Linux is the foundation of nearly every DevOps workflow. From homelab servers to production clusters, everything runs on it. I use Linux to:

  • Manage users, groups and permissions
  • Operate services and processes
  • Configure networking and storage
  • Automate administration tasks with the shell
  • And much more

Linux konular#

  1. linux-user-management = user creation, system users, sudo privileges on Debian- and RHEL-based systems
  2. group-management = group creation, primary vs supplementary groups, /etc/group
  3. file-permissions = chmod, chown, umask, SUID/SGID/sticky bit, ACLs
  4. system-information = /etc/os-release, uname, hostnamectl, distro identification
  5. sudo = visudo, /etc/sudoers, sudoers.d, NOPASSWD
  6. ssh = key generation, authorized_keys, sshd_config hardening
  7. systemd = systemctl, unit files, journalctl
  8. process-management = ps, top, kill, signals, zombies
  9. process-internals = programs as files, fork/exec, child processes, namespaces
  10. cron-timers = crontab syntax, [Timer] units
  11. networking-basics = ip, nmcli, netplan, interfaces
  12. dns = /etc/hosts, resolvectl, dig
  13. firewall = port rules, zones, persistence
  14. network-troubleshooting = ss, curl, tcpdump, layered diagnosis
  15. filesystem-hierarchy = what lives where on a Linux system
  16. disk-management = lsblk, parted, mkfs, /etc/fstab, swap
  17. lvm = logical volumes, extending volumes and filesystems
  18. disk-troubleshooting = df, du, inodes, deleted-but-open files
  19. log-management = /var/log, journalctl queries, logrotate
  20. selinux-apparmor = MAC, contexts, profiles, diagnosing denials
  21. security-hardening = baseline hardening, brute-force protection
  22. package-management = install, upgrade, repos, holds
  23. performance-triage = load average, CPU vs I/O wait, memory, disk I/O
  24. boot-process = GRUB → initramfs → systemd targets
Backward plumbing linux-user-management Forward