ubuntu@myCPU:/var/cache/bind$ ip address
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
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: eno1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
link/ether 00:10:c6:b1:df:30 brd ff:ff:ff:ff:ff:ff
inet 10.10.6.148/24 brd 10.10.6.255 scope global eno1
valid_lft forever preferred_lft forever
inet6 fe80::210:c6ff:feb1:df30/64 scope link
valid_lft forever preferred_lft forever
3: enp9s0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc pfifo_fast state DOWN group default qlen 1000
link/ether 00:10:c6:b1:df:31 brd ff:ff:ff:ff:ff:ff
inet 169.254.9.33/16 brd 169.254.255.255 scope link enp9s0:avahi
valid_lft forever preferred_lft forever
4: enp2s0f0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc mq state DOWN group default qlen 1000
link/ether a0:36:9f:bc:c0:5c brd ff:ff:ff:ff:ff:ff
inet 169.254.9.117/16 brd 169.254.255.255 scope link enp2s0f0:avahi
valid_lft forever preferred_lft forever
5: enp2s0f1: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc mq state DOWN group default qlen 1000
link/ether a0:36:9f:bc:c0:5e brd ff:ff:ff:ff:ff:ff
inet 192.168.0.166/24 brd 192.168.0.255 scope global enp2s0f1
valid_lft forever preferred_lft forever
inet 192.168.0.1/24 brd 192.168.0.255 scope global secondary enp2s0f1
valid_lft forever preferred_lft forever
ubuntu@myCPU:/var/cache/bind$ sudo ip addr flush dev enp2s0f1
ubuntu@myCPU:/var/cache/bind$ sudo ifdown enp2s0f1
RTNETLINK answers: Cannot assign requested address
ubuntu@myCPU:/var/cache/bind$ sudo ifdown enp2s0f1
ifdown: interface enp2s0f1 not configured
ubuntu@myCPU:/var/cache/bind$ sudo ifup enp2s0f1
ubuntu@myCPU:/var/cache/bind$ ip address
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
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: eno1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
link/ether 00:10:c6:b1:df:30 brd ff:ff:ff:ff:ff:ff
inet 10.10.6.148/24 brd 10.10.6.255 scope global eno1
valid_lft forever preferred_lft forever
inet6 fe80::210:c6ff:feb1:df30/64 scope link
valid_lft forever preferred_lft forever
3: enp9s0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc pfifo_fast state DOWN group default qlen 1000
link/ether 00:10:c6:b1:df:31 brd ff:ff:ff:ff:ff:ff
inet 169.254.9.33/16 brd 169.254.255.255 scope link enp9s0:avahi
valid_lft forever preferred_lft forever
4: enp2s0f0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc mq state DOWN group default qlen 1000
link/ether a0:36:9f:bc:c0:5c brd ff:ff:ff:ff:ff:ff
inet 169.254.9.117/16 brd 169.254.255.255 scope link enp2s0f0:avahi
valid_lft forever preferred_lft forever
5: enp2s0f1: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc mq state DOWN group default qlen 1000
link/ether a0:36:9f:bc:c0:5e brd ff:ff:ff:ff:ff:ff
inet 192.168.0.1/24 brd 192.168.0.255 scope global enp2s0f1
valid_lft forever preferred_lft forever
ubuntu@myCPU:/var/cache/bind$ ip address
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
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: eno1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
link/ether 00:10:c6:b1:df:30 brd ff:ff:ff:ff:ff:ff
inet 10.10.6.148/24 brd 10.10.6.255 scope global eno1
valid_lft forever preferred_lft forever
inet6 fe80::210:c6ff:feb1:df30/64 scope link
valid_lft forever preferred_lft forever
3: enp9s0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc pfifo_fast state DOWN group default qlen 1000
link/ether 00:10:c6:b1:df:31 brd ff:ff:ff:ff:ff:ff
inet 169.254.9.33/16 brd 169.254.255.255 scope link enp9s0:avahi
valid_lft forever preferred_lft forever
4: enp2s0f0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc mq state DOWN group default qlen 1000
link/ether a0:36:9f:bc:c0:5c brd ff:ff:ff:ff:ff:ff
inet 169.254.9.117/16 brd 169.254.255.255 scope link enp2s0f0:avahi
valid_lft forever preferred_lft forever
5: enp2s0f1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP group default qlen 1000
link/ether a0:36:9f:bc:c0:5e brd ff:ff:ff:ff:ff:ff
inet 192.168.0.1/24 brd 192.168.0.255 scope global enp2s0f1
valid_lft forever preferred_lft forever
inet6 fe80::a236:9fff:febc:c05e/64 scope link
valid_lft forever preferred_lft forever
ubuntu@myCPU:/var/cache/bind$ ^C
ubuntu@myCPU:/var/cache/bind$