diff --git a/conf/app.ini b/conf/app.ini
index 3e5a126f8..f8ff81db7 100644
--- a/conf/app.ini
+++ b/conf/app.ini
@@ -3,8 +3,8 @@ RUN_USER = lunny
 
 [repository]
 ROOT = /Users/%(RUN_USER)s/git/gogs-repositories
-LANG_IGNS=Google Go|C|Python
-LICENSES=Apache v2 License|GPL v2|BSD (3-Clause) License
+LANG_IGNS=Google Go|C|Python|Ruby
+LICENSES=Apache v2 License|GPL v2|MIT License|BSD (3-Clause) License
 
 [server]
 HTTP_ADDR = 
diff --git a/conf/gitignore/Ruby b/conf/gitignore/Ruby
new file mode 100644
index 000000000..eb76b2485
--- /dev/null
+++ b/conf/gitignore/Ruby
@@ -0,0 +1,18 @@
+*.gem
+*.rbc
+.bundle
+.config
+coverage
+InstalledFiles
+lib/bundler/man
+pkg
+rdoc
+spec/reports
+test/tmp
+test/version_tmp
+tmp
+
+# YARD artifacts
+.yardoc
+_yardoc
+doc/
\ No newline at end of file
diff --git a/conf/license/MIT License b/conf/license/MIT License
new file mode 100644
index 000000000..be1d1ae04
--- /dev/null
+++ b/conf/license/MIT License	
@@ -0,0 +1,21 @@
+The MIT License (MIT)
+
+Copyright (c) 2014
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
\ No newline at end of file
diff --git a/models/publickey.go b/models/publickey.go
index 49d7f3082..2f32dc3f0 100644
--- a/models/publickey.go
+++ b/models/publickey.go
@@ -1,21 +1,30 @@
+// Copyright 2014 The Gogs Authors. All rights reserved.
+// Use of this source code is governed by a MIT-style
+// license that can be found in the LICENSE file.
+
 package models
 
 import (
+	"bufio"
 	"fmt"
+	"io"
 	"os"
 	"os/exec"
 	"path/filepath"
+	"strings"
+	"sync"
 	"time"
 
 	"github.com/Unknwon/com"
 )
 
 var (
+	sshOpLocker = sync.Mutex{}
 	//publicKeyRootPath string
-	sshPath       string
-	appPath       string
-	tmplPublicKey = "### autogenerated by gitgos, DO NOT EDIT\n" +
-		"command=\"%s serv key-%d\",no-port-forwarding," +
+	sshPath string
+	appPath string
+	// "### autogenerated by gitgos, DO NOT EDIT\n"
+	tmplPublicKey = "command=\"%s serv key-%d\",no-port-forwarding," +
 		"no-X11-forwarding,no-agent-forwarding,no-pty %s\n"
 )
 
@@ -77,9 +86,69 @@ func AddPublicKey(key *PublicKey) error {
 	return nil
 }
 
-func DeletePublicKey(key *PublicKey) error {
-	_, err := orm.Delete(key)
-	return err
+// DeletePublicKey deletes SSH key information both in database and authorized_keys file.
+func DeletePublicKey(key *PublicKey) (err error) {
+	if _, err = orm.Delete(key); err != nil {
+		return err
+	}
+
+	sshOpLocker.Lock()
+	defer sshOpLocker.Unlock()
+
+	p := filepath.Join(sshPath, "authorized_keys")
+	tmpP := filepath.Join(sshPath, "authorized_keys.tmp")
+	fr, err := os.Open(p)
+	if err != nil {
+		return err
+	}
+	defer fr.Close()
+
+	fw, err := os.Create(tmpP)
+	if err != nil {
+		return err
+	}
+	defer fw.Close()
+
+	buf := bufio.NewReader(fr)
+	for {
+		line, errRead := buf.ReadString('\n')
+		line = strings.TrimSpace(line)
+
+		if errRead != nil {
+			if errRead != io.EOF {
+				return errRead
+			}
+
+			// Reached end of file, if nothing to read then break,
+			// otherwise handle the last line.
+			if len(line) == 0 {
+				break
+			}
+		}
+
+		// Found the line and copy rest of file.
+		if strings.Contains(line, key.Content) {
+			if _, err = io.Copy(fw, fr); err != nil {
+				return err
+			}
+			break
+		}
+
+		// Still finding the line, copy the line that currently read.
+		if _, err = fw.WriteString(line + "\n"); err != nil {
+			return err
+		}
+
+		if errRead == io.EOF {
+			break
+		}
+	}
+
+	if err = os.Remove(p); err != nil {
+		return err
+	}
+
+	return os.Rename(tmpP, p)
 }
 
 func ListPublicKey(userId int64) ([]PublicKey, error) {
@@ -89,11 +158,16 @@ func ListPublicKey(userId int64) ([]PublicKey, error) {
 }
 
 func SaveAuthorizedKeyFile(key *PublicKey) error {
+	sshOpLocker.Lock()
+	defer sshOpLocker.Unlock()
+
 	p := filepath.Join(sshPath, "authorized_keys")
 	f, err := os.OpenFile(p, os.O_CREATE|os.O_WRONLY|os.O_APPEND, 0600)
 	if err != nil {
 		return err
 	}
+	defer f.Close()
+
 	//os.Chmod(p, 0600)
 	_, err = f.WriteString(GenAuthorizedKey(key.Id, key.Content))
 	return err
diff --git a/models/user.go b/models/user.go
index a0e4bb800..ffeb72525 100644
--- a/models/user.go
+++ b/models/user.go
@@ -142,6 +142,7 @@ func UpdateUser(user *User) (err error) {
 
 // DeleteUser completely deletes everything of the user.
 func DeleteUser(user *User) error {
+	// Check ownership of repository.
 	count, err := GetRepositoryCount(user)
 	if err != nil {
 		return errors.New("modesl.GetRepositories: " + err.Error())
@@ -151,6 +152,17 @@ func DeleteUser(user *User) error {
 
 	// TODO: check issues, other repos' commits
 
+	// Delete SSH keys.
+	keys := make([]PublicKey, 0, 10)
+	if err = orm.Find(&keys, &PublicKey{OwnerId: user.Id}); err != nil {
+		return err
+	}
+	for _, key := range keys {
+		if err = DeletePublicKey(&key); err != nil {
+			return err
+		}
+	}
+
 	_, err = orm.Delete(user)
 	// TODO: delete and update follower information.
 	return err
diff --git a/routers/repo/single.go b/routers/repo/single.go
index a0f444716..eda30c00a 100644
--- a/routers/repo/single.go
+++ b/routers/repo/single.go
@@ -1,3 +1,7 @@
+// Copyright 2014 The Gogs Authors. All rights reserved.
+// Use of this source code is governed by a MIT-style
+// license that can be found in the LICENSE file.
+
 package repo
 
 import (