cat >someconfig.conf <<-EOF
first line
second line
--address ${address}
EOF

   Here Documents
       This type of redirection instructs the shell to read input from the current source until a line containing only delimiter (with no trailing blanks) is seen.  All of the lines read up to that point are then used as  the  standard  input  (or
       file descriptor n if n is specified) for a command.

       The format of here-documents is:

              [n]<<[-]word
                      here-document
              delimiter

       No  parameter  and  variable expansion, command substitution, arithmetic expansion, or pathname expansion is performed on word.  If any part of word is quoted, the delimiter is the result of quote removal on word, and the lines in the here-
       document are not expanded.  If word is unquoted, all lines of the here-document are subjected to parameter expansion, command substitution, and arithmetic expansion, the character sequence \<newline> is ignored, and \ must be used to  quote
       the characters \, $, and `.

       If the redirection operator is <<-, then all leading tab characters are stripped from input lines and the line containing delimiter.  This allows here-documents within shell scripts to be indented in a natural fashion.