who –

Print information about users

who are currently
–dead

print column headings
print name, line, and time
print last clock change
add user’s message

display this help and exit

information not specified
is presumed.

*** Found from the Linux Man Pages
Original text at:
https://man7.org/linux/man-pages/man1/who.1.html
Written by Joseph Arceneaux, David MacKenzie, and Michael Stone.