Check router (gateway) of specific interface

get_gw_by_iface.sh

get_gw_by_iface(){
  # Return router ip of interface
  # Usage: get_gw_by_iface IFACE
  sudo traceroute -n -i $1 -m1 $(get-extip) 2>/dev/null | tail -1 | awk '{print $2}'
}

get_gw_by_iface2(){
  # Return router ip of interface (multitable)
  # Usage: get_gw_by_iface IFACE
  ip route list table all | awk '/default via/' | grep enp1s0 | awk '{print $3}'
}