IT Learning Directory (ITLDIR) for System Administrator

To become a successful system administrator, you should acquire knowledge across a broad spectrum of technical, operational, and managerial domains. Here's a categorized list of the knowledge contents: 1. Operating Systems System Imaging and Deployment Windows: Active Directory, Group Policy, PowerShell, Windows Server roles (e.g., DHCP, DNS, IIS). Linux/Unix: File systems (ext4, xfs, etc.), shell scripting, systemd, cron jobs, package management (apt, yum, rpm), networking configuration, SELinux, firewalls (iptables/nftables). MacOS (if applicable): System management tools, Apple Configurator, integration with Active Directory. 2. Networking Basics: TCP/IP, DNS, DHCP, NAT, VPNs. Hardware: Configuration and troubleshooting of routers, switches, access points. Protocols: HTTP/HTTPS, FTP, SMTP, SNMP, NTP. Advanced Networking: VLANs, subnetting, firewalls, load balancers, network security. Wi-Fi Management: Access point configuration, wireless standards (802.11ac/ax). Network ...