diff -ur v8/ftp_ut.py v9/ftp_ut.py
--- v8/ftp_ut.py	2020-02-15 17:18:27.000000000 +0900
+++ v9/ftp_ut.py	2020-02-16 12:25:20.000000000 +0900
@@ -31,6 +31,9 @@
 		if r and debug:
 			r_ = r.replace('\n', '\\n\n')
 			dbg.out( to_str( r_.strip().split('\n'), pre='<|' ) )
+		if r is None:
+			dbg.out( 'timeout' )
+			r = ''
 		return r
 
 	def read_to(k):
@@ -42,11 +45,18 @@
 			if not r_:
 				break
 			r += r_
-		return r			
+		return r
 
 	def read_to_prompt():
 		return read_to( 'ftp> ' )
 
+	def add_prm( cmd, prm='' ):
+		return cmd + ' ' + prm if prm else cmd
+
+	def do_cmd(cmd):
+		write( cmd )
+		return read_to_prompt()
+
 	def login():
 		lst = [
 			'open {}'.format( host ),
@@ -55,8 +65,7 @@
 			'verb off',
 			'prompt off',
 		]
-		write( to_str(lst) )
-		return read_to_prompt()
+		return do_cmd( to_str(lst) )
 
 	def quit():
 		write('quit')
@@ -64,12 +73,9 @@
 		proc.kill()
 		proc.wait()
 
-	do_cmd = lambda cmd, prm='': write( cmd + ( ' ' + prm if prm else '' ) )
-
 	def ls(path=''):
-		do_cmd( 'ls', path )
-		r = read_to_prompt()
-		return r if r else ''
+		cmd = add_prm( 'ls', path )
+		return do_cmd( cmd )
 
 	def cd(path, lcd=True, back=False):
 		r = ''
@@ -77,16 +83,24 @@
 			if back:
 				n = path.count('/') + 1 if path else 0
 				path = to_str( ['..'] * n, delim='/' )
-			r += do_cmd( 'cd', path )
+			cmd = add_prm( 'cd', path )
+			do_cmd( cmd )
+			r += cmd + '\n'
 			if lcd:
-				r += do_cmd( 'lcd', path )
+				cmd = add_prm( 'lcd', path )
+				do_cmd( cmd )
+				r += cmd + '\n'
 		return r
 
 	def do_cd_cmd(cmd, path, lcd=True):
 		(dir_, name) = os.path.split( path )
-		r = ''		
+		r = ''
 		r += cd( dir_, lcd )
-		r += do_cmd( cmd, name )
+
+		cmd = add_prm( cmd, name )
+		do_cmd( cmd )
+		r += cmd + '\n'
+
 		r += cd( dir_, lcd, back=True )
 		return r
 
@@ -107,14 +121,23 @@
 		if dir_:
 			r += mkdir( dir_ )
 		if not is_exist( path ):
-			r += do_cmd( 'mkdir', path )
-			read_to_prompt()
+			cmd = add_prm( 'mkdir', path )
+			do_cmd( cmd )
+			r += cmd + '\n'
 		return r
 
 	def rmdir(path):
-		return do_cmd( 'rmdir', path )
+		cmd = add_prm( 'rmdir', path )
+		do_cmd( cmd )
+		return cmd + '\n'
+
+	def cut_dot(lst):
+		return list( filter( lambda s: s not in ( './', '../' ), lst ) )
 
-	def get_lst(path=''):
+	def cut_tail(lst, c):
+		return list( map( lambda s: s[:-1] if s and s[-1] == c else s, lst ) )
+
+	def get_lst(path='', dot=True):
 		r = ls(path) if path else ls()
 		lst = r.strip().split('\n')
 		lst = map( lambda s: s.split(), lst )
@@ -129,13 +152,41 @@
 			if ws[0][0] == 'd':
 				nm += '/'
 			rlst.append( nm )
-		return rlst
+		return rlst if dot else cut_dot( rlst )
 
 	def lstf(path=''):
 		return to_str( get_lst( path ), last=True )
 
+	def rm_rf(path):
+		s = get_kind( path )
+		if not s:
+			return ''
+
+		if s == 'f':
+			return del_( path )
+
+		lst = s.split( '\n' )
+		if not lst or lst[0] != 'd':
+			return ''
+
+		r = ''
+		lst = cut_tail( lst[1:], '/' )
+		for name in lst:
+			r += rm_rf( path + '/' + name )
+		r += rmdir( path )
+		return r
+
 	def is_exist(path):
-		return get_lst(path)
+		return get_lst( path )
+
+	def get_kind(path):
+		lst = get_lst( path )
+		if not lst:
+			return '' # no entry
+		if './' not in lst and '../' not in lst:
+			return 'f' # file
+		lst = cut_dot( lst )
+		return to_str( [ 'd' ] + lst ) # directory, and contents
 
 	def do_paths(f, paths):
 		r = ''
@@ -190,6 +241,7 @@
 		'  host user passwd rmdir path ..',
 		'  host user passwd ls path ..',
 		'  host user passwd lst path ..',
+		'  host user passwd rm_rf path ..',
 		'',
 		'  site_name in ftp_ut.yaml, can ommit host user passwd'
 	]
@@ -227,7 +279,7 @@
 	( p0, p1_ ) = ( paths[0], paths[1:] )
 	quiet = p0 in ( 'ls', 'lst' )
 
-	r = ftp.login()
+	ftp.login()
 	if not quiet:
 		dbg.out('login')
 
@@ -247,6 +299,8 @@
 		r = ftp.do_paths( ftp.ls, p1_ ) if p1_ else ftp.ls()
 	elif p0 == 'lst':
 		r = ftp.do_paths( ftp.lstf, p1_ ) if p1_ else ftp.lstf()
+	elif p0 == 'rm_rf':
+		r = ftp.do_paths( ftp.rm_rf, p1_ )
 	else:
 		r = ftp.do_paths( ftp.put, p1_ if p0 == 'put' else paths )
 	dbg.out( r, '' )