-s    Finger displays the user's login name, real name, terminal name and write status (as a ``*'' after
      the terminal name if write permission is denied), idle time, login time, office location and office
      phone number.

      Login time is displayed as month, day, hours and minutes, unless more than six months ago, in which
      case the year is displayed rather than the hours and minutes.

      Unknown devices as well as nonexistent idle and login times are displayed as single asterisks.

-l    Produces a multi-line format displaying all of the information described for the -s option as well as
      the user's home directory, home phone number, login shell, mail status, and the contents of the files
      “.plan”, “.project”, “.pgpkey” and “.forward” from the user's home directory.

      Phone numbers specified as eleven digits are printed as ``+N-NNN-NNN-NNNN''.  Numbers specified as
      ten or seven digits are printed as the appropriate subset of that string.  Numbers specified as five
      digits are printed as ``xN-NNNN''.  Numbers specified as four digits are printed as ``xNNNN''.

      If write permission is denied to the device, the phrase ``(messages off)'' is appended to the line
      containing the device name.  One entry per user is displayed with the -l option; if a user is logged
      on multiple times, terminal information is repeated once per login.

      Mail status is shown as ``No Mail.'' if there is no mail at all, ``Mail last read DDD MMM ## HH:MM
      YYYY (TZ)'' if the person has looked at their mailbox since new mail arriving, or ``New mail received
      ...'', ``  Unread since ...'' if they have new mail.

-p    Prevents the -l option of finger from displaying the contents of the “.plan”, “.project” and
      “.pgpkey” files.

-m    Prevent matching of user names.  User is usually a login name; however, matching will also be done on
      the users' real names, unless the -m option is supplied.  All name matching performed by finger is
      case insensitive.