其他命令操作文件系统，它们不受视图影响。
Other commands that operate on the file system are unaffected by views.
mount命令让文件系统及其目录可用。
The mount command makes the file system available, along with all of its contents.
注意，使用hadoop - 0.20命令检查文件系统。
Notice that you're using a command called hadoop-0.20 to inspect the file system.
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