The next question deal with the file last_log. Take a look at it if you like, it is just the output of a command called last. It is in that same directory as before, and you can use it there or copy it if you like.

12. Using this method we can sort these, get the unique names, then sort again but based on the IP address. (You can just use "k 2" even though this will sort the IP addresses by alphabetic order.) This will allow us to determine which individuals are logging in from the same address. There are six pairs of people that log in from the same IP address. Please show me your command to find out any pair of users that log in from the same IP address and list them