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-rw-r--r--man/systemd.special.xml8
1 files changed, 8 insertions, 0 deletions
diff --git a/man/systemd.special.xml b/man/systemd.special.xml
index b77b60d920..b7340ed978 100644
--- a/man/systemd.special.xml
+++ b/man/systemd.special.xml
@@ -811,6 +811,14 @@
(via a <varname>Wants=</varname> type
dependency).</para>
+ <para>Note that these passive units cannot be started
+ manually, i.e. <literal>systemctl start
+ time-sync.target</literal> will fail with an
+ error. They can only be pulled in by dependency. This
+ is enforced since they exist for ordering purposes
+ only and thus are not useful as only unit within a
+ transaction.</para>
+
<variablelist>
<varlistentry>
<term><filename>local-fs-pre.target</filename></term>