What is supersede in a DHCP config?

Question

E.g.: what does

supersede domain-name "SOMETHING.COM FOO.ORG";

exactly mean?

Answer 1

In English, supersede means (from OED)

To take the place of (something set aside or abandoned); to succeed to the place occupied by; to serve, be adopted or accepted instead of.

From man dhclient.conf

The supersede statement

   supersede [ option declaration ] ;

 If  for  some  option the client should always use a locally-configured
 value or values rather than whatever is supplied by the  server,  these
 values can be defined in the supersede statement.

So, for instance, you could write:

supersede host-name "myCoolName";