doc: Warn about GPG warning.

* doc/guix.texi (Binary Installation, USB Stick and DVD Installation): Warn
users about the web-of-trust untrusted key warning from GPG.

1 files changed, 9 insertions, 1 deletions

diff --git a/doc/guix.texi b/doc/guix.texi
index ae9ad0739e9..a0e8b0210e8 100644
--- a/doc/guix.texi
+++ b/doc/guix.texi
@@ -28,7 +28,7 @@ Copyright @copyright{} 2014, 2015, 2016 Alex Kost@*
 Copyright @copyright{} 2015, 2016 Mathieu Lirzin@*
 Copyright @copyright{} 2014 Pierre-Antoine Rault@*
 Copyright @copyright{} 2015 Taylan Ulrich Bayırlı/Kammer@*
-Copyright @copyright{} 2015, 2016, 2017 Leo Famulari@*
+Copyright @copyright{} 2015, 2016, 2017, 2019 Leo Famulari@*
 Copyright @copyright{} 2015, 2016, 2017, 2018, 2019 Ricardo Wurmus@*
 Copyright @copyright{} 2016 Ben Woodcroft@*
 Copyright @copyright{} 2016, 2017, 2018 Chris Marusich@*
@@ -560,6 +560,10 @@ $ gpg --keyserver @value{KEY-SERVER} \
 
 @noindent
 and rerun the @code{gpg --verify} command.
+
+Take note that a warning like ``This key is not certified with a trusted
+signature!'' is normal.
+
 @c end authentication part
 
 @item
@@ -1902,6 +1906,10 @@ $ gpg --keyserver @value{KEY-SERVER} \
 
 @noindent
 and rerun the @code{gpg --verify} command.
+
+Take note that a warning like ``This key is not certified with a trusted
+signature!'' is normal.
+
 @c end duplication
 
 This image contains the tools necessary for an installation.