如何将 stderr 重定向到文件? [英] How can I redirect stderr to a file?

问题描述

在 unix 中将标准错误描述符重定向到名为 error.txt 的文件所需的命令是什么?

What is the command required to redirect the standard error descriptor to a file called error.txt in unix?

到目前为止我有这个命令:

I have this command so far:

find / -name "report*" ________ error.txt

推荐答案

你可以像这样使用stderr handler 2:

You can use the stderr handler 2 like this:

find / -name "report*" 2>error.txt

看一个例子:

$ ls a1 a2
ls: cannot access a2: No such file or directory  <--- this is stderr
a1                                               <--- this is stdin
$ ls a1 a2 2>error.txt
a1
$ cat error.txt 
ls: cannot access a2: No such file or directory  <--- just stderr was stored

如 BASH Shell: How To Redirect stderr To stdout (redirectstderr 到 File )，这些是处理程序:

As read in BASH Shell: How To Redirect stderr To stdout ( redirect stderr to a File ), these are the handlers:

<头>

把手	姓名	说明
0	标准输入	标准输入(stdin)
1	标准输出	标准输出(stdout)
2	标准错误	标准错误(stderr)

---

注意与 &>error.txt 的区别，它同时重定向标准输入和标准错误(参见 在 bash 脚本中重定向标准错误和标准输出 或如何将标准输出和标准错误都重定向到文件):

---

Note the difference with &>error.txt, that redirects both stdin and stderr (see Redirect stderr and stdout in a bash script or How to redirect both stdout and stderr to a file):

$ ls a1 a2 &>error.txt
$ cat error.txt 
ls: cannot access a2: No such file or directory  <--- stdin and stderr
a1                                               <--- were stored

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