- Linux/Unix System Administration - Installation and Configuration
OS: RedHat, CentOS, Debian, Suse, Ubuntu, FreeBSD.
Storage/File servers: ISCSI, DRBD, GlusterFS, Ceph, FTP, NFS, and Samba
Web Server/LB: Apache, Tomcat, Nginx, HAProxy
Database: MySQL/MariaDB, PostgreSQL, MongoDB
Mail Server: Postfix, Sendmail, IredMail, Qmail, and Zimbra.
Automation/ Scripting: Terraform, Ansible, Chef, Bash, and Python
Network Services: DNS, NTP, VPN, DHCP, OpenLDAP, and FreeIPA
Security: Ebtables/Iptables, Firewalld, SELinux, and ClamAV
Monitoring: Nagios, Zabbix, Prometheus, and Grafana
DevOps: Docker, Git, Jenkins, and Selenium
- Cloud Computing and Virtualization
KVM: Proxmox, RHEV, and OVIRT
VMware: vSphere 5.x, vSphere 6.x
Citrix: Xen 6.x, Xen 7.x
Cloud: AWS, GCP, Azure, and OpenStack
- Containers orchestration
Container Orchestration: Docker/Swarm, LXC/LXD, Kubernetes, Openshift.
-Networking and Security
Networking: good knowledge in subnetting, routing, and switching.
Firewalls, Routers, Load Balancers: Mikrotik, VyOS, Zeroshell, and PFsense.
VPN: Configure site-to-site VPN /vpn-as-service (L2TP-PPTP, OpenVPN, and Wireguard).