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