I have a wifi adapter that shows up when I type

Code:
ip link show wlan0
As you can see here

Code:
3: wlan0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc mq state DOWN mode DEFAULT group default qlen 1000
    link/ether 26:12:4e:8d:eb:9f brd ff:ff:ff:ff:ff:ff
If I run
Code:
iw wlan0 scan
I see a list of available WiFi networks. When I type
Code:
ip link set wlan0 up
it will not change the state from DOWN to UP.

How can I enable this Wifi Adapter through the command line? (I only have terminal access at this moment)