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-rw-r--r--man/systemd.exec.xml5
1 files changed, 5 insertions, 0 deletions
diff --git a/man/systemd.exec.xml b/man/systemd.exec.xml
index 5c043497bb..d6f1427dcc 100644
--- a/man/systemd.exec.xml
+++ b/man/systemd.exec.xml
@@ -759,6 +759,11 @@ CapabilityBoundingSet=~CAP_B CAP_C</programlisting>
<varname>RestrictRealtime=</varname> has no effect on systems that lack support for SECCOMP system call filtering,
or in containers where support for this is turned off.</para>
+ <para>Also note that some sandboxing functionality is generally not available in user services (i.e. services run
+ by the per-user service manager). Specifically, the various settings requiring file system namespacing support
+ (such as <varname>ProtectSystem=</varname>) are not available, as the underlying kernel functionality is only
+ accessible to privileged processes.</para>
+
<variablelist>
<varlistentry>