These appendixes provide a number of useful checklists and referances.
Appendix A, UNIX Security Checklist, contains a point-by-point list of many of the suggestions made in the text of the book.
Appendix B, Important Files, is a list of the important files in the UNIX filesystem, and a brief discussion of their security implications.
Appendix C, UNIX Processes, is a technical discussion of how the UNIX system manages processes. It also describes some of the special attributes of processes, including the UID, GID, and SUID.
Appendix D, Paper Sources, list books, article, and magazines about computer security.
Appendix E, Electronic Resources, is a brif listing of some significant security tools to use with UNIX, including directions on where to find them on the Internet.
Appendix F, Organizations, contains the names, telephone numbers, and addresses of organizations that are devoted to seeing computers become more secure.
Appendix G, Table of IP Services, lists the common TCP/IP protocols, along with their port numbers and suggested handling by a firewall.