKG.pid
if [ -r $PIDFILE ]; then
echo "Sending $PKG the 'wakeup' signal"
kill -USR2 $(cat $PIDFILE)
exit $?
else
echo "$PKG does not appear to be running"
exit 1
fi
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