Problem
1. How do you list the users currently using the system along with a count of the number of times they have logged in?
2. Develop an awk program to summarize from the list of all processes a count of processes run by every user (including root).
3. Write an awk sequence in a shell script which accepts input from the standard input. The program should print the total of any column specified as script argument. For instance, prog1 | awk_prog 3 should print the total of the third column in the output of prog1.