add link to temp mounting in permanent mounting guide

docs/source/programming/Mount-ceph-ubuntu.md

@@ -1,6 +1,9 @@
 # Mount ceph storage on Ubuntu
 In this example, we will **permanently** mount the `neuroinformatics` partition of `ceph`. The same procedure can be used to mount other partitions, such as those belonging to particular labs or projects.
 
+To mount a partition of `ceph` only temporarily, see [Mount ceph storage on Ubuntu temporarily](Mount-ceph-ubuntu-temp.md).
+
+
 The following instructions have been tested on **Ubuntu 20.04 LTS**.
 
 ## Prerequisites