SIOCDELRT error when try to delete a single route from route table

If you want to delete a single route from the route table, you have to specify enough parameters to make this route unique.

For example, this gives you an error, because the mask is not specified:

$ sudo route del -net 192.168.5.0
SIOCDELRT: No such process

This gives you a successful output, because the mask is properly specified:

$ sudo route del -net 192.168.5.0/24