diff --git a/docs/development/plugin-creation.md b/docs/development/plugin-creation.md
index 90a7a338c..13ee06120 100644
--- a/docs/development/plugin-creation.md
+++ b/docs/development/plugin-creation.md
@@ -19,7 +19,7 @@ source "$PLUGIN_PATH/common/functions"
 
 case "$1" in
   hello)
-    [[ -z $2 ]] && echo "Please specify an app to run the command on" && exit 1
+    [[ -z $2 ]] && dokku_log_fail "Please specify an app to run the command on"
     APP="$2"; IMAGE_TAG=$(get_running_image_tag $APP); IMAGE=$(get_app_image_name $APP $IMAGE_TAG)
     verify_app_name "$APP"
 
@@ -56,8 +56,7 @@ A few notes:
     ```shell
     IMAGE=$(docker images | grep "user/repo" | awk '{print $3}')
     if [[ -z $IMAGE ]]; then
-        echo "user/repo image not found... Did you run 'dokku plugins-install'?"
-        exit 1
+        dokku_log_fail "user/repo image not found... Did you run 'dokku plugins-install'?"
     fi
     ```
 
diff --git a/plugins/00_dokku-standard/commands b/plugins/00_dokku-standard/commands
index bd9864851..3d1838760 100755
--- a/plugins/00_dokku-standard/commands
+++ b/plugins/00_dokku-standard/commands
@@ -101,8 +101,7 @@ case "$1" in
   trace)
     [[ -d $DOKKU_ROOT/.dokkurc ]] || mkdir -p $DOKKU_ROOT/.dokkurc
     [[ "$2" == "on" ]] || [[ "$2" == "off" ]] || {
-      echo "Valid trace options are [on/off]"
-      exit 1
+      dokku_log_fail "Valid trace options are [on/off]"
     }
 
     if [[ "$2" == "on" ]]; then
@@ -121,7 +120,7 @@ case "$1" in
     ;;
 
   ls)
-    dokku_apps=$(ls -d $DOKKU_ROOT/*/ 2>/dev/null) || (echo "You haven't deployed any applications yet" && exit 1)
+    dokku_apps=$(ls -d $DOKKU_ROOT/*/ 2>/dev/null) || (dokku_log_fail "You haven't deployed any applications yet")
 
     dokku_col_log_info1_quiet "App Name" "Container Type" "Container Id" "Status"
 
@@ -143,7 +142,7 @@ case "$1" in
     ;;
 
   logs)
-    [[ -z $2 ]] && echo "Please specify an app to run the command on" && exit 1
+    [[ -z $2 ]] && dokku_log_fail "Please specify an app to run the command on"
     APP="$2"; verify_app_name "$2"
 
     if (is_deployed $APP); then
@@ -169,7 +168,7 @@ case "$1" in
     ;;
 
   run)
-    [[ -z $2 ]] && echo "Please specify an app to run the command on" && exit 1
+    [[ -z $2 ]] && dokku_log_fail "Please specify an app to run the command on"
     APP="$2"; IMAGE_TAG=$(get_running_image_tag $APP); IMAGE=$(get_app_image_name $APP $IMAGE_TAG)
     verify_app_name "$APP"
 
@@ -185,7 +184,7 @@ case "$1" in
     ;;
 
   url | urls)
-    [[ -z $2 ]] && echo "Please specify an app to run the command on" && exit 1
+    [[ -z $2 ]] && dokku_log_fail "Please specify an app to run the command on"
     APP="$2"; verify_app_name "$2"
     eval "$(config_export app $APP)"
 
@@ -217,10 +216,7 @@ case "$1" in
   ;;
 
   version)
-    cat "$DOKKU_ROOT/VERSION" || {
-      echo "Unable to determine dokku's version" 2>&1
-      exit 1
-    }
+    cat "$DOKKU_ROOT/VERSION" || dokku_log_fail "Unable to determine dokku's version"
     ;;
 
   help)
diff --git a/plugins/apps/commands b/plugins/apps/commands
index f2e29666d..55fdfb89a 100755
--- a/plugins/apps/commands
+++ b/plugins/apps/commands
@@ -9,7 +9,7 @@ case "$1" in
     ;;
 
   apps:create)
-    [[ -z $2 ]] && echo "Please specify an app to run the command on" && exit 1
+    [[ -z $2 ]] && dokku_log_fail "Please specify an app to run the command on"
     [[ -d "$DOKKU_ROOT/$2" ]] && dokku_log_warn "Name is already taken" && exit 1
     APP="$2"
 
