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