可以像这样使用stderr处理程序2：

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

请参见示例：

$ ls a1 a2
ls: cannot access a2: No such file or directory  <--- this is stderr
a1                                               <--- this is stdout
$ 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 ( redirect stderr to a File )中所示，这些是处理程序：
| 手柄|姓名|说明|
| - ------|- ------|- ------|
| 无|标准输入|标准输入（stdin）|
| 1个|标准输出|标准输出（stdout）|
| 第二章|标准错误|标准误差（stderr）|
请注意与&>error.txt的区别，&>error.txt同时重定向stdout和stderr（参见Redirect stderr and stdout in a bash script或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  <--- stdout and stderr
a1                                               <--- were stored