Curated platform guides

Command cheatsheets that explain the command

Fast enough to scan during an incident, detailed enough to teach every option before you paste it.

Curated from the verified catalogRisk visible before copyConcrete input and output

Platform guide · Linux

Linux commands cheat sheet

Practical Linux commands for files, processes, storage, networking, services, logs, security, and remote administration — with every option explained.

System and identity
Files and text
Storage and filesystems
Processes, services, and logs

Platform guide · macOS

macOS terminal cheat sheet

Useful macOS and Unix commands for Finder, Spotlight, Homebrew services, storage, networking, Git, and remote work — including BSD-specific variants.

System and identity
Finder, Spotlight, and clipboard
Files, text, and archives
Storage and filesystems

Shell guide · PowerShell 7

PowerShell commands cheat sheet

PowerShell 7 commands for Windows administration, files, objects, services, event logs, networking, security, JSON, and CSV — with 5.1 compatibility notes.

System and inventory
Files and archives
Processes and services
Logs and incident signals

Incident guide · System health

Linux system health cheat sheet

A read-first reference for CPU, memory, process, hardware, clock, and host identity checks during an incident.

Establish a baseline
Locate resource pressure
Correlate services and logs

Incident guide · Storage

Linux storage and filesystem cheat sheet

Inspect mounts, block devices, SMART, RAID, LVM, ZFS, Btrfs, XFS, and ext filesystems with non-destructive checks first.

Map capacity and devices
Check storage health
Find what consumes space

Incident guide · Network & DNS

Linux network and DNS troubleshooting cheat sheet

Trace interface, route, neighbor, resolver, DNSSEC, packet, path, TLS, and HTTP evidence from the host outward.

Host network state
DNS, path, TLS, and HTTP

Incident guide · Security

Linux security and access cheat sheet

Inspect SSH, firewall, audit, SELinux, AppArmor, Fail2ban, certificates, and access policy without silently changing enforcement.

Identity and remote access
Firewall and policy enforcement

Incident guide · Services & logs

Linux services and logs cheat sheet

Investigate systemd units, boots, journal storage, web-server configuration, and recent service failures.

systemd state and history
Web service configuration
Correlate process and file evidence

Incident guide · Containers

Docker, Kubernetes, Helm, and IaC cheat sheet

Inspect Docker, Kubernetes, Helm, Terraform, and Ansible state with bounded, read-only commands and local validation.

Docker runtime
Kubernetes and delivery configuration
Connect delivery state to Git

Incident guide · Databases

PostgreSQL, MySQL, and Redis diagnostics cheat sheet

Confirm database reachability, versions, recovery state, sessions, connections, memory, and bounded latency samples.

PostgreSQL and MySQL
Redis
Connectivity and DNS
TLS and access evidence

Incident guide · Mail

Exim, Postfix, and Dovecot cheat sheet

Investigate mail queues, routing, configuration, delivery history, authentication sessions, and mailbox state.

Exim queue, routing, and logs
Postfix queue, maps, and configuration
Dovecot users, mailboxes, and services
Common mail queue baseline

Incident guide · Git & CI/CD

Git recovery and CI/CD inspection cheat sheet

Understand repository state, changes, worktrees, reflog history, objects, and infrastructure configuration before modifying anything.

Git state and recovery evidence
Delivery configuration

More than a wall of commands

Compact first. Evidence one click away.

01
Scan the task and command
Sections follow real administrative jobs, not an A–Z dump.
02
Expand every flag
See what each executable, option, pipe, and argument does.
03
Verify the result
Concrete input, output, compatibility, risk, and sources.