</listitem>
</varlistentry>
+ <varlistentry>
+ <term><varname>INVOCATION_ID=</varname></term>
+ <term><varname>USER_INVOCATION_ID=</varname></term>
+ <listitem>
+ <para>A randomized, unique 128-bit ID identifying each runtime cycle of the unit. This is different from
+ <varname>_SYSTEMD_INVOCATION_ID</varname> in that it is only used for messages coming from systemd code
+ (e.g. logs from the system/user manager or from forked processes performing systemd-related setup).</para>
+ </listitem>
+ </varlistentry>
+
<varlistentry>
<term><varname>SYSLOG_FACILITY=</varname></term>
<term><varname>SYSLOG_IDENTIFIER=</varname></term>