shell linux dhcp TFTP PXE cobbler DNS bind OpenVPN MYSQL rsyslog journalctl logrotate FTP NFS SAMBA sersync LVS Tomcat Memcached nginx HAproxy keepalived Docker Jumpserver Redis Zabbix kubernetes gitlab jenkins RabbitMQ ZooKeeper kafka Dubbo elasticsearch logstash kibana filebeat sed awk yum apt ssh RAID sudo chrony iptables NAT ceph Prometheus 工具 minio harbor systemctl kubeadm velero CSI Helm EFK ingress grafana Alertmanager CNI Calico Longhorn pipeline Coredns vctl KVM kubectl containerd docker-compose 待分类 Centos nmcli Vxlan