Install system service bash script

iss.sh

#!/bin/sh
fullpath=$(realpath $1)
dirpath=$(dirname $fullpath)
name=$(basename $1)
service_file=/etc/systemd/system/$name.service

echo "[Unit]" > $service_file
echo "Description=$name" >> $service_file
echo "After=network.target" >> $service_file
echo "[Service]" >> $service_file
echo "User=$USER" >> $service_file
#echo "Group=www-data" >> $service_file
echo "WorkingDirectory=$dirpath" >> $service_file
echo "ExecStart=$fullpath" >> $service_file
for ((i=2; i<=$#; i++))
do
        echo "Environment=\"${!i}\"" >> $service_file
done
echo "[Install]" >> $service_file
echo "WantedBy=multi-user.target" >> $service_file

sudo systemctl daemon-reload
systemctl enable $name.service
systemctl start $name.service