Systems + virtualisation
Operate hosts, guests, storage, databases and practical cloud services with explicit ownership, observed state, reversible change and proof of the service outcome.
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Begin with the category that owns the evidence or outcome, then choose the most specific guide. Diagnose before changing and preserve a recovery path when the work can affect data or access.
2 guides
Use careful operational methods for the specialist tools and data tasks that support teams encounter in real work.
Back to the category mapSet a defensible SQL Server memory ceiling from real host and workload evidence, preserve Windows and operational headroom, stage the change, and verify more than one counter.
SQL Server can generate a script for almost anything, but “a script was generated” does not mean the database—or even the object—is portable.
1 guide
Keep device management, automation, monitoring and platform transitions accountable from enrolment through verified handover.
Back to the category mapA helpdesk is not just a list of tickets. Plan and reconcile a self-hosted helpdesk migration so that active work.
2 guides
Diagnose Linux services, storage, networking, permissions and lifecycle from current state and distribution-appropriate evidence.
Back to the category mapWhen Linux reports that a disk is full, the tempting response is to find something large and delete it.
“The server is slow” is a valid user report, but it is not yet a resource diagnosis. Turn “the Linux server is slow” into time-correlated evidence.
1 guide
Map the request to the real cloud control, resource and evidence boundary before granting access or changing configuration.
Back to the category mapAn S3 request can fail even when a policy appears to contain the obvious action.
7 guides
Keep host, virtual machine, guest, network and storage actions separate while proving the workload outcome.
Back to the category mapRebuild a failed or retired Hyper-V host from a known design.
Inventory, operate, and recover a Hyper-V host from Server Core or PowerShell while keeping host actions, guest actions, and destructive recovery steps clearly separated.
Diagnose a Proxmox VE host whose networking or passthrough changed after installation.
Proxmox VE can present many storage technologies through one interface. That convenience can hide important differences.
“VMware Tools is not running” is a status, not a diagnosis. Determine whether VMware Tools is absent.
It does not remove the need to authenticate the host, protect the session and limit who can administer it.
A virtual machine missing from vCenter may still be running on an ESXi host. Its files may still be intact on a datastore.
1 guide
Diagnose Windows from effective configuration, logs and lifecycle state before applying repair commands or broad resets.
Back to the category mapTurn a cupboard, server room and mixed business-hardware estate into a prioritised lifecycle plan based on business dependency, supportability.
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