diff --git a/README.md b/README.md
index 92eae43..81b6956 100644
--- a/README.md
+++ b/README.md
@@ -12,6 +12,7 @@ our new monitoring system that does not suck.
 - history support -> possible grafana interface
 - easy to create and extend checks
 - Requirements: python3 + binaries for certain checks
+- Minimal core logic - checks can check "anything"
 
 ### Planned features (game)
 
diff --git a/check-cli.py b/check-cli.py
index b92b55c..a12756e 100644
--- a/check-cli.py
+++ b/check-cli.py
@@ -2,18 +2,43 @@
 
 import check
 
+import argparse
+import logging
 
-checks = []
-
-checks.append(check.DNSCheck("www.ungleich.ch"))
-checks.append(check.DNSCheck("www.ungleich.ch", expected_result="2a0a:e5c0:0:2:400:b3ff:fe39:795c"))
-checks.append(check.DNSCheck("www.ungleich.ch", rr_type="A", expected_result="185.203.112.17"))
-
-for num_server in range(1,6):
-    server="d{}.ungleich.ch".format(num_server)
-
-    checks.append(check.DNSCheck("www.ungleich.ch", server=server))
+logging.basicConfig()
+log = logging.getLogger(None)
 
 
-for c in checks:
-    print("{} {}".format(c, c.check()))
+def do_checks():
+    checks = []
+
+    checks.append(check.DNSCheck("www.ungleich.ch"))
+    checks.append(check.DNSCheck("www.ungleich.ch", expected_result="2a0a:e5c0:0:2:400:b3ff:fe39:795c"))
+    checks.append(check.DNSCheck("www.ungleich.ch", rr_type="A", expected_result="185.203.112.17"))
+
+    for num_server in range(1,6):
+        server="d{}.ungleich.ch".format(num_server)
+
+        checks.append(check.DNSCheck("www.ungleich.ch", server=server))
+        checks.append(check.DFCheck(server))
+
+
+    for c in checks:
+        print("{} {}".format(c, c.check()))
+
+if __name__ == "__main__":
+    parser = argparse.ArgumentParser(description='checks')
+    parser.add_argument('--debug', help='Enable debug logging', action='store_true')
+    parser.add_argument('--verbose', help='Enable verbose logging', action='store_true')
+
+    args = parser.parse_args()
+
+    if args.debug:
+        log.setLevel(logging.DEBUG)
+        print("dbg")
+    elif args.verbose:
+        log.setLevel(logging.INFO)
+    else:
+        log.setLevel(logging.WARNING)
+
+    do_checks()
diff --git a/check.py b/check.py
index 0fc01fa..a7f460c 100644
--- a/check.py
+++ b/check.py
@@ -1,4 +1,8 @@
 import subprocess
+import logging
+
+logging.basicConfig()
+log = logging.getLogger("checks")
 
 class CheckException(Exception):
     pass
@@ -82,3 +86,37 @@ class DNSCheck(BaseCheck):
             name = "{}@{}".format(name, self.server)
 
         return name
+
+
+class DFCheck(BaseCheck):
+    def __init__(self, name, username="root", path="/"):
+        self.name = name
+        self.username = username
+        self.path = path
+
+        self.command = self.create_command()
+        log.info("Command = {}".format(self.command))
+
+    def create_command(self):
+        base_command ='ssh {}@{}'.format(self.username, self.name).split()
+        base_command.append("df {}".format(self.path))
+
+        return base_command
+
+    def check(self):
+        res = subprocess.run(self.command,
+                             capture_output=True,
+                             encoding="utf-8")
+
+        if not res.returncode == 0:
+            return (False, "")
+
+        return (True, res.stdout)
+
+    def __repr__(self):
+        return "<df {}>".format(self.__str__())
+
+    def __str__(self):
+        name = "{}:{}".format(self.name, self.path)
+
+        return name