diff -ur v3/ftp_ut.py v4/ftp_ut.py
--- v3/ftp_ut.py	2020-02-11 00:49:51.000000000 +0900
+++ v4/ftp_ut.py	2020-02-11 11:31:17.000000000 +0900
@@ -4,6 +4,7 @@
 
 import empty
 import cmd_ut
+import yaml_ut
 import dbg
 import arg
 import base
@@ -114,25 +115,63 @@
 
 	return empty.new( locals() )
 
+def get_site(site=''):
+	d = {}
+	for fn in base.path_lst( 'ftp_ut.yaml', __file__ ):
+		d.update( yaml_ut.load_fn( fn, {} ) )
+
+	if not d:
+		return None
+	ks = list( d.keys() )
+	get = lambda k: d.get(k).split() if k in ks else None
+
+	if site:
+		v = get(site)
+		return v if v else 'not found {}'.format(site)
+
+	if 'default' in ks:
+		k = d.get('default')
+		v = get(k)
+		return v if v else 'not found default {}'.format(k)
+
+	if len(ks) == 1:
+		return get( ks[0] ) 
+
+	return 'select by -s ption\n{}'.format( to_str( ks, pre='  ' ) )
+
 def help():
 	msgs = [
-		'[-h] [-dbg]',
+		'[-h] [-dbg] [-s site_name]',
 		'  host user passwd path ..',
 		'  host user passwd del path ..',
 		'  host user passwd mkdir path ..',
 		'  host user passwd rmdir path ..',
 		'  host user passwd ls path ..',
 		'  host user passwd lst path ..',
+		'',
+		'  site_name in ftp_ut.yaml, can ommit host user passwd'
 	]
 	dbg.help_exit( to_str( msgs ) )
 
 if __name__ == "__main__":
 	a = arg.new()
-	host = a.pop()
-	if not host or a.is_pop('-h'):
-		help()
-	user = a.pop()
-	passwd = a.pop()
+
+	site = a.pop_str('-s')
+	v = get_site( site )
+
+	(host, usr, passwd) = ('', '', '')
+	if v:
+		if type(v) == str:
+			dbg.err('err in .yaml, ' + v)
+			help()
+		(host, user, passwd) = v
+	else:
+		host = a.pop()
+		if not host or a.is_pop('-h'):
+			help()
+		user = a.pop()
+		passwd = a.pop()
+
 	paths = a.get_av()
 	if not paths:
 		help()