在 Unix 中删除回车 [英] Remove carriage return in Unix

问题描述

从 Unix 中的文件中删除所有回车符 \r 的最简单方法是什么?

What is the simplest way to remove all the carriage returns \r from a file in Unix?

推荐答案

我假设你的意思是回车 (CR, "\r", 0x0d) 在行的 ends 而不是盲目地在文件中(据我所知，您可能将它们放在字符串的中间).仅在第一行末尾使用带有 CR 的测试文件:

I'm going to assume you mean carriage returns (CR, "\r", 0x0d) at the ends of lines rather than just blindly within a file (you may have them in the middle of strings for all I know). Using this test file with a CR at the end of the first line only:

$ cat infile
hello
goodbye

$ cat infile | od -c
0000000   h   e   l   l   o  \r  \n   g   o   o   d   b   y   e  \n
0000017

dos2unix 如果它安装在您的系统上，则是可行的方法:

dos2unix is the way to go if it's installed on your system:

$ cat infile | dos2unix -U | od -c
0000000   h   e   l   l   o  \n   g   o   o   d   b   y   e  \n
0000016

如果由于某种原因 dos2unix 对您不可用，那么 sed 会做到:

If for some reason dos2unix is not available to you, then sed will do it:

$ cat infile | sed 's/\r$//' | od -c
0000000   h   e   l   l   o  \n   g   o   o   d   b   y   e  \n
0000016

如果由于某种原因 sed 对你不可用，那么 ed 会以一种复杂的方式来做:

If for some reason sed is not available to you, then ed will do it, in a complicated way:

$ echo ',s/\r\n/\n/
> w !cat
> Q' | ed infile 2>/dev/null | od -c
0000000   h   e   l   l   o  \n   g   o   o   d   b   y   e  \n
0000016

如果您的机器上没有安装任何这些工具，那么您会遇到比尝试转换文件更大的问题:-)

If you don't have any of those tools installed on your box, you've got bigger problems than trying to convert files :-)

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