1) 방화벽 disable systemctl stop firewalld 2) 방화벽 부팅시 실행 disable systemctl disable firewalld 3) 방화벽 등록된 리스트 출력 firewall-cmd --list-ports 4) online copy (scp: secure copy) : local -> remote scp file1 root@192.168.0.1:/root/data scp -r folder1 root@192.168.0.1:/root/data : remote -> local scp root@192.168.0.1:/root/data /root