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-rw-r--r--doc/guix.texi17
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diff --git a/doc/guix.texi b/doc/guix.texi
index 8a6640124c..3278aeb7d6 100644
--- a/doc/guix.texi
+++ b/doc/guix.texi
@@ -43258,6 +43258,23 @@ This command also installs bootloader on the targets specified in
@file{my-os-config}, unless the @option{--no-bootloader} option was
passed.
+@item installer
+Run the installer. Usually the installer is built as an @file{iso}
+image, copied to a USB Stick or DVD, and booted from (@ref{USB Stick and
+DVD Installation}). If your machine already runs Guix and you still
+want to run the installer, e.g., for testing purposes, you can skip the
+step of creating an @file{iso} and run for instance:
+
+@example
+guix system installer --dry-run
+@end example
+
+@quotation Note
+If you do not use @option{--dry-run} then you need to run as root. Be
+@emph{very careful} when running the installer as root, it can cause
+data loss or render your system unbootable!
+@end quotation
+
@item vm
@cindex virtual machine
@cindex VM