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shell随机抽样若干行

shell随机抽样实现

[dig@hadoop01 ~]$ shuf -n5 nohup.out
2017-10-18T12:42:46.027+0800    app_data.enterprise_data_gov  711103
2017-10-18T13:37:22.027+0800    app_data.enterprise_data_gov  1616844
2017-10-18T12:43:46.027+0800    app_data.enterprise_data_gov  723722
2017-10-18T14:26:31.027+0800    app_data.enterprise_data_gov  2567132
2017-10-18T12:39:49.027+0800    app_data.enterprise_data_gov  657521

随机抽取5行

参数说明:
-n d 抽取行数为d
-r 可重复