The first few lines, a few lines later viewing HDFS file, line number

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Returns the number of rows of random sample data
hadoop fs -cat / test / gonganbu / scene_analysis_suggestion / * | shuf -n 5

Return the first few rows of sample data
hadoop fs -cat / test / gonganbu / scene_analysis_suggestion / * | head -100

Returns the last few lines of sample data of
hadoop fs -cat / test / gonganbu / scene_analysis_suggestion / * | tail -5

View the number of lines of text
hadoop fs -cat hdfs: //172.16.0.226: 8020 / test / sys_dict / sysdict_case_type.csv | wc -l

View File Size (byte)
hadoop FS -du HDFS: //172.16.0.226: 8020 / the Test / sys_dict / *

hadoop fs -count hdfs://172.16.0.226:8020/test/sys_dict/*