$ ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
    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
2: eth0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc fq_codel state DOWN group default qlen 1000
    link/ether 2c:cf:67:c5:db:b3 brd ff:ff:ff:ff:ff:ff
    altname end0
3: eth1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000
    link/ether 44:ed:57:00:07:0a brd ff:ff:ff:ff:ff:ff
    altname enu1u4
    inet 10.39.91.200/24 brd 10.39.91.255 scope global dynamic noprefixroute eth1
       valid_lft 43193sec preferred_lft 37793sec
4: can_s4: <NOARP,UP,LOWER_UP,ECHO> mtu 16 qdisc pfifo_fast state UP group default qlen 1000
    link/can 
5: can_s3: <NOARP,UP,LOWER_UP,ECHO> mtu 16 qdisc pfifo_fast state UP group default qlen 1000
    link/can 
6: can_s2: <NOARP,UP,LOWER_UP,ECHO> mtu 16 qdisc pfifo_fast state UP group default qlen 1000
    link/can 
7: can_s1: <NOARP,UP,LOWER_UP,ECHO> mtu 16 qdisc pfifo_fast state UP group default qlen 1000
    link/can 
8: can_s0: <NOARP,UP,LOWER_UP,ECHO> mtu 16 qdisc pfifo_fast state UP group default qlen 1000
    link/can 
9: wlan0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000
    link/ether 2c:cf:67:c5:db:b4 brd ff:ff:ff:ff:ff:ff
    inet 172.30.0.1/24 brd 172.30.0.255 scope global noprefixroute wlan0
       valid_lft forever preferred_lft forever
10: usb0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc fq_codel state DOWN group default qlen 1000
    link/ether 00:1a:2b:62:31:f5 brd ff:ff:ff:ff:ff:ff
    inet 172.29.0.1/24 brd 172.29.0.255 scope global usb0
       valid_lft forever preferred_lft forever
11: usb1: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc fq_codel state DOWN group default qlen 1000
    link/ether 00:1a:2d:62:31:f5 brd ff:ff:ff:ff:ff:ff
    inet 172.28.0.1/24 brd 172.28.0.255 scope global usb1
       valid_lft forever preferred_lft forever
12: docker0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN group default 
    link/ether 02:42:3f:f8:6e:eb brd ff:ff:ff:ff:ff:ff
    inet 172.17.0.1/16 brd 172.17.255.255 scope global docker0
       valid_lft forever preferred_lft forever
$ sudo ip addr del 10.39.91.200/24 dev eth1 && sudo ip addr add 10.39.91.2/32 dev eth1
$ ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
    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
2: eth0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc fq_codel state DOWN group default qlen 1000
    link/ether 2c:cf:67:c5:db:b3 brd ff:ff:ff:ff:ff:ff
    altname end0
3: eth1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000
    link/ether 44:ed:57:00:07:0a brd ff:ff:ff:ff:ff:ff
    altname enu1u4
    inet 10.39.91.2/32 scope global eth1
       valid_lft forever preferred_lft forever
    inet 10.39.91.200/24 brd 10.39.91.255 scope global dynamic noprefixroute eth1
       valid_lft 43192sec preferred_lft 37792sec
4: can_s4: <NOARP,UP,LOWER_UP,ECHO> mtu 16 qdisc pfifo_fast state UP group default qlen 1000
    link/can 
5: can_s3: <NOARP,UP,LOWER_UP,ECHO> mtu 16 qdisc pfifo_fast state UP group default qlen 1000
    link/can 
6: can_s2: <NOARP,UP,LOWER_UP,ECHO> mtu 16 qdisc pfifo_fast state UP group default qlen 1000
    link/can 
7: can_s1: <NOARP,UP,LOWER_UP,ECHO> mtu 16 qdisc pfifo_fast state UP group default qlen 1000
    link/can 
8: can_s0: <NOARP,UP,LOWER_UP,ECHO> mtu 16 qdisc pfifo_fast state UP group default qlen 1000
    link/can 
9: wlan0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000
    link/ether 2c:cf:67:c5:db:b4 brd ff:ff:ff:ff:ff:ff
    inet 172.30.0.1/24 brd 172.30.0.255 scope global noprefixroute wlan0
       valid_lft forever preferred_lft forever
10: usb0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc fq_codel state DOWN group default qlen 1000
    link/ether 00:1a:2b:62:31:f5 brd ff:ff:ff:ff:ff:ff
    inet 172.29.0.1/24 brd 172.29.0.255 scope global usb0
       valid_lft forever preferred_lft forever
11: usb1: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc fq_codel state DOWN group default qlen 1000
    link/ether 00:1a:2d:62:31:f5 brd ff:ff:ff:ff:ff:ff
    inet 172.28.0.1/24 brd 172.28.0.255 scope global usb1
       valid_lft forever preferred_lft forever
12: docker0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN group default 
    link/ether 02:42:3f:f8:6e:eb brd ff:ff:ff:ff:ff:ff
    inet 172.17.0.1/16 brd 172.17.255.255 scope global docker0
       valid_lft forever preferred_lft forever