systemd 的 systemd-tmpfiles-clean.service、systemd-tmpfiles-setup-dev.service、systemd-tmpfiles-setup.service 这 3 个服务一直都是 failed，今天只搞定一个。
Service 状态：
$ systemctl status systemd-tmpfiles-clean.service
systemd-tmpfiles-clean.service - Cleanup of Temporary Directories
Loaded: loaded (/usr/lib/systemd/system/systemd-tmpfiles-clean.service; static)
Active: failed (Result: exit-code) since Mon 2014-09-29 09:44:15 CST; 5h 20min ago
Docs: man:tmpfiles.d(5)
man:systemd-tmpfiles(8)
Process: 11988 ExecStart=/usr/bin/systemd-tmpfiles --clean (code=exited, status=1/FAILURE)
Main PID: 11988 (code=exited, status=1/FAILURE)
Sep 29 09:44:15 pc systemd[1]: Starting Cleanup of Temporary Directories...
Sep 29 09:44:15 pc systemd-tmpfiles[11988]: [/usr/lib/tmpfiles.d/xl2tpd.conf:2] Unknown file type 'e'.
Sep 29 09:44:15 pc systemd-tmpfiles[11988]: [/usr/lib/tmpfiles.d/xl2tpd.conf:7] Unknown file type 't'.
Sep 29 09:44:15 pc systemd-tmpfiles[11988]: stat(/run/user/1000/gvfs) failed: Permission denied
Sep 29 09:44:15 pc systemd[1]: systemd-tmpfiles-clean.service: main process exited, code=exited, status=1/FAILURE
Sep 29 09:44:15 pc systemd[1]: Failed to start Cleanup of Temporary Directories.
Sep 29 09:44:15 pc systemd[1]: Unit systemd-tmpfiles-clean.service entered failed state.
挂载信息：
$ mount | grep gvfs
gvfsd-fuse on /run/user/1000/gvfs type fuse.gvfsd-fuse (rw,nosuid,nodev,relatime,user_id=1000,group_id=100)
gvfsd-fuse on /var/run/user/1000/gvfs type fuse.gvfsd-fuse (rw,nosuid,nodev,relatime,user_id=1000,group_id=100)
tmpfiles.d 配置：
$ cat /usr/lib/tmpfiles.d/gvfsd-fuse-tmpfiles.conf
## 省略……
#
# Due to our fuse mount restrictions root can't access nor stat the mountpoint
# resulting in warning spitted out by the systemd-tmpfiles process. Please
# ignore it for the time being until proper solution is found:
# https://bugzilla.gnome.org/show_bug.cgi?id=560658
x /run/user/*/gvfs
/usr/lib/tmpfiles.d/xl2tpd.conf' 这个报错很容易解决，配置文件里注释换行了，新行开头没有加#’ 号，2 行注释合并成一行（Vim 里的操作就是 `Shift-j’）就好了。
gvfs 相关的报错看了 Bug 560658 ，貌似现在还没有解决，这个 Bug 就这样搁置了。
systemd-tmpfiles-setup-dev.service 这个服务看状态和 /dev‘ 有关，肯定和systemd-tmpfiles-clean.service’ 一样纠结，暂时不管了。
systemd-tmpfiles-setup.service 这个报错也是因为 `/usr/lib/tmpfiles.d/xl2tpd.conf’ 这个配置文件，前面的说的注释改掉就好了。
参考：
man systemd-tmpfiles 8
和
man tmpfiles.d 5