cgi scripts

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…retrieves is static, which means it exists in a constant state: a text file that doesn't change. A CGI program, on the other hand, is executed in real-time, so that it can output dynamic information.  You have to tell the server what permissions to give your script. This establishes who can read, write (that is, change), or execute the file. You accomplish this by telnetting to your server and using the chmod (change mode) command.