Linux network nightmare

How to configure network

At the beginning there was Redhat, with... I don't remember.

Then, there was interfaces. /etc/network/interfaces . Just one file, good.

To configure static ip address:

auto lo
iface lo inet loopback

auto eth0
iface eth0 inet static
address 10.91.40.20
netmask 255.255.0.0
network 10.91.0.0
gateway 10.91.50.1
broadcast 10.91.255.255

In the new versions, this must be activated, unactivating eth0 for NetworkManager. In /etc/NetworkManager/NetworkManager.conf, set:

[main]
plugins=ifupdown,keyfile

[ifupdown]
managed=false

[device]
wifi.scan-rand-mac-address=no

and then edit interfaces.

Test it with a reboot!

Wi-Fi

For testing, if NetworkManager is enabled, you can use nmcli (and comment eth0 in interfaces):

nmcli device wifi connect Benediktinai password Daukanto21

It won't restart at boot!

Test

ping www.google.com

(it's reachable by now, 18/12/2021).