`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`