/etc/init.d/single is in initscripts 2.88dsf-59.
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 32 33 34 35 | #! /bin/sh
### BEGIN INIT INFO
# Provides: single
# Required-Start: $local_fs $all killprocs
# Required-Stop:
# Default-Start: 1
# Default-Stop:
# Short-Description: executed by init(8) upon entering runlevel 1 (single).
### END INIT INFO
PATH=/sbin:/bin
. /lib/lsb/init-functions
do_start () {
log_action_msg "Will now switch to single-user mode"
exec init -t1 S
}
case "$1" in
start)
do_start
;;
restart|reload|force-reload)
echo "Error: argument '$1' not supported" >&2
exit 3
;;
stop|status)
# No-op
;;
*)
echo "Usage: $0 start|stop" >&2
exit 3
;;
esac
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