diff --git a/src/contexts/aaa/aaa.go b/src/contexts/aaa/aaa.go
index a91eef58..c38af4ca 100644
--- a/src/contexts/aaa/aaa.go
+++ b/src/contexts/aaa/aaa.go
@@ -167,7 +167,7 @@ var Index = &ctx.Context{Name: "aaa", Help: "认证中心",
 				m.Echo(msg.Cap("sessid"))
 			} // }}}
 		}},
-		"md5": &ctx.Command{Name: "md5 [content][file filename]", Help: "散列",
+		"md5": &ctx.Command{Name: "md5 [file filename][content]", Help: "散列",
 			Formats: map[string]int{"file": 1},
 			Hand: func(m *ctx.Message, c *ctx.Context, key string, arg ...string) {
 				if m.Options("file") { // {{{
@@ -184,13 +184,16 @@ var Index = &ctx.Context{Name: "aaa", Help: "认证中心",
 				}
 				// }}}
 			}},
-		"rsa": &ctx.Command{Name: "rsa gen|encrypt|decrypt|sign|verify [key str][keyfile filename][signs str][signfile filename][file filename][mm str][mmfile filename] content",
-			Help: ` 密钥: rsa gen keyfile key.pem
+		"rsa": &ctx.Command{Name: "rsa gen|encrypt|decrypt|sign|verify [keyfile filename][key str][mmfile filename][mm str][signfile filename][signs str][file filename] content",
+			Help: ` gen生成密钥, encrypt公钥加密, decrypt私钥解密, sgin私钥签名, verify公钥验签,
+					keyfile密钥文件, key密钥字符串，mm加密文件, mm加密字符串, signfile签名文件，signs签名字符串,
+					file数据文件，content数据内容.
+					密钥: rsa gen keyfile key.pem
 					加密: rsa encrypt keyfile pubkey.pem mmfile mm.txt hello
 					解密: rsa decrypt keyfile key.pem mmfile mm.txt
 					签名: rsa sign keyfile key.pem signfile sign.txt hello
 					验签: rsa verify keyfile pubkey.pem signfile sign.txt hello`,
-			Formats: map[string]int{"key": 1, "keyfile": 1, "signs": 1, "signfile": 1, "file": 1, "mm": 1, "mmfile": 1},
+			Formats: map[string]int{"keyfile": 1, "key": 1, "mmfile": 1, "mm": 1, "signfile": 1, "signs": 1, "file": 1},
 			Hand: func(m *ctx.Message, c *ctx.Context, key string, arg ...string) {
 				if arg[0] == "gen" { // {{{
 					keys, e := rsa.GenerateKey(crand.Reader, 1024)
@@ -309,6 +312,23 @@ var Index = &ctx.Context{Name: "aaa", Help: "认证中心",
 				}
 				// }}}
 			}},
+		"deal": &ctx.Command{Name: "deal init|sell|buy|done [keyfile name][key str]", Help: "散列",
+			Formats: map[string]int{"file": 1},
+			Hand: func(m *ctx.Message, c *ctx.Context, key string, arg ...string) {
+				if m.Options("file") { // {{{
+					f, e := os.Open(m.Option("file"))
+					m.Assert(e)
+
+					h := md5.New()
+					io.Copy(h, f)
+
+					m.Echo(hex.EncodeToString(h.Sum([]byte{})[:]))
+				} else if len(arg) > 0 {
+					h := md5.Sum([]byte(arg[0]))
+					m.Echo(hex.EncodeToString(h[:]))
+				}
+				// }}}
+			}},
 	},
 	Index: map[string]*ctx.Context{
 		"void": &ctx.Context{Name: "void", Commands: map[string]*ctx.Command{"login": &ctx.Command{}}},
diff --git a/src/contexts/nfs/nfs.go b/src/contexts/nfs/nfs.go
index 3cf38a1c..98b7ee63 100644
--- a/src/contexts/nfs/nfs.go
+++ b/src/contexts/nfs/nfs.go
@@ -13,6 +13,7 @@ import ( // {{{
 	"os"
 	"strconv"
 	"strings"
+	"unicode"
 )
 
 // }}}
@@ -129,11 +130,11 @@ func (nfs *NFS) print(str string, arg ...interface{}) bool { // {{{
 }
 
 // }}}
-func (nfs *NFS) page(buf []string, pos int) int { // {{{
+func (nfs *NFS) page(buf []string, pos int, top int, height int) int { // {{{
 	nfs.escape("2J", "H")
 	begin := pos
 