@@ -18,8 +18,8 @@ case "$1" in
     ;;
 
   apps:destroy)
-    [[ -z $2 ]] && echo "Please specify an app to run the command on" && exit 1
-    [[ "$2" == "tls" ]] && echo "Unable to destroy tls directory" && exit 1
+    [[ -z $2 ]] && dokku_log_fail "Please specify an app to run the command on"
+    [[ "$2" == "tls" ]] && dokku_log_fail "Unable to destroy tls directory"
     [[ "$3" == "force" ]] && DOKKU_APPS_FORCE_DELETE=1
     APP="$2"; IMAGE_TAG=$(get_running_image_tag $APP)
     verify_app_name "$APP"
diff --git a/plugins/backup/commands b/plugins/backup/commands
index d964cde6e..1d1cf0655 100755
--- a/plugins/backup/commands
+++ b/plugins/backup/commands
@@ -50,14 +50,12 @@ case "$1" in
     tar xf $INPUT_FILE --directory=$BACKUP_TMP_DIR
 
     if [[ ! -f $BACKUP_TMP_DIR/.dokku_backup_version ]]; then
-      echo "Unable to determine backup version"
-      exit 1
+      dokku_log_fail "Unable to determine backup version"
     fi
 
     VERSION=$(< $BACKUP_TMP_DIR/.dokku_backup_version)
     if [[ $VERSION -ne 1 ]]; then
-      echo "Unknown format version $VERSION"
-      exit 1
+      dokku_log_fail "Unknown format version $VERSION"
     fi
 
     echo "Importing a version $VERSION backup..."
@@ -69,8 +67,7 @@ case "$1" in
       if $force; then
         echo "-f used. Ignoring warnings."
       else
-        echo "Archive did not pass sanity checks. Use -f to import anyway" >&2
-        exit 1
+        dokku_log_fail "Archive did not pass sanity checks. Use -f to import anyway"
       fi
     fi
 
diff --git a/plugins/certs/commands b/plugins/certs/commands
index ad1da8b24..3bb1d14e6 100755
--- a/plugins/certs/commands
+++ b/plugins/certs/commands
@@ -66,7 +66,7 @@ case "$1" in
     ;;
 
   certs:generate)
-    [[ -z $2 ]] && echo "Please specify an app to run the command on" && exit 1
+    [[ -z $2 ]] && dokku_log_fail "Please specify an app to run the command on"
     verify_app_name "$2"
     APP="$2"; DOMAIN="$3"; SSL_PATH="$DOKKU_ROOT/$APP/tls"
 
@@ -95,7 +95,7 @@ case "$1" in
     ;;
 
   certs:info)
-    [[ -z $2 ]] && echo "Please specify an app to run the command on" && exit 1
+    [[ -z $2 ]] && dokku_log_fail "Please specify an app to run the command on"
     verify_app_name "$2"
     APP="$2"; SSL_TYPE=$(is_ssl_enabled $APP)
     case "$SSL_TYPE" in
@@ -137,7 +137,7 @@ case "$1" in
     ;;
 
   certs:remove)
-    [[ -z $2 ]] && echo "Please specify an app to run the command on" && exit 1
+    [[ -z $2 ]] && dokku_log_fail "Please specify an app to run the command on"
     verify_app_name "$2"
     APP="$2"; APP_SSL_PATH="$DOKKU_ROOT/$APP/tls"
 
