Don't have Telegram yet? Try it now!
https://www.enteroa.com/2016/11/07/bash-%ec%97%90%ec%84%9c%ec%9d%98-%eb%a9%80%ed%8b%b0-%ec%93%b0%eb%a0%88%eb%93%9c-%ea%b5%ac%ed%98%84/
bash 에서의 멀티 쓰레드 구현