Behändiga skript för automatisering av setup/inställningar? (Raspberry Pi)

#!/bin/sh

DHCPCFG="/etc/dhcpcd.conf"



NIC=$(ip r show | grep default | awk '{print $5}')

echo "This is the connected Network Interface:$NIC"
sleep 1

IPINTERN=$(ip r show | grep default | awk '{print $7}')
echo "This is the local IP:$IPINTERN"
sleep 1

IPROUTER=$(ip r show | grep default | awk '{print $3}')
echo "This is the router IP:$IPROUTER"
sleep 1



#the first -v flag excludes reading lines that are commented out with the symbols ^\#
echo "Checking if $DHCPCFG already contains Static IP configuration"
sleep 1

#Beginning of local Static IP setup in /etc/dhcpcd.conf

if grep -v ^\#  $DHCPCFG | grep -Fq "interface $NIC"

then
	echo "interface $NIC already exists"
else
	echo "$NIC is not set as Network Interface for Static IP"
	sleep 1
	echo "Adding $NIC as source NIC for Static IP"
	echo "interface $NIC" >> $DHCPCFG
fi


#Adding currently assigned local IP as local Static IP in /etc/dhcpcd.conf

if grep -v ^\#  $DHCPCFG | grep -Fq "static ip_address=$IPINTERN/24"
then
	echo "$IPINTERN is already set as the Static IP"
else
	echo "$IPINTERN is NOT set as the Static IP"
	sleep 1
	echo "Adding $IPINTERN as Static IP"
	sleep 1
	echo "static ip_address=$IPINTERN/24" >> $DHCPCFG
	

fi

#Adding routers IP as Static Router IP in /etc/dhcpcd.conf

if grep -v ^\#  $DHCPCFG | grep -Fq "static routers=$IPROUTER"
then
	echo "$IPROUTER is already set as the Static Router IP"
else
	echo "$IPROUTER is NOT set as the Static Router IP"
	sleep 1
	echo "Adding $IPROUTER as Static Router IP"
	sleep 1
	echo "static routers=$IPROUTER" >> $DHCPCFG
	

fi

#Adding Quad9 as Static DNS in /etc/dhcpcd.conf

if grep -v ^\#  $DHCPCFG | grep -Fq "static domain_name_servers=9.9.9.9 149.112.112.112 2620:fe::fe"
then
	echo "Quad9 DNS is already set as Static DNS"
else
	echo "Quad9 DNS is NOT set as Static DNS"
	sleep 1
	echo "Adding Quad9 DNS as Static DNS"
	sleep 1
	echo "static domain_name_servers=9.9.9.9 149.112.112.112 2620:fe::fe" >> $DHCPCFG
	

fi

echo You should restart the server now!

#!/bin/bash

set -eu

# IPINTERN=$(ip -4 addr show eth0 | grep -oP '(?<=inet\s)\d+(\.\d+){3}')

NIC=$(ip addr show | awk '/inet.*brd/{print $NF; exit}')
MULTINICS=$(ip addr show | awk '/inet.*brd/{print $NF}')

IP4INT=$(hostname -I | cut -d ' ' -f 1)
IP6INT=$(hostname -I | cut -d ' ' -f 2)
IP4ROUTER=$(ip r | grep -i 'default via'| cut -d ' ' -f 3)
DHCPCD=/etc/dhcpcd.conf

echo "Local IPv4:"
sleep 0.05
echo "$IP4INT"
sleep 0.05
echo -e "\n"
sleep 0.05
echo "Local IPv6:"
sleep 0.05
echo "$IP6INT"
sleep 0.05
echo -e "\n"
sleep 0.05
echo "Local Router IPv4:"
sleep 0.05
echo "$IP4ROUTER"
sleep 0.05
echo -e "\n"
sleep 0.05


read -p "Proceed with static IP configuration with above IP addresses (y/n)?" choice
case "$choice" in
  y|Y ) echo -e "\n"
        sleep 0.05
        echo "Proceeding with static IP configuration."
        ;;
  n|N ) echo "Script is exiting..."
        sleep 1
        exit
        ;;
  * ) echo "invalid";;
esac

echo -e "\n"
sleep 0.05

TIME=$(date +"%Y%m%d%H%M")
echo "Backing up $DHCPCD to $DHCPCD.$TIME.backup"
sudo cp $DHCPCD $DHCPCD.$TIME.backup

echo -e "\n"
sleep 0.05
echo -e "\n"
sleep 0.05

echo "Appending: interface $NIC into $DHCPCD"
sleep 0.05
sudo grep -xqF -- "interface $NIC" "$DHCPCD" || sudo echo "interface $NIC" >> "$DHCPCD"

echo -e "\n"
sleep 0.05

echo "Appending: static ip_address=$IP4INT/24 into $DHCPCD"
sleep 0.05
sudo grep -xqF -- "static ip_address=$IP4INT/24" "$DHCPCD" || sudo echo "static ip_address=$IP4INT/24" >> "$DHCPCD"

echo -e "\n"
sleep 0.05

echo "Appending: static routers=$IP4ROUTER into $DHCPCD"
sleep 0.05
sudo grep -xqF -- "static routers=$IP4ROUTER" "$DHCPCD" || sudo echo "static routers=$IP4ROUTER" >> "$DHCPCD"

echo -e "\n"
sleep 0.05

echo "Appending: static domain_name_servers=9.9.9.9 149.112.112.112 2620:fe::fe into $DHCPCD"
sleep 0.05
sudo grep -xqF -- "static domain_name_servers=9.9.9.9 149.112.112.112 2620:fe::fe" "$DHCPCD" || sudo echo "static domain_name_servers=9.9.9.9 149.112.112.112 2620:fe::fe" >> "$DHCPCD"

echo -e "\n"
sleep 0.05

read -p "Would you like to reboot now (y/n)?" choice
case "$choice" in
  y|Y ) echo "Rebooting..."
        sleep 1
        sudo reboot now
        ;;
  n|N ) echo "Script is exiting..."
        sleep 0.5
        exit
        ;;
  * ) echo "invalid";;
esac