I have a rpi3 connected to an ethernet cable and via wireless to a router. I believe it may be the cause of terrible connectivity while ssh'ing into my pi3 since it lags horrible on some days, not others etc.
How do I temporarily disable the wifi connection from the terminal in order to determine if its a conflict between both adapters being active at the same time or not?
To turn WiFi off:
sudo rfkill block wifi
To turn WiFi back on:
sudo rfkill unblock wifi
To check the status of your wireless communication interfaces:
sudo rfkill list all
If you aren't worried about actually powering off the WiFi radio, you can probably just bring the WiFi's network interface down - "sudo ifconfig wlan0 down"
Or if you want to disable WiFi at boot, in your /boot/ (or /boot/firmware/ ) "config.txt" file add or uncomment the line "dtoverlay=pi3-disable-wifi" Note that this may be simply "dtoverlay=disable-wifi" in newer configurations.
To reenable wifi, comment out the line with a leading hash (octothorpe) symbol. (a "#")
[ I use 'mcedit' as my preferred editor. Others may use vi, ed, vim, nano, or etc... For guidance on how to edit system configuration files: See other documents. Or RTFM. ]
