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