Basic Server Side Include Commands

Command	Function
config	Sets the time, size, or error-message format.
echo	Inserts the values of SSI variables into your Web page.
exec	Executes a system command or a CGI program and inserts the output of that command into a Web page.
flastmod	Inserts into your Web page the date of the last time a file was modified.
fsize	Inserts the size of a file into your Web page.
include	Inserts the contents of HTML files into your Web page.