🐧 Linux

1. Linux Distro Overview
2. Install OS (Ubuntu/Debian/RHEL)
3. Linux Baseline Best Practice
4. User & Group Management
5. Filesystem Hierarchy
6. File Permission & Ownership
7. Package Management (apt, yum, dnf, snap)
8. Systemctl & Service Management
9. Crontab & Scheduled Tasks
10. Process Management (ps, top, htop)
11. Log Management (journalctl, /var/log)
12. Networking Basics (IP, DNS, Routes)
13. Firewall (iptables, ufw, nftables)
14. SSH Setup & Hardening
15. File Transfer (scp, rsync, sftp)
16. Disk Partitioning (fdisk, parted, LVM)
17. Mount & Fstab Configuration
18. LVM Basics (create, extend, snapshot)
19. RAID Setup (mdadm)
20. Swap & Memory Management
21. System Performance Tuning (sysctl, ulimit)
22. Kernel Upgrade & Modules
23. Install Web Server - Nginx
24. Install Web Server - Apache2
25. Install PHP & PHP-FPM
26. Install MySQL / MariaDB
27. Install PostgreSQL
28. DNS Server (Bind9, dnsmasq)
29. Mail Server Basics (Postfix, Dovecot)
30. FTP & SFTP Setup
31. Proxy Server (Squid)
32. Load Balancer (HAProxy, Nginx)
33. SSL/TLS Certificates (Let’s Encrypt)
34. Fail2ban Setup
35. AppArmor & SELinux
36. Backup with rsync & tar
37. Snapshot & Restore (LVM/ZFS)
38. Centralized Logging (Rsyslog, ELK)
39. Monitoring with Prometheus & Grafana
40. System Resource Monitoring (sar, iostat)
41. Containerization with Docker
42. Podman vs Docker
43. Basic Kubernetes Admin Tasks
44. Virtualization with KVM/QEMU
45. Proxmox Basics
46. VirtualBox Setup
47. Ansible Basics
48. Bash Scripting for Automation
49. Python for Sysadmin
50. Troubleshooting Boot Issues (grub, initramfs)
51. Network Troubleshooting (ping, traceroute, tcpdump)
52. Linux Hardening Checklist (CIS Benchmark)
53. auditd Configuration
54. AIDE (File Integrity Monitoring)
55. PAM Configuration
56. sudo Best Practice
57. SSH Certificate Authentication
58. Rootkit Detection (chkrootkit, rkhunter)
59. Lynis Security Audit
60. XFS vs EXT4
61. Btrfs
62. ZFS on Linux
63. Multipath
64. iSCSI Initiator
65. NFS Server & Client
66. Samba File Sharing
67. Ceph Client
68. perf
69. vmstat
70. iotop
71. strace
72. lsof
73. sysstat
74. tuned
75. VLAN Configuration
76. Bonding / Teaming
77. Bridge Networking
78. VXLAN
79. GRE Tunnel
80. WireGuard VPN
81. nftables Deep Dive
82. Traffic Control (tc)