Updated for 2026

Linux Admin Roadmap

Master Linux system administration — from file permissions and networking to high availability, cloud infrastructure, and automation.

Linux Interview QuestionsAll Roadmaps
Recommended
Good to Know
Optional
1. Linux Foundation (Core Competency)
Linux File System Hierarchy
Users, Groups & Permissions
Process Management (systemd, init)
Package Management (apt, yum, dnf)
Disk & Storage Management (LVM, RAID, fstab)
Filesystem Quotas
2. Shell Scripting & Automation
Bash Scripting (Loops, Conditions, Functions)
Cron Jobs & Scheduling
AWK, SED, GREP (Text Processing)
Python for Sysadmin
3. Networking & Security
TCP/IP, DNS, DHCP, NTP
iptables / nftables / ufw
SSH Hardening & Key Management
VPN (OpenVPN, WireGuard)
SSL/TLS & Certificate Management
Fail2Ban, SELinux / AppArmor
4. Services & Infrastructure
Web Servers (Nginx, Apache)
Databases (MySQL, PostgreSQL)
Mail Servers (Postfix)
LDAP / Active Directory Integration
NFS, Samba (File Sharing)
Load Balancers (HAProxy)
5. Monitoring & Performance Tuning
top, htop, iotop, vmstat
Prometheus + Node Exporter + Grafana
Log Analysis (journalctl, syslog, ELK)
Kernel Tuning (sysctl)
6. Virtualization & Cloud
KVM / QEMU / Proxmox
Docker & Containers
AWS / Azure Basics (EC2, VMs)
Terraform (Basic Infra Provisioning)
Ansible (Server Configuration)
7. High Availability & Backup
Clustering (Pacemaker, Corosync)
Keepalived & VRRP
Backup Strategies (rsync, Bacula, Restic)
Disaster Recovery Planning
Linux System Administrator