Get nginx users per day

get.sh

cat nginx_logs.txt // (docker logs with timestamps, so first col ($1) is time)
  | tr -cd '\11\12\15\40-\176'  // filter non ascii from bot requests
  | grep "/202"   // get rows with time like Apr/2021 or Jul/2020
  | grep 'qp.png' // get rows which will called once per real user
  | awk '{split($5,a,":"); print a[1] "\t" $2}' // print time of day and ip
  | uniq -c  
  | sort -rn 
  | awk '{arr[$2]+=1} END {for (i in arr) {print substr(i,2),arr[i]}}' // Group IPs per day

awk '{arr[$2]+=$1} for adding same ip more than once, or awk '{arr[$2]+=1} (add 1) per ip in the same day