#!/bin/bash

# Function to get user input
get_input() {
    read -p "$1: " input
    echo $input
}

# Backup reminder
echo "Always backup your server data before making changes."
read -p "Have you backed up your data? (yes/no): " backup_confirm
if [ "$backup_confirm" != "yes" ]; then
    echo "Please backup your data before proceeding."
    exit 1
fi

# Get the current NIC names and MAC addresses
echo "Fetching current network interfaces..."
ifconfig | grep -o -E 'eth[0-9]' | while read -r nic; do
    mac=$(cat /sys/class/net/$nic/address)
    echo "Interface: $nic, MAC Address: $mac"
    new_name=$(get_input "Enter new name for $nic (e.g., ens192)")

    # Update udev rules
    echo "Updating udev rules..."
    echo "SUBSYSTEM==\"net\", ACTION==\"add\", DRIVERS==\"?*\", ATTR{address}==\"$mac\", ATTR{type}==\"1\", KERNEL==\"eth*\", NAME=\"$new_name\"" | sudo tee -a /etc/udev/rules.d/70-persistent-net.rules

    # Rename network script files
    echo "Renaming network script files..."
    sudo mv /etc/sysconfig/network-scripts/ifcfg-$nic /etc/sysconfig/network-scripts/ifcfg-$new_name

    # Update DEVICE parameter in network script files
    echo "Updating DEVICE parameter..."
    sudo sed -i "s/DEVICE=$nic/DEVICE=$new_name/g" /etc/sysconfig/network-scripts/ifcfg-$new_name
done

# Disable predictable network interface names
echo "Disabling predictable network interface names..."
sudo sed -i '/GRUB_CMDLINE_LINUX=/ s/"$/ net.ifnames=0 biosdevname=0"/' /etc/default/grub

# Regenerate GRUB configuration
echo "Regenerating GRUB configuration..."
sudo grub2-mkconfig -o /boot/grub2/grub.cfg

# Reboot the system
echo "Rebooting the system..."
sudo reboot