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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.