Write a shell scripts that finds total no. of users and finds out how many of them are currently loggedin

Code for Write a shell scripts that finds total no. of users and finds out how many of them are currently loggedin in Unix / Linux / Ubuntu

total=`cat /etc/passwd | wc -l`
cur_log=`who | wc -l`

echo "Total users      : $total"
echo "Currently logged : $cur_log"