linux无法自动获取ip

sudo systemctl status dhclient

sudo systemctl start dhclient

sudo systemctl enable dhclient

ip addr show

auto eth0
iface eth0 inet dhcp

network:
  version: 2
  renderer: networkd
  ethernets:
    eth0:
      dhcp4: true

sudo netplan apply

sudo ufw allow dhcp

#!/bin/bash

# Check if DHCP client is running
if ! systemctl is-active --quiet dhclient; then
    echo "Starting DHCP client..."
    sudo systemctl start dhclient
    sudo systemctl enable dhclient
fi

# Check network interface status
INTERFACE=$(ip route get 1 | awk '{print $5; exit}')
if ! ip link show $INTERFACE | grep -q "state UP"; then
    echo "Enabling network interface $INTERFACE..."
    sudo ip link set $INTERFACE up
fi

# Apply Netplan configuration (if applicable)
if [ -f /etc/netplan/*.yaml ]; then
    echo "Applying Netplan configuration..."
    sudo netplan apply
fi

echo "Network setup complete."