mkdir .config/pip vi pip.conf [global] trusted-host = pypi.python.org pypi.org files.pythonhosted.org 입력 후 저장 pip3 install apache-airflow 실행 airflow 중단 lsof -i tcp:8080 userui-MacBook-Pro:~ user$ lsof -i tcp:8080 COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME Python 3527 user 5u IPv4 0xa2a5be82343e8aa1 0t0 TCP *:http-alt (LISTEN) Python 3530 user 5u IPv4 0xa2a5be82343e8aa1 0t0 TCP *:http-alt..