Use command instead of shell where possible

evoacme/handlers/main.yml

@@ -2,7 +2,7 @@
   command: newaliases
 
 - name: Test Apache conf
-  shell: apache2ctl -t
+  command: apache2ctl -t
   notify: "Reload Apache conf"
 
 - name: reload apache2

filebeat/tasks/main.yml

@@ -24,7 +24,7 @@
   register: logstash_plugin
 
 - name: is logstash-input-beats installed?
-  shell: grep logstash-input-beats /usr/share/logstash/Gemfile
+  command: grep logstash-input-beats /usr/share/logstash/Gemfile
   check_mode: no
   register: logstash_plugin_installed
   failed_when: false

kvm-host/tasks/ssh.yml

@@ -6,7 +6,7 @@
     ssh_key_bits: 2048
 
 - name: Fetch ssh public keys
-  shell: cat /root/.ssh/id_rsa.pub
+  command: cat /root/.ssh/id_rsa.pub
   register: ssh_keys
   check_mode: no
   changed_when: false