not set, a suitable default for the default system D-Bus instance
will be used.</para>
- <para><function>sd_bus_open_system_remote()</function> connects to
- the system bus on the specified <parameter>host</parameter> using
- <citerefentry
- project='die-net'><refentrytitle>ssh</refentrytitle><manvolnum>1</manvolnum></citerefentry>. <parameter>host</parameter>
- consists of an optional user name followed by the
- <literal>@</literal> symbol, and the hostname.
- </para>
+ <para><function>sd_bus_open_system_remote()</function> connects to the system bus on
+ the specified host using
+ <citerefentry project='die-net'><refentrytitle>ssh</refentrytitle><manvolnum>1</manvolnum></citerefentry>.
+ <parameter>host</parameter> consists of an optional user name followed by the
+ <literal>@</literal> symbol, and the hostname, optionally followed by a
+ <literal>:</literal> and a machine name. If the machine name is given, a connection
+ is created to the system bus in the specified container on the remote machine, and
+ otherwise a connection to the system bus on the specified host is created.</para>
+
+ <para>Note that entering a container is a privileged operation, and will likely only
+ work for the root user on the remote machine.</para>
<para><function>sd_bus_open_system_machine()</function> connects
to the system bus in the specified <parameter>machine</parameter>,