[bug#38720] [PATCH] system: linux-container: Recommend guix container

[Efraim Flashner <efraim@flashner.co.il>]

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I've been using guix containers on foreign systems to bring some Guixy
goodness to the unwashed sysadmins out there. When the container starts
up it displays a message like "Run 'sudo nsenter -a -t 65698' to get a
shell into it." Sometimes when I try to do that I'll get an error
message back about the system's nsenter not knowing about the '-a' flag.
I have found that using a 'guix container' command works well for me.

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Efraim Flashner   <efraim@flashner.co.il>   אפרים פלשנר
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From f2cd59c9eb756e243a5a01e6cd3a6a6e58a02be6 Mon Sep 17 00:00:00 2001
From: Efraim Flashner <efraim@flashner.co.il>
Date: Mon, 23 Dec 2019 16:05:04 +0200
Subject: [PATCH] system: linux-container: Recommend guix container.

* gnu/system/linux-container.scm (container-script)[script]: Recommend
using 'guix container' to get a shell inside the running container.
---
 gnu/system/linux-container.scm | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/gnu/system/linux-container.scm b/gnu/system/linux-container.scm
index 2ab679ff3f..7d9e02b945 100644
--- a/gnu/system/linux-container.scm
+++ b/gnu/system/linux-container.scm
@@ -2,6 +2,7 @@
 ;;; Copyright © 2015 David Thompson <davet@gnu.org>
 ;;; Copyright © 2016, 2017, 2019 Ludovic Courtès <ludo@gnu.org>
 ;;; Copyright © 2019 Arun Isaac <arunisaac@systemreboot.net>
+;;; Copyright © 2019 Efraim Flashner <efraim@flashner.co.il>
 ;;;
 ;;; This file is part of GNU Guix.
 ;;;
@@ -195,9 +196,7 @@ that will be shared with the host system."
               ;; XXX: We can't quite call 'bindtextdomain' so there's actually
               ;; no i18n.
               (info (G_ "system container is running as PID ~a~%") pid)
-              ;; XXX: Should we recommend 'guix container exec'?  It's more
-              ;; verbose and doesn't bring much.
-              (info (G_ "Run 'sudo nsenter -a -t ~a' to get a shell into it.~%")
+              (info (G_ "Run 'sudo guix container exec ~a /run/current-system/profile/bin/bash --login' to get a shell into it.~%")
                     pid)
               (newline (guix-warning-port)))
 
-- 
2.24.1


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