Tasks
Exact, safe, task-first OS guides for when you need to do one thing now without losing accuracy or context.
Use these when you need one OS job done cleanly.
Task Guides are for practical work: create a user, repair file access, inspect listening ports, mount a drive, or check memory pressure. Each guide stays focused on safe sequencing, verification, and cross-links back into deeper learning.
Computer and Hardware Fundamentals
Identify the machine model, operating system, CPU, and memory safely before you troubleshoot or buy upgrades.
Identify the main storage device and the current free space before cleanup, upgrade, or troubleshooting work.
Check whether the machine can see a device before you change settings, drivers, cables, or ports.
Processes
Find which processes are consuming memory and decide whether the problem is one process, many processes, or overall system pressure.
Check whether a service is running, restarting, stopped, or unhealthy before you restart or kill anything.
Choose between a shell job, a persistent session, and a supervised service so important work does not disappear when your session ends.
Identify the exact stuck process, choose the gentlest safe stop first, and verify that only the intended workload changed.
Files and Storage
Choose between copy and move deliberately so reorganization work does not turn into accidental data loss.
Measure large files and folders safely so cleanup starts from evidence instead of random deletion.
Find where disk space is actually being used and free space without deleting the wrong data.
Inspect disks, partitions, filesystems, and mount points before you run any storage-changing action.
Inspect an external disk first, then mount it deliberately without confusing the device, partition, filesystem, and mount point layers.
Check a file hash before you trust or use an important download.
Users and Permissions
Fix access on a file or folder by checking ownership, current permissions, and the real user path before changing anything.
Add a user without over-granting privileges, then verify the account behaves the way you intended.
Networking and Internet
Check which ports are listening, which process owns them, and whether that actually matches the service you expect.
Separate DNS, reachability, routing, and service checks instead of calling everything a network problem.
Software and Packages
Install software in a repeatable way without bypassing trust, source, or dependency checks.
Uninstall software without leaving the system in a confused state or removing shared dependencies blindly.
Scripting and Automation
Write a small OS automation script that is readable, testable, and safe to run more than once.
Schedule a script or command to run automatically and verify that the scheduled job actually executes.
Security, Operations, and Recovery
Narrow logs by time, service, and severity so you can explain what happened without reading everything.
Verify that a backup can actually be restored before you trust it during a real incident.
Check whether updates really finished, whether a reboot is still pending, and whether key services are healthy afterward.