Wlan

Turn off power management

To turn off the wifi adapter's power management run

iwconfig wlan0 power off

Manage wifi with wpa_supplicant and dhcpcd

Create the following basic wpa_supplicant config:

# /etc/wpa_supplicant/wpa_supplicant.conf
ctrl_interface=/run/wpa_supplicant
ctrl_interface_group=wheel
eapol_version=1
ap_scan=1
fast_reauth=1
update_config=1

# Add your networks here.

Then add networks using wpa_passphrase:

wpa_passphrase <SSID> >> /etc/wpa_supplicant/wpa_supplicant.conf

Note that the passphrase can be either supplied as a second argument or read from stdin It will be added to the config in cleartext as a comment, you may want to remove that line.

Finally, install wpa_supplicant and dhcpcd as services, and possibly adjust the wireless interface name in the wpa_supplicant service config.