在Ubuntu上安装Odoo8.0，新建数据库用户时提示No such file or dir...

秋刀鱼

错误信息如下，
marty@marty-HP:~$ sudo su postgres
[sudo] password for marty:
postgres@marty-HP:/home/marty$ postgres@openerp-desktop:/$ createuser -s openerp
bash: postgres@openerp-desktop:/$: No such file or directory