ifplugd binary package in Ubuntu Bionic amd64

 ifplugd is a daemon which will automatically configure your ethernet device
 when a cable is plugged in and automatically de-configure it if the cable is
 pulled out. This is useful on laptops with onboard network adapters, since it
 will only configure the interface when a cable is really connected. Features
 include:
 .
  * syslog support
  * Multiple ethernet interface support
  * Uses Debian's native ifup/ifdown programs
  * Small executable size and memory footprint
  * Option to beep when the cable is unplugged or plugged
  * Option to beep when the interface configuration succeeds or fails
  * Can be configured to ignore short unplugged or plugged periods
  * Configure WLAN devices (on detecting a successful association to an AP)
  * Supports SIOCETHTOOL, SIOCGMIIREG and SIOCDEVPRIVATE for getting link status
  * Compatibility mode for network devices which do not support cable detection

Source package