Можно ли сделать вывод?

ifconfig -a | grep "UP" | grep -v "lo" | awk -F ": " '{ print $1 }'

# ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host
       valid_lft forever preferred_lft forever
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
    link/ether 00:16:25:01:de:1d brd ff:ff:ff:ff:ff:ff
    inet 1.1.1.1/24 brd 1.1.1.1 scope global noprefixroute eth0
       valid_lft forever preferred_lft forever
    inet 192.168.0.100/32 brd 192.168.0.100 scope global eth0:1
       valid_lft forever preferred_lft forever
    inet6 fe80::216:25ff:fe01:de1d/64 scope link
       valid_lft forever preferred_lft forever
9: tun0: <POINTOPOINT,MULTICAST,NOARP,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UNKNOWN group default qlen 100
    link/none
    inet 10.0.0.1 peer 10.0.0.2/32 scope global tun0
       valid_lft forever preferred_lft forever

# ifconfig -a | grep "UP" | grep -v "lo" | awk -F ": " '{ print $1 }'
eth0
eth0:1
tun0