Hello! Recently interested in Unix administration, particularly Debian, FreeBSD. Accordingly, there is a need for good books. At the moment I have only "administrator's Guide to Linux" (evi Nemeth) and "Unix in the original" (Yury Magda). Great book, but still feel the need for something more, not less professional. The most interesting administering networks, working with protocols, firewalls, proxy servers, etc. That can advise Hebraist?