1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000 link/loopback XXX brd XXX inet XXX scope host lo valid_lft forever preferred_lft forever inet6 XXX scope host valid_lft forever preferred_lft forever 2: wlp4s0f4u2: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP group default qlen 1000 link/ether XXX brd XXX inet XXX brd XXX scope global dynamic noprefixroute wlp4s0f4u2 valid_lft 863585sec preferred_lft 863585sec inet6 XXX scope global dynamic noprefixroute valid_lft 6786sec preferred_lft 3186sec inet6 XXX scope link noprefixroute valid_lft forever preferred_lft forever