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