diff --git a/Propellor.hs b/Propellor.hs
index 1bc1373..44673d1 100644
--- a/Propellor.hs
+++ b/Propellor.hs
@@ -1,5 +1,6 @@
 import Property
 import HostName
+import qualified Property.File as File
 import qualified Property.Apt as Apt
 import qualified Property.Ssh as Ssh
 import qualified Property.User as User
@@ -47,7 +48,7 @@ standardSystem suite = propertyList "standard system"
 	, User.nonsystem "joey"
 	, Apt.installed ["sudo"]
 	-- nopasswd because no password is set up for joey.
-	, lineInFile "/etc/sudoers" "joey ALL=(ALL:ALL) NOPASSWD:ALL"
+	, "/etc/sudoers" `File.containsLine` "joey ALL=(ALL:ALL) NOPASSWD:ALL"
 	, GitHome.installedFor "joey"
 	]
 
diff --git a/Property.hs b/Property.hs
index 4aba094..f00ddfa 100644
--- a/Property.hs
+++ b/Property.hs
@@ -127,25 +127,6 @@ cmdProperty' cmd params env = CmdProperty desc cmd params env
 	showp (Param s) = s
 	showp (File s) = s
 
-{- Replaces all the content of a file. -}
-fileHasContent :: FilePath -> [Line] -> Property
-fileHasContent f newcontent = FileProperty ("replace " ++ f)
-	f (\_oldcontent -> newcontent)
-
-{- Ensures that a line is present in a file, adding it to the end if not. -}
-lineInFile :: FilePath -> Line -> Property
-lineInFile f l = FileProperty (f ++ " contains:" ++ l) f go
-  where
-	go ls
-		| l `elem` ls = ls
-		| otherwise = ls++[l]
-
-{- Ensures that a line is not present in a file.
- - Note that the file is ensured to exist, so if it doesn't, an empty
- - file will be written. -}
-lineNotInFile :: FilePath -> Line -> Property
-lineNotInFile f l = FileProperty (f ++ " remove: " ++ l) f (filter (/= l))
-
 {- Makes a perhaps non-idempotent Property be idempotent by using a flag
  - file to indicate whether it has run before.
  - Use with caution. -}
diff --git a/Property/Apt.hs b/Property/Apt.hs
index 4d58574..653c0fc 100644
--- a/Property/Apt.hs
+++ b/Property/Apt.hs
@@ -7,6 +7,7 @@ import System.IO
 import Control.Monad
 
 import Property
+import qualified Property.File as File
 import Utility.SafeCommand
 import Utility.Process
 
@@ -47,7 +48,7 @@ stdSourcesList :: Suite -> Property
 stdSourcesList = setSourcesList . debCdn
 
 setSourcesList :: [Line] -> Property
-setSourcesList ls = fileHasContent sourcesList ls `onChange` update
+setSourcesList ls = sourcesList `File.hasContent` ls `onChange` update
 
 runApt :: [CommandParam] -> Property
 runApt ps = cmdProperty' "apt-get" ps env
diff --git a/Property/File.hs b/Property/File.hs
new file mode 100644
index 0000000..a4b2196
--- /dev/null
+++ b/Property/File.hs
@@ -0,0 +1,22 @@
+module Property.File where
+
+import Property
+
+{- Replaces all the content of a file. -}
+hasContent :: FilePath -> [Line] -> Property
+f `hasContent` newcontent = FileProperty ("replace " ++ f)
+	f (\_oldcontent -> newcontent)
+
+{- Ensures that a line is present in a file, adding it to the end if not. -}
+containsLine :: FilePath -> Line -> Property
+f `containsLine` l = FileProperty (f ++ " contains:" ++ l) f go
+  where
+	go ls
+		| l `elem` ls = ls
+		| otherwise = ls++[l]
+
+{- Ensures that a line is not present in a file.
+ - Note that the file is ensured to exist, so if it doesn't, an empty
+ - file will be written. -}
+lacksLine :: FilePath -> Line -> Property
+f `lacksLine` l = FileProperty (f ++ " remove: " ++ l) f (filter (/= l))
diff --git a/Property/Hostname.hs b/Property/Hostname.hs
index 7baf717..38e9dbe 100644
--- a/Property/Hostname.hs
+++ b/Property/Hostname.hs
@@ -1,11 +1,11 @@
 module Property.Hostname where
 
 import Property
+import qualified Property.File as File
 import Utility.SafeCommand
 
 type HostName = String
 
 set :: HostName -> Property
-set hostname = 
-	fileHasContent "/etc/hostname" [hostname]
-		`onChange` cmdProperty "hostname" [Param hostname]
+set hostname = "/etc/hostname" `File.hasContent` [hostname]
+	`onChange` cmdProperty "hostname" [Param hostname]
diff --git a/Property/Ssh.hs b/Property/Ssh.hs
index 141e349..98149bc 100644
--- a/Property/Ssh.hs
+++ b/Property/Ssh.hs
@@ -6,6 +6,7 @@ import System.FilePath
 
 import Property
 import Property.User
+import qualified Property.File as File
 import Utility.SafeCommand
 import Utility.Exception
 
@@ -18,8 +19,8 @@ sshdConfig = "/etc/ssh/sshd_config"
 
 setSshdConfig :: String -> Bool -> Property
 setSshdConfig setting allowed = combineProperties desc
-	[ lineNotInFile sshdConfig $ sshline (not allowed)
-	, lineInFile sshdConfig $ sshline allowed
+	[ sshdConfig `File.lacksLine` (sshline $ not allowed)
+	, sshdConfig `File.containsLine` (sshline allowed)
 	] `onChange` restartSshd
   where
 	desc = unwords [ "ssh config:", setting, sshBool allowed ]
diff --git a/Property/Tor.hs b/Property/Tor.hs
index b26ba68..7f7e724 100644
--- a/Property/Tor.hs
+++ b/Property/Tor.hs
@@ -2,12 +2,13 @@ module Property.Tor where
 
 import Property
 import Utility.SafeCommand
+import qualified Property.File as File
 import qualified Property.Apt as Apt
 
 isBridge :: Property
 isBridge = setup `requires` Apt.installed ["tor"]
   where
-	setup = fileHasContent "/etc/tor/torrc"
+	setup = "/etc/tor/torrc" `File.hasContent`
 		[ "SocksPort 0"
 		, "ORPort 443"
 		, "BridgeRelay 1"