term% ls -F
term% pwd
term% cat index.txt
MAIL(1)                     General Commands Manual                    MAIL(1)

       mail  -  send or receive mail among users

       mail person ...
       mail [ -r ] [ -q ] [ -p ] [ -f file ]

       Mail  with  no  argument  prints  a user's mail, message-by-message, in
       last-in, first-out order; the optional  argument  -r  causes  first-in,
       first-out  order.  If the -p flag is given, the mail is printed with no
       questions asked; otherwise, for each message, mail reads  a  line  from
       the standard input to direct disposition of the message.

              Go on to next message.

       d      Delete message and go on to the next.

       p      Print message again.

       -      Go back to previous message.

       s [ file ] ...
              Save the message in the named files (`mbox' default).

       w [ file ] ...
              Save  the  message, without a header, in the named files (`mbox'

       m [ person ] ...
              Mail the message to the named persons (yourself is default).

       EOT (control-D)
              Put unexamined mail back in the mailbox and stop.

       q      Same as EOT.

       x      Exit, without changing the mailbox file.

              Escape to the Shell to do command.

       ?      Print a command summary.

       An interrupt stops the printing of the current  letter.   The  optional
       argument  −q  causes mail to exit after interrupts without changing the

       When persons are named, mail takes the standard input up to an  end-of-
       file  (or  a  line  with just `.')  and adds it to each person's `mail'
       file.  The message is preceded by the sender's  name  and  a  postmark.
       Lines  that  look  like  postmarks are prepended with `>'.  A person is
       usually a user name recognized by login(1).  To denote a recipient on a
       remote  system,  prefix  person by the system name and exclamation mark
       (see uucp(1)).

       The -f option causes the named file, e.g. `mbox', to be printed  as  if
       it were the mail file.

       Each  user owns his own mailbox, which is by default generally readable
       but not writable.  The command does not delete  an  empty  mailbox  nor
       change its mode, so a user may make it unreadable if desired.

       When a user logs in he is informed of the presence of mail.

       /usr/spool/mail/*   mailboxes
       /etc/passwd    to identify sender and locate persons
       mbox      saved mail
       /tmp/ma*  temp file
       dead.letter    unmailable text

       xsend(1), write(1), uucp(1)

       There  is  a locking mechanism intended to prevent two senders from ac‐
       cessing the same mailbox, but it is not perfect and races are possible.