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