del-interface-addresses.sh

#!/usr/bin/env sh

IPVERSION="$1"
INTERFACE="$2"
case ${IPVERSION} in
        4|v4|ipv4|ip4|6|v6|ipv6|ip6)
        ;;
        *)
                echo "Missing ip version to remove: 4 or 6"
                exit 1
        ;;
esac

if [ -z "${INTERFACE}" ]
then
        INTERFACES_LIST=$( ip -o l |awk '{print $2}' |sed -e 's@:@@' |grep -v "lo")
        echo "## missing interface name, these are the available interfaces:"
        echo "${INTERFACES_LIST}"
        exit 2
fi

case ${IPVERSION} in
        4|v4|ipv4|ip4)
                ip -o a|grep "${INTERFACE}\ "|grep "inet\ "|awk '{print $4}'|xargs -I{} ip address del {} dev ${INTERFACE}
        ;;
        6|v6|ipv6|ip6)
                ip -o a|grep "${INTERFACE}\ "|grep "inet6\ "|awk '{print $4}'|xargs -I{} ip address del {} dev ${INTERFACE}
        ;;
        *)
        ;;
esac