sudo apt update

sudo apt install build-essential cmake pkg-config libmp3lame-dev libshout3-dev libconfig++-dev libfftw3-dev pavucontrol librtlsdr-dev pulseaudio libpulse-dev -y

Download Software: 
Run Each Line One At A Time:

wget -O RTLSDR-Airband-5.0.0.tar.gz https://github.com/szpajder/RTLSDR-Airband/archive/v5.0.0.tar.gz

tar xvfz RTLSDR-Airband-5.0.0.tar.gz

cd RTLSDR-Airband-5.0.0

Make The Build Dir:

mkdir build
cd build

Let's cmake & install:
Run Each Line One At A Time:

cmake ../
make
sudo make install

Let's Add The Code:

sudo nano /usr/local/etc/rtl_airband.conf

Put The Following And Save

devices:
({
type = "rtlsdr";
index = 0;    
gain = 32;    #Gain Setting
correction = 0;   #ppm
mode = "scan";
channels:
(
{
freqs = ( 123.1, 119.0, 120.5, 132.2 );        #Add Freq's Here
outputs: (
  {
    type = "pulse";
#   server = "192.168.11.10";
#   sink = ... /* default sink */
#   stream_name = "Utility channels";
#   continuous = false;
}
);
}
);
}
);

To Start The Software:

sudo rtl_airband -f

Control c To Stop Software