sudo zerotier-cli leave Network_ID
sudo service zerotier-one stop
sudo dpkg --remove zerotier-one
sudo nano /etc/apt/sources.list
change all the link in source.list with this
deb http://old-releases.ubuntu.com/ubuntu/ precise main restricted universe multiverse
deb http://old-releases.ubuntu.com/ubuntu/ precise-updates main restricted universe multiverse
deb http://old-releases.ubuntu.com/ubuntu/ precise-security main restricted universe multiverse
deb http://old-releases.ubuntu.com/ubuntu/ precise-backports main restricted universe multiverse
sudo apt-get update
sudo apt-get install iproute
sudo dpkg -i --force-depends zerotier-one_1.2.12_amd64.deb
sudo zerotier-cli info
sudo zerotier-cli join Network_ID
zerotier-cli listnetworks
ip addr show zt0