tail：读取整个文件，然后跟随

Question

我想要一种tail -f读取整个文件然后在写入时继续遵循它的行为。

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解决方案

根据我接受的答案，这是有效的： tail -f -n +1 {filename}

工作原理：该-f选项继续“跟随”文件并在将新行写入文件时输出新行。该-n +1指示tail开始阅读从第一行的文件。使用-n -10将从文件的最后十行开始。

Answer 1

用

tail -f -n +1

使用man tail将为您提供更多详细信息，相关摘录如下。

<snip>Numbers having a leading plus (`+') sign are relative to the
beginning of the input, for example, ``-n +2'' starts the display at the
second line of the input.</snip>

-f      The -f option causes tail to not stop when end of file is
        reached, but rather to wait for additional data to be appended to
        the input.  The -f option is ignored if the standard input is a
        pipe, but not if it is a FIFO.

-n number
        The location is number lines.