Sorry I forgot to tell you that when the output is too long it gets cut off the screen, so if you wrote the line to disable ipv6 on top of the file it wont show, since you are taking pictures and not sending screenshots, it would be easier to just run the command:
sudo nano /etc/sysctl.conf
and take a picture of the screen and it should show me the top of the file and what you wrote because this picture is only showing the end of the file.
Regarding the IP stuff, I am still wondering how you are hard coding the static IP on the Pi since we didn’t go over the /etc/network/interfaces file. Please also take a picture of what the screen shows after typing the command:
sudo nano /etc/network/interfaces
Also, to keep things simple, it would be good to turn OFF predictable network names because eth0 is not the actual name of your interface as you can see from the ifconfig showing “enxb…”
So that you can call the specific interfaces such as eth0 and deal with its configuration properly, you should turn this off, here are the steps and screenshots to follow along, very simple to do:
Type the command:
Select option 2, then N3 (network interfaces), then say No, press enter twice, then press tab until you reach the
<Finish> selection then press enter, and then you should be back in console, a reboot will be necessary, which you already know how to do.
References: https://wiki.debian.org/NetworkConfiguration , http://man7.org/linux/man-pages/man8/sysctl.8.html