On Thu, 13 Dec 2018 07:34:12 +0100, Peter Nabbefeld wrote: >Probably I should create the folder to fix the problem. Which owner >and access rights are needed? No, use /usr/lib/sysusers.d/ to declare the user. [root@archlinux rocketmouse]# apropos sysusers.d sysusers.d (5) - Declarative allocation of system users and groups [root@archlinux rocketmouse]# cat /usr/lib/sysusers.d/ceph.conf u ceph 340 - /run/ceph [root@archlinux rocketmouse]# ls -ld /run/ceph/ drwxrwx--- 2 ceph ceph 40 Dec 11 09:21 /run/ceph/