sudo apt install wget build-essential cmake pkg-config libmp3lame-dev libshout3-dev libconfig++-dev libfftw3-dev

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 make & 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 = "icecast";
          server = "audio#.broadcastify.com";
          port = 80;
          mountpoint = "MOUNTPOINT";  # Do not include the slash "/"
          name = “Aviation Name";
          genre = "Aviation";
          username = "source";
          password = "PASSWORD";
        }
      );
    }
  );
});

To Start The Software:

sudo rtl_airband -f

Control c To Stop Software