🐧 Linux

1. Linux Distro Overview
2. Install OS (Ubuntu/Debian/RHEL)
3. User & Group Management
4. Filesystem Hierarchy
5. File Permission & Ownership
6. Package Management (apt, yum, dnf, snap)
7. Systemctl & Service Management
8. Crontab & Scheduled Tasks
9. Process Management (ps, top, htop)
10. Log Management (journalctl, /var/log)
11. Networking Basics (IP, DNS, Routes)
12. Firewall (iptables, ufw, nftables)
13. SSH Setup & Hardening
14. File Transfer (scp, rsync, sftp)
15. Disk Partitioning (fdisk, parted, LVM)
16. Mount & Fstab Configuration
17. LVM Basics (create, extend, snapshot)
18. RAID Setup (mdadm)
19. Swap & Memory Management
20. System Performance Tuning (sysctl, ulimit)
21. Kernel Upgrade & Modules
22. Install Web Server - Nginx
23. Install Web Server - Apache2
24. Install PHP & PHP-FPM
25. Install MySQL / MariaDB
26. Install PostgreSQL
27. DNS Server (Bind9, dnsmasq)
28. Mail Server Basics (Postfix, Dovecot)
29. FTP & SFTP Setup
30. Proxy Server (Squid)
31. Load Balancer (HAProxy, Nginx)
32. SSL/TLS Certificates (Let’s Encrypt)
33. Fail2ban Setup
34. AppArmor & SELinux
35. Backup with rsync & tar
36. Snapshot & Restore (LVM/ZFS)
37. Centralized Logging (Rsyslog, ELK)
38. Monitoring with Prometheus & Grafana
39. System Resource Monitoring (sar, iostat)
40. Containerization with Docker
41. Podman vs Docker
42. Basic Kubernetes Admin Tasks
43. Virtualization with KVM/QEMU
44. Proxmox Basics
45. VirtualBox Setup
46. Ansible Basics
47. Bash Scripting for Automation
48. Python for Sysadmin
49. Troubleshooting Boot Issues (grub, initramfs)
50. Network Troubleshooting (ping, traceroute, tcpdump)