Figure 2: More options for who

$ who -p /etc/wtmp
getty           .       Apr 11 20:09
getty      w1           May 15 20:11
getty      w1           May 16 10:44
getty      w1           May 16 12:01
getty      w1           May 16 12:05
getty      w1           May 28 22:43
getty      w1           Jun  3 23:51
getty      w1           Jun  5 17:10

$ who -l /etc/wtmp
LOGIN      window       Apr 11 20:09  old      71
LOGIN      window       May 15 20:11  old     113
LOGIN      window       May 16 10:44  old     258
LOGIN      window       May 16 12:01  old     289
LOGIN      window       May 16 12:05  old     326
LOGIN      window       May 28 22:43  old    2934
LOGIN      window       Jun  3 23:51  old    4082
LOGIN      window       Jun  5 17:10  old    4587

$ who -u
chare      w1           Jun  5 17:10  3:29   4587