This file is indexed.

/lib/systemd/system/ptp4l.service is in linuxptp 1.6-1.

This file is owned by root:root, with mode 0o644.

The actual contents of the file can be viewed below.

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[Unit]
Description=Precision Time Protocol (PTP) service

[Service]
Type=simple
ExecStart=/usr/sbin/ptp4l -f /etc/linuxptp/ptp4l.conf -i eth0

[Install]
WantedBy=multi-user.target