7.3. When I run the rc.firewall command, I get "command not found" errors. Why?

How did you put the rc.firewall onto your machine? Did you cut&paste it into a TELNET window, FTP it from a Windows/DOS machine, etc? Try this.. log into your Linux box and run "vim -b /etc/rc.d/rc.firewall" and see if all your lines end in a ^M. If they do, delete all the ^M and try again.