diff --git a/rbenv/tasks/main.yml b/rbenv/tasks/main.yml
index 04eab19b..7b680e83 100644
--- a/rbenv/tasks/main.yml
+++ b/rbenv/tasks/main.yml
@@ -62,22 +62,30 @@
 
   - name: is Ruby {{ rbenv_ruby_version }} available for {{ username }} ?
     shell: /bin/bash -lc "rbenv versions | grep {{ rbenv_ruby_version }}"
+    args:
+      warn: no
     failed_when: False
     changed_when: False
     register: ruby_installed
 
   - name: Ruby {{ rbenv_ruby_version }} is available for {{ username }} (be patient... could be long)
     shell: /bin/bash -lc "TMPDIR=~/tmp rbenv install {{ rbenv_ruby_version }}"
+    args:
+      warn: no
     when: ruby_installed.rc != 0
 
   - name: is Ruby {{ rbenv_ruby_version }} selected for {{ username }} ?
     shell: /bin/bash -lc "rbenv version | cut -d ' ' -f 1 | grep -Fx '{{ rbenv_ruby_version }}'"
+    args:
+      warn: no
     register: ruby_selected
     changed_when: False
     failed_when: False
 
   - name: select Ruby {{ rbenv_ruby_version }} for {{ username }}
     shell: /bin/bash -lc "rbenv global {{ rbenv_ruby_version }} && rbenv rehash"
+    args:
+      warn: no
     when: ruby_selected.rc != 0
 
   become_user: "{{ username }}"
diff --git a/tomcat-instance/tasks/check.yml b/tomcat-instance/tasks/check.yml
index 0b615315..996a0773 100644
--- a/tomcat-instance/tasks/check.yml
+++ b/tomcat-instance/tasks/check.yml
@@ -3,24 +3,24 @@
   debug:
     msg: "{{ tomcat_instance_name }}"
 
-- name: Check use of gid 
-  shell: id -ng "{{ tomcat_instance_port }}"
+- name: Check use of gid
+  command: id -ng "{{ tomcat_instance_port }}"
   register: check_port_gid
   changed_when: false
   failed_when:
     - check_port_gid|success
     - check_port_gid.stdout != "{{ tomcat_instance_name }}"
 
-- name: Check use of uid 
-  shell: id -nu "{{ tomcat_instance_port }}"
+- name: Check use of uid
+  command: id -nu "{{ tomcat_instance_port }}"
   register: check_port_uid
   changed_when: false
   failed_when:
     - check_port_uid|success
     - check_port_uid.stdout != "{{ tomcat_instance_name }}"
 
-#- name: Check use of http port 
-#  shell: grep '<Connector port="{{ tomcat_instance_port }}" protocol="HTTP/1.1"' $(ls {{ tomcat_instance_root }}/*/conf/server.xml|grep -v {{ tomcat_instance_name }})
+#- name: Check use of http port
+#  command: grep '<Connector port="{{ tomcat_instance_port }}" protocol="HTTP/1.1"' $(ls {{ tomcat_instance_root }}/*/conf/server.xml|grep -v {{ tomcat_instance_name }})
 
 - name: Set shutdown port (default=http port + 1)
   set_fact: