Updates the IP in Ubuntu based on netplan

update_ip.sh

#!/bin/bash

echo "Available network interfaces:"
ip link show | awk -F: '$0 !~ "lo|vir|wl|^[^0-9]"{print $2;getline}'
read -p "Choose the network interface to modify (e.g., enp0s3): " INTERFACE

echo "Available netplan configuration files:"
ls /etc/netplan
read -p "Choose the netplan configuration file to modify (e.g., 01-netcfg.yaml): " NETPLAN_FILE

read -p "Enter the IP address and subnet mask in CIDR notation (e.g., 192.168.1.2/24): " IP_ADDRESS
read -p "Enter the gateway IP address (e.g., 192.168.1.1): " GATEWAY_ADDRESS
read -p "Enter the primary DNS IP address (e.g., 8.8.8.8): " PRIMARY_DNS_ADDRESS
read -p "Enter the secondary DNS IP address (e.g., 8.8.4.4): " SECONDARY_DNS_ADDRESS

NETPLAN_CONFIG=$(cat << EOF
network:
  version: 2
  ethernets:
    $INTERFACE:
      dhcp4: no
      addresses:
        - $IP_ADDRESS
      gateway4: $GATEWAY_ADDRESS
      nameservers:
        addresses: [$PRIMARY_DNS_ADDRESS, $SECONDARY_DNS_ADDRESS]
EOF
)

echo "Updating netplan configuration file..."
echo "$NETPLAN_CONFIG" | sudo tee /etc/netplan/$NETPLAN_FILE > /dev/null

read -p "Do you want to apply the changes with 'netplan apply' or 'netplan try'? (apply/try): " NETPLAN_ACTION

if [ "$NETPLAN_ACTION" == "apply" ]; then
  echo "Applying changes with 'netplan apply'..."
  sudo netplan apply
elif [ "$NETPLAN_ACTION" == "try" ]; then
  echo "Applying changes with 'netplan try'..."
  sudo netplan try
else
  echo "Invalid input. Exiting without applying changes."
fi