diff --git a/python/online/fxreader/pr34/commands_typed/os.py b/python/online/fxreader/pr34/commands_typed/os.py
index dc04d62..34d76b0 100644
--- a/python/online/fxreader/pr34/commands_typed/os.py
+++ b/python/online/fxreader/pr34/commands_typed/os.py
@@ -5,10 +5,11 @@ import ctypes
 import os
 import sys
 import logging
+import dataclasses
 
 logger = logging.getLogger(__name__)
 
-from typing import (overload, Optional, Literal,)
+from typing import (overload, Optional, Literal, Any,)
 
 from .cli_bootstrap import PyProject
 
@@ -89,4 +90,45 @@ def runtime_libdirs_init(
 
                 ctypes.cdll.LoadLibrary(preload_found)
     else:
-        raise NotImplementedError
\ No newline at end of file
+        raise NotImplementedError
+
+class interfaces_index_t:
+    @dataclasses.dataclass(frozen=True)
+    class Interface:
+        @dataclasses.dataclass(frozen=True)
+        class AddrInfo:
+            family: str
+            local: str
+
+        name: str
+        addr_info: list[AddrInfo]
+
+def interfaces_index() -> list[Interfaces]:
+    ip_addr_res: Any = json.loads(
+        subprocess.check_output([
+            'ip', '-j', 'addr',
+        ]).decode('utf-8')
+    )
+
+    assert isinstance(ip_addr_res, list)
+
+    ip_addr_res2 = cast(list[Any], p_addr_res,)
+
+    assert all([
+        isinstance(o, dict)
+        for o in ip_addr_res2.items()
+    ])
+
+    ip_addr_res3 = cast(list[dict[Any, Any]], ip_addr_res2)
+
+    assert all([
+        assert isinstance(k, str)
+        for k, v in o.items()
+        for o in ip_addr_res3
+    ])
+
+    ip_addr_res4 = cast(list[dict[str, Any]], ip_addr_res3)
+
+    res : list[interfaces_index_t.Interface] = []
+
+    for o in ip_addr_res4: