WIFI scan command linux

iwlist scan

#Option 1
sudo iwlist wlan0 scan | grep -oE '(ESSID:|Quality=).*'

#Option 2
Create a bash file to filter command iwlist

#!/bin/bash

## print header lines
echo ""
echo "ESSID            QUALITY"

while IFS= read -r line; do

    ## test line contenst and parse as required
 [[ "$line" =~ Quality ]] && {
        qual=${line##*ity=}
        qual=${qual%% *}
        lvl=${line##*evel=}
        lvl=${lvl%% *}
    }
 [[ "$line" =~ ESSID ]] && {
        essid=${line##*ID:}
        echo " $essid   $qual"  # output after ESSID
    }

done

#command execute -> sudo iwlist wlan0 scan | bash parseiwl.sh