---
title: 'DevOps: find a procedure by task'
url: https://doc.liz6.com/en/devops
locale: en
area: devops
tags:
- Operations
date: 2026-09-12
modified: 2026-10-13
description: Use these pages for specific operations and diagnosis. Choose the task matching the observation, check prerequisites and where commands run, then verify expected results and recovery steps.
---

# DevOps: find a procedure by task

Use these pages for specific operations and diagnosis. Choose the task matching the observation, check prerequisites and where commands run, then verify expected results and recovery steps.

| Current task | Read |
| --- | --- |
| A service fails to start or keeps restarting | [systemd Operations Manual](/en/devops/systemd-ops) · [Docker Operations Manual](/en/devops/docker-ops) |
| DNS, HTTPS, and proxy access | [DNS Operations Manual](/en/devops/dns-ops) · [Certificate Operations Manual](/en/devops/cert-ops) · [Caddy Operations Manual](/en/devops/caddy-ops) · [Mihomo Operations Manual](/en/devops/mihomo-ops) |
| Network devices and firewall rules | [Network Device Operations Manual](/en/devops/netdev-ops) · [nftables Operations Manual](/en/devops/nftables-ops) · [Tailscale Operations Manual](/en/devops/tailscale-ops) · [SSH Operations Manual](/en/devops/ssh-ops) |
| Disk diagnosis, backups, and recovery | [Disk Diagnostics Manual](/en/devops/disk-ops) · [Storage Changes and Recovery Manual](/en/devops/storage-ops) · [Database Backup and Diagnostics Manual](/en/devops/db-ops) |
| Deployment and monitoring | [Kubernetes Operations Manual](/en/devops/k8s-ops) · [Helm Operations Manual](/en/devops/helm-ops) · [Prometheus Operations Manual](/en/devops/prometheus-ops) · [Grafana Operations Manual](/en/devops/grafana-ops) |
| Version, package, and kernel maintenance | [Git Operations Manual](/en/devops/git-ops) · [Perforce Operations Manual](/en/devops/p4-ops) · [Gentoo Package Operations Manual](/en/devops/package-ops) · [Kernel Operations Manual](/en/devops/kernel-ops) |
| Desktop connectivity and media | [Bluetooth Operations Manual](/en/devops/bluetooth-ops) · [Audio and Video Operations Manual](//en/devops/media-ops) |

For prerequisites, use the [networking path](/en/networking/00-learning-path) or [systems programming path](/en/systems-programming/00-learning-path). Host-specific addresses and recovery belong to [Homelab](/en/homelab). Verify the intended behavior and relevant data; a zero exit status alone is insufficient.