K4caesar@tg says to Ubuntu 台灣社群 推薦這篇 https://wiki.bash-hackers.org/howto/redirection_tutorial?fbclid=IwAR0jrqeL1PAuSB4JOYN6Zg-FTpvz1MEybvJ9-rO3vqgkPUcSTf6scU1XjwU