Hi,
My bad, shell for debian-tor is set to /bin/false and so it prevents any command from running. Setting shell should "fix" this:
su debian-tor -s /bin/sh -c "tor --verify-config"
-- Ivan Markin
thank you for your hint, that solved it. :-) Now I`ve got this beautiful non error output:
# su debian-tor -s /bin/sh -c "tor --verify-config" Dec 21 14:10:43.078 [notice] Tor 0.2.9.8 (git-a0df013ea241b026) running on Linux with Libevent 2.0.21-stable, OpenSSL 1.0.1t and Zlib 1.2.8. Dec 21 14:10:43.078 [notice] Tor can't help you if you use it wrong! Learn how to be safe at https://www.torproject.org/download/download#warning Dec 21 14:10:43.078 [notice] Read configuration file "/etc/tor/torrc". Configuration was valid
Cheers, Patrice