The following conventions are used in this document when it comes to commands, files and other specific information.
Code excerpts and command-outputs are printed like this, with all output in fixed width font and user-written commands in bold typeface:
[blueflux@work1 neigh]$ ls default eth0 lo [blueflux@work1 neigh]$
All commands and program names in the tutorial are shown in bold typeface.
All system items such as hardware, and also kernel internals or abstract system items such as the loopback interface are all shown in an italic typeface.
computer output is formatted in this way in the text.
filenames and paths in the file-system are shown like /usr/local/bin/iptables.