DevOps

Users/groups/permissions

systemd basics

Process/network tools (ps, lsof, ss)

Logs: journalctl

Cron basics

Pipeline: build → test → deploy

Secrets in CI (best practices)

Artifacts and caching

Rollback strategy overview

Deploy migrations safely

Images/containers basics

Volumes and networks

docker-compose for stacks

Multi-stage builds overview

Registry basics

Metrics/logs/traces overview

Alerting basics

Dashboards basics

Uptime checks

Incident response basics

SSH hardening basics

TLS certificates basics

Least privilege principle

Backups and restore drills

Patch management basics