interesting
    /lib/bridge-utils/ifupdown.sh

ip
    l[ink]
        l[ist]
            show links (with mac addresses)
        d[elete]
            wireless
                https://unix.stackexchange.com/questions/558839/unable-to-delete-virtual-network-interface-on-linux
                    sudo iw dev <dev> del

    a[ddress]
        view ip address[es]
        -4 a
            show ipv4 addresses only
        a[ssign]
            assign address
                ip -4 a add 192.168.1.12 dev eth0
        s[how]
            ip -4 a show dev eth0
            scope
                global
        d[elete]
            https://serverfault.com/questions/486872/remove-ip-with-ip-command-in-linux
            https://www.baeldung.com/linux/remove-ip-interface
                sudo ip a del fe80::250:56ff:fec0:8/64 dev vmnet8

    l[ink]
        l[ist]
            default
        d[elete]
            ???
            sudo ip link delete <bridgename> type bridge
        s[et]
            ip link set $interfacename down

    n[eighbour]
        s[how]
            man ip-neighbour ??? arp-cache

ip netns
    network namespaces (for virt-n)
ip netns add development
    add a new network namespace

ip route
  view the routing table
  note: we can change the metric for each row of this table
ip route del 192.168.2.0/24 dev eth0
    delete the roote
ip route add 192.168.2.0/24 dev eth0 metric 10
    add...

route -n
  view the "Kernel IP routing table"


ls -l /sys/class/net  
    ...
    vmnet1 -> ../../devices/virtual/net/vmnet1
    vmnet8 -> ../../devices/virtual/net/vmnet8
ls -la /sys/devices/virtual/net
    ...
    vmnet1
    vmnet8
ls -la /sys/devices/virtual/net/vmnet1 


sudo nmcli connection show
sudo nmcli connection delete <br-name>

sudo ip a del x.x.x.x/23 vmnet8
sudo ip a del fe80::250:56ff:fec0:8/64 dev vmnet8
sudo ip link set vmnet8 down
    uninstall vmplayer only - helps here