bash 使用 cut 命令从右侧提取的代码？
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Code for extracting from the right side with cut command?
提问by vfclists
There is a sample of using the cutcommand to extract parts of a string starting from the left. An example is given below.
有一个使用该cut命令从左侧开始提取字符串部分的示例。下面给出一个例子。
$ echo "abc-def-ghi-jkl" | cut -d- -f-2
abc-def
How can the same code be adapted to extracting from the right side? I thought of reversing the words and applying the same method, but it was too complicated.
相同的代码如何适应从右侧提取？本来想把字倒过来套用同样的方法，但是太复杂了。
回答by iruvar
you could use rev
你可以使用 rev
echo "abc-def-ghi-jkl" | rev | cut -d- -f-2 | rev
回答by John Kugelman
$ echo "abc-def-ghi-jkl" | cut -d- -f3-
ghi-jkl
-2cuts up to the 2nd field. 3-cuts from the 3rd field on.
-2削减到第 2 场。3-从第三场开始削减。
