diff --git a/Fileable.xcodeproj/project.pbxproj b/Fileable.xcodeproj/project.pbxproj
index 82be10b..3acb98f 100644
--- a/Fileable.xcodeproj/project.pbxproj
+++ b/Fileable.xcodeproj/project.pbxproj
@@ -10,9 +10,8 @@
 		259EE6222133C6D1005ECA44 /* Info.swift in Sources */ = {isa = PBXBuildFile; fileRef = 259EE6212133C6D1005ECA44 /* Info.swift */; };
 		259EE6242133C915005ECA44 /* BasicOperation.swift in Sources */ = {isa = PBXBuildFile; fileRef = 259EE6232133C915005ECA44 /* BasicOperation.swift */; };
 		25BACE361F9F9E25000D5127 /* Errors.swift in Sources */ = {isa = PBXBuildFile; fileRef = 25BACE351F9F9E25000D5127 /* Errors.swift */; };
-		25BACE381F9F9E6C000D5127 /* BasicOperation+Fileable.swift in Sources */ = {isa = PBXBuildFile; fileRef = 25BACE371F9F9E6C000D5127 /* BasicOperation+Fileable.swift */; };
+		25BACE381F9F9E6C000D5127 /* Operation+Fileable.swift in Sources */ = {isa = PBXBuildFile; fileRef = 25BACE371F9F9E6C000D5127 /* Operation+Fileable.swift */; };
 		25BACE3A1F9F9EB3000D5127 /* Info+Fileable.swift in Sources */ = {isa = PBXBuildFile; fileRef = 25BACE391F9F9EB3000D5127 /* Info+Fileable.swift */; };
-		25BACE3C1F9F9EDE000D5127 /* Utils+Fileable.swift in Sources */ = {isa = PBXBuildFile; fileRef = 25BACE3B1F9F9EDE000D5127 /* Utils+Fileable.swift */; };
 		25BACE3E1F9F9F12000D5127 /* iOS+Fileable.swift in Sources */ = {isa = PBXBuildFile; fileRef = 25BACE3D1F9F9F12000D5127 /* iOS+Fileable.swift */; };
 		25BACE401F9F9F36000D5127 /* FHS+Fileable.swift in Sources */ = {isa = PBXBuildFile; fileRef = 25BACE3F1F9F9F36000D5127 /* FHS+Fileable.swift */; };
 		D93F1CA21EAEDB6E009A7474 /* Fileable.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = D93F1C981EAEDB6E009A7474 /* Fileable.framework */; };
@@ -33,9 +32,8 @@
 		259EE6212133C6D1005ECA44 /* Info.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = Info.swift; sourceTree = "<group>"; };
 		259EE6232133C915005ECA44 /* BasicOperation.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = BasicOperation.swift; sourceTree = "<group>"; };
 		25BACE351F9F9E25000D5127 /* Errors.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = Errors.swift; sourceTree = "<group>"; };
-		25BACE371F9F9E6C000D5127 /* BasicOperation+Fileable.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = "BasicOperation+Fileable.swift"; sourceTree = "<group>"; };
+		25BACE371F9F9E6C000D5127 /* Operation+Fileable.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = "Operation+Fileable.swift"; sourceTree = "<group>"; };
 		25BACE391F9F9EB3000D5127 /* Info+Fileable.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = "Info+Fileable.swift"; sourceTree = "<group>"; };
-		25BACE3B1F9F9EDE000D5127 /* Utils+Fileable.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = "Utils+Fileable.swift"; sourceTree = "<group>"; };
 		25BACE3D1F9F9F12000D5127 /* iOS+Fileable.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = "iOS+Fileable.swift"; sourceTree = "<group>"; };
 		25BACE3F1F9F9F36000D5127 /* FHS+Fileable.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = "FHS+Fileable.swift"; sourceTree = "<group>"; };
 		D93F1C981EAEDB6E009A7474 /* Fileable.framework */ = {isa = PBXFileReference; explicitFileType = wrapper.framework; includeInIndex = 0; path = Fileable.framework; sourceTree = BUILT_PRODUCTS_DIR; };
