pi@raspberrypi:/etc $ fr24feed --help
/dev/shm/decoder.txt: Permission denied
[main][e]Could not create monitor file!
Could not open /var/log/fr24feed/fr24feed.log for writing!
______  _  _         _      _                    _              _____    ___
|  ___|| |(_)       | |    | |                  | |            / __  \  /   |
| |_   | | _   __ _ | |__  | |_  _ __  __ _   __| |  __ _  _ __`' / /' / /| |
|  _|  | || | / _` || '_ \ | __|| '__|/ _` | / _` | / _` || '__| / /  / /_| |
| |    | || || (_| || | | || |_ | |  | (_| || (_| || (_| || |  ./ /___\___  |
\_|    |_||_| \__, ||_| |_| \__||_|   \__,_| \__,_| \__,_||_|  \_____/    |_/
               __/ |
              |___/
[main][i]FR24 Feeder/Decoder
[main][i]Version: 1.0.26-5/generic
[main][i]Built on Sep 15 2020 08:05:17 (HEAD-3d4a88a.git/Linux/static_armel)
[main][i]Running on: pi24-raspbian10
[main][i]Local IP(s): 192.168.11.60
[main][i]Copyright 2012-2020 Flightradar24 AB
[main][i]https://www.flightradar24.com
[main][i]DNS mode: PING

============================================================================

pi@raspberrypi:/etc $ fr24feed --help
(trimmed)
FR24 Feeder/Decoder usage:
fr24feed --fr24key=0123456789ABCDEF| Start feeding process manually
fr24feed --signup                  | Sign up and configure
fr24feed --reconfigure             | Change configuration
fr24feed --version                 | Show binary version number

============================================================================

pi@raspberrypi:/etc $ sudo fr24feed-status
[ ok ] FR24 Feeder/Decoder Process: running.
[ ok ] FR24 Stats Timestamp: 2020-10-10 22:02:26.
[ ok ] FR24 Link: connected [UDP].
[ ok ] FR24 Radar: T-KWVI31.
[ ok ] FR24 Tracked AC: 8.
[ ok ] Receiver: connected (707597 MSGS/0 SYNC).
[ ok ] FR24 MLAT: ok [UDP].
[ ok ] FR24 MLAT AC seen: 7.

============================================================================

sudo service fr24feed stop
sudo service fr24feed start
sudo service fr24feed restart
sudo fr24feed --help
sudo systemctrl restart fr24feed  ???
sudo fr24feed-status

sudo service dump1090-mutability restart      Restart Dump1090-Mutability
sudo service dump1090-mutability start        Start Dump1090-Mutability
sudo service dump1090-mutability stop         Stop Dump1090-Mutability
cat /var/log/dump1090-mutability.log          (Check Dongle)
sudo nano /etc/default/dump1090-mutability    Make Dump1090 changes
sudo dpkg-reconfigure dump1090-mutability     (The GUI way)

/etc/fr24feed.ini   Config file.

http://IP_address:8754
nload                            network traffic monitor
sudo apt-get install nload       Install nload

===========================================================================
# /etc/wpa_supplicant/wpa_supplicant.conf

ctrl_interface=DIR=/var/run/wpa_supplicant GROUP=netdev
update_config=1

network={
    ssid="Your_WiFi_SSID"
    psk="xxxxxxxxxx"
    proto=RSN
    key_mgmt=WPA-PSK
    pairwise=CCMP
    auth_alg=OPEN
}

===========================================================================

#  /etc/fr24feed.conf

receiver="beast-tcp"
fr24key="xxxxxxxxxxxx"
host="127.0.0.1:30005"
path="/usr/lib/fr24/dump1090"
bs="no"
raw="no"
logmode="1"
logpath="/var/log/fr24feed"
mlat="yes"
mlat-without-gps="yes"
procargs="--gain 40" 

===========================================================================

Port Numbers

30001  AVR RAW IN
30002  AVR RAW OUT
30334  AVR RAW OUT OTHER
10001  SBS Feed (Kinetic Avionics only)
30003  SBS Base Station OUT
30004  BEAST BIN IN
30104  BEAST BIN IN 
30005  BEAST BIN OUT

===========================================================================