리눅스설정 ovpn bpf_trace_printk ceph ceph-osd vagrant-libvirt localGPT nvcc bind9 vagrant docker jaeger-ceph libvirt-vagrant 도커 레지스트리 net-scripts klosedstack BPF openvSwitch uprobe 도커 libvirt 쿠버네티스 인증서 ebpf nvidia-smi ovs x509 ubuntu yt-dlp dns kubeadm