Undo routing table addition

Question

I followed the instructions in this question to add an entry to my routing table to solve my collision problem while on a public Wi-Fi network. This is what I ran:

ip route add 10.52.0.14/32 dev tun0

The problem is now I always have to connect to VPN (tun0) to access that IP, even when I am on the university network.

1. How do I remove this entry? I can't seem to get the syntax of ip route del correct.
2. Is there a way to persist this and not have to add/remove the entry every time I am on a public Wi-Fi network?
3. In the add command, what does dev mean?

Answer 1

1. To remove the route execute ip route del 10.52.0.14
2. For Debian-based distros, you could add an entry to /etc/network/interfaces (see this question for details)
3. dev indicates that the parameter that follows (in your case tun0) is the network device to operate on