Minor edits to suggestion on using shared memory

The edits help it be more clear, and remind the reader to delete any
remaining file in the RAM in the end.

1 files changed, 9 insertions, 3 deletions

diff --git a/README-hacking.md b/README-hacking.md
index 9ecda33..c5415cd 100644
--- a/README-hacking.md
+++ b/README-hacking.md
@@ -971,8 +971,10 @@ for the benefit of others.
                 aststatistics $$input.fits --mean --std > $@
                 rm $$input.fits $$input
         ```
-      The important point here is that the template has no suffix. So you
-      can add the suffix corresponding to your desired format. But more
+
+      The important point here is that the temporary name template
+      (`shm-template`) has no suffix. So you can add the suffix
+      corresponding to your desired format afterwards. But more
       importantly, when `mktemp` sets the random name, it also checks if no
       file exists with that name and creates a file with that exact name at
       that moment. So at the end of each recipe above, you'll have two
@@ -987,7 +989,11 @@ for the benefit of others.
       time between deleting two files of a single `rm` command). When using
       this template, you can put the definition of `shm-template` in
       `reproduce/analysis/make/initialize.mk` to be usable in all the
-      different Makefiles of your analysis.
+      different Makefiles of your analysis. *Finally, BE RESPONSIBLE: *
+      after you are finished, be sure to clean up any possibly remaining
+      files (due to crashes in the processing while you are working),
+      otherwise your RAM may fill up very fast. You can do it easily with a
+      command like this: `rm -f /dev/shm/$(shell whoami)-*`.
 
 
  - **Software tarballs and raw inputs**: It is critically important to