How to read a file into a variable?

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fastmail

fastmail(1)						      General Commands Manual						       fastmail(1)

NAME

       fastmail - quick batch mail interface

SYNOPSIS

       bcc-list] cc-list] comments] from-name]
	      from-addr] in-reply-to] reply-to] references]
	      subject] filename address-list

DESCRIPTION

       The  command  is a simple interface to the mail system that allows you to send a message without the overhead of an interactive mailer.	It
       is particularly efficient in batch-processing mail to very large groups of people.

       All addresses should be full e-mail addresses, aliases in the file, or local login names.

   Options
       recognizes the following options:

	      Include a      header entry.  Send blind carbon copies to the comma-separated list of addresses in bcc-list.

	      Include a      header entry.  Send carbon copies to the comma-separated list of addresses in cc-list.

	      Include a      header entry with the string value comments.

	      Debug.	     Display information on processing steps.

	      Replace the user name in the
			     header entry with from-name.

			     If the user is and the user name is then the default line is:

			     The option changes it to:

	      Replace the address in the
			     header entry with from-addr.  In the example above, changes the original entry to

	      Include the    header entry with the string value in-reply-to.  This is usually used to identify a message that you are replying to.

	      Include the    header entry with the single address given in replyto.  This is the address  where  replies  will	usually  be  sent,
			     instead of to the address given in the header entry, very common with mailing lists.

	      Include a      header entry containing the string value references.

	      Include a      header entry containing the value subject.  If this option is omitted, the message is sent without a subject entry.

   Operands
       recognizes the following operands:

	      address-list   A	list of one or more blank-separated addresses for the header line.  These are the principal recipients of the mes-
			     sage.

	      filename	     Either the name of a file containing the message, or a dash to read from standard input.

EXAMPLES

   A Fully Specified Command
       This command has every option specified.

       The online execution displays the following debug messages:

       The received message has the following relevant header entries:

       The header entry is not transmitted.

   A Batch Process
       Suppose you are user on machine and you have a shell script named that contains the following lines:

       The command:

       would mail a copy of the file to and staggered ten seconds apart.

       would also silently receive a copy of the first message in the mail.  Each resultant message would include the header lines:

FILES

       aliases file.
       Mail transport agent.
       Temporary file.

AUTHOR

       was developed by HP.

SEE ALSO

       elm(1), sendmail(1M).

       RFC 822	 "Standard for the Format of Internet Text Messages"

																       fastmail(1)

UNIX for Dummies Questions & Answers