All systemd services description files must be put into following dir on the device:
/lib/systemd/system/


Copy-paste commands for:

# Recent log output
#   -f: don't close immediately and folow unit log output
#   -a: output log lines from process as is (keeps console coloring and other stuff)
#   --output cat: do not prepend log lines with journalctl's timestamps and other fields
#       (only pure raw output from the process)
journalctl -f -a --output cat -u fq4000.service
journalctl -f -a --output cat -u fqlink-backup.service
journalctl -f -a --output cat -u fqlink.service
journalctl -f -a --output cat -u iotagent.service

journalctl -u iotagent.service -b

# !!!Important notice!!!
# Both "fqlink.service" and "iotagent.service" are intended to be disabled by default.
# They are started conditionally by starting "fqlink.service" from FQ4000 service prestart script.
# The condition to start FQLink services pair is running on the master CommonUI (VAT_ID=0).


# Reload unit-description files on disk into systemd daemon
systemctl daemon-reload


# Status check
systemctl status fq4000.service
systemctl status fqlink-backup.service
systemctl status fqlink.service
systemctl status iotagent.service


# Disable/Enable/Unmask/Mask service
systemctl disable fq4000.service
systemctl disable fqlink-backup.service
systemctl disable fqlink.service
systemctl disable iotagent.service

systemctl enable fq4000.service
systemctl enable fqlink-backup.service
systemctl enable fqlink.service
systemctl enable iotagent.service

systemctl unmask fq4000.service
systemctl unmask fqlink-backup.service
systemctl unmask fqlink.service
systemctl unmask iotagent.service

systemctl mask fq4000.service
systemctl mask fqlink-backup.service
systemctl mask fqlink.service
systemctl mask iotagent.service


# Stop/Start/Restart of the service
systemctl stop fq4000.service
systemctl stop fqlink-backup.service
systemctl stop fqlink.service
systemctl stop iotagent.service

systemctl start fq4000.service
systemctl start fqlink-backup.service
systemctl start fqlink.service
systemctl start iotagent.service

systemctl restart fq4000.service
systemctl restart fqlink-backup.service
systemctl restart fqlink.service
systemctl restart iotagent.service
