diff --git a/oshipka/util/__init__.py b/oshipka/util/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/oshipka/util/os.py b/oshipka/util/os.py
new file mode 100644
index 0000000..637e8b3
--- /dev/null
+++ b/oshipka/util/os.py
@@ -0,0 +1,19 @@
+import subprocess
+
+
+def run_cmd(command):
+    process = subprocess.Popen(command.split(),
+                               stdout=subprocess.PIPE,
+                               stderr=subprocess.STDOUT,
+                               universal_newlines=True,
+                               )
+    return '\n'.join([str(line) for line in iter(process.stdout.readline, '')])
+
+
+def print_cmd(command):
+    for line in run_cmd(command):
+        print(line, end='')
+
+
+if __name__ == "__main__":
+    print_cmd("env")
\ No newline at end of file