Normalize the path of the etc directory in EL.

tasks/r-installation-el.yml

@@ -3,6 +3,12 @@
   - name: Install the R base packages.
     yum: pkg={{ r_base_packages_el }} state={{ r_packages_main_state }}
 
+  - name: Link to the R etc directory
+    file:
+      src: '/usr/lib64/R/etc'
+      dest: '/etc/R'
+      state: link
+
   - name: Install the R base development packages.
     yum: pkg={{ r_base_packages_dev_el }} state={{ r_packages_main_state }}
     when: r_el_dev_pkgs