From 215c784ff4e48b2196226fc0da4715e05de729d5 Mon Sep 17 00:00:00 2001 From: Thomas Bartelsmeier Date: Mon, 29 Jun 2020 17:07:16 +0200 Subject: [PATCH] hosts.5: Clarify capability for IPv6 outside of examples Resolves https://bugzilla.kernel.org/show_bug.cgi?id=208279 Signed-off-by: Thomas Bartelsmeier Signed-off-by: Michael Kerrisk --- man5/hosts.5 | 3 +++ 1 file changed, 3 insertions(+) diff --git a/man5/hosts.5 b/man5/hosts.5 index cb055f5f6..1230f9303 100644 --- a/man5/hosts.5 +++ b/man5/hosts.5 @@ -42,6 +42,7 @@ line should be present with the following information: IP_address canonical_hostname [aliases...] .RE .PP +The IP address can conform to either IPv4 or IPv6. Fields of the entry are separated by any number of blanks and/or tab characters. Text from a "#" character until the end of the line is @@ -53,6 +54,8 @@ alphabetic character and end with an alphanumeric character. Optional aliases provide for name changes, alternate spellings, shorter hostnames, or generic hostnames (for example, .IR localhost ). +If required, a host may have two separate entries in this file; +one for each version of the Internet Protocol (IPv4 and IPv6). .PP The Berkeley Internet Name Domain (BIND) Server implements the Internet name server for UNIX systems.