doc: Explicitly state mount.ceph two first arguments are fixed.

I've hurt myself too many times with this.

Signed-off-by: Tommi Virtanen <tv@inktank.com>

diff --git a/doc/man/8/mount.ceph.rst b/doc/man/8/mount.ceph.rst
index 2bd287e68893758ad29e11988f9c8a7d2e93dd12..774ad91007b32297addc47795f5b3d56819a01a7 100644 (file)
--- a/doc/man/8/mount.ceph.rst
+++ b/doc/man/8/mount.ceph.rst
@@ -35,6 +35,10 @@ the time of mount.
 A subdirectory subdir may be specified if a subset of the file system
 is to be mounted.
 
+Mount helper application conventions dictate that the first two
+options are device to be mounted and destination path. Options must be
+passed only after these fixed arguments.
+
 
 Options
 =======