In this article I will show you how to redirect the standard output and the standard error to multiple files, with tee.
How to redirect the standard output (stdout) to multiple files:
Using tee: command | tee file1 file2
$ echo "hello" | tee f1 f2
hello
With this tee trick, you can also create multiple copies to files:
This command duplicates the /etc/passwd file to /home/razvan/pwbackup and /root/pwbackup
$ cat /etc/passwd | tee /home/razvan/pwbackup /root/pwbackup
How to redirect the standard error (stderr) to multiple files:
The tee command only accepts the standard output. To redirect the stderr to multiple files, redirect the stderr to stdout first and than use tee: command 2>&1 | tee file1 file2
$ gcc 2>&1 | tee f1 f2
gcc: fatal error: no input files
compilation terminated.