从标准输出中获取输出的最后4个字符 [英] Get the last 4 characters of output from standard out

问题描述

我有一个正在运行并使用

I have a script that is running and uses

lspci -s 0a.00.1 

这将返回

0a.00.1 usb controller some text device 4dc9

我希望内联最后四个字符，这样

I want to get those last 4 characters inline such that

lspci -s 0a.00.1 | some command to give me the last 4 characters. 

推荐答案

使用-c开关对tail进行操作.例如，要获取"hello"的最后4个字符:

How about tail, with the -c switch. For example, to get the last 4 characters of "hello":

echo "hello" | tail -c 5
ello

请注意，由于echo添加了换行符，因此我使用了5(4 + 1).如下面的Brad Koch所建议，请使用echo -n防止添加换行符.

Note that I used 5 (4+1) because a newline character is added by echo. As suggested by Brad Koch below, use echo -n to prevent the newline character from being added.

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