Connect to Wifi internet linux

echo 127.0.0.1    laptop > /etc/hosts
echo pcname > /etc/hostname

Connect to WIFI

sudo systemctl enable iwd

Enable dhcp client

/etc/iwd/main.conf

[General]

EnableNetworkConfiguration=true

[Rank]

BandModifier5Ghz=100.0

DNS

Either use resolv.conf for a static dns or enable systemd-resolved

/etc/resolv.conf

nameserver 4.4.4.4

nameserver 8.8.8.8

# google public dns

/etc/runit/sv/iwd/run

#!/bin/sh

exec /lib/iwd/iwd 2>/dev/null

ln -s /etc/runit/sv/iwd /run/runit/iwd

Connect to AP

rfkill 

rfkill unblock all

* if it is powered off - press FN+Wifi or Fn+Airplane Mode twice

iwctl device list

iwctl station wlan0 scan

iwctl station wlan0 get-networks

iwctl station wlan0 connect NETWORK_NAME

iwctl station wlan0 disconnect

iwctl station wlan0 show

iwctl known-networks list

iwctl known-networks NETWORK_NAME forget

ifconfig - temporary settings in kernel, not persistent at reboot

ifup/down - config /etc/network/interfaces

Don't install networkmanager 
If you do, sudo systemctl disable NetworkManager-wait-online
Systemd - waits for - multi-user environments - for the network to connect and then continues to load services and you get a long wait at boot.

===========================

ip a

dhclient -v eth0

route

ping

netstat -tapn

namp

iptables -L (INPUT - FORWARD - OUTPUT)

wpa_supplicant

wpa_password wifi_network password > wifi

ip a
rfkill -- check it is enabled

wpa_supplicant -B -i wlan0 -c ./wifi

sudo dhclient wlan0

wpa_supplicant -B -i wlan0 -c <(wpa_passphrase "Your_SSID" Your_passphrase) && dhclient wlan0

Link service to runit by 

# ln -s /etc/sv/wpa_supplicant /var/service

or systemctl enable wap_supplicant