The tail command has another handy option, -f (follow).

tail 命令还有一个有用的选项 -f (follow)。

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By using the -f option, you tell the tool to emit the function name.

通过使用- f选项，可以告诉工具输出函数名。

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The Type 2 format is indicated by the "-f" option, as follows.

类型2格式由“- f”选项表示，如下所示。

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Also, Ford has been advertising the popular EcoBoost option on its F-150 trucks, touting the fact that its best-selling vehicle provides not only segment-leading fuel economy but also towing and performance capabilities that pickup-truck owners demand.

FORBES: In a Twist, Traditional Ads Launch Ford Into 'And Not Or'

Chevrolet plans to launch a new version of Silverado in the second quarter, and Ford is counting on the sales bump crated by its EcoBoost gasoline-powered option to keep momentum behind the segment-leading Ford F-150 for a while.

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