reboot also without systemd

Signed-off-by: Christian Goll <cgoll@suse.com>

CHANGELOG.md

@@ -82,6 +82,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
   when reading in the configurations
 - Write log messages to stderr rather than stdout. #768
 
+- realy reboot also without systemd
+
 ## [4.4.0] 2023-01-18
 
 ### Added

overlays/wwinit/init

@@ -11,7 +11,7 @@ if test -f "/warewulf/config"; then
 else
     echo "ERROR: Warewulf configuration file not found... rebooting in 1 minute"
     sleep 60
-    /sbin/reboot
+    echo b > /proc/sysrq-trigger || /sbin/reboot
 fi
 
 echo "Warewulf v4 is now booting: $WWHOSTNAME"
@@ -53,4 +53,4 @@ fi
 echo
 echo "There was a problem with the provisioning process, rebooting in 1 minute..."
 sleep 60
-/sbin/reboot
+echo b > /proc/sysrq-trigger || /sbin/reboot