Hello, I had a glance at https://www.freebsd.org/releases/10.3R/installation.html. I believe this line is missing a couple of links: "The procedure for doing a source code based update is described in and ." My guess is that that line should be: "The procedure for doing a source code based update is described in Synchronizing Source <https://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/synching.html> and Rebuilding world <https://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/makeworld.html> ." Thanks.