modify /etc/hosts
sudo bash -c 'curl -sL https://raw.githubusercontent.com/OSMeteor/systools/master/hosts/modifyhosts.sh | bash'
sudo bash -c 'curl -sL https://raw.githubusercontent.com/OSMeteor/systools/master/hosts/modifyhosts.sh > ${LOCALHOSTPATH}'
sudo chmod +x LOCALHOSTPATH