Simple test to avoid service restart if unnecessary

linux_os/guide/system/logging/rsyslog_accepting_remote_messages/rsyslog_nolisten/bash/shared.sh

@@ -10,16 +10,21 @@ rainer_regex='^\s*(module|input)\((load|type)="(imtcp|imudp)".*$'
 readarray -t legacy_targets < <(grep -l -E -r "${legacy_regex[@]}" /etc/rsyslog.conf /etc/rsyslog.d/)
 readarray -t rainer_targets < <(grep -l -E -r "${rainer_regex[@]}" /etc/rsyslog.conf /etc/rsyslog.d/)
 
+config_changed=false
 if [ ${#legacy_targets[@]} -gt 0 ]; then
     for target in "${legacy_targets[@]}"; do
         sed -E -i "/$legacy_regex/ s/^/# /" "$target"
     done
+    config_changed=true
 fi
 
 if [ ${#rainer_targets[@]} -gt 0 ]; then
     for target in "${rainer_targets[@]}"; do
         sed -E -i "/$rainer_regex/ s/^/# /" "$target"
     done
+    config_changed=true
 fi
 
-systemctl restart rsyslog.service
+if $config_changed; then
+    systemctl restart rsyslog.service
+fi