参考文档:https://hadoop.apache.org/docs/r2.7.1/hadoop-project-dist/hadoop-common/FileSystemShell.html#df参考文档:https://hadoop.apache.org/docs/r2.7.1/hado
参考文档:https://hadoop.apache.org/docs/r2.7.1/hadoop-project-dist/hadoop-common/FileSystemShell.html#df参考文档:https://hadoop.apache.org/docs/r2.7.1/hado