@@ -69,9 +67,8 @@
 			children = (
 				D93F1CB21EAEDCC9009A7474 /* Fileable.swift */,
 				25BACE351F9F9E25000D5127 /* Errors.swift */,
-				25BACE371F9F9E6C000D5127 /* BasicOperation+Fileable.swift */,
+				25BACE371F9F9E6C000D5127 /* Operation+Fileable.swift */,
 				25BACE391F9F9EB3000D5127 /* Info+Fileable.swift */,
-				25BACE3B1F9F9EDE000D5127 /* Utils+Fileable.swift */,
 				25BACE3D1F9F9F12000D5127 /* iOS+Fileable.swift */,
 				25BACE3F1F9F9F36000D5127 /* FHS+Fileable.swift */,
 			);
@@ -236,10 +233,9 @@
 			files = (
 				25BACE3E1F9F9F12000D5127 /* iOS+Fileable.swift in Sources */,
 				D93F1CB31EAEDCC9009A7474 /* Fileable.swift in Sources */,
-				25BACE3C1F9F9EDE000D5127 /* Utils+Fileable.swift in Sources */,
 				25BACE3A1F9F9EB3000D5127 /* Info+Fileable.swift in Sources */,
 				25BACE361F9F9E25000D5127 /* Errors.swift in Sources */,
-				25BACE381F9F9E6C000D5127 /* BasicOperation+Fileable.swift in Sources */,
+				25BACE381F9F9E6C000D5127 /* Operation+Fileable.swift in Sources */,
 				25BACE401F9F9F36000D5127 /* FHS+Fileable.swift in Sources */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;
diff --git a/Sources/Fileable/BasicOperation+Fileable.swift b/Sources/Fileable/Operation+Fileable.swift
similarity index 55%
rename from Sources/Fileable/BasicOperation+Fileable.swift
rename to Sources/Fileable/Operation+Fileable.swift
index 8011e9f..f4ac8fa 100644
--- a/Sources/Fileable/BasicOperation+Fileable.swift
+++ b/Sources/Fileable/Operation+Fileable.swift
@@ -24,11 +24,24 @@ extension Fileable {
         try Fileable.fm.createDirectory(atPath: path, withIntermediateDirectories: true, attributes: nil)
     }
     
-    public func rm(_ target: String) throws {
-        try Fileable.fm.removeItem(atPath: target)
+    public func rm() throws {
+        try Fileable.fm.removeItem(atPath: self.path)
     }
     
-    public func mv(from fromPath: String, to toPath: String) throws {
-        try Fileable.fm.moveItem(atPath: fromPath, toPath: toPath)
+    public func mv(to toPath: String) throws {
+        try Fileable.fm.moveItem(atPath: self.path, toPath: toPath)
+    }
+
+    public func chmod(mode: Int) throws {
+        print("This function is not implemented now.")
+    }
+
+    public static func touch(_ path: String) throws {
+        let empty = ""
+        do {
+            try empty.write(toFile: path, atomically: true, encoding: String.Encoding.utf8)
+        } catch let error as NSError {
+            print("failed to write: \(error)")
+        }
     }
 }
diff --git a/Sources/Fileable/Utils+Fileable.swift b/Sources/Fileable/Utils+Fileable.swift
deleted file mode 100644
index f6fe773..0000000
--- a/Sources/Fileable/Utils+Fileable.swift
+++ /dev/null
@@ -1,22 +0,0 @@
-//
-//  Utils+Fileable.swift
-//  Fileable
-//
-//  Created by Shota Shimazu on 2017/10/25.
-//  Copyright © 2017-2018 Shota Shimazu. All rights reserved.
-//
-
-import Foundation
-
-// Utils
-extension Fileable {
-    
-    public func touch(_ path: String) throws {
-        let empty = ""
-        do {
-            try empty.write(toFile: path, atomically: true, encoding: String.Encoding.utf8)
-        } catch let error as NSError {
-            print("failed to write: \(error)")
-        }
-    }
-}