How to Show Available WiFi Networks on Linux from the Command Line(linuxuprising.com)

  iwlist wlan0 scan | awk -F: '
  BEGIN {
    printf "%-40s | %3s | %5s | %4s\n", "SSID", "Enc", "Qual", "Chan"
  }
  function print_network() {
    printf "%-40s | %3s | %5s | %4s\n", essid, key, quality, channel
  }
  /^[[:space:]]*Cell [0-9]+/ { if (key) { print_network() } }
  /^[[:space:]]*Channel:/ { channel=$2 }
  /^[[:space:]]*Encryption key:/ { key=$2 }
  /^[[:space:]]*ESSID:/ { essid=$2 }
  /^[[:space:]]*Quality=/ {
    match($0, /[0-9]+\/[0-9]+/)
    quality=substr($0, RSTART, RLENGTH)
  }
  END { print_network() }'

    nmcli c my-wifi up