IP routing policy database management. More information: https://man7.org/linux/man-pages/man8/ip-rule.8.html.
ip rule show|list
sudo ip rule add from 192.168.178.2/32
sudo ip rule add to 192.168.178.2/32
sudo ip rule delete from 192.168.178.2/32
sudo ip rule delete to 192.168.178.2/32
ip rule flush
ip rule save > path/to/ip_rules.dat
ip rule restore < path/to/ip_rules.dat