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 noprefixroute valid_lft forever preferred_lft forever 2: enp12s0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc fq_codel state DOWN group default qlen 1000 link/ether XXX brd XXX 3: enp0s20u3: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UNKNOWN group default qlen 1000 link/ether XXX brd XXX inet XXX brd XXX scope global dynamic noprefixroute enp0s20u3 valid_lft 3414sec preferred_lft 3414sec inet6 XXX scope link noprefixroute valid_lft forever preferred_lft forever 4: wlp3s0b1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000 link/ether XXX brd XXX permaddr XXX inet XXX brd XXX scope global dynamic noprefixroute wlp3s0b1 valid_lft 86224sec preferred_lft 86224sec inet6 XXX scope global dynamic noprefixroute valid_lft 86233sec preferred_lft 86233sec inet6 XXX scope link noprefixroute valid_lft forever preferred_lft forever