This tells tail to print the last ten lines of the specified file but, instead of exiting, it waits for more text to appear in the file and prints it as it appears.

该选项告诉tail打印指定文件的最后10行，但是它不仅打印已有的内容，还会等待该文件中将要出现的更多内容，并对其进行打印。

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We produce craft and technique advanced, ready-to-wear sample clothes adopt whole computer design, compose, put sample, print tail paper. Order follower can use the computer to sent the data.

公司生产工艺、技术先进，成家板房采用全电脑设计、排板、放样、打印唛架纸：跟单可用电脑传送资料；

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