/etc configuration

hostname

A line line corresponding to the hostname.

Example:

ironforge

Do not put the entire FQHN in the hostname file. It should be the short name of the machine and not contain any domain that it is part of.

hosts

A set of {IP} {hostname}. We recommend putting in at least localhost such that 127.0.0.1 will resolve to localhost. Localhost should however not be used instead use ::1 or 127.0.0.1 explicitly.

127.0.0.1 localhost
::1       localhost

protocols

Part of the Ironforge 'etc' bundle.

Mostly a legacy that certain programs like ping requires.

See: https://www.iana.org/assignments/protocol-numbers/protocol-numbers.txt

sysctl.conf

Used by sysctl -p to initialize system configuration flags.

Example file:

net.ipv4.ip_forward = 1