--- /dev/null
+# we can use CEPH_CONF to override the normal configuration file location.
+ $ env CEPH_CONF=from-env ceph-conf -s foo bar
+ .* \-1 did not load config file, using default settings. (re)
+ .* \-1 Errors while parsing config file! (re)
+ .* \-1 parse_file: cannot open from-env: \(2\) No such file or directory (re)
+ .* \-1 Errors while parsing config file! (re)
+ .* \-1 parse_file: cannot open from-env: \(2\) No such file or directory (re)
+ [1]
+
+# command-line arguments should override environment
+ $ env -u CEPH_CONF ceph-conf -c from-args
+ global_init: unable to open config file from search list from-args
+ [1]
+