DevOps as culture, practices and platform capability
SDLC: plan, code, build, test, release, deploy, operate, improve
Traditional ops vs DevOps vs SRE vs platform engineering
The five current DORA delivery metrics
Linux filesystem, packages, users, groups and permissions
Processes, systemd, resource inspection and logs
Shell, pipes, redirection and Bash scripting
SSH access, keys and secure administration
IP, ports, TCP/IP, DNS, HTTP/HTTPS and TLS
Firewalls, reverse proxies and load-balancing foundations
VMs, regions, zones and cloud shared responsibility
HANDS-ON LAB
Provision a Linux VM, connect with SSH keys, create a least-privilege operator, install and configure Nginx, deploy a static app, enable HTTPS in the lab environment, inspect logs and troubleshoot planted permission, port and service failures.
WORKPLACE SCENARIO
A newly provisioned server is reachable by SSH, but the application is unavailable to users. Learners follow a structured evidence path — DNS, network, port, process, service, log, configuration — to isolate the fault.