How to check if you cards supports monitor mode

Question

How can I check if my wireless card supports monitor mode, e.g. for use with aircrack-ng?

I know there is a command that shows something like wifi adapters attributes or something, but I can't remember.

Answer 1

You can use the iw command to get a full list of all capabilities of a physical wireless card:

$ iw list
Wiphy phy0
    [...]
    Supported interface modes:
         * IBSS
         * managed
         * AP
         * AP/VLAN
         * monitor
         * P2P-client
         * P2P-GO
         * P2P-device
    [...]

The output of iw list is really long and detailed, therefore I only showed the relevant section. You see monitor is listed as supported interface mode for my example card.