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161 - How to use ifconfig

The "ifconfig" command allows the operating system to setup network interfaces and allow the user to view information
about the configured network interfaces.

Example :

  • View the network settings on the first Ethernet adapter installed in the computer.
# ifconfig eth0
  • Display info on all network interfaces on server, active or inactive.
# ifconfig -a
  • Activate eth0
# ifconfig eth0 up
  • Deactivate eth0
# ifconfig eth0 down
  • Assign eth0 with the following values for IP, netmask and broadcast address.
# ifconfig eth0 netmask broadcast






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