-             total       used       free     shared    buffers     cached
+           total        used        free      shared  buff/cache   available
 Mem:     263753976   76737332  187016644       2844     853528   67252400
--/+ buffers/cache:    8631404  255122572
 Swap:    268029948          0  268029948
-
 
         output = self._read_file("memload_sample_output.txt")
         mock_ssh.SSH().execute.return_value = (0, output, '')
         result = m._get_mem_usage()
-        expected_result = {"max": {"used": 76737332, "cached": 67252400,
-                                   "free": 187016644, "shared": 2844,
-                                   "total": 263753976, "buffers": 853528},
-                           "average": {"used": 76737332, "cached": 67252400,
-                                       "free": 187016644, "shared": 2844,
-                                       "total": 263753976, "buffers": 853528},
-                           "free": {"memory0": {"used": "76737332",
-                                                "cached": "67252400",
-                                                "free": "187016644",
-                                                "shared": "2844",
-                                                "total": "263753976",
-                                                "buffers": "853528"}}}
+        expected_result = {
+            "max": {
+                'shared': 2844,
+                'buff/cache': 853528,
+                'total': 263753976,
+                'free': 187016644,
+                'used': 76737332
+            },
+            "average": {
+                'shared': 2844,
+                'buff/cache': 853528,
+                'total': 263753976,
+                'free': 187016644,
+                'used': 76737332
+            },
+            "free": {
+                "memory0": {
+                    "used": "76737332",
+                    "buff/cache": "853528",
+                    "free": "187016644",
+                    "shared": "2844",
+                    "total": "263753976",
+                    "available": "67252400"
+                }
+            }
+        }
+
         self.assertEqual(result, expected_result)
 
     def _read_file(self, filename):
         with open(output) as f:
             sample_output = f.read()
         return sample_output
+
+
+def main():
+    unittest.main()
+
+
+if __name__ == '__main__':
+    main()
 
         fields = []
         free = {}
         ite = 0
-        average = {'total': 0, 'used': 0, 'free': 0, 'cached': 0, 'shared': 0,
-                   'buffers': 0}
-        maximum = {'total': 0, 'used': 0, 'free': 0, 'cached': 0, 'shared': 0,
-                   'buffers': 0}
+        average = {'total': 0, 'used': 0, 'free': 0, 'buff/cache': 0,
+                   'shared': 0}
+        maximum = {'total': 0, 'used': 0, 'free': 0, 'buff/cache': 0,
+                   'shared': 0}
 
         for row in result.split('\n'):
             line = row.split()
         interval = options.get("interval", 1)
         count = options.get("count", 1)
 
-        cmd = "free -s %s -c %s" % (interval, count)
+        cmd = "free -c '%s' -s '%s'" % (count, interval)
 
         result = self._execute_command(cmd)
         filtrated_result = self._filtrate_result(result)