diff --git a/Doc/library/sys.rst b/Doc/library/sys.rst
index f977f1389b61a5..81416d08f877a1 100644
--- a/Doc/library/sys.rst
+++ b/Doc/library/sys.rst
@@ -1997,6 +1997,30 @@ always available. Unless explicitly noted otherwise, all variables are read-only
    interpreter is pre-release (alpha, beta, or release candidate) then the
    local and remote interpreters must be the same exact version.
 
+   Note that the remote process must be able to read the temporary script file in terms
+   of permissions. If the caller is running under different user than the process,
+   the caller should grant permissions (typically ``os.fchmod(filename, 0o644)``).
+
+   Callers should adjust permissions before calling, for example::
+
+      import os
+      import sys
+      import tempfile
+
+      # delete=False is required so the file persists after closing
+      f = tempfile.NamedTemporaryFile(mode='w', suffix='.py', delete=False)
+      try:
+          with f:
+              f.write("print('Hello from remote!')")
+              os.chmod(f.name, 0o644)
+
+          sys.remote_exec(pid, f.name)
+      finally:
+          try:
+              os.unlink(f.name)
+          except OSError:
+              pass
+
    See :ref:`remote-debugging` for more information about the remote debugging
    mechanism.