-	for i := 0; i < nfs.height; i++ {
+	for i := 0; i < height; i++ {
 		if pos < len(buf) && pos >= 0 {
 			if len(buf[pos]) > nfs.width {
 				nfs.color(fmt.Sprintf("%s", buf[pos][:nfs.width]))
@@ -151,13 +152,13 @@ func (nfs *NFS) page(buf []string, pos int) int { // {{{
 }
 
 // }}}
-func (nfs *NFS) View() { // {{{
-	pos := len(nfs.pages) - nfs.height
+func (nfs *NFS) View(buf []string, top int, height int) { // {{{
+	pos := len(buf) - height
 	if pos < 0 {
 		pos = 0
 	}
 
-	nfs.page(nfs.pages, pos)
+	nfs.page(buf, pos, top, height)
 	for {
 		switch ev := termbox.PollEvent(); ev.Type {
 		case termbox.EventKey:
@@ -167,15 +168,15 @@ func (nfs *NFS) View() { // {{{
 			default:
 				switch ev.Ch {
 				case 'f':
-					if pos+nfs.height < len(nfs.pages) {
-						pos += nfs.height - 1
+					if pos+height < len(buf) {
+						pos += height - 1
 					}
 				case 'b':
-					if pos -= nfs.height - 1; pos < 0 {
+					if pos -= height - 1; pos < 0 {
 						pos = 0
 					}
 				case 'j':
-					if pos+1 < len(nfs.pages) {
+					if pos+1 < len(buf) {
 						pos += 1
 					}
 				case 'k':
@@ -185,7 +186,7 @@ func (nfs *NFS) View() { // {{{
 				case 'q':
 					return
 				}
-				nfs.page(nfs.pages, pos)
+				nfs.page(buf, pos, top, height)
 			}
 		}
 	}
@@ -218,20 +219,18 @@ func (nfs *NFS) Read(p []byte) (n int, err error) { // {{{
 				os.Exit(1)
 
 			case termbox.KeyCtrlV:
-				nfs.View()
-				nfs.page(nfs.pages, len(nfs.pages)-nfs.height)
+				nfs.View(nfs.pages, 0, nfs.height)
+				nfs.page(nfs.pages, len(nfs.pages)-nfs.height, 0, nfs.height)
 
 			case termbox.KeyCtrlL:
 				nfs.escape("2J", "H")
 
 			case termbox.KeyCtrlJ, termbox.KeyCtrlM:
-				tab = tab[:0]
-
 				buf = append(buf, rest...)
 				buf = append(buf, '\n')
 				nfs.print("\n")
 
-				b := []byte(string(buf[:len(buf)]))
+				b := []byte(string(buf))
 				n = len(b)
 				copy(p, b)
 				return
@@ -284,6 +283,25 @@ func (nfs *NFS) Read(p []byte) (n int, err error) { // {{{
 				buf = append(buf, rest[0])
 				rest = rest[1:]
 
+			case termbox.KeyCtrlW:
+				if len(buf) > 0 {
+					c := buf[len(buf)-1]
+					for len(buf) > 0 && unicode.IsSpace(c) && unicode.IsSpace(buf[len(buf)-1]) {
+						buf = buf[:len(buf)-1]
+					}
+
+					for len(buf) > 0 && unicode.IsPunct(c) && unicode.IsPunct(buf[len(buf)-1]) {
+						buf = buf[:len(buf)-1]
+					}
+
+					for len(buf) > 0 && unicode.IsLetter(c) && unicode.IsLetter(buf[len(buf)-1]) {
+						buf = buf[:len(buf)-1]
+					}
+
+					for len(buf) > 0 && unicode.IsDigit(c) && unicode.IsDigit(buf[len(buf)-1]) {
+						buf = buf[:len(buf)-1]
+					}
+				}
 			case termbox.KeyCtrlH:
 				if len(buf) == 0 {
 					continue
@@ -316,6 +334,11 @@ func (nfs *NFS) Read(p []byte) (n int, err error) { // {{{
 			case termbox.KeyCtrlY:
 				buf = append(buf, back...)
 
+			case termbox.KeyCtrlT:
+				if l := len(buf); l > 1 {
+					buf[l-1], buf[l-2] = buf[l-2], buf[l-1]
+				}
+
 			case termbox.KeyCtrlI:
 				if len(tab) == 0 {
 					tabi = 0