BASH-如何将输出1和2重定向到文件和屏幕？

Question

how to redirect output 1 and 2 to file and screen?

command 2 1 > /tmp/log and 2 1 screen

all output to file and screen

thank you

Answer 1

The tee command directs output to both a file and the tty.

echo 'hi there'  2>&1 | tee outputfile

writes the same "hi there" to both outputfile and to the tty. This redirects 1 and 2.

From your description try script:

Linux / Unix Command: script

 Command Library
NAME

script - make typescript of terminal session  
SYNOPSIS

script [-a ] [-f ] [-q ] [-t ] [file ]  
DESCRIPTION

Script makes a typescript of everything printed on your terminal. It is useful for students who need a hardcopy record of an interactive session as proof of an assignment, as the typescript file can be printed out later with lpr(1).
If the argument file is given, script saves all dialogue in file If no file name is given, the typescript is saved in the file typescript

Answer 2

I have 1000 commands

example

apt-get install;
mc;
apt-get update;
echo "foo";
..
..
..
nano /etc/passwd;
ls /tmp/log;
mc;
screen

I need to send the result to the screen and also save into the file.

Nobody knows what will run the command.

Thank you