sudo apt update 
sudo apt install git cmake
sudo apt install libreoffice  "Not Required, But Nice Way To Edit Files For OP25"

Download The OP25 Software:

git clone https://github.com/boatbod/op25.git

cd op25
./install.sh
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cd /op25/op25/gr-op25_repeater/apps

Make Sure To Edit -f 495.600 Part:

./rx.py --args 'rtl' -N 'LNA:47' -S 2500000 -x 2 -f 495.600e6 -o 17e3 -q 2
--------------------------------------------------------------------------

sudo nano start.sh   "Add The Following To The File And Edit FREQ"

#! /bin/sh

cd /home/pi/op25/op25/gr-op25_repeater/apps

./rx.py --args 'rtl' -N 'LNA:47' -S 2500000 -x 2 -f 495.600e6 -o 17e3 -q 0 -T trunk.tsv -V -2 -U 2> stderr-stream0.2

Save And Exit
----------------------
sudo chmod +x start.sh

./start.sh

Press The Number "1" To Bring Up GnuPlot Display
------------------------------------------------
To Update OP25 Software:

cd ~/op25
./rebuild.sh

Visit Radio Reference For Frequencies You Will Need: “Click Here”