打印STDOUT / STDERR并将它们写入Bash中的文件？

Question

有没有办法让Bash将STDOUT / STDERR重定向到一个文件，但仍然将它们打印到终端？

Answer 1

This will redirect both STDOUT and STDERR to the same file:

some_command 2>&1 | tee file.log

Example

$ touch foo; ls foo asfdsafsadf 2>&1 | tee file.log
ls: asfdsafsadf: No such file or directory
foo
$ cat file.log
ls: asfdsafsadf: No such file or directory
foo

Answer 2

Use the tee command.

$ echo "hi" | tee output.txt
hi
[unix]$ ls
output.txt
[unix]$ cat output.txt 
hi