Yrurtj

Is there some command (on Linux) which report the static (and dynamic) information about the network currently connected to? For example, BSSD, encryption method (WPA, or ...), and more. In particular I am wondering if the wifi network created by a hotpot that I borrowed is secured.

Does the following command that I saw from https://askubuntu.com/questions/567006/how-can-i-display-the-list-of-available-wifi-networks#comment1851201_851253 work well?

$ sudo nmcli dev wifi

IN-USE  SSID                   MODE   CHAN  RATE        SIGNAL  BARS  SECURITY 

*       Alcatel LINKZONE 1234  Infra  4     130 Mbit/s  100     ▂▄▆█  WPA2 



$ sudo nmcli dev wifi rescan

$

Why does it only show the currently connected network, not scan all the detectable wifi networks?

I don't understand what iw output means. Do I use it correctly?

$ iw list



Wiphy phy2

    max # scan SSIDs: 4

    max scan IEs length: 2257 bytes

    max # sched scan SSIDs: 0

    max # match sets: 0

    max # scan plans: 1

    max scan plan interval: -1

    max scan plan iterations: 0

    RTS threshold: 2347

    Retry short limit: 7

    Retry long limit: 4

    Coverage class: 0 (up to 0m)

    Device supports RSN-IBSS.

    Supported Ciphers:

        * WEP40 (00-0f-ac:1)

        * WEP104 (00-0f-ac:5)

        * TKIP (00-0f-ac:2)

        * CCMP-128 (00-0f-ac:4)

        * CCMP-256 (00-0f-ac:10)

        * GCMP-128 (00-0f-ac:8)

        * GCMP-256 (00-0f-ac:9)

        * CMAC (00-0f-ac:6)

        * CMAC-256 (00-0f-ac:13)

        * GMAC-128 (00-0f-ac:11)

        * GMAC-256 (00-0f-ac:12)

    Available Antennas: TX 0 RX 0

    Supported interface modes:

         * IBSS

         * managed

         * AP

         * AP/VLAN

         * monitor

         * mesh point

         * P2P-client

         * P2P-GO

    Band 1:

        Capabilities: 0x186e

            HT20/HT40

            SM Power Save disabled

            RX HT20 SGI

            RX HT40 SGI

            No RX STBC

            Max AMSDU length: 7935 bytes

            DSSS/CCK HT40

        Maximum RX AMPDU length 65535 bytes (exponent: 0x003)

        Minimum RX AMPDU time spacing: 16 usec (0x07)

        HT Max RX data rate: 150 Mbps

        HT TX/RX MCS rate indexes supported: 0-7, 32

        Bitrates (non-HT):

            * 1.0 Mbps

            * 2.0 Mbps

            * 5.5 Mbps

            * 11.0 Mbps

            * 6.0 Mbps

            * 9.0 Mbps

            * 12.0 Mbps

            * 18.0 Mbps

            * 24.0 Mbps

            * 36.0 Mbps

            * 48.0 Mbps

            * 54.0 Mbps

        Frequencies:

            * 2412 MHz [1] (20.0 dBm)

            * 2417 MHz [2] (20.0 dBm)

            * 2422 MHz [3] (20.0 dBm)

            * 2427 MHz [4] (20.0 dBm)

            * 2432 MHz [5] (20.0 dBm)

            * 2437 MHz [6] (20.0 dBm)

            * 2442 MHz [7] (20.0 dBm)

            * 2447 MHz [8] (20.0 dBm)

            * 2452 MHz [9] (20.0 dBm)

            * 2457 MHz [10] (20.0 dBm)

            * 2462 MHz [11] (20.0 dBm)

            * 2467 MHz [12] (20.0 dBm)

            * 2472 MHz [13] (20.0 dBm)

            * 2484 MHz [14] (disabled)

    Supported commands:

         * new_interface

         * set_interface

         * new_key

         * start_ap

         * new_station

         * new_mpath

         * set_mesh_config

         * set_bss

         * authenticate

         * associate

         * deauthenticate

         * disassociate

         * join_ibss

         * join_mesh

         * remain_on_channel

         * set_tx_bitrate_mask

         * frame

         * frame_wait_cancel

         * set_wiphy_netns

         * set_channel

         * set_wds_peer

         * probe_client

         * set_noack_map

         * register_beacons

         * start_p2p_device

         * set_mcast_rate

         * connect

         * disconnect

         * set_qos_map

         * set_multicast_to_unicast

    Supported TX frame types:

         * IBSS: 0x00 0x10 0x20 0x30 0x40 0x50 0x60 0x70 0x80 0x90 0xa0 0xb0 0xc0 0xd0 0xe0 0xf0

         * managed: 0x00 0x10 0x20 0x30 0x40 0x50 0x60 0x70 0x80 0x90 0xa0 0xb0 0xc0 0xd0 0xe0 0xf0

         * AP: 0x00 0x10 0x20 0x30 0x40 0x50 0x60 0x70 0x80 0x90 0xa0 0xb0 0xc0 0xd0 0xe0 0xf0

         * AP/VLAN: 0x00 0x10 0x20 0x30 0x40 0x50 0x60 0x70 0x80 0x90 0xa0 0xb0 0xc0 0xd0 0xe0 0xf0

         * mesh point: 0x00 0x10 0x20 0x30 0x40 0x50 0x60 0x70 0x80 0x90 0xa0 0xb0 0xc0 0xd0 0xe0 0xf0

         * P2P-client: 0x00 0x10 0x20 0x30 0x40 0x50 0x60 0x70 0x80 0x90 0xa0 0xb0 0xc0 0xd0 0xe0 0xf0

         * P2P-GO: 0x00 0x10 0x20 0x30 0x40 0x50 0x60 0x70 0x80 0x90 0xa0 0xb0 0xc0 0xd0 0xe0 0xf0

         * P2P-device: 0x00 0x10 0x20 0x30 0x40 0x50 0x60 0x70 0x80 0x90 0xa0 0xb0 0xc0 0xd0 0xe0 0xf0

    Supported RX frame types:

         * IBSS: 0x40 0xb0 0xc0 0xd0

         * managed: 0x40 0xd0

         * AP: 0x00 0x20 0x40 0xa0 0xb0 0xc0 0xd0

         * AP/VLAN: 0x00 0x20 0x40 0xa0 0xb0 0xc0 0xd0

         * mesh point: 0xb0 0xc0 0xd0

         * P2P-client: 0x40 0xd0

         * P2P-GO: 0x00 0x20 0x40 0xa0 0xb0 0xc0 0xd0

         * P2P-device: 0x40 0xd0

    software interface modes (can always be added):

         * AP/VLAN

         * monitor

    interface combinations are not supported

    HT Capability overrides:

         * MCS: ff ff ff ff ff ff ff ff ff ff

         * maximum A-MSDU length

         * supported channel width

         * short GI for 40 MHz

         * max A-MPDU length exponent

         * min MPDU start spacing

    Device supports TX status socket option.

    Device supports HT-IBSS.

    Device supports SAE with AUTHENTICATE command

    Device supports low priority scan.

    Device supports scan flush.

    Device supports AP scan.

    Device supports per-vif TX power setting

    Driver supports full state transitions for AP/GO clients

    Driver supports a userspace MPM

    Device supports configuring vdev MAC-addr on create.

Thanks.