diff --git a/sdata/lib/functions.sh b/sdata/lib/functions.sh
index b5b5a650d..a2455c2a2 100644
--- a/sdata/lib/functions.sh
+++ b/sdata/lib/functions.sh
@@ -292,8 +292,9 @@ function check_disk_space() {
   return 0
 }
 
-function auto_get_git_submodule(){
+function auto_update_git_submodule(){
   if git submodule status --recursive | grep -E '^[+-U]';then
+    # Note: `git pull --recurse-submodules` cannot substitute `git submodule update --init --recursive` cuz it does not init a submodule when needed.
     x git submodule update --init --recursive
   fi
 }
diff --git a/sdata/subcmd-install/3.files.sh b/sdata/subcmd-install/3.files.sh
index ad81c07de..209414038 100644
--- a/sdata/subcmd-install/3.files.sh
+++ b/sdata/subcmd-install/3.files.sh
@@ -46,8 +46,8 @@ function auto_backup_configs(){
 }
 
 #####################################################################################
-showfun auto_get_git_submodule
-v auto_get_git_submodule
+showfun auto_update_git_submodule
+v auto_update_git_submodule
 
 # Backup
 if [[ ! "${SKIP_BACKUP}" == true ]]; then auto_backup_configs; fi