diff --git a/csst_common/utils/_io.py b/csst_common/utils/_io.py
new file mode 100644
index 0000000000000000000000000000000000000000..70ec85bc556345029a89743e46cb591c8625fe2d
--- /dev/null
+++ b/csst_common/utils/_io.py
@@ -0,0 +1,18 @@
+import glob
+import os
+import shutil
+
+
+def remove_files(fmt=""):
+    """ Remove files matching the specified format. """
+    for fp in glob.glob(fmt):
+        os.remove(fp)
+
+
+def remove_dir(path=""):
+    """ Remove the specified directory. """
+    shutil.rmtree(path)
+
+
+
+