bash 如何使用 hexdump 显示前 x 个字节?

声明:本页面是StackOverFlow热门问题的中英对照翻译,遵循CC BY-SA 4.0协议,如果您需要使用它,必须同样遵循CC BY-SA许可,注明原文地址和作者信息,同时你必须将它归于原作者(不是我):StackOverFlow 原文地址: http://stackoverflow.com/questions/28183957/
Warning: these are provided under cc-by-sa 4.0 license. You are free to use/share it, But you must attribute it to the original authors (not me): StackOverFlow

提示:将鼠标放在中文语句上可以显示对应的英文。显示中英文
时间:2020-09-18 12:16:39  来源:igfitidea点击:

How to show the first x bytes using hexdump?

linuxbashunix

提问by OHHH

I have two files and I want to see if the first 40 bytes are similar. How can I do this using hex dump?

我有两个文件,我想看看前 40 个字节是否相似。我如何使用十六进制转储来做到这一点?

采纳答案by rici

If you are using the BSD hexdumputility (which will also be installed as hd, with a different default output format) then you can supply the -n40command line parameter to limit the dump to the first 40 bytes:

如果您正在使用 BSDhexdump实用程序(也将安装为hd,具有不同的默认输出格式),那么您可以提供-n40命令行参数以将转储限制为前 40 个字节:

hexdump -n40 filename

If you are using the Posix standard od, you need a capital N. You might find the following invocation useful:

如果您使用 Posix 标准od,则需要大写N。您可能会发现以下调用很有用:

od -N40 -w40 -tx1 -Ax filename

(You can do that with hexdump, too, but the format string is more work to figure out :) ).

(你也可以用 来做到这hexdump一点,但格式字符串需要更多的工作来弄清楚:))。

回答by Robin Hsu

Try this:

尝试这个:

head -c 40 myfile | hexdump

回答by zb'

Not sure why you need hexdump here,

不知道为什么这里需要 hexdump,

diff <(dd bs=1 count=40 if=file1) <(dd bs=1 count=40 if=file2)

with hexdump:

使用十六进制转储:

diff <(dd bs=1 count=40 if=file1|hexdump) <(dd bs=1 count=40 if=file2|hexdump)