我使用crouton在我的chromebook上托管Ubuntu 14.04 LTS操作系统，我正在尝试使用openstack的devstack。但是，当我运行./stack.sh时，我收到错误消息：
df: '/mnt/stateful_partition': No such file or directory
df: '/usr/share/oem': No such file or directory
df: '/home/chronos': No such file or directory
df: '/home/.shadow/8ffdc7dfab0156490faeb957f20259a78406cdfa/mount': No such file or directory
df: '/home/chronos/user': No such file or directory
df: '/home/user/8ffdc7dfab0156490faeb957f20259a78406cdfa': No such file or directory
df: '/home/chronos/u-8ffdc7dfab0156490faeb957f20259a78406cdfa': No such file or directory
df: '/home/root/8ffdc7dfab0156490faeb957f20259a78406cdfa': No such file or directory
df: '/run/crw': No such file or directory
+ exit 1
任何帮助都会非常感激！