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Design, configure, and maintain server infrastructure (physical and virtual)
Manage operating systems (Linux/Windows Server), user access, patching cycles
Handle on-call rotations for hardware failures, OS crashes, network issues
Automate repetitive admin tasks using Bash, Python, or PowerShell scripts
Manage storage systems (NFS, SAN, NAS), backup policies, disaster recovery
Work closely with DevOps/Cloud teams to migrate workloads or standardize infra
Write runbooks and documentation for all operational procedures
Linux administration (RHEL/CentOS/Ubuntu): file systems, processes, cron, systemd
Windows Server: Active Directory, Group Policy, DNS, DHCP
Networking: TCP/IP, subnetting, VLANs, firewalls, load balancers
Virtualization: VMware vSphere, Hyper-V, KVM
Shell scripting: Bash (mandatory), PowerShell (bonus)
Storage management: RAID, LVM, SAN/NAS basics
Monitoring: Nagios, Zabbix, Prometheus basics
Core admin environment
Virtualization management
Configuration management & automation
Infrastructure monitoring
Version control for scripts and configs
Network packet analysis
Identity and access management
Remote server access
OSI Model and TCP/IP stack — cold, no exceptions
Linux filesystem hierarchy (/, /etc, /var, /proc, /sys)
Process management, signals, cgroups
Symmetric vs asymmetric encryption; PKI and certificates
RAID levels (0, 1, 5, 10) and when to use each
Install Linux (Ubuntu/CentOS) on bare metal or VM — real metal
Linux command line mastery: file ops, permissions, networking commands, services
Set up a home lab: VirtualBox or Proxmox with 3–4 VMs minimum
Learn Bash scripting: automate 10 real repetitive tasks (backup, log rotation, user creation)
Study networking: Subnetting, VLANs, DNS resolution process end-to-end
Deploy and manage a small network with VLANs in your lab
Learn Ansible: automate VM provisioning and software configuration
VMware Essentials or RHCSA exam preparation
Deploy Nagios or Zabbix in your lab to monitor all VMs with alerting
Set up LDAP / Active Directory on Windows Server in lab environment
RHCSA or CompTIA Linux+ certification
Contribute to open-source sysadmin tooling on GitHub
Apply for junior sysadmin / IT ops intern roles
Build a portfolio repo: Ansible playbooks, Bash scripts, runbooks, architecture diagrams
Move toward DevOps or Cloud — pure sysadmin roles are declining in product companies
Learn Terraform for infra-as-code to bridge into Cloud Engineer
Target Sr. Systems Engineer or DevOps transition by Year 2
Specialize in government/PSU/defense sector if staying in pure sysadmin
| Level | India | Global | Note |
|---|---|---|---|
| Fresher / 0–1 yr | ₹3.5L – ₹6L | $35K – $60K | IT services companies or PSU entry |
| Mid-level / 2–4 yr | ₹6L – ₹12L | $60K – $95K | Hybrid infra management roles |
| Senior / 5+ yr | ₹12L – ₹18L | $95K – $130K | Cloud-adjacent or defense sectors |
Ansible + Vagrant automation
ELK Stack across multiple VMs
Identity management & GPO
Automated alerting system
Red Hat · Paid (~$400)
Most respected hands-on sysadmin exam
CompTIA · Paid (~$350)
Beginner friendly, widely recognized
VMware · Paid (~$250)
Essential for virtualization path
Moderate remote potential. Most sysadmin roles prefer on-site or hybrid. To go remote: target cloud-adjacent companies running hybrid infra, learn Ansible + Terraform to bridge into DevOps.
Low scope for pure sysadmin freelancing. Better investment: transition to Cloud/DevOps for serious freelance income.
Staying in pure sysadmin without learning cloud/DevOps — career ceiling is low
Skipping networking fundamentals and going straight to tools
Not building a home lab — theory-only learning will not pass practical interviews
Role is transforming. Pure sysadmin demand declining in product companies (replaced by Cloud + IaC). Strong demand persists in PSUs, government, banking, and defense sectors. Engineers who add cloud/DevOps skills will command 2x premium.
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