How to setup and configure network bridge on Debian Linux

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To set up and configure a network bridge on Debian Linux, follow these steps:

  1. Install the required packages:
    sudo apt-get update
    sudo apt-get install bridge-utils -y
  2. Create a backup of your network interfaces configuration file:
    sudo cp /etc/network/interfaces /etc/network/interfaces.bak
  3. Edit the network interfaces configuration file:
    sudo nano /etc/network/interfaces
  4. Define the network bridge, replace eth0 with the name of your Ethernet interface:
    auto br0
    iface br0 inet dhcp
    bridge_ports eth0
    bridge_stp off
    bridge_fd 0
    bridge_maxwait 0
  5. Restart the networking service to apply the changes:
    sudo systemctl restart networking
  6. Verify the network bridge is up and running:
    sudo brctl show
  7. Verify the IP address of the bridge interface:
    ip addr show br0

Now, your Debian Linux system is configured with a network bridge that is using DHCP to obtain an IP address. You can modify the configuration as needed, for example, to use a static IP address.

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