Create your netplan file

vi /etc/netplan/01-netcfg.yaml

network:

    version: 2

    renderer: networkd

    ethernets:

       ens3:

           dhcp4: no

           addresses: [192.50.1.157/24]

           gateway4: 192.50.1.1

           nameservers:

              addresses: [8.8.4.4,8.8.8.8]

Check our file to see if it is correct:

sudo netplan try

if you have an error in the file it will tell you.

Eg. formatting is important if you have the below you will get an error because all of the options under ens3n

/etc/netplan/01-netcfg.yaml:9:13: Error in network definition: expected mapping (check indentation)
       ens3:
            ^

Notice that under ens3 below that there is no indentation of dhcp4, addresses etc.. and that is incorrect (whereas the old interfaces file didn't care)

network:

    version: 2

    renderer: networkd

    ethernets:

       ens3:

       dhcp4: no

       addresses: [192.50.1.157/24]

       gateway4: 192.50.1.1

       nameservers:

          addresses: [8.8.4.4,8.8.8.8]

apply the new plan once try above succeeds (it means it will apply the network settings in the yaml file you created)

sudo netplan apply

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