I need help with this error

[efogu]

vagrant@web01:$ ping app01
ping: unknown host app01
vagrant@web01:$ ping config.vm.network "public_network", ip: "192.168.33.12"
ping: unknown host config.vm.network

I am running 5 VMs as part of my course. Everything been smooth until I can "ping" the different networks VMs

[evangtim2]

confirm the ip address of your machine and modify the ip address. The ip address used here is just for the author's machine, for other machines it will be different.

[ghost]

check the indentation of the vagrant file and set it to the respective block