Django - Error: That port is already in use.

Django runserver 실행시 Error: That port is already in use. 가 발생하는 경우 아래와 같이 해당 프로세스를 죽인 후 다시 실행한다.

Error: That port is already in use.
#
# ps aux | grep -i manage
root        73  0.0  0.0      0     0 ?        S<    6월13   0:00 [charger_manager]
root     19540 23.6 78.9 2176508 803252 ?      Dl   13:22   5:07 /python manage.py runserver 0.0.0.0:8000
root     21738  0.0  0.2  12972  2052 pts/1    S+   13:44   0:00 grep --color=auto -i manage
# kill -9 19540
# ps aux | grep -i manage
root        73  0.0  0.0      0     0 ?        S<    6월13   0:00 [charger_manager]
root     21742  0.0  0.2  12972  2160 pts/1    S+   13:45   0:00 grep --color=auto -i manage
# python manage.py runserver 0.0.0.0:8000