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[main] / 0001-99-replace-hostname-with-uname-n.patch 

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From b2482a4f7d9a06a9c10a26eb1fb2b855d83e94c7 Mon Sep 17 00:00:00 2001
From: Christian Hesse <mail@eworm.de>
Date: Thu, 4 Aug 2022 12:15:46 +0200
Subject: [PATCH] [!99] replace `hostname` with `uname -n` & `sysctl`

The former belongs to package `inetutils`, which has some security
implications, so let's use `uname` from `coreutils` to get the hostname.

For *setting* the hostname things are more limited. Let's use `sysctl`.
---
 client/scripts/linux | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/client/scripts/linux b/client/scripts/linux
index c4e51f6d..fe4da445 100755
--- a/client/scripts/linux
+++ b/client/scripts/linux
@@ -113,7 +113,7 @@ set_hostname() {
     local current_hostname
 
     if [ -n "$new_host_name" ]; then
-        current_hostname=$(hostname)
+        current_hostname=$(uname -n)
 
         # current host name is empty, '(none)' or 'localhost' or differs from new one from DHCP
         if [ -z "$current_hostname" ] ||
@@ -121,7 +121,7 @@ set_hostname() {
            [ "$current_hostname" = 'localhost' ] ||
            [ "$current_hostname" = "$old_host_name" ]; then
            if [ "$new_host_name" != "$old_host_name" ]; then
-               hostname "$new_host_name"
+               sysctl -w kernel/hostname="$new_host_name"
            fi
         fi
     fi