There are several key files that should be maintained on a linux
system if you plan to make use of the OS's networking capabilities,
especially if you are running the AX25 Utilities which depend heavily on
system files.
Below you will find a few of the most basic files that support, and may
simplify, the everyday transactions over the net, particularly when you are
setting up routes in the routing table or configuring their associated
devices.
(Courtesy KBNorton Computer Services)