+
+ <para>System services (<filename>systemd-tmpfiles-setup.service</filename>,
+ <filename>systemd-tmpfiles-setup-dev.service</filename>,
+ <filename>systemd-tmpfiles-clean.service</filename>) invoke <command>systemd-tmpfiles</command> to create
+ system files and to perform system wide cleanup. Those services read administrator-controlled
+ configuration files in <filename>tmpfiles.d/</filename> directories. User services
+ (<filename>systemd-tmpfiles-setup.service</filename>,
+ <filename>systemd-tmpfiles-clean.service</filename>) also invoke <command>systemd-tmpfiles</command>, but
+ it reads a separate set of files, which includes user-controlled files under
+ <filename>~/.config/user-tmpfiles.d/</filename> and <filename>~/.local/share/user-tmpfiles.d/</filename>,
+ and administrator-controller files under <filename>/usr/share/user-tmpfiles.d/</filename>. Users may use
+ this to create and clean up files under their control, but the system instance performs global cleanup
+ and is not influenced by user configuration. Note that this means a time-based cleanup configured in the
+ system instance, such as the one typically configured for <filename>/tmp</filename>, will thus also
+ affect files created by the user instance if they are placed in <filename>/tmp</filename>, even if the
+ user instance's time-based cleanup is turned off.</para>