mail -- send mail to another user
mail [ letter person ... ]
mail without an argument searches for a file calledmailbox, prints it if present, asks if it should be saved.
|If the answer is y , the mail is renamed mail, otherwiseit is deleted. The answer to the above question may be supplied in the letter argument. When followed by the names of a letter and one or morepeople, the letter is appended to each person's mailbox. Each letter is preceded by the sender's name and apostmark.
|A person is either the name of an entry in the directory/usr, in which case the mail is sent to /usr/person/mailbox, or the path name of a directory, inwhich case mailbox in that directory is used.
|When a user logs in he is informed of the presence of mail.
/etc/uids to map the sender's numerical user ID to name;mail and mailbox in various directories.
"Who are you?" if the user cannot be identified for somereason (a bug). "Cannot send to user" if mailbox cannot be