Server Command Guides
Find the command, the correct shell and the result to check.
Practical command-line guidance for Windows CMD, PowerShell, SSH and Linux. Every example identifies where it runs and explains how to check its result.
Search questions and command keywords, or browse the topics below.
Browse server command guides
Choose a topic to see every question and its practical answer.
Linux files & text commands
Navigate, inspect, edit and organise server files with explicit paths and carefully scoped changes.
Browse questions →10 questions · Shared server guidanceLinux users, ownership & permissions
Understand server identities, sudo rights, file ownership and targeted access changes without weakening shared services.
Browse questions →10 questions · Shared server guidancePackages, updates & system information
Identify the operating system, inspect package state and plan controlled updates with the correct distribution tools.
Browse questions →10 questions · Shared server guidanceProcesses, services & scheduled jobs
Inspect running work, control the intended service and verify recurring jobs without interrupting unrelated applications.
Browse questions →10 questions · Shared server guidanceLogs & incident diagnosis
Find the relevant service, boot and kernel evidence, correlate timestamps and preserve useful incident context.
Browse questions →10 questions · Shared server guidanceCPU, memory & performance
Measure resource pressure, distinguish guest and host constraints, and choose tuning changes from evidence rather than fixed percentages.
Browse questions →10 questions · Shared server guidanceDisk space, storage & filesystems
Map storage layers, diagnose capacity and mount problems, and prepare filesystem changes from the verified layout.
Browse questions →10 questions · Shared server guidanceLinux networking & DNS
Inspect addresses, routing, DNS, IPv4 and IPv6, reachability and targeted network traces.
Browse questions →10 questions · Shared server guidanceFirewall rules & secure exposure
Understand firewall ownership, narrowly scoped access rules, SELinux denials and authentication-related blocking.
Browse questions →10 questions · Shared server guidanceNginx, Apache & PHP
Identify the web stack, validate scoped configuration changes and diagnose routing, PHP and gateway errors.
Browse questions →10 questions · Shared server guidanceHTTPS, certificates & HTTP
Verify TLS, diagnose redirects, inspect certificates, plan ACME renewal and test HTTPS origins safely.
Browse questions →10 questions · Shared server guidanceMySQL, PostgreSQL & database access
Connect with protected credentials, inspect metadata and waits, and distinguish network readiness from authorised database access.
Browse questions →10 questions · Shared server guidanceDocker, deployments & automation
Inspect containers, logs and storage; validate Compose; and apply focused deployments with clear persistence and access boundaries.
Browse questions →10 questions · Shared server guidanceWindows CMD & PowerShell essentials
Choose the right Windows shell, identify your tools, and understand where server commands actually run.
Browse questions →10 questions · Shared server guidanceSSH connections & host verification
Connect to the correct server, verify its identity, and use clear, repeatable SSH connection settings.
Browse questions →10 questions · Shared server guidanceSSH keys & authentication
Generate, protect, enrol and retire SSH keys without exposing private credentials or losing verified access.
Browse questions →10 questions · Shared server guidanceSSH errors & session reliability
Diagnose connection and authentication failures using bounded checks, then keep legitimate administration sessions reliable.
Browse questions →10 questions · Shared server guidanceSCP, SFTP & file transfers
Transfer files between Windows and servers, verify integrity, and preserve destination permissions and existing data.
Browse questions →10 questions · Shared server guidanceWindows network & HTTP diagnostics
Test the client-side network path, DNS answers, TCP ports and HTTP responses before changing a remote server.
Browse questions →10 questions · Shared server guidanceWindows Server administration
Inspect Windows server resources, services, event logs, remote access and operating-system maintenance from PowerShell.
Browse questions →Know where each command runs
Opening PowerShell on your PC does not change the operating system of the server. Each example names its shell and explains the result to check.
Run on your own Windows computer in Command Prompt.
Run in PowerShell on your own Windows computer.
Connect with SSH first, then run on the Linux server.
Run on the Windows server in the stated remote session.
Example names and IP addresses are placeholders. Use the server, account, paths and port assigned to your service. Commands are text examples; copying one does not run it.
Find the answer that matches your setup
This collection covers 400 defined questions across dedicated and virtual servers. Commands and available features depend on your operating system, installed version, permissions, hardware and service agreement. Use the linked official references and the verification steps in each answer.