추측보다는 측정

1. ps 1-1. ps aux bsd스타일로 명령을 실행하는 것. vixx@vixx-ThinkPad-P15v-Gen-1:~$ ps aux USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND root 1 0.3 0.0 167880 11556 ? Ss 15:37 0:01 /sbin/init sp root 2 0.0 0.0 0 0 ? S 15:37 0:00 [kthreadd] root 3 0.0 0.0 0 0 ? I< 15:37 0:00 [rcu_gp] root 4 0.0 0.0 0 0 ? I< 15:37 0:00 [rcu_par_gp] root 6 0.0 0.0 0 0 ? I< 15:37 0:00 [kworker/0:0H root 8 0.0 0.0 0 0 ? ..

systemctl status nginx.service journalctl -xe less /var/log/nginx/error.log sudo kill -9 port번호 ps -ef sudo /etc/init.d/nginx restart

version 확인 psql --version 접속하기 psql -h 127.0.0.1 -p 5432 -U 유저이름 디비이름