Is "inet addr" my or "bcast" my machine's actual IP? [closed]
10.0.2.15 is your system's address, .255 is the broadcast address for the subnet.
/24 is CIDR notation for the subnet mask; it means that 24 bits of the 32 bit IPv4 address are the network and the other 8 bits are the addresses within the subnet.
See this question for more information.