@@ -157,9 +157,12 @@ case "$1" in
   help | certs:help)
     cat && cat<<EOF
     certs:add <app> CRT KEY, Add an ssl endpoint to an app. Can also import from a tarball on stdin
+    certs:chain CRT [CRT ...], [NOT IMPLEMENTED] Print the ordered and complete chain for the given certificate.
     certs:generate <app> DOMAIN, Generate a key and certificate signing request (and self-signed certificate)
     certs:info <app>, Show certificate information for an ssl endpoint.
+    certs:key <app> CRT KEY [KEY ...], [NOT IMPLEMENTED] Print the correct key for the given certificate.
     certs:remove <app>, Remove an SSL Endpoint from an app.
+    certs:rollback <app>, [NOT IMPLEMENTED] Rollback an SSL Endpoint for an app.
     certs:update <app> CRT KEY, Update an SSL Endpoint on an app. Can also import from a tarball on stdin
 EOF
     ;;
diff --git a/plugins/config/functions b/plugins/config/functions
index bfdd610b2..a07d23fbc 100644
--- a/plugins/config/functions
+++ b/plugins/config/functions
@@ -38,7 +38,7 @@ config_parse_args() {
 
   if [[ "$DOKKU_CONFIG_TYPE" = "app" ]]; then
     if [[ -z $APP ]]; then
-      echo "Please specify an app to run the command on" >&2 && exit 1
+      dokku_log_fail "Please specify an app to run the command on"
     else
       verify_app_name "$2"
     fi
@@ -105,7 +105,7 @@ config_all() {
   is_config_export "$@" && config_export "$DOKKU_CONFIG_TYPE" "$APP" && exit 0
 
   [[ "$APP" ]] && DOKKU_CONFIG_TYPE=$APP
-  [[ ! -s $ENV_FILE ]] && echo "no config vars for $DOKKU_CONFIG_TYPE" && exit 1
+  [[ ! -s $ENV_FILE ]] && dokku_log_fail "no config vars for $DOKKU_CONFIG_TYPE"
 
   VARS=$(grep -Eo "export ([a-zA-Z_][a-zA-Z0-9_]*=.*)" $ENV_FILE | cut -d" " -f2-)
 
diff --git a/plugins/domains/commands b/plugins/domains/commands
index 399ff15d4..9f4f78a11 100755
--- a/plugins/domains/commands
+++ b/plugins/domains/commands
@@ -26,7 +26,7 @@ RE_IPV6="${RE_IPV6}\$"
 
 case "$1" in
   domains)
-    [[ -z $2 ]] && echo "Please specify an app to run the command on" && exit 1
+    [[ -z $2 ]] && dokku_log_fail "Please specify an app to run the command on"
     verify_app_name "$2"
     APP="$2"
 
@@ -40,7 +40,7 @@ case "$1" in
     ;;
 
   domains:setup)
-    [[ -z $2 ]] && echo "Please specify an app to run the command on" && exit 1
+    [[ -z $2 ]] && dokku_log_fail "Please specify an app to run the command on"
     verify_app_name "$2"
     APP="$2"; VHOST_PATH="$DOKKU_ROOT/$APP/VHOST"
 
@@ -73,7 +73,7 @@ case "$1" in
     ;;
 
   domains:add)
-    [[ -z $2 ]] && echo "Please specify an app to run the command on" && exit 1
+    [[ -z $2 ]] && dokku_log_fail "Please specify an app to run the command on"
     verify_app_name "$2"
     APP="$2"
 
@@ -103,7 +103,7 @@ case "$1" in
     ;;
 
   domains:clear)
-    [[ -z $2 ]] && echo "Please specify an app to run the command on" && exit 1
+    [[ -z $2 ]] && dokku_log_fail "Please specify an app to run the command on"
     verify_app_name "$2"
     APP="$2"
 
@@ -115,7 +115,7 @@ case "$1" in
     ;;
 
   domains:remove)
-    [[ -z $2 ]] && echo "Please specify an app to run the command on" && exit 1
+    [[ -z $2 ]] && dokku_log_fail "Please specify an app to run the command on"
     verify_app_name "$2"
     APP="$2"
 
diff --git a/plugins/ps/commands b/plugins/ps/commands
index 0acf81ac5..a24b10a58 100755
--- a/plugins/ps/commands
+++ b/plugins/ps/commands
@@ -5,7 +5,7 @@ source "$(dirname $0)/functions"
 
 case "$1" in
   ps)
-    [[ -z $2 ]] && echo "Please specify an app to run the command on" && exit 1
+    [[ -z $2 ]] && dokku_log_fail "Please specify an app to run the command on"
     APP="$2"; verify_app_name "$APP"; DOKKU_APP_RUNNING_CONTAINER_IDS=$(get_app_running_container_ids $APP)
     ! (is_deployed $APP) && echo "App $APP has not been deployed" && exit 0
 
