/lib/systemd/system/systemd-udev-trigger.service is in udev 237-3ubuntu10.
This file is owned by root:root, with mode 0o644.
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 | # SPDX-License-Identifier: LGPL-2.1+
#
# This file is part of systemd.
#
# systemd is free software; you can redistribute it and/or modify it
# under the terms of the GNU Lesser General Public License as published by
# the Free Software Foundation; either version 2.1 of the License, or
# (at your option) any later version.
[Unit]
Description=udev Coldplug all Devices
Documentation=man:udev(7) man:systemd-udevd.service(8)
DefaultDependencies=no
Wants=systemd-udevd.service
After=systemd-udevd-kernel.socket systemd-udevd-control.socket
Before=sysinit.target
ConditionPathIsReadWrite=/sys
[Service]
Type=oneshot
RemainAfterExit=yes
ExecStart=/bin/udevadm trigger --type=subsystems --action=add ; /bin/udevadm trigger --type=devices --action=add
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