date --date='2 minutes ago' "+%Y-%m-%d %H:%M:%S"
출력: 2020-05-08 17:02:05
curl -s https://api.ipify.org
find . -name $1 -type d -maxdepth 5 -print0 | xargs -0 rm -r --
sudo cp -p /usr/share/zoneinfo/Asia/Seoul /etc/localtime
sudo lsof -iTCP -sTCP:LISTEN -n -P