@@ -17,7 +17,7 @@ case "$1" in
   ;;
 
   ps:start)
-    [[ -z $2 ]] && echo "Please specify an app to run the command on" && exit 1
+    [[ -z $2 ]] && dokku_log_fail "Please specify an app to run the command on"
     APP="$2"; IMAGE_TAG=$(get_running_image_tag $APP);
     verify_app_name "$APP"
 
@@ -31,7 +31,7 @@ case "$1" in
   ;;
 
   ps:stop)
-    [[ -z $2 ]] && echo "Please specify an app to run the command on" && exit 1
+    [[ -z $2 ]] && dokku_log_fail "Please specify an app to run the command on"
     APP="$2"; DOKKU_APP_RUNNING_CONTAINER_IDS=$(get_app_running_container_ids $APP)
     verify_app_name "$APP"
 
@@ -46,7 +46,7 @@ case "$1" in
   ;;
 
   ps:rebuild)
-    [[ -z $2 ]] && echo "Please specify an app to run the command on" && exit 1
+    [[ -z $2 ]] && dokku_log_fail "Please specify an app to run the command on"
     APP="$2"; verify_app_name "$APP"
 
     pluginhook -p receive-app $APP
@@ -63,7 +63,7 @@ case "$1" in
   ;;
 
   ps:restart)
-    [[ -z $2 ]] && echo "Please specify an app to run the command on" && exit 1
+    [[ -z $2 ]] && dokku_log_fail "Please specify an app to run the command on"
     APP="$2"; IMAGE_TAG=$(get_running_image_tag $APP)
     verify_app_name "$APP"
 
@@ -83,7 +83,7 @@ case "$1" in
   ;;
 
   ps:scale)
-    [[ -z $2 ]] && echo "Please specify an app to run the command on" && exit 1
+    [[ -z $2 ]] && dokku_log_fail "Please specify an app to run the command on"
     APP="$2"; IMAGE_TAG=$(get_running_image_tag $APP)
     verify_app_name "$APP"
 
diff --git a/plugins/tags/commands b/plugins/tags/commands
index a77f8bc93..1d8fb3cef 100755
--- a/plugins/tags/commands
+++ b/plugins/tags/commands
@@ -5,7 +5,7 @@ source "$(dirname $0)/functions"
 
 case "$1" in
   tags)
-    [[ -z $2 ]] && echo "Please specify an app to run the command on" && exit 1
+    [[ -z $2 ]] && dokku_log_fail "Please specify an app to run the command on"
     APP="$2"; IMAGE_REPO=$(get_app_image_repo $APP)
     verify_app_name "$APP"
 
@@ -14,7 +14,7 @@ case "$1" in
     ;;
 
   tags:create)
-    [[ -z $2 ]] && echo "Please specify an app to run the command on" && exit 1
+    [[ -z $2 ]] && dokku_log_fail "Please specify an app to run the command on"
     APP="$2"; IMAGE_TAG="$3"; IMAGE_REPO=$(get_app_image_repo $APP)
     verify_app_name "$APP"
 
@@ -24,7 +24,7 @@ case "$1" in
     ;;
 
   tags:deploy)
-    [[ -z $2 ]] && echo "Please specify an app to run the command on" && exit 1
+    [[ -z $2 ]] && dokku_log_fail "Please specify an app to run the command on"
     APP="$2"; IMAGE_TAG="$3"
     verify_app_name "$APP"
 
@@ -32,7 +32,7 @@ case "$1" in
     ;;
 
   tags:destroy)
-    [[ -z $2 ]] && echo "Please specify an app to run the command on" && exit 1
+    [[ -z $2 ]] && dokku_log_fail "Please specify an app to run the command on"
     APP="$2"; IMAGE_TAG="$3"; IMAGE_REPO=$(get_app_image_repo $APP)
     verify_app_name "$2"