mjhjmtu

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.