logread | grep tor
Thu May 10 19:30:15 2018 kern.info kernel: [ 5.190000] usbcore: registered new interface driver usb-storage
Thu May 10 19:31:13 2018 user.emerg syslog: chown: unknown user/group tor:tor
Thu May 10 19:31:13 2018 user.emerg syslog: chown: unknown user/group tor:tor
Thu May 10 19:31:13 2018 user.emerg syslog: chown: unknown user/group tor:tor