gistfile1.sh

#!/bin/sh
set -e

IP=`sudo docker inspect -f '{{ .NetworkSettings.IPAddress }}' ${1}`
HOST=$2

[ -z "$HOST" ] && exit 1;

sudo sed -i "s/.*\s${HOST}$/${IP} ${HOST}/" /etc/hosts

grep -P "\s${HOST}$" /etc/hosts > /dev/null || sudo -- sh -c "echo \"${IP} ${HOST}\" >> /etc/hosts"



grep -P "^${IP} ${HOST}$" /etc/hosts > /dev/null

if [ $? -eq 0 ]; then
    echo "Set host: ${IP} ${HOST}"
else
    echo "Fail to update the host file with: ${IP} ${HOST}"
fi