How to bring wlan0 up without connect to any access point?

How to bring my wlan0 interface up without connect to any access point using command line?

Note: Ubuntu Server 14.04

3 Answers

ifconfig wlan0 up

That brings the interface up, but it probably won't even have an IP assigned yet.

Based on the article Replacing ifconfig with ip the ip method is:

ip link set dev wlan0 up

if ip a list your device as wlan0.

Remove everything in /etc/NetworkManager/system-connections folder to remove all network profiles and bring up wlan0.

You can do

sudo service network manager restart

or

sudo sytemctl restart NetworkManager

On 15.04 and later.