def modify_permiss(self, path, name,R=True):
        '''
        change file or directory permission
        :param name: linux user name\
        :param R: Recursive modify permission
        :return:
        '''
        idshell = 'id %s'%(name)
        code, output = self.execshell(idshell)
        if 'No such' not in output:
            uid = re.findall('uid=(.*?)\(', output)[0]
            gid = re.findall('gid=(.*?)\(', output)[0]
            gname = re.findall('\((.*?)\)', output)[1]
            if R:
                chownshell = 'chown -R %s:%s %s'%(name, gname, path)
                code, output = self.execshell(chownshell)
            else:
                os.chown(path, int(uid), int(gid))