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