diff --git a/classes/local/cli/clibase.php b/classes/local/cli/clibase.php
index dc96578..a22c096 100644
--- a/classes/local/cli/clibase.php
+++ b/classes/local/cli/clibase.php
@@ -147,5 +147,6 @@ abstract class clibase {
             $long = '--'.$long;
             printf("  %-4s %-20s %s\n", $short, $long, $text);
         }
+        printf("\n%s\n\n", get_string('cli'.$cliname.'examples', 'auth_outage'));
     }
 }
diff --git a/classes/local/cli/create.php b/classes/local/cli/create.php
index bdd04f5..754bdf9 100644
--- a/classes/local/cli/create.php
+++ b/classes/local/cli/create.php
@@ -200,7 +200,7 @@ class create extends clibase {
     private function clone_defaults() {
         $id = $this->options['clone'];
         if (!is_number($id) || ($id <= 0)) {
-            throw new cli_exception(get_string('clierrorinvalidvalue', 'auth_outage', ['param' => 'clone']),
+            throw new cli_exception(get_string('clierrorinvalidvaluenotid', 'auth_outage', ['param' => 'clone']),
                 cli_exception::ERROR_PARAMETER_INVALID);
         }
 
@@ -245,12 +245,12 @@ class create extends clibase {
      */
     private function merge_options_check_parameters_int_nonnegative($option, $param) {
         if (!is_number($option)) {
-            throw new cli_exception(get_string('clierrorinvalidvalue', 'auth_outage', ['param' => $param]),
+            throw new cli_exception(get_string('clierrorinvalidvaluenotnumber', 'auth_outage', ['param' => $param]),
                 cli_exception::ERROR_PARAMETER_INVALID);
         }
         $option = (int)$option;
         if ($option < 0) {
-            throw new cli_exception(get_string('clierrorinvalidvalue', 'auth_outage', ['param' => $param]),
+            throw new cli_exception(get_string('clierrorinvalidvaluenegativenumber', 'auth_outage', ['param' => $param]),
                 cli_exception::ERROR_PARAMETER_INVALID);
         }
         return $option;
@@ -265,12 +265,12 @@ class create extends clibase {
      */
     private function merge_options_check_parameters_string_nonempty($option, $param) {
         if (!is_string($option)) {
-            throw new cli_exception(get_string('clierrorinvalidvalue', 'auth_outage', ['param' => $param]),
+            throw new cli_exception(get_string('clierrorinvalidvaluenotstring', 'auth_outage', ['param' => $param]),
                 cli_exception::ERROR_PARAMETER_INVALID);
         }
         $option = trim($option);
         if (strlen($option) == 0) {
-            throw new cli_exception(get_string('clierrorinvalidvalue', 'auth_outage', ['param' => $param]),
+            throw new cli_exception(get_string('clierrorinvalidvalueemptystring', 'auth_outage', ['param' => $param]),
                 cli_exception::ERROR_PARAMETER_INVALID);
         }
         return $option;
@@ -298,7 +298,7 @@ class create extends clibase {
             }
         }
 
-        throw new cli_exception(get_string('clierrorinvalidvalue', 'auth_outage', ['param' => $param]),
+        throw new cli_exception(get_string('clierrorinvalidvaluenotbool', 'auth_outage', ['param' => $param]),
             cli_exception::ERROR_PARAMETER_INVALID);
     }
 }
diff --git a/lang/en/auth_outage.php b/lang/en/auth_outage.php
index 289c629..98fc5d1 100644
--- a/lang/en/auth_outage.php
+++ b/lang/en/auth_outage.php
@@ -27,6 +27,7 @@ $string['auth_outagedescription'] = 'Auxiliary plugin that warns users about a f
 $string['autostart'] = 'Auto start maintenance mode.';
 $string['autostart_help'] = 'If selected, when the outage starts it will automatically turn on Moodle maintenance mode.';
 $string['clicreatehelp'] = 'Creates a new outage.';
+$string['clicreateexamples'] = "Create an outage starting in 10 seconds\n\n> php create.php -s=10";
 $string['clicreateparamautostart'] = 'must be Y or N, sets if the outage automatically triggers maintenance mode.';
 $string['clicreateparamblock'] = 'blocks until outage starts.';
 $string['clicreateparamclone'] = 'clone another outage except for the start time.';
@@ -38,6 +39,7 @@ $string['clicreateparamstart'] = 'in how many seconds should this outage start o
 $string['clicreateparamtitle'] = 'the title of the outage.';
 $string['clicreateparamwarn'] = 'how many seconds before it starts to display a warning.';
 $string['clifinishhelp'] = 'Finishes an ongoing outage.';
+$string['clifinishexamples'] = '';
 $string['clifinishnotongoing'] = 'Outage is not ongoing.';
 $string['clifinishparamhelp'] = 'shows parameters help.';
 $string['clifinishparamactive'] = 'finishes the currently active outage.';
@@ -45,6 +47,7 @@ $string['clifinishparamoutageid'] = 'the id of the outage to finish.';
 $string['cliinmaintenancemode'] = 'Moodle maintenance mode is on. Use "php admin/cli/maintenance.php --disable" to disable it before finishing the outage.';
 $string['cliwaitforiterroridxoractive'] = 'You must use --outageid=# or --active parameter but not both.';
 $string['cliwaitforithelp'] = 'Waits until an outage starts.';
+$string['cliwaitforitexamples'] = '';
 $string['cliwaitforitoutagestarted'] = 'Outage started!';
 $string['cliwaitforitoutagestartingin'] = 'Outage starting in {$a->countdown}.';
 $string['cliwaitforitparamactive'] = 'wait for the currently active outage.';
@@ -53,6 +56,12 @@ $string['cliwaitforitparamoutageid'] = 'the id of the outage to wait until it st
 $string['cliwaitforitparamsleep'] = 'maximum amount of seconds before status output.';
 $string['cliwaitforitparamverbose'] = 'enable verbose mode.';
 $string['clierrorinvalidvalue'] = 'Invalid value for parameter: {$a->param}';
+$string['clierrorinvalidvaluenotid'] = 'Param --{$a->param} must be an id number';
+$string['clierrorinvalidvaluenotbool'] = 'Param --{$a->param} must be set to either Y or N';
+$string['clierrorinvalidvaluenotnumber'] = 'Param --{$a->param} must be a number';
+$string['clierrorinvalidvaluenegativenumber'] = 'Param --{$a->param} must be a positive number';
+$string['clierrorinvalidvaluenotstring'] = 'Param --{$a->param} must be a string';
+$string['clierrorinvalidvalueemptystring'] = 'Param --{$a->param} must not be an empty string';
 $string['clierrormissingparamaters'] = 'You must specify the start time, use --help for more information.';
 $string['clierroroutagechanged'] = 'Outage was changed while waiting.';
 $string['clierroroutageended'] = 'Outage has already ended.';