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Ubuntu Unleashed 2014 Edition: Covering 13.10 and 14.04,Ninth Edition by Paul Hudson, Andrew Hudson, Matthew Helmke

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mod_headers

mod_headers is used to manipulate the HTTP headers of your server’s responses. You can replace, add, merge, or delete headers as you see fit. The module supplies a Header directive for this. Ordering of the Header directive is important. A set followed by an unset for the same HTTP header removes the header altogether. You can place Header directives almost anywhere within your configuration files. These directives are processed in the following order:

1. Core server

2. Virtual host

3. <Directory> and .htaccess files

<Location><Files>

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