in case symbolic link directories

csst_common/data_manager.py

@@ -584,13 +584,14 @@ class CsstMsDataManager:
             dfs_root = "/dfsroot"
 
         # (clear and) make directories
-        os.chdir(os.getenv("HOME"))  # in case cwd is in dir_l0 or dir_l1
         if os.path.exists(dir_l0):
-            os.system(f"rm -rf {dir_l0}")
+            os.system(f"rm -rf {dir_l0}/*")
+        else:
+            os.mkdir(dir_l0)
         if os.path.exists(dir_l1):
-            os.system(f"rm -rf {dir_l1}")
-        os.mkdir(dir_l0)
-        os.mkdir(dir_l1)
+            os.system(f"rm -rf {dir_l1}/*")
+        else:
+            os.mkdir(dir_l1)
 
         print("Making symbolic links ...")
         for i_rec in range(len(tbl)):